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rebase: vendor dependencies for Vault API

Browse Source 
Uses github.com/libopenstorage/secrets to communicate with Vault. This
removes the need for maintaining our own limited Vault APIs.

By adding the new dependency, several other packages got updated in the
process. Unused indirect dependencies have been removed from go.mod.

Signed-off-by: Niels de Vos <ndevos@redhat.com>
This commit is contained in:
Niels de Vos
2020-11-19 08:52:04 +01:00
committed by mergify[bot]
parent 7824cb5ed7
commit 91774fc936
618 changed files with 80427 additions and 31593 deletions
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Mozilla Public License, version 2.0
1. Definitions
1.1. “Contributor”
means each individual or legal entity that creates, contributes to the
creation of, or owns Covered Software.
1.2. “Contributor Version”
means the combination of the Contributions of others (if any) used by a
Contributor and that particular Contributor’s Contribution.
1.3. “Contribution”
means Covered Software of a particular Contributor.
1.4. “Covered Software”
means Source Code Form to which the initial Contributor has attached the
notice in Exhibit A, the Executable Form of such Source Code Form, and
Modifications of such Source Code Form, in each case including portions
thereof.
1.5. “Incompatible With Secondary Licenses”
means
a. that the initial Contributor has attached the notice described in
Exhibit B to the Covered Software; or
b. that the Covered Software was made available under the terms of version
1.1 or earlier of the License, but not also under the terms of a
Secondary License.
1.6. “Executable Form”
means any form of the work other than Source Code Form.
1.7. “Larger Work”
means a work that combines Covered Software with other material, in a separate
file or files, that is not Covered Software.
1.8. “License”
means this document.
1.9. “Licensable”
means having the right to grant, to the maximum extent possible, whether at the
time of the initial grant or subsequently, any and all of the rights conveyed by
this License.
1.10. “Modifications”
means any of the following:
a. any file in Source Code Form that results from an addition to, deletion
from, or modification of the contents of Covered Software; or
b. any new file in Source Code Form that contains any Covered Software.
1.11. “Patent Claims” of a Contributor
means any patent claim(s), including without limitation, method, process,
and apparatus claims, in any patent Licensable by such Contributor that
would be infringed, but for the grant of the License, by the making,
using, selling, offering for sale, having made, import, or transfer of
either its Contributions or its Contributor Version.
1.12. “Secondary License”
means either the GNU General Public License, Version 2.0, the GNU Lesser
General Public License, Version 2.1, the GNU Affero General Public
License, Version 3.0, or any later versions of those licenses.
1.13. “Source Code Form”
means the form of the work preferred for making modifications.
1.14. “You” (or “Your”)
means an individual or a legal entity exercising rights under this
License. For legal entities, “You” includes any entity that controls, is
controlled by, or is under common control with You. For purposes of this
definition, “control” means (a) the power, direct or indirect, to cause
the direction or management of such entity, whether by contract or
otherwise, or (b) ownership of more than fifty percent (50%) of the
outstanding shares or beneficial ownership of such entity.
2. License Grants and Conditions
2.1. Grants
Each Contributor hereby grants You a world-wide, royalty-free,
non-exclusive license:
a. under intellectual property rights (other than patent or trademark)
Licensable by such Contributor to use, reproduce, make available,
modify, display, perform, distribute, and otherwise exploit its
Contributions, either on an unmodified basis, with Modifications, or as
part of a Larger Work; and
b. under Patent Claims of such Contributor to make, use, sell, offer for
sale, have made, import, and otherwise transfer either its Contributions
or its Contributor Version.
2.2. Effective Date
The licenses granted in Section 2.1 with respect to any Contribution become
effective for each Contribution on the date the Contributor first distributes
such Contribution.
2.3. Limitations on Grant Scope
The licenses granted in this Section 2 are the only rights granted under this
License. No additional rights or licenses will be implied from the distribution
or licensing of Covered Software under this License. Notwithstanding Section
2.1(b) above, no patent license is granted by a Contributor:
a. for any code that a Contributor has removed from Covered Software; or
b. for infringements caused by: (i) Your and any other third party’s
modifications of Covered Software, or (ii) the combination of its
Contributions with other software (except as part of its Contributor
Version); or
c. under Patent Claims infringed by Covered Software in the absence of its
Contributions.
This License does not grant any rights in the trademarks, service marks, or
logos of any Contributor (except as may be necessary to comply with the
notice requirements in Section 3.4).
2.4. Subsequent Licenses
No Contributor makes additional grants as a result of Your choice to
distribute the Covered Software under a subsequent version of this License
(see Section 10.2) or under the terms of a Secondary License (if permitted
under the terms of Section 3.3).
2.5. Representation
Each Contributor represents that the Contributor believes its Contributions
are its original creation(s) or it has sufficient rights to grant the
rights to its Contributions conveyed by this License.
2.6. Fair Use
This License is not intended to limit any rights You have under applicable
copyright doctrines of fair use, fair dealing, or other equivalents.
2.7. Conditions
Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted in
Section 2.1.
3. Responsibilities
3.1. Distribution of Source Form
All distribution of Covered Software in Source Code Form, including any
Modifications that You create or to which You contribute, must be under the
terms of this License. You must inform recipients that the Source Code Form
of the Covered Software is governed by the terms of this License, and how
they can obtain a copy of this License. You may not attempt to alter or
restrict the recipients’ rights in the Source Code Form.
3.2. Distribution of Executable Form
If You distribute Covered Software in Executable Form then:
a. such Covered Software must also be made available in Source Code Form,
as described in Section 3.1, and You must inform recipients of the
Executable Form how they can obtain a copy of such Source Code Form by
reasonable means in a timely manner, at a charge no more than the cost
of distribution to the recipient; and
b. You may distribute such Executable Form under the terms of this License,
or sublicense it under different terms, provided that the license for
the Executable Form does not attempt to limit or alter the recipients’
rights in the Source Code Form under this License.
3.3. Distribution of a Larger Work
You may create and distribute a Larger Work under terms of Your choice,
provided that You also comply with the requirements of this License for the
Covered Software. If the Larger Work is a combination of Covered Software
with a work governed by one or more Secondary Licenses, and the Covered
Software is not Incompatible With Secondary Licenses, this License permits
You to additionally distribute such Covered Software under the terms of
such Secondary License(s), so that the recipient of the Larger Work may, at
their option, further distribute the Covered Software under the terms of
either this License or such Secondary License(s).
3.4. Notices
You may not remove or alter the substance of any license notices (including
copyright notices, patent notices, disclaimers of warranty, or limitations
of liability) contained within the Source Code Form of the Covered
Software, except that You may alter any license notices to the extent
required to remedy known factual inaccuracies.
3.5. Application of Additional Terms
You may choose to offer, and to charge a fee for, warranty, support,
indemnity or liability obligations to one or more recipients of Covered
Software. However, You may do so only on Your own behalf, and not on behalf
of any Contributor. You must make it absolutely clear that any such
warranty, support, indemnity, or liability obligation is offered by You
alone, and You hereby agree to indemnify every Contributor for any
liability incurred by such Contributor as a result of warranty, support,
indemnity or liability terms You offer. You may include additional
disclaimers of warranty and limitations of liability specific to any
jurisdiction.
4. Inability to Comply Due to Statute or Regulation
If it is impossible for You to comply with any of the terms of this License
with respect to some or all of the Covered Software due to statute, judicial
order, or regulation then You must: (a) comply with the terms of this License
to the maximum extent possible; and (b) describe the limitations and the code
they affect. Such description must be placed in a text file included with all
distributions of the Covered Software under this License. Except to the
extent prohibited by statute or regulation, such description must be
sufficiently detailed for a recipient of ordinary skill to be able to
understand it.
5. Termination
5.1. The rights granted under this License will terminate automatically if You
fail to comply with any of its terms. However, if You become compliant,
then the rights granted under this License from a particular Contributor
are reinstated (a) provisionally, unless and until such Contributor
explicitly and finally terminates Your grants, and (b) on an ongoing basis,
if such Contributor fails to notify You of the non-compliance by some
reasonable means prior to 60 days after You have come back into compliance.
Moreover, Your grants from a particular Contributor are reinstated on an
ongoing basis if such Contributor notifies You of the non-compliance by
some reasonable means, this is the first time You have received notice of
non-compliance with this License from such Contributor, and You become
compliant prior to 30 days after Your receipt of the notice.
5.2. If You initiate litigation against any entity by asserting a patent
infringement claim (excluding declaratory judgment actions, counter-claims,
and cross-claims) alleging that a Contributor Version directly or
indirectly infringes any patent, then the rights granted to You by any and
all Contributors for the Covered Software under Section 2.1 of this License
shall terminate.
5.3. In the event of termination under Sections 5.1 or 5.2 above, all end user
license agreements (excluding distributors and resellers) which have been
validly granted by You or Your distributors under this License prior to
termination shall survive termination.
6. Disclaimer of Warranty
Covered Software is provided under this License on an “as is” basis, without
warranty of any kind, either expressed, implied, or statutory, including,
without limitation, warranties that the Covered Software is free of defects,
merchantable, fit for a particular purpose or non-infringing. The entire
risk as to the quality and performance of the Covered Software is with You.
Should any Covered Software prove defective in any respect, You (not any
Contributor) assume the cost of any necessary servicing, repair, or
correction. This disclaimer of warranty constitutes an essential part of this
License. No use of any Covered Software is authorized under this License
except under this disclaimer.
7. Limitation of Liability
Under no circumstances and under no legal theory, whether tort (including
negligence), contract, or otherwise, shall any Contributor, or anyone who
distributes Covered Software as permitted above, be liable to You for any
direct, indirect, special, incidental, or consequential damages of any
character including, without limitation, damages for lost profits, loss of
goodwill, work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses, even if such party shall have been
informed of the possibility of such damages. This limitation of liability
shall not apply to liability for death or personal injury resulting from such
party’s negligence to the extent applicable law prohibits such limitation.
Some jurisdictions do not allow the exclusion or limitation of incidental or
consequential damages, so this exclusion and limitation may not apply to You.
8. Litigation
Any litigation relating to this License may be brought only in the courts of
a jurisdiction where the defendant maintains its principal place of business
and such litigation shall be governed by laws of that jurisdiction, without
reference to its conflict-of-law provisions. Nothing in this Section shall
prevent a party’s ability to bring cross-claims or counter-claims.
9. Miscellaneous
This License represents the complete agreement concerning the subject matter
hereof. If any provision of this License is held to be unenforceable, such
provision shall be reformed only to the extent necessary to make it
enforceable. Any law or regulation which provides that the language of a
contract shall be construed against the drafter shall not be used to construe
this License against a Contributor.
10. Versions of the License
10.1. New Versions
Mozilla Foundation is the license steward. Except as provided in Section
10.3, no one other than the license steward has the right to modify or
publish new versions of this License. Each version will be given a
distinguishing version number.
10.2. Effect of New Versions
You may distribute the Covered Software under the terms of the version of
the License under which You originally received the Covered Software, or
under the terms of any subsequent version published by the license
steward.
10.3. Modified Versions
If you create software not governed by this License, and you want to
create a new license for such software, you may create and use a modified
version of this License if you rename the license and remove any
references to the name of the license steward (except to note that such
modified license differs from this License).
10.4. Distributing Source Code Form that is Incompatible With Secondary Licenses
If You choose to distribute Source Code Form that is Incompatible With
Secondary Licenses under the terms of this version of the License, the
notice described in Exhibit B of this License must be attached.
Exhibit A - Source Code Form License Notice
This Source Code Form is subject to the
terms of the Mozilla Public License, v.
2.0. If a copy of the MPL was not
distributed with this file, You can
obtain one at
http://mozilla.org/MPL/2.0/.
If it is not possible or desirable to put the notice in a particular file, then
You may include the notice in a location (such as a LICENSE file in a relevant
directory) where a recipient would be likely to look for such a notice.
You may add additional accurate notices of copyright ownership.
Exhibit B - “Incompatible With Secondary Licenses” Notice
This Source Code Form is “Incompatible
With Secondary Licenses”, as defined by
the Mozilla Public License, v. 2.0.

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# errwrap
`errwrap` is a package for Go that formalizes the pattern of wrapping errors
and checking if an error contains another error.
There is a common pattern in Go of taking a returned `error` value and
then wrapping it (such as with `fmt.Errorf`) before returning it. The problem
with this pattern is that you completely lose the original `error` structure.
Arguably the _correct_ approach is that you should make a custom structure
implementing the `error` interface, and have the original error as a field
on that structure, such [as this example](http://golang.org/pkg/os/#PathError).
This is a good approach, but you have to know the entire chain of possible
rewrapping that happens, when you might just care about one.
`errwrap` formalizes this pattern (it doesn't matter what approach you use
above) by giving a single interface for wrapping errors, checking if a specific
error is wrapped, and extracting that error.
## Installation and Docs
Install using `go get github.com/hashicorp/errwrap`.
Full documentation is available at
http://godoc.org/github.com/hashicorp/errwrap
## Usage
#### Basic Usage
Below is a very basic example of its usage:
```go
// A function that always returns an error, but wraps it, like a real
// function might.
func tryOpen() error {
_, err := os.Open("/i/dont/exist")
if err != nil {
return errwrap.Wrapf("Doesn't exist: {{err}}", err)
}
return nil
}
func main() {
err := tryOpen()
// We can use the Contains helpers to check if an error contains
// another error. It is safe to do this with a nil error, or with
// an error that doesn't even use the errwrap package.
if errwrap.Contains(err, "does not exist") {
// Do something
}
if errwrap.ContainsType(err, new(os.PathError)) {
// Do something
}
// Or we can use the associated `Get` functions to just extract
// a specific error. This would return nil if that specific error doesn't
// exist.
perr := errwrap.GetType(err, new(os.PathError))
}
```
#### Custom Types
If you're already making custom types that properly wrap errors, then
you can get all the functionality of `errwraps.Contains` and such by
implementing the `Wrapper` interface with just one function. Example:
```go
type AppError {
Code ErrorCode
Err error
}
func (e *AppError) WrappedErrors() []error {
return []error{e.Err}
}
```
Now this works:
```go
err := &AppError{Err: fmt.Errorf("an error")}
if errwrap.ContainsType(err, fmt.Errorf("")) {
// This will work!
}
```

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// Package errwrap implements methods to formalize error wrapping in Go.
//
// All of the top-level functions that take an `error` are built to be able
// to take any error, not just wrapped errors. This allows you to use errwrap
// without having to type-check and type-cast everywhere.
package errwrap
import (
"errors"
"reflect"
"strings"
)
// WalkFunc is the callback called for Walk.
type WalkFunc func(error)
// Wrapper is an interface that can be implemented by custom types to
// have all the Contains, Get, etc. functions in errwrap work.
//
// When Walk reaches a Wrapper, it will call the callback for every
// wrapped error in addition to the wrapper itself. Since all the top-level
// functions in errwrap use Walk, this means that all those functions work
// with your custom type.
type Wrapper interface {
WrappedErrors() []error
}
// Wrap defines that outer wraps inner, returning an error type that
// can be cleanly used with the other methods in this package, such as
// Contains, GetAll, etc.
//
// This function won't modify the error message at all (the outer message
// will be used).
func Wrap(outer, inner error) error {
return &wrappedError{
Outer: outer,
Inner: inner,
}
}
// Wrapf wraps an error with a formatting message. This is similar to using
// `fmt.Errorf` to wrap an error. If you're using `fmt.Errorf` to wrap
// errors, you should replace it with this.
//
// format is the format of the error message. The string '{{err}}' will
// be replaced with the original error message.
func Wrapf(format string, err error) error {
outerMsg := "<nil>"
if err != nil {
outerMsg = err.Error()
}
outer := errors.New(strings.Replace(
format, "{{err}}", outerMsg, -1))
return Wrap(outer, err)
}
// Contains checks if the given error contains an error with the
// message msg. If err is not a wrapped error, this will always return
// false unless the error itself happens to match this msg.
func Contains(err error, msg string) bool {
return len(GetAll(err, msg)) > 0
}
// ContainsType checks if the given error contains an error with
// the same concrete type as v. If err is not a wrapped error, this will
// check the err itself.
func ContainsType(err error, v interface{}) bool {
return len(GetAllType(err, v)) > 0
}
// Get is the same as GetAll but returns the deepest matching error.
func Get(err error, msg string) error {
es := GetAll(err, msg)
if len(es) > 0 {
return es[len(es)-1]
}
return nil
}
// GetType is the same as GetAllType but returns the deepest matching error.
func GetType(err error, v interface{}) error {
es := GetAllType(err, v)
if len(es) > 0 {
return es[len(es)-1]
}
return nil
}
// GetAll gets all the errors that might be wrapped in err with the
// given message. The order of the errors is such that the outermost
// matching error (the most recent wrap) is index zero, and so on.
func GetAll(err error, msg string) []error {
var result []error
Walk(err, func(err error) {
if err.Error() == msg {
result = append(result, err)
}
})
return result
}
// GetAllType gets all the errors that are the same type as v.
//
// The order of the return value is the same as described in GetAll.
func GetAllType(err error, v interface{}) []error {
var result []error
var search string
if v != nil {
search = reflect.TypeOf(v).String()
}
Walk(err, func(err error) {
var needle string
if err != nil {
needle = reflect.TypeOf(err).String()
}
if needle == search {
result = append(result, err)
}
})
return result
}
// Walk walks all the wrapped errors in err and calls the callback. If
// err isn't a wrapped error, this will be called once for err. If err
// is a wrapped error, the callback will be called for both the wrapper
// that implements error as well as the wrapped error itself.
func Walk(err error, cb WalkFunc) {
if err == nil {
return
}
switch e := err.(type) {
case *wrappedError:
cb(e.Outer)
Walk(e.Inner, cb)
case Wrapper:
cb(err)
for _, err := range e.WrappedErrors() {
Walk(err, cb)
}
default:
cb(err)
}
}
// wrappedError is an implementation of error that has both the
// outer and inner errors.
type wrappedError struct {
Outer error
Inner error
}
func (w *wrappedError) Error() string {
return w.Outer.Error()
}
func (w *wrappedError) WrappedErrors() []error {
return []error{w.Outer, w.Inner}
}

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module github.com/hashicorp/errwrap

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Mozilla Public License, version 2.0
1. Definitions
1.1. "Contributor"
means each individual or legal entity that creates, contributes to the
creation of, or owns Covered Software.
1.2. "Contributor Version"
means the combination of the Contributions of others (if any) used by a
Contributor and that particular Contributor's Contribution.
1.3. "Contribution"
means Covered Software of a particular Contributor.
1.4. "Covered Software"
means Source Code Form to which the initial Contributor has attached the
notice in Exhibit A, the Executable Form of such Source Code Form, and
Modifications of such Source Code Form, in each case including portions
thereof.
1.5. "Incompatible With Secondary Licenses"
means
a. that the initial Contributor has attached the notice described in
Exhibit B to the Covered Software; or
b. that the Covered Software was made available under the terms of
version 1.1 or earlier of the License, but not also under the terms of
a Secondary License.
1.6. "Executable Form"
means any form of the work other than Source Code Form.
1.7. "Larger Work"
means a work that combines Covered Software with other material, in a
separate file or files, that is not Covered Software.
1.8. "License"
means this document.
1.9. "Licensable"
means having the right to grant, to the maximum extent possible, whether
at the time of the initial grant or subsequently, any and all of the
rights conveyed by this License.
1.10. "Modifications"
means any of the following:
a. any file in Source Code Form that results from an addition to,
deletion from, or modification of the contents of Covered Software; or
b. any new file in Source Code Form that contains any Covered Software.
1.11. "Patent Claims" of a Contributor
means any patent claim(s), including without limitation, method,
process, and apparatus claims, in any patent Licensable by such
Contributor that would be infringed, but for the grant of the License,
by the making, using, selling, offering for sale, having made, import,
or transfer of either its Contributions or its Contributor Version.
1.12. "Secondary License"
means either the GNU General Public License, Version 2.0, the GNU Lesser
General Public License, Version 2.1, the GNU Affero General Public
License, Version 3.0, or any later versions of those licenses.
1.13. "Source Code Form"
means the form of the work preferred for making modifications.
1.14. "You" (or "Your")
means an individual or a legal entity exercising rights under this
License. For legal entities, "You" includes any entity that controls, is
controlled by, or is under common control with You. For purposes of this
definition, "control" means (a) the power, direct or indirect, to cause
the direction or management of such entity, whether by contract or
otherwise, or (b) ownership of more than fifty percent (50%) of the
outstanding shares or beneficial ownership of such entity.
2. License Grants and Conditions
2.1. Grants
Each Contributor hereby grants You a world-wide, royalty-free,
non-exclusive license:
a. under intellectual property rights (other than patent or trademark)
Licensable by such Contributor to use, reproduce, make available,
modify, display, perform, distribute, and otherwise exploit its
Contributions, either on an unmodified basis, with Modifications, or
as part of a Larger Work; and
b. under Patent Claims of such Contributor to make, use, sell, offer for
sale, have made, import, and otherwise transfer either its
Contributions or its Contributor Version.
2.2. Effective Date
The licenses granted in Section 2.1 with respect to any Contribution
become effective for each Contribution on the date the Contributor first
distributes such Contribution.
2.3. Limitations on Grant Scope
The licenses granted in this Section 2 are the only rights granted under
this License. No additional rights or licenses will be implied from the
distribution or licensing of Covered Software under this License.
Notwithstanding Section 2.1(b) above, no patent license is granted by a
Contributor:
a. for any code that a Contributor has removed from Covered Software; or
b. for infringements caused by: (i) Your and any other third party's
modifications of Covered Software, or (ii) the combination of its
Contributions with other software (except as part of its Contributor
Version); or
c. under Patent Claims infringed by Covered Software in the absence of
its Contributions.
This License does not grant any rights in the trademarks, service marks,
or logos of any Contributor (except as may be necessary to comply with
the notice requirements in Section 3.4).
2.4. Subsequent Licenses
No Contributor makes additional grants as a result of Your choice to
distribute the Covered Software under a subsequent version of this
License (see Section 10.2) or under the terms of a Secondary License (if
permitted under the terms of Section 3.3).
2.5. Representation
Each Contributor represents that the Contributor believes its
Contributions are its original creation(s) or it has sufficient rights to
grant the rights to its Contributions conveyed by this License.
2.6. Fair Use
This License is not intended to limit any rights You have under
applicable copyright doctrines of fair use, fair dealing, or other
equivalents.
2.7. Conditions
Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted in
Section 2.1.
3. Responsibilities
3.1. Distribution of Source Form
All distribution of Covered Software in Source Code Form, including any
Modifications that You create or to which You contribute, must be under
the terms of this License. You must inform recipients that the Source
Code Form of the Covered Software is governed by the terms of this
License, and how they can obtain a copy of this License. You may not
attempt to alter or restrict the recipients' rights in the Source Code
Form.
3.2. Distribution of Executable Form
If You distribute Covered Software in Executable Form then:
a. such Covered Software must also be made available in Source Code Form,
as described in Section 3.1, and You must inform recipients of the
Executable Form how they can obtain a copy of such Source Code Form by
reasonable means in a timely manner, at a charge no more than the cost
of distribution to the recipient; and
b. You may distribute such Executable Form under the terms of this
License, or sublicense it under different terms, provided that the
license for the Executable Form does not attempt to limit or alter the
recipients' rights in the Source Code Form under this License.
3.3. Distribution of a Larger Work
You may create and distribute a Larger Work under terms of Your choice,
provided that You also comply with the requirements of this License for
the Covered Software. If the Larger Work is a combination of Covered
Software with a work governed by one or more Secondary Licenses, and the
Covered Software is not Incompatible With Secondary Licenses, this
License permits You to additionally distribute such Covered Software
under the terms of such Secondary License(s), so that the recipient of
the Larger Work may, at their option, further distribute the Covered
Software under the terms of either this License or such Secondary
License(s).
3.4. Notices
You may not remove or alter the substance of any license notices
(including copyright notices, patent notices, disclaimers of warranty, or
limitations of liability) contained within the Source Code Form of the
Covered Software, except that You may alter any license notices to the
extent required to remedy known factual inaccuracies.
3.5. Application of Additional Terms
You may choose to offer, and to charge a fee for, warranty, support,
indemnity or liability obligations to one or more recipients of Covered
Software. However, You may do so only on Your own behalf, and not on
behalf of any Contributor. You must make it absolutely clear that any
such warranty, support, indemnity, or liability obligation is offered by
You alone, and You hereby agree to indemnify every Contributor for any
liability incurred by such Contributor as a result of warranty, support,
indemnity or liability terms You offer. You may include additional
disclaimers of warranty and limitations of liability specific to any
jurisdiction.
4. Inability to Comply Due to Statute or Regulation
If it is impossible for You to comply with any of the terms of this License
with respect to some or all of the Covered Software due to statute,
judicial order, or regulation then You must: (a) comply with the terms of
this License to the maximum extent possible; and (b) describe the
limitations and the code they affect. Such description must be placed in a
text file included with all distributions of the Covered Software under
this License. Except to the extent prohibited by statute or regulation,
such description must be sufficiently detailed for a recipient of ordinary
skill to be able to understand it.
5. Termination
5.1. The rights granted under this License will terminate automatically if You
fail to comply with any of its terms. However, if You become compliant,
then the rights granted under this License from a particular Contributor
are reinstated (a) provisionally, unless and until such Contributor
explicitly and finally terminates Your grants, and (b) on an ongoing
basis, if such Contributor fails to notify You of the non-compliance by
some reasonable means prior to 60 days after You have come back into
compliance. Moreover, Your grants from a particular Contributor are
reinstated on an ongoing basis if such Contributor notifies You of the
non-compliance by some reasonable means, this is the first time You have
received notice of non-compliance with this License from such
Contributor, and You become compliant prior to 30 days after Your receipt
of the notice.
5.2. If You initiate litigation against any entity by asserting a patent
infringement claim (excluding declaratory judgment actions,
counter-claims, and cross-claims) alleging that a Contributor Version
directly or indirectly infringes any patent, then the rights granted to
You by any and all Contributors for the Covered Software under Section
2.1 of this License shall terminate.
5.3. In the event of termination under Sections 5.1 or 5.2 above, all end user
license agreements (excluding distributors and resellers) which have been
validly granted by You or Your distributors under this License prior to
termination shall survive termination.
6. Disclaimer of Warranty
Covered Software is provided under this License on an "as is" basis,
without warranty of any kind, either expressed, implied, or statutory,
including, without limitation, warranties that the Covered Software is free
of defects, merchantable, fit for a particular purpose or non-infringing.
The entire risk as to the quality and performance of the Covered Software
is with You. Should any Covered Software prove defective in any respect,
You (not any Contributor) assume the cost of any necessary servicing,
repair, or correction. This disclaimer of warranty constitutes an essential
part of this License. No use of any Covered Software is authorized under
this License except under this disclaimer.
7. Limitation of Liability
Under no circumstances and under no legal theory, whether tort (including
negligence), contract, or otherwise, shall any Contributor, or anyone who
distributes Covered Software as permitted above, be liable to You for any
direct, indirect, special, incidental, or consequential damages of any
character including, without limitation, damages for lost profits, loss of
goodwill, work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses, even if such party shall have been
informed of the possibility of such damages. This limitation of liability
shall not apply to liability for death or personal injury resulting from
such party's negligence to the extent applicable law prohibits such
limitation. Some jurisdictions do not allow the exclusion or limitation of
incidental or consequential damages, so this exclusion and limitation may
not apply to You.
8. Litigation
Any litigation relating to this License may be brought only in the courts
of a jurisdiction where the defendant maintains its principal place of
business and such litigation shall be governed by laws of that
jurisdiction, without reference to its conflict-of-law provisions. Nothing
in this Section shall prevent a party's ability to bring cross-claims or
counter-claims.
9. Miscellaneous
This License represents the complete agreement concerning the subject
matter hereof. If any provision of this License is held to be
unenforceable, such provision shall be reformed only to the extent
necessary to make it enforceable. Any law or regulation which provides that
the language of a contract shall be construed against the drafter shall not
be used to construe this License against a Contributor.
10. Versions of the License
10.1. New Versions
Mozilla Foundation is the license steward. Except as provided in Section
10.3, no one other than the license steward has the right to modify or
publish new versions of this License. Each version will be given a
distinguishing version number.
10.2. Effect of New Versions
You may distribute the Covered Software under the terms of the version
of the License under which You originally received the Covered Software,
or under the terms of any subsequent version published by the license
steward.
10.3. Modified Versions
If you create software not governed by this License, and you want to
create a new license for such software, you may create and use a
modified version of this License if you rename the license and remove
any references to the name of the license steward (except to note that
such modified license differs from this License).
10.4. Distributing Source Code Form that is Incompatible With Secondary
Licenses If You choose to distribute Source Code Form that is
Incompatible With Secondary Licenses under the terms of this version of
the License, the notice described in Exhibit B of this License must be
attached.
Exhibit A - Source Code Form License Notice
This Source Code Form is subject to the
terms of the Mozilla Public License, v.
2.0. If a copy of the MPL was not
distributed with this file, You can
obtain one at
http://mozilla.org/MPL/2.0/.
If it is not possible or desirable to put the notice in a particular file,
then You may include the notice in a location (such as a LICENSE file in a
relevant directory) where a recipient would be likely to look for such a
notice.
You may add additional accurate notices of copyright ownership.
Exhibit B - "Incompatible With Secondary Licenses" Notice
This Source Code Form is "Incompatible
With Secondary Licenses", as defined by
the Mozilla Public License, v. 2.0.

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# cleanhttp
Functions for accessing "clean" Go http.Client values
-------------
The Go standard library contains a default `http.Client` called
`http.DefaultClient`. It is a common idiom in Go code to start with
`http.DefaultClient` and tweak it as necessary, and in fact, this is
encouraged; from the `http` package documentation:
> The Client's Transport typically has internal state (cached TCP connections),
so Clients should be reused instead of created as needed. Clients are safe for
concurrent use by multiple goroutines.
Unfortunately, this is a shared value, and it is not uncommon for libraries to
assume that they are free to modify it at will. With enough dependencies, it
can be very easy to encounter strange problems and race conditions due to
manipulation of this shared value across libraries and goroutines (clients are
safe for concurrent use, but writing values to the client struct itself is not
protected).
Making things worse is the fact that a bare `http.Client` will use a default
`http.Transport` called `http.DefaultTransport`, which is another global value
that behaves the same way. So it is not simply enough to replace
`http.DefaultClient` with `&http.Client{}`.
This repository provides some simple functions to get a "clean" `http.Client`
-- one that uses the same default values as the Go standard library, but
returns a client that does not share any state with other clients.

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package cleanhttp
import (
"net"
"net/http"
"runtime"
"time"
)
// DefaultTransport returns a new http.Transport with similar default values to
// http.DefaultTransport, but with idle connections and keepalives disabled.
func DefaultTransport() *http.Transport {
transport := DefaultPooledTransport()
transport.DisableKeepAlives = true
transport.MaxIdleConnsPerHost = -1
return transport
}
// DefaultPooledTransport returns a new http.Transport with similar default
// values to http.DefaultTransport. Do not use this for transient transports as
// it can leak file descriptors over time. Only use this for transports that
// will be re-used for the same host(s).
func DefaultPooledTransport() *http.Transport {
transport := &http.Transport{
Proxy: http.ProxyFromEnvironment,
DialContext: (&net.Dialer{
Timeout: 30 * time.Second,
KeepAlive: 30 * time.Second,
DualStack: true,
}).DialContext,
MaxIdleConns: 100,
IdleConnTimeout: 90 * time.Second,
TLSHandshakeTimeout: 10 * time.Second,
ExpectContinueTimeout: 1 * time.Second,
MaxIdleConnsPerHost: runtime.GOMAXPROCS(0) + 1,
}
return transport
}
// DefaultClient returns a new http.Client with similar default values to
// http.Client, but with a non-shared Transport, idle connections disabled, and
// keepalives disabled.
func DefaultClient() *http.Client {
return &http.Client{
Transport: DefaultTransport(),
}
}
// DefaultPooledClient returns a new http.Client with similar default values to
// http.Client, but with a shared Transport. Do not use this function for
// transient clients as it can leak file descriptors over time. Only use this
// for clients that will be re-used for the same host(s).
func DefaultPooledClient() *http.Client {
return &http.Client{
Transport: DefaultPooledTransport(),
}
}

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// Package cleanhttp offers convenience utilities for acquiring "clean"
// http.Transport and http.Client structs.
//
// Values set on http.DefaultClient and http.DefaultTransport affect all
// callers. This can have detrimental effects, esepcially in TLS contexts,
// where client or root certificates set to talk to multiple endpoints can end
// up displacing each other, leading to hard-to-debug issues. This package
// provides non-shared http.Client and http.Transport structs to ensure that
// the configuration will not be overwritten by other parts of the application
// or dependencies.
//
// The DefaultClient and DefaultTransport functions disable idle connections
// and keepalives. Without ensuring that idle connections are closed before
// garbage collection, short-term clients/transports can leak file descriptors,
// eventually leading to "too many open files" errors. If you will be
// connecting to the same hosts repeatedly from the same client, you can use
// DefaultPooledClient to receive a client that has connection pooling
// semantics similar to http.DefaultClient.
//
package cleanhttp

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module github.com/hashicorp/go-cleanhttp

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package cleanhttp
import (
"net/http"
"strings"
"unicode"
)
// HandlerInput provides input options to cleanhttp's handlers
type HandlerInput struct {
ErrStatus int
}
// PrintablePathCheckHandler is a middleware that ensures the request path
// contains only printable runes.
func PrintablePathCheckHandler(next http.Handler, input *HandlerInput) http.Handler {
// Nil-check on input to make it optional
if input == nil {
input = &HandlerInput{
ErrStatus: http.StatusBadRequest,
}
}
// Default to http.StatusBadRequest on error
if input.ErrStatus == 0 {
input.ErrStatus = http.StatusBadRequest
}
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r != nil {
// Check URL path for non-printable characters
idx := strings.IndexFunc(r.URL.Path, func(c rune) bool {
return !unicode.IsPrint(c)
})
if idx != -1 {
w.WriteHeader(input.ErrStatus)
return
}
if next != nil {
next.ServeHTTP(w, r)
}
}
return
})
}

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.idea*

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MIT License
Copyright (c) 2017 HashiCorp
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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# go-hclog
[![Go Documentation](http://img.shields.io/badge/go-documentation-blue.svg?style=flat-square)][godocs]
[godocs]: https://godoc.org/github.com/hashicorp/go-hclog
`go-hclog` is a package for Go that provides a simple key/value logging
interface for use in development and production environments.
It provides logging levels that provide decreased output based upon the
desired amount of output, unlike the standard library `log` package.
It provides `Printf` style logging of values via `hclog.Fmt()`.
It provides a human readable output mode for use in development as well as
JSON output mode for production.
## Stability Note
While this library is fully open source and HashiCorp will be maintaining it
(since we are and will be making extensive use of it), the API and output
format is subject to minor changes as we fully bake and vet it in our projects.
This notice will be removed once it's fully integrated into our major projects
and no further changes are anticipated.
## Installation and Docs
Install using `go get github.com/hashicorp/go-hclog`.
Full documentation is available at
http://godoc.org/github.com/hashicorp/go-hclog
## Usage
### Use the global logger
```go
hclog.Default().Info("hello world")
```
```text
2017-07-05T16:15:55.167-0700 [INFO ] hello world
```
(Note timestamps are removed in future examples for brevity.)
### Create a new logger
```go
appLogger := hclog.New(&hclog.LoggerOptions{
Name: "my-app",
Level: hclog.LevelFromString("DEBUG"),
})
```
### Emit an Info level message with 2 key/value pairs
```go
input := "5.5"
_, err := strconv.ParseInt(input, 10, 32)
if err != nil {
appLogger.Info("Invalid input for ParseInt", "input", input, "error", err)
}
```
```text
... [INFO ] my-app: Invalid input for ParseInt: input=5.5 error="strconv.ParseInt: parsing "5.5": invalid syntax"
```
### Create a new Logger for a major subsystem
```go
subsystemLogger := appLogger.Named("transport")
subsystemLogger.Info("we are transporting something")
```
```text
... [INFO ] my-app.transport: we are transporting something
```
Notice that logs emitted by `subsystemLogger` contain `my-app.transport`,
reflecting both the application and subsystem names.
### Create a new Logger with fixed key/value pairs
Using `With()` will include a specific key-value pair in all messages emitted
by that logger.
```go
requestID := "5fb446b6-6eba-821d-df1b-cd7501b6a363"
requestLogger := subsystemLogger.With("request", requestID)
requestLogger.Info("we are transporting a request")
```
```text
... [INFO ] my-app.transport: we are transporting a request: request=5fb446b6-6eba-821d-df1b-cd7501b6a363
```
This allows sub Loggers to be context specific without having to thread that
into all the callers.
### Using `hclog.Fmt()`
```go
var int totalBandwidth = 200
appLogger.Info("total bandwidth exceeded", "bandwidth", hclog.Fmt("%d GB/s", totalBandwidth))
```
```text
... [INFO ] my-app: total bandwidth exceeded: bandwidth="200 GB/s"
```
### Use this with code that uses the standard library logger
If you want to use the standard library's `log.Logger` interface you can wrap
`hclog.Logger` by calling the `StandardLogger()` method. This allows you to use
it with the familiar `Println()`, `Printf()`, etc. For example:
```go
stdLogger := appLogger.StandardLogger(&hclog.StandardLoggerOptions{
InferLevels: true,
})
// Printf() is provided by stdlib log.Logger interface, not hclog.Logger
stdLogger.Printf("[DEBUG] %+v", stdLogger)
```
```text
... [DEBUG] my-app: &{mu:{state:0 sema:0} prefix: flag:0 out:0xc42000a0a0 buf:[]}
```
Alternatively, you may configure the system-wide logger:
```go
// log the standard logger from 'import "log"'
log.SetOutput(appLogger.StandardWriter(&hclog.StandardLoggerOptions{InferLevels: true}))
log.SetPrefix("")
log.SetFlags(0)
log.Printf("[DEBUG] %d", 42)
```
```text
... [DEBUG] my-app: 42
```
Notice that if `appLogger` is initialized with the `INFO` log level _and_ you
specify `InferLevels: true`, you will not see any output here. You must change
`appLogger` to `DEBUG` to see output. See the docs for more information.

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// +build !windows
package hclog
import (
"github.com/mattn/go-isatty"
)
// setColorization will mutate the values of this logger
// to approperately configure colorization options. It provides
// a wrapper to the output stream on Windows systems.
func (l *intLogger) setColorization(opts *LoggerOptions) {
switch opts.Color {
case ColorOff:
fallthrough
case ForceColor:
return
case AutoColor:
fi := l.checkWriterIsFile()
isUnixTerm := isatty.IsTerminal(fi.Fd())
isCygwinTerm := isatty.IsCygwinTerminal(fi.Fd())
isTerm := isUnixTerm || isCygwinTerm
if !isTerm {
l.writer.color = ColorOff
}
}
}

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// +build windows
package hclog
import (
"os"
colorable "github.com/mattn/go-colorable"
"github.com/mattn/go-isatty"
)
// setColorization will mutate the values of this logger
// to approperately configure colorization options. It provides
// a wrapper to the output stream on Windows systems.
func (l *intLogger) setColorization(opts *LoggerOptions) {
switch opts.Color {
case ColorOff:
return
case ForceColor:
fi := l.checkWriterIsFile()
l.writer.w = colorable.NewColorable(fi)
case AutoColor:
fi := l.checkWriterIsFile()
isUnixTerm := isatty.IsTerminal(os.Stdout.Fd())
isCygwinTerm := isatty.IsCygwinTerminal(os.Stdout.Fd())
isTerm := isUnixTerm || isCygwinTerm
if !isTerm {
l.writer.color = ColorOff
return
}
l.writer.w = colorable.NewColorable(fi)
}
}

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package hclog
import (
"context"
)
// WithContext inserts a logger into the context and is retrievable
// with FromContext. The optional args can be set with the same syntax as
// Logger.With to set fields on the inserted logger. This will not modify
// the logger argument in-place.
func WithContext(ctx context.Context, logger Logger, args ...interface{}) context.Context {
// While we could call logger.With even with zero args, we have this
// check to avoid unnecessary allocations around creating a copy of a
// logger.
if len(args) > 0 {
logger = logger.With(args...)
}
return context.WithValue(ctx, contextKey, logger)
}
// FromContext returns a logger from the context. This will return L()
// (the default logger) if no logger is found in the context. Therefore,
// this will never return a nil value.
func FromContext(ctx context.Context) Logger {
logger, _ := ctx.Value(contextKey).(Logger)
if logger == nil {
return L()
}
return logger
}
// Unexported new type so that our context key never collides with another.
type contextKeyType struct{}
// contextKey is the key used for the context to store the logger.
var contextKey = contextKeyType{}

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package hclog
import (
"regexp"
"strings"
)
// ExcludeByMessage provides a simple way to build a list of log messages that
// can be queried and matched. This is meant to be used with the Exclude
// option on Options to suppress log messages. This does not hold any mutexs
// within itself, so normal usage would be to Add entries at setup and none after
// Exclude is going to be called. Exclude is called with a mutex held within
// the Logger, so that doesn't need to use a mutex. Example usage:
//
// f := new(ExcludeByMessage)
// f.Add("Noisy log message text")
// appLogger.Exclude = f.Exclude
type ExcludeByMessage struct {
messages map[string]struct{}
}
// Add a message to be filtered. Do not call this after Exclude is to be called
// due to concurrency issues.
func (f *ExcludeByMessage) Add(msg string) {
if f.messages == nil {
f.messages = make(map[string]struct{})
}
f.messages[msg] = struct{}{}
}
// Return true if the given message should be included
func (f *ExcludeByMessage) Exclude(level Level, msg string, args ...interface{}) bool {
_, ok := f.messages[msg]
return ok
}
// ExcludeByPrefix is a simple type to match a message string that has a common prefix.
type ExcludeByPrefix string
// Matches an message that starts with the prefix.
func (p ExcludeByPrefix) Exclude(level Level, msg string, args ...interface{}) bool {
return strings.HasPrefix(msg, string(p))
}
// ExcludeByRegexp takes a regexp and uses it to match a log message string. If it matches
// the log entry is excluded.
type ExcludeByRegexp struct {
Regexp *regexp.Regexp
}
// Exclude the log message if the message string matches the regexp
func (e ExcludeByRegexp) Exclude(level Level, msg string, args ...interface{}) bool {
return e.Regexp.MatchString(msg)
}
// ExcludeFuncs is a slice of functions that will called to see if a log entry
// should be filtered or not. It stops calling functions once at least one returns
// true.
type ExcludeFuncs []func(level Level, msg string, args ...interface{}) bool
// Calls each function until one of them returns true
func (ff ExcludeFuncs) Exclude(level Level, msg string, args ...interface{}) bool {
for _, f := range ff {
if f(level, msg, args...) {
return true
}
}
return false
}

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package hclog
import (
"sync"
)
var (
protect sync.Once
def Logger
// DefaultOptions is used to create the Default logger. These are read
// only when the Default logger is created, so set them as soon as the
// process starts.
DefaultOptions = &LoggerOptions{
Level: DefaultLevel,
Output: DefaultOutput,
}
)
// Default returns a globally held logger. This can be a good starting
// place, and then you can use .With() and .Name() to create sub-loggers
// to be used in more specific contexts.
// The value of the Default logger can be set via SetDefault() or by
// changing the options in DefaultOptions.
//
// This method is goroutine safe, returning a global from memory, but
// cause should be used if SetDefault() is called it random times
// in the program as that may result in race conditions and an unexpected
// Logger being returned.
func Default() Logger {
protect.Do(func() {
// If SetDefault was used before Default() was called, we need to
// detect that here.
if def == nil {
def = New(DefaultOptions)
}
})
return def
}
// L is a short alias for Default().
func L() Logger {
return Default()
}
// SetDefault changes the logger to be returned by Default()and L()
// to the one given. This allows packages to use the default logger
// and have higher level packages change it to match the execution
// environment. It returns any old default if there is one.
//
// NOTE: This is expected to be called early in the program to setup
// a default logger. As such, it does not attempt to make itself
// not racy with regard to the value of the default logger. Ergo
// if it is called in goroutines, you may experience race conditions
// with other goroutines retrieving the default logger. Basically,
// don't do that.
func SetDefault(log Logger) Logger {
old := def
def = log
return old
}

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module github.com/hashicorp/go-hclog
require (
github.com/davecgh/go-spew v1.1.1 // indirect
github.com/fatih/color v1.7.0
github.com/mattn/go-colorable v0.1.4
github.com/mattn/go-isatty v0.0.10
github.com/pmezard/go-difflib v1.0.0 // indirect
github.com/stretchr/testify v1.2.2
)
go 1.13

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github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/fatih/color v1.7.0 h1:DkWD4oS2D8LGGgTQ6IvwJJXSL5Vp2ffcQg58nFV38Ys=
github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
github.com/mattn/go-colorable v0.1.4 h1:snbPLB8fVfU9iwbbo30TPtbLRzwWu6aJS6Xh4eaaviA=
github.com/mattn/go-colorable v0.1.4/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVcfRqFIhoBtE=
github.com/mattn/go-isatty v0.0.8 h1:HLtExJ+uU2HOZ+wI0Tt5DtUDrx8yhUqDcp7fYERX4CE=
github.com/mattn/go-isatty v0.0.8/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hdxcsrc5s=
github.com/mattn/go-isatty v0.0.10 h1:qxFzApOv4WsAL965uUPIsXzAKCZxN2p9UqdhFS4ZW10=
github.com/mattn/go-isatty v0.0.10/go.mod h1:qgIWMr58cqv1PHHyhnkY9lrL7etaEgOFcMEpPG5Rm84=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223 h1:DH4skfRX4EBpamg7iV4ZlCpblAHI6s6TDM39bFZumv8=
golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20191008105621-543471e840be h1:QAcqgptGM8IQBC9K/RC4o+O9YmqEm0diQn9QmZw/0mU=
golang.org/x/sys v0.0.0-20191008105621-543471e840be/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=

246
vendor/github.com/hashicorp/go-hclog/interceptlogger.go generated vendored Normal file
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package hclog
import (
"io"
"log"
"sync"
"sync/atomic"
)
var _ Logger = &interceptLogger{}
type interceptLogger struct {
Logger
mu *sync.Mutex
sinkCount *int32
Sinks map[SinkAdapter]struct{}
}
func NewInterceptLogger(opts *LoggerOptions) InterceptLogger {
intercept := &interceptLogger{
Logger: New(opts),
mu: new(sync.Mutex),
sinkCount: new(int32),
Sinks: make(map[SinkAdapter]struct{}),
}
atomic.StoreInt32(intercept.sinkCount, 0)
return intercept
}
func (i *interceptLogger) Log(level Level, msg string, args ...interface{}) {
i.Logger.Log(level, msg, args...)
if atomic.LoadInt32(i.sinkCount) == 0 {
return
}
i.mu.Lock()
defer i.mu.Unlock()
for s := range i.Sinks {
s.Accept(i.Name(), level, msg, i.retrieveImplied(args...)...)
}
}
// Emit the message and args at TRACE level to log and sinks
func (i *interceptLogger) Trace(msg string, args ...interface{}) {
i.Logger.Trace(msg, args...)
if atomic.LoadInt32(i.sinkCount) == 0 {
return
}
i.mu.Lock()
defer i.mu.Unlock()
for s := range i.Sinks {
s.Accept(i.Name(), Trace, msg, i.retrieveImplied(args...)...)
}
}
// Emit the message and args at DEBUG level to log and sinks
func (i *interceptLogger) Debug(msg string, args ...interface{}) {
i.Logger.Debug(msg, args...)
if atomic.LoadInt32(i.sinkCount) == 0 {
return
}
i.mu.Lock()
defer i.mu.Unlock()
for s := range i.Sinks {
s.Accept(i.Name(), Debug, msg, i.retrieveImplied(args...)...)
}
}
// Emit the message and args at INFO level to log and sinks
func (i *interceptLogger) Info(msg string, args ...interface{}) {
i.Logger.Info(msg, args...)
if atomic.LoadInt32(i.sinkCount) == 0 {
return
}
i.mu.Lock()
defer i.mu.Unlock()
for s := range i.Sinks {
s.Accept(i.Name(), Info, msg, i.retrieveImplied(args...)...)
}
}
// Emit the message and args at WARN level to log and sinks
func (i *interceptLogger) Warn(msg string, args ...interface{}) {
i.Logger.Warn(msg, args...)
if atomic.LoadInt32(i.sinkCount) == 0 {
return
}
i.mu.Lock()
defer i.mu.Unlock()
for s := range i.Sinks {
s.Accept(i.Name(), Warn, msg, i.retrieveImplied(args...)...)
}
}
// Emit the message and args at ERROR level to log and sinks
func (i *interceptLogger) Error(msg string, args ...interface{}) {
i.Logger.Error(msg, args...)
if atomic.LoadInt32(i.sinkCount) == 0 {
return
}
i.mu.Lock()
defer i.mu.Unlock()
for s := range i.Sinks {
s.Accept(i.Name(), Error, msg, i.retrieveImplied(args...)...)
}
}
func (i *interceptLogger) retrieveImplied(args ...interface{}) []interface{} {
top := i.Logger.ImpliedArgs()
cp := make([]interface{}, len(top)+len(args))
copy(cp, top)
copy(cp[len(top):], args)
return cp
}
// Create a new sub-Logger that a name decending from the current name.
// This is used to create a subsystem specific Logger.
// Registered sinks will subscribe to these messages as well.
func (i *interceptLogger) Named(name string) Logger {
var sub interceptLogger
sub = *i
sub.Logger = i.Logger.Named(name)
return &sub
}
// Create a new sub-Logger with an explicit name. This ignores the current
// name. This is used to create a standalone logger that doesn't fall
// within the normal hierarchy. Registered sinks will subscribe
// to these messages as well.
func (i *interceptLogger) ResetNamed(name string) Logger {
var sub interceptLogger
sub = *i
sub.Logger = i.Logger.ResetNamed(name)
return &sub
}
// Create a new sub-Logger that a name decending from the current name.
// This is used to create a subsystem specific Logger.
// Registered sinks will subscribe to these messages as well.
func (i *interceptLogger) NamedIntercept(name string) InterceptLogger {
var sub interceptLogger
sub = *i
sub.Logger = i.Logger.Named(name)
return &sub
}
// Create a new sub-Logger with an explicit name. This ignores the current
// name. This is used to create a standalone logger that doesn't fall
// within the normal hierarchy. Registered sinks will subscribe
// to these messages as well.
func (i *interceptLogger) ResetNamedIntercept(name string) InterceptLogger {
var sub interceptLogger
sub = *i
sub.Logger = i.Logger.ResetNamed(name)
return &sub
}
// Return a sub-Logger for which every emitted log message will contain
// the given key/value pairs. This is used to create a context specific
// Logger.
func (i *interceptLogger) With(args ...interface{}) Logger {
var sub interceptLogger
sub = *i
sub.Logger = i.Logger.With(args...)
return &sub
}
// RegisterSink attaches a SinkAdapter to interceptLoggers sinks.
func (i *interceptLogger) RegisterSink(sink SinkAdapter) {
i.mu.Lock()
defer i.mu.Unlock()
i.Sinks[sink] = struct{}{}
atomic.AddInt32(i.sinkCount, 1)
}
// DeregisterSink removes a SinkAdapter from interceptLoggers sinks.
func (i *interceptLogger) DeregisterSink(sink SinkAdapter) {
i.mu.Lock()
defer i.mu.Unlock()
delete(i.Sinks, sink)
atomic.AddInt32(i.sinkCount, -1)
}
// Create a *log.Logger that will send it's data through this Logger. This
// allows packages that expect to be using the standard library to log to
// actually use this logger, which will also send to any registered sinks.
func (i *interceptLogger) StandardLoggerIntercept(opts *StandardLoggerOptions) *log.Logger {
if opts == nil {
opts = &StandardLoggerOptions{}
}
return log.New(i.StandardWriterIntercept(opts), "", 0)
}
func (i *interceptLogger) StandardWriterIntercept(opts *StandardLoggerOptions) io.Writer {
return &stdlogAdapter{
log: i,
inferLevels: opts.InferLevels,
forceLevel: opts.ForceLevel,
}
}
func (i *interceptLogger) ResetOutput(opts *LoggerOptions) error {
if or, ok := i.Logger.(OutputResettable); ok {
return or.ResetOutput(opts)
} else {
return nil
}
}
func (i *interceptLogger) ResetOutputWithFlush(opts *LoggerOptions, flushable Flushable) error {
if or, ok := i.Logger.(OutputResettable); ok {
return or.ResetOutputWithFlush(opts, flushable)
} else {
return nil
}
}

665
vendor/github.com/hashicorp/go-hclog/intlogger.go generated vendored Normal file
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package hclog
import (
"bytes"
"encoding"
"encoding/json"
"errors"
"fmt"
"io"
"log"
"os"
"reflect"
"regexp"
"runtime"
"sort"
"strconv"
"strings"
"sync"
"sync/atomic"
"time"
"github.com/fatih/color"
)
// TimeFormat to use for logging. This is a version of RFC3339 that contains
// contains millisecond precision
const TimeFormat = "2006-01-02T15:04:05.000Z0700"
// errJsonUnsupportedTypeMsg is included in log json entries, if an arg cannot be serialized to json
const errJsonUnsupportedTypeMsg = "logging contained values that don't serialize to json"
var (
_levelToBracket = map[Level]string{
Debug: "[DEBUG]",
Trace: "[TRACE]",
Info: "[INFO] ",
Warn: "[WARN] ",
Error: "[ERROR]",
}
_levelToColor = map[Level]*color.Color{
Debug: color.New(color.FgHiWhite),
Trace: color.New(color.FgHiGreen),
Info: color.New(color.FgHiBlue),
Warn: color.New(color.FgHiYellow),
Error: color.New(color.FgHiRed),
}
)
// Make sure that intLogger is a Logger
var _ Logger = &intLogger{}
// intLogger is an internal logger implementation. Internal in that it is
// defined entirely by this package.
type intLogger struct {
json bool
caller bool
name string
timeFormat string
// This is an interface so that it's shared by any derived loggers, since
// those derived loggers share the bufio.Writer as well.
mutex Locker
writer *writer
level *int32
implied []interface{}
exclude func(level Level, msg string, args ...interface{}) bool
}
// New returns a configured logger.
func New(opts *LoggerOptions) Logger {
return newLogger(opts)
}
// NewSinkAdapter returns a SinkAdapter with configured settings
// defined by LoggerOptions
func NewSinkAdapter(opts *LoggerOptions) SinkAdapter {
return newLogger(opts)
}
func newLogger(opts *LoggerOptions) *intLogger {
if opts == nil {
opts = &LoggerOptions{}
}
output := opts.Output
if output == nil {
output = DefaultOutput
}
level := opts.Level
if level == NoLevel {
level = DefaultLevel
}
mutex := opts.Mutex
if mutex == nil {
mutex = new(sync.Mutex)
}
l := &intLogger{
json: opts.JSONFormat,
caller: opts.IncludeLocation,
name: opts.Name,
timeFormat: TimeFormat,
mutex: mutex,
writer: newWriter(output, opts.Color),
level: new(int32),
exclude: opts.Exclude,
}
l.setColorization(opts)
if opts.DisableTime {
l.timeFormat = ""
} else if opts.TimeFormat != "" {
l.timeFormat = opts.TimeFormat
}
atomic.StoreInt32(l.level, int32(level))
return l
}
// Log a message and a set of key/value pairs if the given level is at
// or more severe that the threshold configured in the Logger.
func (l *intLogger) log(name string, level Level, msg string, args ...interface{}) {
if level < Level(atomic.LoadInt32(l.level)) {
return
}
t := time.Now()
l.mutex.Lock()
defer l.mutex.Unlock()
if l.exclude != nil && l.exclude(level, msg, args...) {
return
}
if l.json {
l.logJSON(t, name, level, msg, args...)
} else {
l.logPlain(t, name, level, msg, args...)
}
l.writer.Flush(level)
}
// Cleanup a path by returning the last 2 segments of the path only.
func trimCallerPath(path string) string {
// lovely borrowed from zap
// nb. To make sure we trim the path correctly on Windows too, we
// counter-intuitively need to use '/' and *not* os.PathSeparator here,
// because the path given originates from Go stdlib, specifically
// runtime.Caller() which (as of Mar/17) returns forward slashes even on
// Windows.
//
// See https://github.com/golang/go/issues/3335
// and https://github.com/golang/go/issues/18151
//
// for discussion on the issue on Go side.
// Find the last separator.
idx := strings.LastIndexByte(path, '/')
if idx == -1 {
return path
}
// Find the penultimate separator.
idx = strings.LastIndexByte(path[:idx], '/')
if idx == -1 {
return path
}
return path[idx+1:]
}
var logImplFile = regexp.MustCompile(`.+intlogger.go|.+interceptlogger.go$`)
// Non-JSON logging format function
func (l *intLogger) logPlain(t time.Time, name string, level Level, msg string, args ...interface{}) {
if len(l.timeFormat) > 0 {
l.writer.WriteString(t.Format(l.timeFormat))
l.writer.WriteByte(' ')
}
s, ok := _levelToBracket[level]
if ok {
l.writer.WriteString(s)
} else {
l.writer.WriteString("[?????]")
}
offset := 3
if l.caller {
// Check if the caller is inside our package and inside
// a logger implementation file
if _, file, _, ok := runtime.Caller(3); ok {
match := logImplFile.MatchString(file)
if match {
offset = 4
}
}
if _, file, line, ok := runtime.Caller(offset); ok {
l.writer.WriteByte(' ')
l.writer.WriteString(trimCallerPath(file))
l.writer.WriteByte(':')
l.writer.WriteString(strconv.Itoa(line))
l.writer.WriteByte(':')
}
}
l.writer.WriteByte(' ')
if name != "" {
l.writer.WriteString(name)
l.writer.WriteString(": ")
}
l.writer.WriteString(msg)
args = append(l.implied, args...)
var stacktrace CapturedStacktrace
if args != nil && len(args) > 0 {
if len(args)%2 != 0 {
cs, ok := args[len(args)-1].(CapturedStacktrace)
if ok {
args = args[:len(args)-1]
stacktrace = cs
} else {
extra := args[len(args)-1]
args = append(args[:len(args)-1], MissingKey, extra)
}
}
l.writer.WriteByte(':')
FOR:
for i := 0; i < len(args); i = i + 2 {
var (
val string
raw bool
)
switch st := args[i+1].(type) {
case string:
val = st
case int:
val = strconv.FormatInt(int64(st), 10)
case int64:
val = strconv.FormatInt(int64(st), 10)
case int32:
val = strconv.FormatInt(int64(st), 10)
case int16:
val = strconv.FormatInt(int64(st), 10)
case int8:
val = strconv.FormatInt(int64(st), 10)
case uint:
val = strconv.FormatUint(uint64(st), 10)
case uint64:
val = strconv.FormatUint(uint64(st), 10)
case uint32:
val = strconv.FormatUint(uint64(st), 10)
case uint16:
val = strconv.FormatUint(uint64(st), 10)
case uint8:
val = strconv.FormatUint(uint64(st), 10)
case Hex:
val = "0x" + strconv.FormatUint(uint64(st), 16)
case Octal:
val = "0" + strconv.FormatUint(uint64(st), 8)
case Binary:
val = "0b" + strconv.FormatUint(uint64(st), 2)
case CapturedStacktrace:
stacktrace = st
continue FOR
case Format:
val = fmt.Sprintf(st[0].(string), st[1:]...)
default:
v := reflect.ValueOf(st)
if v.Kind() == reflect.Slice {
val = l.renderSlice(v)
raw = true
} else {
val = fmt.Sprintf("%v", st)
}
}
l.writer.WriteByte(' ')
switch st := args[i].(type) {
case string:
l.writer.WriteString(st)
default:
l.writer.WriteString(fmt.Sprintf("%s", st))
}
l.writer.WriteByte('=')
if !raw && strings.ContainsAny(val, " \t\n\r") {
l.writer.WriteByte('"')
l.writer.WriteString(val)
l.writer.WriteByte('"')
} else {
l.writer.WriteString(val)
}
}
}
l.writer.WriteString("\n")
if stacktrace != "" {
l.writer.WriteString(string(stacktrace))
}
}
func (l *intLogger) renderSlice(v reflect.Value) string {
var buf bytes.Buffer
buf.WriteRune('[')
for i := 0; i < v.Len(); i++ {
if i > 0 {
buf.WriteString(", ")
}
sv := v.Index(i)
var val string
switch sv.Kind() {
case reflect.String:
val = sv.String()
case reflect.Int, reflect.Int16, reflect.Int32, reflect.Int64:
val = strconv.FormatInt(sv.Int(), 10)
case reflect.Uint, reflect.Uint16, reflect.Uint32, reflect.Uint64:
val = strconv.FormatUint(sv.Uint(), 10)
default:
val = fmt.Sprintf("%v", sv.Interface())
}
if strings.ContainsAny(val, " \t\n\r") {
buf.WriteByte('"')
buf.WriteString(val)
buf.WriteByte('"')
} else {
buf.WriteString(val)
}
}
buf.WriteRune(']')
return buf.String()
}
// JSON logging function
func (l *intLogger) logJSON(t time.Time, name string, level Level, msg string, args ...interface{}) {
vals := l.jsonMapEntry(t, name, level, msg)
args = append(l.implied, args...)
if args != nil && len(args) > 0 {
if len(args)%2 != 0 {
cs, ok := args[len(args)-1].(CapturedStacktrace)
if ok {
args = args[:len(args)-1]
vals["stacktrace"] = cs
} else {
extra := args[len(args)-1]
args = append(args[:len(args)-1], MissingKey, extra)
}
}
for i := 0; i < len(args); i = i + 2 {
val := args[i+1]
switch sv := val.(type) {
case error:
// Check if val is of type error. If error type doesn't
// implement json.Marshaler or encoding.TextMarshaler
// then set val to err.Error() so that it gets marshaled
switch sv.(type) {
case json.Marshaler, encoding.TextMarshaler:
default:
val = sv.Error()
}
case Format:
val = fmt.Sprintf(sv[0].(string), sv[1:]...)
}
var key string
switch st := args[i].(type) {
case string:
key = st
default:
key = fmt.Sprintf("%s", st)
}
vals[key] = val
}
}
err := json.NewEncoder(l.writer).Encode(vals)
if err != nil {
if _, ok := err.(*json.UnsupportedTypeError); ok {
plainVal := l.jsonMapEntry(t, name, level, msg)
plainVal["@warn"] = errJsonUnsupportedTypeMsg
json.NewEncoder(l.writer).Encode(plainVal)
}
}
}
func (l intLogger) jsonMapEntry(t time.Time, name string, level Level, msg string) map[string]interface{} {
vals := map[string]interface{}{
"@message": msg,
"@timestamp": t.Format("2006-01-02T15:04:05.000000Z07:00"),
}
var levelStr string
switch level {
case Error:
levelStr = "error"
case Warn:
levelStr = "warn"
case Info:
levelStr = "info"
case Debug:
levelStr = "debug"
case Trace:
levelStr = "trace"
default:
levelStr = "all"
}
vals["@level"] = levelStr
if name != "" {
vals["@module"] = name
}
if l.caller {
if _, file, line, ok := runtime.Caller(4); ok {
vals["@caller"] = fmt.Sprintf("%s:%d", file, line)
}
}
return vals
}
// Emit the message and args at the provided level
func (l *intLogger) Log(level Level, msg string, args ...interface{}) {
l.log(l.Name(), level, msg, args...)
}
// Emit the message and args at DEBUG level
func (l *intLogger) Debug(msg string, args ...interface{}) {
l.log(l.Name(), Debug, msg, args...)
}
// Emit the message and args at TRACE level
func (l *intLogger) Trace(msg string, args ...interface{}) {
l.log(l.Name(), Trace, msg, args...)
}
// Emit the message and args at INFO level
func (l *intLogger) Info(msg string, args ...interface{}) {
l.log(l.Name(), Info, msg, args...)
}
// Emit the message and args at WARN level
func (l *intLogger) Warn(msg string, args ...interface{}) {
l.log(l.Name(), Warn, msg, args...)
}
// Emit the message and args at ERROR level
func (l *intLogger) Error(msg string, args ...interface{}) {
l.log(l.Name(), Error, msg, args...)
}
// Indicate that the logger would emit TRACE level logs
func (l *intLogger) IsTrace() bool {
return Level(atomic.LoadInt32(l.level)) == Trace
}
// Indicate that the logger would emit DEBUG level logs
func (l *intLogger) IsDebug() bool {
return Level(atomic.LoadInt32(l.level)) <= Debug
}
// Indicate that the logger would emit INFO level logs
func (l *intLogger) IsInfo() bool {
return Level(atomic.LoadInt32(l.level)) <= Info
}
// Indicate that the logger would emit WARN level logs
func (l *intLogger) IsWarn() bool {
return Level(atomic.LoadInt32(l.level)) <= Warn
}
// Indicate that the logger would emit ERROR level logs
func (l *intLogger) IsError() bool {
return Level(atomic.LoadInt32(l.level)) <= Error
}
const MissingKey = "EXTRA_VALUE_AT_END"
// Return a sub-Logger for which every emitted log message will contain
// the given key/value pairs. This is used to create a context specific
// Logger.
func (l *intLogger) With(args ...interface{}) Logger {
var extra interface{}
if len(args)%2 != 0 {
extra = args[len(args)-1]
args = args[:len(args)-1]
}
sl := *l
result := make(map[string]interface{}, len(l.implied)+len(args))
keys := make([]string, 0, len(l.implied)+len(args))
// Read existing args, store map and key for consistent sorting
for i := 0; i < len(l.implied); i += 2 {
key := l.implied[i].(string)
keys = append(keys, key)
result[key] = l.implied[i+1]
}
// Read new args, store map and key for consistent sorting
for i := 0; i < len(args); i += 2 {
key := args[i].(string)
_, exists := result[key]
if !exists {
keys = append(keys, key)
}
result[key] = args[i+1]
}
// Sort keys to be consistent
sort.Strings(keys)
sl.implied = make([]interface{}, 0, len(l.implied)+len(args))
for _, k := range keys {
sl.implied = append(sl.implied, k)
sl.implied = append(sl.implied, result[k])
}
if extra != nil {
sl.implied = append(sl.implied, MissingKey, extra)
}
return &sl
}
// Create a new sub-Logger that a name decending from the current name.
// This is used to create a subsystem specific Logger.
func (l *intLogger) Named(name string) Logger {
sl := *l
if sl.name != "" {
sl.name = sl.name + "." + name
} else {
sl.name = name
}
return &sl
}
// Create a new sub-Logger with an explicit name. This ignores the current
// name. This is used to create a standalone logger that doesn't fall
// within the normal hierarchy.
func (l *intLogger) ResetNamed(name string) Logger {
sl := *l
sl.name = name
return &sl
}
func (l *intLogger) ResetOutput(opts *LoggerOptions) error {
if opts.Output == nil {
return errors.New("given output is nil")
}
l.mutex.Lock()
defer l.mutex.Unlock()
return l.resetOutput(opts)
}
func (l *intLogger) ResetOutputWithFlush(opts *LoggerOptions, flushable Flushable) error {
if opts.Output == nil {
return errors.New("given output is nil")
}
if flushable == nil {
return errors.New("flushable is nil")
}
l.mutex.Lock()
defer l.mutex.Unlock()
if err := flushable.Flush(); err != nil {
return err
}
return l.resetOutput(opts)
}
func (l *intLogger) resetOutput(opts *LoggerOptions) error {
l.writer = newWriter(opts.Output, opts.Color)
l.setColorization(opts)
return nil
}
// Update the logging level on-the-fly. This will affect all subloggers as
// well.
func (l *intLogger) SetLevel(level Level) {
atomic.StoreInt32(l.level, int32(level))
}
// Create a *log.Logger that will send it's data through this Logger. This
// allows packages that expect to be using the standard library log to actually
// use this logger.
func (l *intLogger) StandardLogger(opts *StandardLoggerOptions) *log.Logger {
if opts == nil {
opts = &StandardLoggerOptions{}
}
return log.New(l.StandardWriter(opts), "", 0)
}
func (l *intLogger) StandardWriter(opts *StandardLoggerOptions) io.Writer {
return &stdlogAdapter{
log: l,
inferLevels: opts.InferLevels,
forceLevel: opts.ForceLevel,
}
}
// checks if the underlying io.Writer is a file, and
// panics if not. For use by colorization.
func (l *intLogger) checkWriterIsFile() *os.File {
fi, ok := l.writer.w.(*os.File)
if !ok {
panic("Cannot enable coloring of non-file Writers")
}
return fi
}
// Accept implements the SinkAdapter interface
func (i *intLogger) Accept(name string, level Level, msg string, args ...interface{}) {
i.log(name, level, msg, args...)
}
// ImpliedArgs returns the loggers implied args
func (i *intLogger) ImpliedArgs() []interface{} {
return i.implied
}
// Name returns the loggers name
func (i *intLogger) Name() string {
return i.name
}

327
vendor/github.com/hashicorp/go-hclog/logger.go generated vendored Normal file
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package hclog
import (
"io"
"log"
"os"
"strings"
)
var (
//DefaultOutput is used as the default log output.
DefaultOutput io.Writer = os.Stderr
// DefaultLevel is used as the default log level.
DefaultLevel = Info
)
// Level represents a log level.
type Level int32
const (
// NoLevel is a special level used to indicate that no level has been
// set and allow for a default to be used.
NoLevel Level = 0
// Trace is the most verbose level. Intended to be used for the tracing
// of actions in code, such as function enters/exits, etc.
Trace Level = 1
// Debug information for programmer lowlevel analysis.
Debug Level = 2
// Info information about steady state operations.
Info Level = 3
// Warn information about rare but handled events.
Warn Level = 4
// Error information about unrecoverable events.
Error Level = 5
)
// Format is a simple convience type for when formatting is required. When
// processing a value of this type, the logger automatically treats the first
// argument as a Printf formatting string and passes the rest as the values
// to be formatted. For example: L.Info(Fmt{"%d beans/day", beans}).
type Format []interface{}
// Fmt returns a Format type. This is a convience function for creating a Format
// type.
func Fmt(str string, args ...interface{}) Format {
return append(Format{str}, args...)
}
// A simple shortcut to format numbers in hex when displayed with the normal
// text output. For example: L.Info("header value", Hex(17))
type Hex int
// A simple shortcut to format numbers in octal when displayed with the normal
// text output. For example: L.Info("perms", Octal(17))
type Octal int
// A simple shortcut to format numbers in binary when displayed with the normal
// text output. For example: L.Info("bits", Binary(17))
type Binary int
// ColorOption expresses how the output should be colored, if at all.
type ColorOption uint8
const (
// ColorOff is the default coloration, and does not
// inject color codes into the io.Writer.
ColorOff ColorOption = iota
// AutoColor checks if the io.Writer is a tty,
// and if so enables coloring.
AutoColor
// ForceColor will enable coloring, regardless of whether
// the io.Writer is a tty or not.
ForceColor
)
// LevelFromString returns a Level type for the named log level, or "NoLevel" if
// the level string is invalid. This facilitates setting the log level via
// config or environment variable by name in a predictable way.
func LevelFromString(levelStr string) Level {
// We don't care about case. Accept both "INFO" and "info".
levelStr = strings.ToLower(strings.TrimSpace(levelStr))
switch levelStr {
case "trace":
return Trace
case "debug":
return Debug
case "info":
return Info
case "warn":
return Warn
case "error":
return Error
default:
return NoLevel
}
}
func (l Level) String() string {
switch l {
case Trace:
return "trace"
case Debug:
return "debug"
case Info:
return "info"
case Warn:
return "warn"
case Error:
return "error"
case NoLevel:
return "none"
default:
return "unknown"
}
}
// Logger describes the interface that must be implemeted by all loggers.
type Logger interface {
// Args are alternating key, val pairs
// keys must be strings
// vals can be any type, but display is implementation specific
// Emit a message and key/value pairs at a provided log level
Log(level Level, msg string, args ...interface{})
// Emit a message and key/value pairs at the TRACE level
Trace(msg string, args ...interface{})
// Emit a message and key/value pairs at the DEBUG level
Debug(msg string, args ...interface{})
// Emit a message and key/value pairs at the INFO level
Info(msg string, args ...interface{})
// Emit a message and key/value pairs at the WARN level
Warn(msg string, args ...interface{})
// Emit a message and key/value pairs at the ERROR level
Error(msg string, args ...interface{})
// Indicate if TRACE logs would be emitted. This and the other Is* guards
// are used to elide expensive logging code based on the current level.
IsTrace() bool
// Indicate if DEBUG logs would be emitted. This and the other Is* guards
IsDebug() bool
// Indicate if INFO logs would be emitted. This and the other Is* guards
IsInfo() bool
// Indicate if WARN logs would be emitted. This and the other Is* guards
IsWarn() bool
// Indicate if ERROR logs would be emitted. This and the other Is* guards
IsError() bool
// ImpliedArgs returns With key/value pairs
ImpliedArgs() []interface{}
// Creates a sublogger that will always have the given key/value pairs
With(args ...interface{}) Logger
// Returns the Name of the logger
Name() string
// Create a logger that will prepend the name string on the front of all messages.
// If the logger already has a name, the new value will be appended to the current
// name. That way, a major subsystem can use this to decorate all it's own logs
// without losing context.
Named(name string) Logger
// Create a logger that will prepend the name string on the front of all messages.
// This sets the name of the logger to the value directly, unlike Named which honor
// the current name as well.
ResetNamed(name string) Logger
// Updates the level. This should affect all sub-loggers as well. If an
// implementation cannot update the level on the fly, it should no-op.
SetLevel(level Level)
// Return a value that conforms to the stdlib log.Logger interface
StandardLogger(opts *StandardLoggerOptions) *log.Logger
// Return a value that conforms to io.Writer, which can be passed into log.SetOutput()
StandardWriter(opts *StandardLoggerOptions) io.Writer
}
// StandardLoggerOptions can be used to configure a new standard logger.
type StandardLoggerOptions struct {
// Indicate that some minimal parsing should be done on strings to try
// and detect their level and re-emit them.
// This supports the strings like [ERROR], [ERR] [TRACE], [WARN], [INFO],
// [DEBUG] and strip it off before reapplying it.
InferLevels bool
// ForceLevel is used to force all output from the standard logger to be at
// the specified level. Similar to InferLevels, this will strip any level
// prefix contained in the logged string before applying the forced level.
// If set, this override InferLevels.
ForceLevel Level
}
// LoggerOptions can be used to configure a new logger.
type LoggerOptions struct {
// Name of the subsystem to prefix logs with
Name string
// The threshold for the logger. Anything less severe is supressed
Level Level
// Where to write the logs to. Defaults to os.Stderr if nil
Output io.Writer
// An optional Locker in case Output is shared. This can be a sync.Mutex or
// a NoopLocker if the caller wants control over output, e.g. for batching
// log lines.
Mutex Locker
// Control if the output should be in JSON.
JSONFormat bool
// Include file and line information in each log line
IncludeLocation bool
// The time format to use instead of the default
TimeFormat string
// Control whether or not to display the time at all. This is required
// because setting TimeFormat to empty assumes the default format.
DisableTime bool
// Color the output. On Windows, colored logs are only avaiable for io.Writers that
// are concretely instances of *os.File.
Color ColorOption
// A function which is called with the log information and if it returns true the value
// should not be logged.
// This is useful when interacting with a system that you wish to suppress the log
// message for (because it's too noisy, etc)
Exclude func(level Level, msg string, args ...interface{}) bool
}
// InterceptLogger describes the interface for using a logger
// that can register different output sinks.
// This is useful for sending lower level log messages
// to a different output while keeping the root logger
// at a higher one.
type InterceptLogger interface {
// Logger is the root logger for an InterceptLogger
Logger
// RegisterSink adds a SinkAdapter to the InterceptLogger
RegisterSink(sink SinkAdapter)
// DeregisterSink removes a SinkAdapter from the InterceptLogger
DeregisterSink(sink SinkAdapter)
// Create a interceptlogger that will prepend the name string on the front of all messages.
// If the logger already has a name, the new value will be appended to the current
// name. That way, a major subsystem can use this to decorate all it's own logs
// without losing context.
NamedIntercept(name string) InterceptLogger
// Create a interceptlogger that will prepend the name string on the front of all messages.
// This sets the name of the logger to the value directly, unlike Named which honor
// the current name as well.
ResetNamedIntercept(name string) InterceptLogger
// Return a value that conforms to the stdlib log.Logger interface
StandardLoggerIntercept(opts *StandardLoggerOptions) *log.Logger
// Return a value that conforms to io.Writer, which can be passed into log.SetOutput()
StandardWriterIntercept(opts *StandardLoggerOptions) io.Writer
}
// SinkAdapter describes the interface that must be implemented
// in order to Register a new sink to an InterceptLogger
type SinkAdapter interface {
Accept(name string, level Level, msg string, args ...interface{})
}
// Flushable represents a method for flushing an output buffer. It can be used
// if Resetting the log to use a new output, in order to flush the writes to
// the existing output beforehand.
type Flushable interface {
Flush() error
}
// OutputResettable provides ways to swap the output in use at runtime
type OutputResettable interface {
// ResetOutput swaps the current output writer with the one given in the
// opts. Color options given in opts will be used for the new output.
ResetOutput(opts *LoggerOptions) error
// ResetOutputWithFlush swaps the current output writer with the one given
// in the opts, first calling Flush on the given Flushable. Color options
// given in opts will be used for the new output.
ResetOutputWithFlush(opts *LoggerOptions, flushable Flushable) error
}
// Locker is used for locking output. If not set when creating a logger, a
// sync.Mutex will be used internally.
type Locker interface {
// Lock is called when the output is going to be changed or written to
Lock()
// Unlock is called when the operation that called Lock() completes
Unlock()
}
// NoopLocker implements locker but does nothing. This is useful if the client
// wants tight control over locking, in order to provide grouping of log
// entries or other functionality.
type NoopLocker struct{}
// Lock does nothing
func (n NoopLocker) Lock() {}
// Unlock does nothing
func (n NoopLocker) Unlock() {}
var _ Locker = (*NoopLocker)(nil)

58
vendor/github.com/hashicorp/go-hclog/nulllogger.go generated vendored Normal file
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package hclog
import (
"io"
"io/ioutil"
"log"
)
// NewNullLogger instantiates a Logger for which all calls
// will succeed without doing anything.
// Useful for testing purposes.
func NewNullLogger() Logger {
return &nullLogger{}
}
type nullLogger struct{}
func (l *nullLogger) Log(level Level, msg string, args ...interface{}) {}
func (l *nullLogger) Trace(msg string, args ...interface{}) {}
func (l *nullLogger) Debug(msg string, args ...interface{}) {}
func (l *nullLogger) Info(msg string, args ...interface{}) {}
func (l *nullLogger) Warn(msg string, args ...interface{}) {}
func (l *nullLogger) Error(msg string, args ...interface{}) {}
func (l *nullLogger) IsTrace() bool { return false }
func (l *nullLogger) IsDebug() bool { return false }
func (l *nullLogger) IsInfo() bool { return false }
func (l *nullLogger) IsWarn() bool { return false }
func (l *nullLogger) IsError() bool { return false }
func (l *nullLogger) ImpliedArgs() []interface{} { return []interface{}{} }
func (l *nullLogger) With(args ...interface{}) Logger { return l }
func (l *nullLogger) Name() string { return "" }
func (l *nullLogger) Named(name string) Logger { return l }
func (l *nullLogger) ResetNamed(name string) Logger { return l }
func (l *nullLogger) SetLevel(level Level) {}
func (l *nullLogger) StandardLogger(opts *StandardLoggerOptions) *log.Logger {
return log.New(l.StandardWriter(opts), "", log.LstdFlags)
}
func (l *nullLogger) StandardWriter(opts *StandardLoggerOptions) io.Writer {
return ioutil.Discard
}

109
vendor/github.com/hashicorp/go-hclog/stacktrace.go generated vendored Normal file
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// Copyright (c) 2016 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package hclog
import (
"bytes"
"runtime"
"strconv"
"strings"
"sync"
)
var (
_stacktraceIgnorePrefixes = []string{
"runtime.goexit",
"runtime.main",
}
_stacktracePool = sync.Pool{
New: func() interface{} {
return newProgramCounters(64)
},
}
)
// CapturedStacktrace represents a stacktrace captured by a previous call
// to log.Stacktrace. If passed to a logging function, the stacktrace
// will be appended.
type CapturedStacktrace string
// Stacktrace captures a stacktrace of the current goroutine and returns
// it to be passed to a logging function.
func Stacktrace() CapturedStacktrace {
return CapturedStacktrace(takeStacktrace())
}
func takeStacktrace() string {
programCounters := _stacktracePool.Get().(*programCounters)
defer _stacktracePool.Put(programCounters)
var buffer bytes.Buffer
for {
// Skip the call to runtime.Counters and takeStacktrace so that the
// program counters start at the caller of takeStacktrace.
n := runtime.Callers(2, programCounters.pcs)
if n < cap(programCounters.pcs) {
programCounters.pcs = programCounters.pcs[:n]
break
}
// Don't put the too-short counter slice back into the pool; this lets
// the pool adjust if we consistently take deep stacktraces.
programCounters = newProgramCounters(len(programCounters.pcs) * 2)
}
i := 0
frames := runtime.CallersFrames(programCounters.pcs)
for frame, more := frames.Next(); more; frame, more = frames.Next() {
if shouldIgnoreStacktraceFunction(frame.Function) {
continue
}
if i != 0 {
buffer.WriteByte('\n')
}
i++
buffer.WriteString(frame.Function)
buffer.WriteByte('\n')
buffer.WriteByte('\t')
buffer.WriteString(frame.File)
buffer.WriteByte(':')
buffer.WriteString(strconv.Itoa(int(frame.Line)))
}
return buffer.String()
}
func shouldIgnoreStacktraceFunction(function string) bool {
for _, prefix := range _stacktraceIgnorePrefixes {
if strings.HasPrefix(function, prefix) {
return true
}
}
return false
}
type programCounters struct {
pcs []uintptr
}
func newProgramCounters(size int) *programCounters {
return &programCounters{make([]uintptr, size)}
}

95
vendor/github.com/hashicorp/go-hclog/stdlog.go generated vendored Normal file
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package hclog
import (
"bytes"
"log"
"strings"
)
// Provides a io.Writer to shim the data out of *log.Logger
// and back into our Logger. This is basically the only way to
// build upon *log.Logger.
type stdlogAdapter struct {
log Logger
inferLevels bool
forceLevel Level
}
// Take the data, infer the levels if configured, and send it through
// a regular Logger.
func (s *stdlogAdapter) Write(data []byte) (int, error) {
str := string(bytes.TrimRight(data, " \t\n"))
if s.forceLevel != NoLevel {
// Use pickLevel to strip log levels included in the line since we are
// forcing the level
_, str := s.pickLevel(str)
// Log at the forced level
s.dispatch(str, s.forceLevel)
} else if s.inferLevels {
level, str := s.pickLevel(str)
s.dispatch(str, level)
} else {
s.log.Info(str)
}
return len(data), nil
}
func (s *stdlogAdapter) dispatch(str string, level Level) {
switch level {
case Trace:
s.log.Trace(str)
case Debug:
s.log.Debug(str)
case Info:
s.log.Info(str)
case Warn:
s.log.Warn(str)
case Error:
s.log.Error(str)
default:
s.log.Info(str)
}
}
// Detect, based on conventions, what log level this is.
func (s *stdlogAdapter) pickLevel(str string) (Level, string) {
switch {
case strings.HasPrefix(str, "[DEBUG]"):
return Debug, strings.TrimSpace(str[7:])
case strings.HasPrefix(str, "[TRACE]"):
return Trace, strings.TrimSpace(str[7:])
case strings.HasPrefix(str, "[INFO]"):
return Info, strings.TrimSpace(str[6:])
case strings.HasPrefix(str, "[WARN]"):
return Warn, strings.TrimSpace(str[7:])
case strings.HasPrefix(str, "[ERROR]"):
return Error, strings.TrimSpace(str[7:])
case strings.HasPrefix(str, "[ERR]"):
return Error, strings.TrimSpace(str[5:])
default:
return Info, str
}
}
type logWriter struct {
l *log.Logger
}
func (l *logWriter) Write(b []byte) (int, error) {
l.l.Println(string(bytes.TrimRight(b, " \n\t")))
return len(b), nil
}
// Takes a standard library logger and returns a Logger that will write to it
func FromStandardLogger(l *log.Logger, opts *LoggerOptions) Logger {
var dl LoggerOptions = *opts
// Use the time format that log.Logger uses
dl.DisableTime = true
dl.Output = &logWriter{l}
return New(&dl)
}

82
vendor/github.com/hashicorp/go-hclog/writer.go generated vendored Normal file
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package hclog
import (
"bytes"
"io"
)
type writer struct {
b bytes.Buffer
w io.Writer
color ColorOption
}
func newWriter(w io.Writer, color ColorOption) *writer {
return &writer{w: w, color: color}
}
func (w *writer) Flush(level Level) (err error) {
var unwritten = w.b.Bytes()
if w.color != ColorOff {
color := _levelToColor[level]
unwritten = []byte(color.Sprintf("%s", unwritten))
}
if lw, ok := w.w.(LevelWriter); ok {
_, err = lw.LevelWrite(level, unwritten)
} else {
_, err = w.w.Write(unwritten)
}
w.b.Reset()
return err
}
func (w *writer) Write(p []byte) (int, error) {
return w.b.Write(p)
}
func (w *writer) WriteByte(c byte) error {
return w.b.WriteByte(c)
}
func (w *writer) WriteString(s string) (int, error) {
return w.b.WriteString(s)
}
// LevelWriter is the interface that wraps the LevelWrite method.
type LevelWriter interface {
LevelWrite(level Level, p []byte) (n int, err error)
}
// LeveledWriter writes all log messages to the standard writer,
// except for log levels that are defined in the overrides map.
type LeveledWriter struct {
standard io.Writer
overrides map[Level]io.Writer
}
// NewLeveledWriter returns an initialized LeveledWriter.
//
// standard will be used as the default writer for all log levels,
// except for log levels that are defined in the overrides map.
func NewLeveledWriter(standard io.Writer, overrides map[Level]io.Writer) *LeveledWriter {
return &LeveledWriter{
standard: standard,
overrides: overrides,
}
}
// Write implements io.Writer.
func (lw *LeveledWriter) Write(p []byte) (int, error) {
return lw.standard.Write(p)
}
// LevelWrite implements LevelWriter.
func (lw *LeveledWriter) LevelWrite(level Level, p []byte) (int, error) {
w, ok := lw.overrides[level]
if !ok {
w = lw.standard
}
return w.Write(p)
}

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vendor/github.com/hashicorp/go-multierror/.travis.yml generated vendored Normal file
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sudo: false
language: go
go:
- 1.x
branches:
only:
- master
script: env GO111MODULE=on make test testrace

353
vendor/github.com/hashicorp/go-multierror/LICENSE generated vendored Normal file
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Mozilla Public License, version 2.0
1. Definitions
1.1. “Contributor”
means each individual or legal entity that creates, contributes to the
creation of, or owns Covered Software.
1.2. “Contributor Version”
means the combination of the Contributions of others (if any) used by a
Contributor and that particular Contributor’s Contribution.
1.3. “Contribution”
means Covered Software of a particular Contributor.
1.4. “Covered Software”
means Source Code Form to which the initial Contributor has attached the
notice in Exhibit A, the Executable Form of such Source Code Form, and
Modifications of such Source Code Form, in each case including portions
thereof.
1.5. “Incompatible With Secondary Licenses”
means
a. that the initial Contributor has attached the notice described in
Exhibit B to the Covered Software; or
b. that the Covered Software was made available under the terms of version
1.1 or earlier of the License, but not also under the terms of a
Secondary License.
1.6. “Executable Form”
means any form of the work other than Source Code Form.
1.7. “Larger Work”
means a work that combines Covered Software with other material, in a separate
file or files, that is not Covered Software.
1.8. “License”
means this document.
1.9. “Licensable”
means having the right to grant, to the maximum extent possible, whether at the
time of the initial grant or subsequently, any and all of the rights conveyed by
this License.
1.10. “Modifications”
means any of the following:
a. any file in Source Code Form that results from an addition to, deletion
from, or modification of the contents of Covered Software; or
b. any new file in Source Code Form that contains any Covered Software.
1.11. “Patent Claims” of a Contributor
means any patent claim(s), including without limitation, method, process,
and apparatus claims, in any patent Licensable by such Contributor that
would be infringed, but for the grant of the License, by the making,
using, selling, offering for sale, having made, import, or transfer of
either its Contributions or its Contributor Version.
1.12. “Secondary License”
means either the GNU General Public License, Version 2.0, the GNU Lesser
General Public License, Version 2.1, the GNU Affero General Public
License, Version 3.0, or any later versions of those licenses.
1.13. “Source Code Form”
means the form of the work preferred for making modifications.
1.14. “You” (or “Your”)
means an individual or a legal entity exercising rights under this
License. For legal entities, “You” includes any entity that controls, is
controlled by, or is under common control with You. For purposes of this
definition, “control” means (a) the power, direct or indirect, to cause
the direction or management of such entity, whether by contract or
otherwise, or (b) ownership of more than fifty percent (50%) of the
outstanding shares or beneficial ownership of such entity.
2. License Grants and Conditions
2.1. Grants
Each Contributor hereby grants You a world-wide, royalty-free,
non-exclusive license:
a. under intellectual property rights (other than patent or trademark)
Licensable by such Contributor to use, reproduce, make available,
modify, display, perform, distribute, and otherwise exploit its
Contributions, either on an unmodified basis, with Modifications, or as
part of a Larger Work; and
b. under Patent Claims of such Contributor to make, use, sell, offer for
sale, have made, import, and otherwise transfer either its Contributions
or its Contributor Version.
2.2. Effective Date
The licenses granted in Section 2.1 with respect to any Contribution become
effective for each Contribution on the date the Contributor first distributes
such Contribution.
2.3. Limitations on Grant Scope
The licenses granted in this Section 2 are the only rights granted under this
License. No additional rights or licenses will be implied from the distribution
or licensing of Covered Software under this License. Notwithstanding Section
2.1(b) above, no patent license is granted by a Contributor:
a. for any code that a Contributor has removed from Covered Software; or
b. for infringements caused by: (i) Your and any other third party’s
modifications of Covered Software, or (ii) the combination of its
Contributions with other software (except as part of its Contributor
Version); or
c. under Patent Claims infringed by Covered Software in the absence of its
Contributions.
This License does not grant any rights in the trademarks, service marks, or
logos of any Contributor (except as may be necessary to comply with the
notice requirements in Section 3.4).
2.4. Subsequent Licenses
No Contributor makes additional grants as a result of Your choice to
distribute the Covered Software under a subsequent version of this License
(see Section 10.2) or under the terms of a Secondary License (if permitted
under the terms of Section 3.3).
2.5. Representation
Each Contributor represents that the Contributor believes its Contributions
are its original creation(s) or it has sufficient rights to grant the
rights to its Contributions conveyed by this License.
2.6. Fair Use
This License is not intended to limit any rights You have under applicable
copyright doctrines of fair use, fair dealing, or other equivalents.
2.7. Conditions
Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted in
Section 2.1.
3. Responsibilities
3.1. Distribution of Source Form
All distribution of Covered Software in Source Code Form, including any
Modifications that You create or to which You contribute, must be under the
terms of this License. You must inform recipients that the Source Code Form
of the Covered Software is governed by the terms of this License, and how
they can obtain a copy of this License. You may not attempt to alter or
restrict the recipients’ rights in the Source Code Form.
3.2. Distribution of Executable Form
If You distribute Covered Software in Executable Form then:
a. such Covered Software must also be made available in Source Code Form,
as described in Section 3.1, and You must inform recipients of the
Executable Form how they can obtain a copy of such Source Code Form by
reasonable means in a timely manner, at a charge no more than the cost
of distribution to the recipient; and
b. You may distribute such Executable Form under the terms of this License,
or sublicense it under different terms, provided that the license for
the Executable Form does not attempt to limit or alter the recipients’
rights in the Source Code Form under this License.
3.3. Distribution of a Larger Work
You may create and distribute a Larger Work under terms of Your choice,
provided that You also comply with the requirements of this License for the
Covered Software. If the Larger Work is a combination of Covered Software
with a work governed by one or more Secondary Licenses, and the Covered
Software is not Incompatible With Secondary Licenses, this License permits
You to additionally distribute such Covered Software under the terms of
such Secondary License(s), so that the recipient of the Larger Work may, at
their option, further distribute the Covered Software under the terms of
either this License or such Secondary License(s).
3.4. Notices
You may not remove or alter the substance of any license notices (including
copyright notices, patent notices, disclaimers of warranty, or limitations
of liability) contained within the Source Code Form of the Covered
Software, except that You may alter any license notices to the extent
required to remedy known factual inaccuracies.
3.5. Application of Additional Terms
You may choose to offer, and to charge a fee for, warranty, support,
indemnity or liability obligations to one or more recipients of Covered
Software. However, You may do so only on Your own behalf, and not on behalf
of any Contributor. You must make it absolutely clear that any such
warranty, support, indemnity, or liability obligation is offered by You
alone, and You hereby agree to indemnify every Contributor for any
liability incurred by such Contributor as a result of warranty, support,
indemnity or liability terms You offer. You may include additional
disclaimers of warranty and limitations of liability specific to any
jurisdiction.
4. Inability to Comply Due to Statute or Regulation
If it is impossible for You to comply with any of the terms of this License
with respect to some or all of the Covered Software due to statute, judicial
order, or regulation then You must: (a) comply with the terms of this License
to the maximum extent possible; and (b) describe the limitations and the code
they affect. Such description must be placed in a text file included with all
distributions of the Covered Software under this License. Except to the
extent prohibited by statute or regulation, such description must be
sufficiently detailed for a recipient of ordinary skill to be able to
understand it.
5. Termination
5.1. The rights granted under this License will terminate automatically if You
fail to comply with any of its terms. However, if You become compliant,
then the rights granted under this License from a particular Contributor
are reinstated (a) provisionally, unless and until such Contributor
explicitly and finally terminates Your grants, and (b) on an ongoing basis,
if such Contributor fails to notify You of the non-compliance by some
reasonable means prior to 60 days after You have come back into compliance.
Moreover, Your grants from a particular Contributor are reinstated on an
ongoing basis if such Contributor notifies You of the non-compliance by
some reasonable means, this is the first time You have received notice of
non-compliance with this License from such Contributor, and You become
compliant prior to 30 days after Your receipt of the notice.
5.2. If You initiate litigation against any entity by asserting a patent
infringement claim (excluding declaratory judgment actions, counter-claims,
and cross-claims) alleging that a Contributor Version directly or
indirectly infringes any patent, then the rights granted to You by any and
all Contributors for the Covered Software under Section 2.1 of this License
shall terminate.
5.3. In the event of termination under Sections 5.1 or 5.2 above, all end user
license agreements (excluding distributors and resellers) which have been
validly granted by You or Your distributors under this License prior to
termination shall survive termination.
6. Disclaimer of Warranty
Covered Software is provided under this License on an “as is” basis, without
warranty of any kind, either expressed, implied, or statutory, including,
without limitation, warranties that the Covered Software is free of defects,
merchantable, fit for a particular purpose or non-infringing. The entire
risk as to the quality and performance of the Covered Software is with You.
Should any Covered Software prove defective in any respect, You (not any
Contributor) assume the cost of any necessary servicing, repair, or
correction. This disclaimer of warranty constitutes an essential part of this
License. No use of any Covered Software is authorized under this License
except under this disclaimer.
7. Limitation of Liability
Under no circumstances and under no legal theory, whether tort (including
negligence), contract, or otherwise, shall any Contributor, or anyone who
distributes Covered Software as permitted above, be liable to You for any
direct, indirect, special, incidental, or consequential damages of any
character including, without limitation, damages for lost profits, loss of
goodwill, work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses, even if such party shall have been
informed of the possibility of such damages. This limitation of liability
shall not apply to liability for death or personal injury resulting from such
party’s negligence to the extent applicable law prohibits such limitation.
Some jurisdictions do not allow the exclusion or limitation of incidental or
consequential damages, so this exclusion and limitation may not apply to You.
8. Litigation
Any litigation relating to this License may be brought only in the courts of
a jurisdiction where the defendant maintains its principal place of business
and such litigation shall be governed by laws of that jurisdiction, without
reference to its conflict-of-law provisions. Nothing in this Section shall
prevent a party’s ability to bring cross-claims or counter-claims.
9. Miscellaneous
This License represents the complete agreement concerning the subject matter
hereof. If any provision of this License is held to be unenforceable, such
provision shall be reformed only to the extent necessary to make it
enforceable. Any law or regulation which provides that the language of a
contract shall be construed against the drafter shall not be used to construe
this License against a Contributor.
10. Versions of the License
10.1. New Versions
Mozilla Foundation is the license steward. Except as provided in Section
10.3, no one other than the license steward has the right to modify or
publish new versions of this License. Each version will be given a
distinguishing version number.
10.2. Effect of New Versions
You may distribute the Covered Software under the terms of the version of
the License under which You originally received the Covered Software, or
under the terms of any subsequent version published by the license
steward.
10.3. Modified Versions
If you create software not governed by this License, and you want to
create a new license for such software, you may create and use a modified
version of this License if you rename the license and remove any
references to the name of the license steward (except to note that such
modified license differs from this License).
10.4. Distributing Source Code Form that is Incompatible With Secondary Licenses
If You choose to distribute Source Code Form that is Incompatible With
Secondary Licenses under the terms of this version of the License, the
notice described in Exhibit B of this License must be attached.
Exhibit A - Source Code Form License Notice
This Source Code Form is subject to the
terms of the Mozilla Public License, v.
2.0. If a copy of the MPL was not
distributed with this file, You can
obtain one at
http://mozilla.org/MPL/2.0/.
If it is not possible or desirable to put the notice in a particular file, then
You may include the notice in a location (such as a LICENSE file in a relevant
directory) where a recipient would be likely to look for such a notice.
You may add additional accurate notices of copyright ownership.
Exhibit B - “Incompatible With Secondary Licenses” Notice
This Source Code Form is “Incompatible
With Secondary Licenses”, as defined by
the Mozilla Public License, v. 2.0.

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TEST?=./...
default: test
# test runs the test suite and vets the code.
test: generate
@echo "==> Running tests..."
@go list $(TEST) \
| grep -v "/vendor/" \
| xargs -n1 go test -timeout=60s -parallel=10 ${TESTARGS}
# testrace runs the race checker
testrace: generate
@echo "==> Running tests (race)..."
@go list $(TEST) \
| grep -v "/vendor/" \
| xargs -n1 go test -timeout=60s -race ${TESTARGS}
# updatedeps installs all the dependencies needed to run and build.
updatedeps:
@sh -c "'${CURDIR}/scripts/deps.sh' '${NAME}'"
# generate runs `go generate` to build the dynamically generated source files.
generate:
@echo "==> Generating..."
@find . -type f -name '.DS_Store' -delete
@go list ./... \
| grep -v "/vendor/" \
| xargs -n1 go generate
.PHONY: default test testrace updatedeps generate

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# go-multierror
[![Build Status](http://img.shields.io/travis/hashicorp/go-multierror.svg?style=flat-square)][travis]
[![Go Documentation](http://img.shields.io/badge/go-documentation-blue.svg?style=flat-square)][godocs]
[travis]: https://travis-ci.org/hashicorp/go-multierror
[godocs]: https://godoc.org/github.com/hashicorp/go-multierror
`go-multierror` is a package for Go that provides a mechanism for
representing a list of `error` values as a single `error`.
This allows a function in Go to return an `error` that might actually
be a list of errors. If the caller knows this, they can unwrap the
list and access the errors. If the caller doesn't know, the error
formats to a nice human-readable format.
`go-multierror` is fully compatible with the Go standard library
[errors](https://golang.org/pkg/errors/) package, including the
functions `As`, `Is`, and `Unwrap`. This provides a standardized approach
for introspecting on error values.
## Installation and Docs
Install using `go get github.com/hashicorp/go-multierror`.
Full documentation is available at
http://godoc.org/github.com/hashicorp/go-multierror
## Usage
go-multierror is easy to use and purposely built to be unobtrusive in
existing Go applications/libraries that may not be aware of it.
**Building a list of errors**
The `Append` function is used to create a list of errors. This function
behaves a lot like the Go built-in `append` function: it doesn't matter
if the first argument is nil, a `multierror.Error`, or any other `error`,
the function behaves as you would expect.
```go
var result error
if err := step1(); err != nil {
result = multierror.Append(result, err)
}
if err := step2(); err != nil {
result = multierror.Append(result, err)
}
return result
```
**Customizing the formatting of the errors**
By specifying a custom `ErrorFormat`, you can customize the format
of the `Error() string` function:
```go
var result *multierror.Error
// ... accumulate errors here, maybe using Append
if result != nil {
result.ErrorFormat = func([]error) string {
return "errors!"
}
}
```
**Accessing the list of errors**
`multierror.Error` implements `error` so if the caller doesn't know about
multierror, it will work just fine. But if you're aware a multierror might
be returned, you can use type switches to access the list of errors:
```go
if err := something(); err != nil {
if merr, ok := err.(*multierror.Error); ok {
// Use merr.Errors
}
}
```
You can also use the standard [`errors.Unwrap`](https://golang.org/pkg/errors/#Unwrap)
function. This will continue to unwrap into subsequent errors until none exist.
**Extracting an error**
The standard library [`errors.As`](https://golang.org/pkg/errors/#As)
function can be used directly with a multierror to extract a specific error:
```go
// Assume err is a multierror value
err := somefunc()
// We want to know if "err" has a "RichErrorType" in it and extract it.
var errRich RichErrorType
if errors.As(err, &errRich) {
// It has it, and now errRich is populated.
}
```
**Checking for an exact error value**
Some errors are returned as exact errors such as the [`ErrNotExist`](https://golang.org/pkg/os/#pkg-variables)
error in the `os` package. You can check if this error is present by using
the standard [`errors.Is`](https://golang.org/pkg/errors/#Is) function.
```go
// Assume err is a multierror value
err := somefunc()
if errors.Is(err, os.ErrNotExist) {
// err contains os.ErrNotExist
}
```
**Returning a multierror only if there are errors**
If you build a `multierror.Error`, you can use the `ErrorOrNil` function
to return an `error` implementation only if there are errors to return:
```go
var result *multierror.Error
// ... accumulate errors here
// Return the `error` only if errors were added to the multierror, otherwise
// return nil since there are no errors.
return result.ErrorOrNil()
```

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package multierror
// Append is a helper function that will append more errors
// onto an Error in order to create a larger multi-error.
//
// If err is not a multierror.Error, then it will be turned into
// one. If any of the errs are multierr.Error, they will be flattened
// one level into err.
func Append(err error, errs ...error) *Error {
switch err := err.(type) {
case *Error:
// Typed nils can reach here, so initialize if we are nil
if err == nil {
err = new(Error)
}
// Go through each error and flatten
for _, e := range errs {
switch e := e.(type) {
case *Error:
if e != nil {
err.Errors = append(err.Errors, e.Errors...)
}
default:
if e != nil {
err.Errors = append(err.Errors, e)
}
}
}
return err
default:
newErrs := make([]error, 0, len(errs)+1)
if err != nil {
newErrs = append(newErrs, err)
}
newErrs = append(newErrs, errs...)
return Append(&Error{}, newErrs...)
}
}

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package multierror
// Flatten flattens the given error, merging any *Errors together into
// a single *Error.
func Flatten(err error) error {
// If it isn't an *Error, just return the error as-is
if _, ok := err.(*Error); !ok {
return err
}
// Otherwise, make the result and flatten away!
flatErr := new(Error)
flatten(err, flatErr)
return flatErr
}
func flatten(err error, flatErr *Error) {
switch err := err.(type) {
case *Error:
for _, e := range err.Errors {
flatten(e, flatErr)
}
default:
flatErr.Errors = append(flatErr.Errors, err)
}
}

27
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package multierror
import (
"fmt"
"strings"
)
// ErrorFormatFunc is a function callback that is called by Error to
// turn the list of errors into a string.
type ErrorFormatFunc func([]error) string
// ListFormatFunc is a basic formatter that outputs the number of errors
// that occurred along with a bullet point list of the errors.
func ListFormatFunc(es []error) string {
if len(es) == 1 {
return fmt.Sprintf("1 error occurred:\n\t* %s\n\n", es[0])
}
points := make([]string, len(es))
for i, err := range es {
points[i] = fmt.Sprintf("* %s", err)
}
return fmt.Sprintf(
"%d errors occurred:\n\t%s\n\n",
len(es), strings.Join(points, "\n\t"))
}

5
vendor/github.com/hashicorp/go-multierror/go.mod generated vendored Normal file
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module github.com/hashicorp/go-multierror
go 1.14
require github.com/hashicorp/errwrap v1.0.0

2
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github.com/hashicorp/errwrap v1.0.0 h1:hLrqtEDnRye3+sgx6z4qVLNuviH3MR5aQ0ykNJa/UYA=
github.com/hashicorp/errwrap v1.0.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=

38
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package multierror
import "sync"
// Group is a collection of goroutines which return errors that need to be
// coalesced.
type Group struct {
mutex sync.Mutex
err *Error
wg sync.WaitGroup
}
// Go calls the given function in a new goroutine.
//
// If the function returns an error it is added to the group multierror which
// is returned by Wait.
func (g *Group) Go(f func() error) {
g.wg.Add(1)
go func() {
defer g.wg.Done()
if err := f(); err != nil {
g.mutex.Lock()
g.err = Append(g.err, err)
g.mutex.Unlock()
}
}()
}
// Wait blocks until all function calls from the Go method have returned, then
// returns the multierror.
func (g *Group) Wait() *Error {
g.wg.Wait()
g.mutex.Lock()
defer g.mutex.Unlock()
return g.err
}

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package multierror
import (
"errors"
"fmt"
)
// Error is an error type to track multiple errors. This is used to
// accumulate errors in cases and return them as a single "error".
type Error struct {
Errors []error
ErrorFormat ErrorFormatFunc
}
func (e *Error) Error() string {
fn := e.ErrorFormat
if fn == nil {
fn = ListFormatFunc
}
return fn(e.Errors)
}
// ErrorOrNil returns an error interface if this Error represents
// a list of errors, or returns nil if the list of errors is empty. This
// function is useful at the end of accumulation to make sure that the value
// returned represents the existence of errors.
func (e *Error) ErrorOrNil() error {
if e == nil {
return nil
}
if len(e.Errors) == 0 {
return nil
}
return e
}
func (e *Error) GoString() string {
return fmt.Sprintf("*%#v", *e)
}
// WrappedErrors returns the list of errors that this Error is wrapping.
// It is an implementation of the errwrap.Wrapper interface so that
// multierror.Error can be used with that library.
//
// This method is not safe to be called concurrently and is no different
// than accessing the Errors field directly. It is implemented only to
// satisfy the errwrap.Wrapper interface.
func (e *Error) WrappedErrors() []error {
return e.Errors
}
// Unwrap returns an error from Error (or nil if there are no errors).
// This error returned will further support Unwrap to get the next error,
// etc. The order will match the order of Errors in the multierror.Error
// at the time of calling.
//
// The resulting error supports errors.As/Is/Unwrap so you can continue
// to use the stdlib errors package to introspect further.
//
// This will perform a shallow copy of the errors slice. Any errors appended
// to this error after calling Unwrap will not be available until a new
// Unwrap is called on the multierror.Error.
func (e *Error) Unwrap() error {
// If we have no errors then we do nothing
if e == nil || len(e.Errors) == 0 {
return nil
}
// If we have exactly one error, we can just return that directly.
if len(e.Errors) == 1 {
return e.Errors[0]
}
// Shallow copy the slice
errs := make([]error, len(e.Errors))
copy(errs, e.Errors)
return chain(errs)
}
// chain implements the interfaces necessary for errors.Is/As/Unwrap to
// work in a deterministic way with multierror. A chain tracks a list of
// errors while accounting for the current represented error. This lets
// Is/As be meaningful.
//
// Unwrap returns the next error. In the cleanest form, Unwrap would return
// the wrapped error here but we can't do that if we want to properly
// get access to all the errors. Instead, users are recommended to use
// Is/As to get the correct error type out.
//
// Precondition: []error is non-empty (len > 0)
type chain []error
// Error implements the error interface
func (e chain) Error() string {
return e[0].Error()
}
// Unwrap implements errors.Unwrap by returning the next error in the
// chain or nil if there are no more errors.
func (e chain) Unwrap() error {
if len(e) == 1 {
return nil
}
return e[1:]
}
// As implements errors.As by attempting to map to the current value.
func (e chain) As(target interface{}) bool {
return errors.As(e[0], target)
}
// Is implements errors.Is by comparing the current value directly.
func (e chain) Is(target error) bool {
return errors.Is(e[0], target)
}

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package multierror
import (
"fmt"
"github.com/hashicorp/errwrap"
)
// Prefix is a helper function that will prefix some text
// to the given error. If the error is a multierror.Error, then
// it will be prefixed to each wrapped error.
//
// This is useful to use when appending multiple multierrors
// together in order to give better scoping.
func Prefix(err error, prefix string) error {
if err == nil {
return nil
}
format := fmt.Sprintf("%s {{err}}", prefix)
switch err := err.(type) {
case *Error:
// Typed nils can reach here, so initialize if we are nil
if err == nil {
err = new(Error)
}
// Wrap each of the errors
for i, e := range err.Errors {
err.Errors[i] = errwrap.Wrapf(format, e)
}
return err
default:
return errwrap.Wrapf(format, err)
}
}

16
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package multierror
// Len implements sort.Interface function for length
func (err Error) Len() int {
return len(err.Errors)
}
// Swap implements sort.Interface function for swapping elements
func (err Error) Swap(i, j int) {
err.Errors[i], err.Errors[j] = err.Errors[j], err.Errors[i]
}
// Less implements sort.Interface function for determining order
func (err Error) Less(i, j int) bool {
return err.Errors[i].Error() < err.Errors[j].Error()
}

4
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.idea/
*.iml
*.test
.vscode/

12
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sudo: false
language: go
go:
- 1.12.4
branches:
only:
- master
script: make updatedeps test

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Mozilla Public License, version 2.0
1. Definitions
1.1. "Contributor"
means each individual or legal entity that creates, contributes to the
creation of, or owns Covered Software.
1.2. "Contributor Version"
means the combination of the Contributions of others (if any) used by a
Contributor and that particular Contributor's Contribution.
1.3. "Contribution"
means Covered Software of a particular Contributor.
1.4. "Covered Software"
means Source Code Form to which the initial Contributor has attached the
notice in Exhibit A, the Executable Form of such Source Code Form, and
Modifications of such Source Code Form, in each case including portions
thereof.
1.5. "Incompatible With Secondary Licenses"
means
a. that the initial Contributor has attached the notice described in
Exhibit B to the Covered Software; or
b. that the Covered Software was made available under the terms of
version 1.1 or earlier of the License, but not also under the terms of
a Secondary License.
1.6. "Executable Form"
means any form of the work other than Source Code Form.
1.7. "Larger Work"
means a work that combines Covered Software with other material, in a
separate file or files, that is not Covered Software.
1.8. "License"
means this document.
1.9. "Licensable"
means having the right to grant, to the maximum extent possible, whether
at the time of the initial grant or subsequently, any and all of the
rights conveyed by this License.
1.10. "Modifications"
means any of the following:
a. any file in Source Code Form that results from an addition to,
deletion from, or modification of the contents of Covered Software; or
b. any new file in Source Code Form that contains any Covered Software.
1.11. "Patent Claims" of a Contributor
means any patent claim(s), including without limitation, method,
process, and apparatus claims, in any patent Licensable by such
Contributor that would be infringed, but for the grant of the License,
by the making, using, selling, offering for sale, having made, import,
or transfer of either its Contributions or its Contributor Version.
1.12. "Secondary License"
means either the GNU General Public License, Version 2.0, the GNU Lesser
General Public License, Version 2.1, the GNU Affero General Public
License, Version 3.0, or any later versions of those licenses.
1.13. "Source Code Form"
means the form of the work preferred for making modifications.
1.14. "You" (or "Your")
means an individual or a legal entity exercising rights under this
License. For legal entities, "You" includes any entity that controls, is
controlled by, or is under common control with You. For purposes of this
definition, "control" means (a) the power, direct or indirect, to cause
the direction or management of such entity, whether by contract or
otherwise, or (b) ownership of more than fifty percent (50%) of the
outstanding shares or beneficial ownership of such entity.
2. License Grants and Conditions
2.1. Grants
Each Contributor hereby grants You a world-wide, royalty-free,
non-exclusive license:
a. under intellectual property rights (other than patent or trademark)
Licensable by such Contributor to use, reproduce, make available,
modify, display, perform, distribute, and otherwise exploit its
Contributions, either on an unmodified basis, with Modifications, or
as part of a Larger Work; and
b. under Patent Claims of such Contributor to make, use, sell, offer for
sale, have made, import, and otherwise transfer either its
Contributions or its Contributor Version.
2.2. Effective Date
The licenses granted in Section 2.1 with respect to any Contribution
become effective for each Contribution on the date the Contributor first
distributes such Contribution.
2.3. Limitations on Grant Scope
The licenses granted in this Section 2 are the only rights granted under
this License. No additional rights or licenses will be implied from the
distribution or licensing of Covered Software under this License.
Notwithstanding Section 2.1(b) above, no patent license is granted by a
Contributor:
a. for any code that a Contributor has removed from Covered Software; or
b. for infringements caused by: (i) Your and any other third party's
modifications of Covered Software, or (ii) the combination of its
Contributions with other software (except as part of its Contributor
Version); or
c. under Patent Claims infringed by Covered Software in the absence of
its Contributions.
This License does not grant any rights in the trademarks, service marks,
or logos of any Contributor (except as may be necessary to comply with
the notice requirements in Section 3.4).
2.4. Subsequent Licenses
No Contributor makes additional grants as a result of Your choice to
distribute the Covered Software under a subsequent version of this
License (see Section 10.2) or under the terms of a Secondary License (if
permitted under the terms of Section 3.3).
2.5. Representation
Each Contributor represents that the Contributor believes its
Contributions are its original creation(s) or it has sufficient rights to
grant the rights to its Contributions conveyed by this License.
2.6. Fair Use
This License is not intended to limit any rights You have under
applicable copyright doctrines of fair use, fair dealing, or other
equivalents.
2.7. Conditions
Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted in
Section 2.1.
3. Responsibilities
3.1. Distribution of Source Form
All distribution of Covered Software in Source Code Form, including any
Modifications that You create or to which You contribute, must be under
the terms of this License. You must inform recipients that the Source
Code Form of the Covered Software is governed by the terms of this
License, and how they can obtain a copy of this License. You may not
attempt to alter or restrict the recipients' rights in the Source Code
Form.
3.2. Distribution of Executable Form
If You distribute Covered Software in Executable Form then:
a. such Covered Software must also be made available in Source Code Form,
as described in Section 3.1, and You must inform recipients of the
Executable Form how they can obtain a copy of such Source Code Form by
reasonable means in a timely manner, at a charge no more than the cost
of distribution to the recipient; and
b. You may distribute such Executable Form under the terms of this
License, or sublicense it under different terms, provided that the
license for the Executable Form does not attempt to limit or alter the
recipients' rights in the Source Code Form under this License.
3.3. Distribution of a Larger Work
You may create and distribute a Larger Work under terms of Your choice,
provided that You also comply with the requirements of this License for
the Covered Software. If the Larger Work is a combination of Covered
Software with a work governed by one or more Secondary Licenses, and the
Covered Software is not Incompatible With Secondary Licenses, this
License permits You to additionally distribute such Covered Software
under the terms of such Secondary License(s), so that the recipient of
the Larger Work may, at their option, further distribute the Covered
Software under the terms of either this License or such Secondary
License(s).
3.4. Notices
You may not remove or alter the substance of any license notices
(including copyright notices, patent notices, disclaimers of warranty, or
limitations of liability) contained within the Source Code Form of the
Covered Software, except that You may alter any license notices to the
extent required to remedy known factual inaccuracies.
3.5. Application of Additional Terms
You may choose to offer, and to charge a fee for, warranty, support,
indemnity or liability obligations to one or more recipients of Covered
Software. However, You may do so only on Your own behalf, and not on
behalf of any Contributor. You must make it absolutely clear that any
such warranty, support, indemnity, or liability obligation is offered by
You alone, and You hereby agree to indemnify every Contributor for any
liability incurred by such Contributor as a result of warranty, support,
indemnity or liability terms You offer. You may include additional
disclaimers of warranty and limitations of liability specific to any
jurisdiction.
4. Inability to Comply Due to Statute or Regulation
If it is impossible for You to comply with any of the terms of this License
with respect to some or all of the Covered Software due to statute,
judicial order, or regulation then You must: (a) comply with the terms of
this License to the maximum extent possible; and (b) describe the
limitations and the code they affect. Such description must be placed in a
text file included with all distributions of the Covered Software under
this License. Except to the extent prohibited by statute or regulation,
such description must be sufficiently detailed for a recipient of ordinary
skill to be able to understand it.
5. Termination
5.1. The rights granted under this License will terminate automatically if You
fail to comply with any of its terms. However, if You become compliant,
then the rights granted under this License from a particular Contributor
are reinstated (a) provisionally, unless and until such Contributor
explicitly and finally terminates Your grants, and (b) on an ongoing
basis, if such Contributor fails to notify You of the non-compliance by
some reasonable means prior to 60 days after You have come back into
compliance. Moreover, Your grants from a particular Contributor are
reinstated on an ongoing basis if such Contributor notifies You of the
non-compliance by some reasonable means, this is the first time You have
received notice of non-compliance with this License from such
Contributor, and You become compliant prior to 30 days after Your receipt
of the notice.
5.2. If You initiate litigation against any entity by asserting a patent
infringement claim (excluding declaratory judgment actions,
counter-claims, and cross-claims) alleging that a Contributor Version
directly or indirectly infringes any patent, then the rights granted to
You by any and all Contributors for the Covered Software under Section
2.1 of this License shall terminate.
5.3. In the event of termination under Sections 5.1 or 5.2 above, all end user
license agreements (excluding distributors and resellers) which have been
validly granted by You or Your distributors under this License prior to
termination shall survive termination.
6. Disclaimer of Warranty
Covered Software is provided under this License on an "as is" basis,
without warranty of any kind, either expressed, implied, or statutory,
including, without limitation, warranties that the Covered Software is free
of defects, merchantable, fit for a particular purpose or non-infringing.
The entire risk as to the quality and performance of the Covered Software
is with You. Should any Covered Software prove defective in any respect,
You (not any Contributor) assume the cost of any necessary servicing,
repair, or correction. This disclaimer of warranty constitutes an essential
part of this License. No use of any Covered Software is authorized under
this License except under this disclaimer.
7. Limitation of Liability
Under no circumstances and under no legal theory, whether tort (including
negligence), contract, or otherwise, shall any Contributor, or anyone who
distributes Covered Software as permitted above, be liable to You for any
direct, indirect, special, incidental, or consequential damages of any
character including, without limitation, damages for lost profits, loss of
goodwill, work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses, even if such party shall have been
informed of the possibility of such damages. This limitation of liability
shall not apply to liability for death or personal injury resulting from
such party's negligence to the extent applicable law prohibits such
limitation. Some jurisdictions do not allow the exclusion or limitation of
incidental or consequential damages, so this exclusion and limitation may
not apply to You.
8. Litigation
Any litigation relating to this License may be brought only in the courts
of a jurisdiction where the defendant maintains its principal place of
business and such litigation shall be governed by laws of that
jurisdiction, without reference to its conflict-of-law provisions. Nothing
in this Section shall prevent a party's ability to bring cross-claims or
counter-claims.
9. Miscellaneous
This License represents the complete agreement concerning the subject
matter hereof. If any provision of this License is held to be
unenforceable, such provision shall be reformed only to the extent
necessary to make it enforceable. Any law or regulation which provides that
the language of a contract shall be construed against the drafter shall not
be used to construe this License against a Contributor.
10. Versions of the License
10.1. New Versions
Mozilla Foundation is the license steward. Except as provided in Section
10.3, no one other than the license steward has the right to modify or
publish new versions of this License. Each version will be given a
distinguishing version number.
10.2. Effect of New Versions
You may distribute the Covered Software under the terms of the version
of the License under which You originally received the Covered Software,
or under the terms of any subsequent version published by the license
steward.
10.3. Modified Versions
If you create software not governed by this License, and you want to
create a new license for such software, you may create and use a
modified version of this License if you rename the license and remove
any references to the name of the license steward (except to note that
such modified license differs from this License).
10.4. Distributing Source Code Form that is Incompatible With Secondary
Licenses If You choose to distribute Source Code Form that is
Incompatible With Secondary Licenses under the terms of this version of
the License, the notice described in Exhibit B of this License must be
attached.
Exhibit A - Source Code Form License Notice
This Source Code Form is subject to the
terms of the Mozilla Public License, v.
2.0. If a copy of the MPL was not
distributed with this file, You can
obtain one at
http://mozilla.org/MPL/2.0/.
If it is not possible or desirable to put the notice in a particular file,
then You may include the notice in a location (such as a LICENSE file in a
relevant directory) where a recipient would be likely to look for such a
notice.
You may add additional accurate notices of copyright ownership.
Exhibit B - "Incompatible With Secondary Licenses" Notice
This Source Code Form is "Incompatible
With Secondary Licenses", as defined by
the Mozilla Public License, v. 2.0.

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default: test
test:
go vet ./...
go test -race ./...
updatedeps:
go get -f -t -u ./...
go get -f -u ./...
.PHONY: default test updatedeps

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go-retryablehttp
================
[![Build Status](http://img.shields.io/travis/hashicorp/go-retryablehttp.svg?style=flat-square)][travis]
[![Go Documentation](http://img.shields.io/badge/go-documentation-blue.svg?style=flat-square)][godocs]
[travis]: http://travis-ci.org/hashicorp/go-retryablehttp
[godocs]: http://godoc.org/github.com/hashicorp/go-retryablehttp
The `retryablehttp` package provides a familiar HTTP client interface with
automatic retries and exponential backoff. It is a thin wrapper over the
standard `net/http` client library and exposes nearly the same public API. This
makes `retryablehttp` very easy to drop into existing programs.
`retryablehttp` performs automatic retries under certain conditions. Mainly, if
an error is returned by the client (connection errors, etc.), or if a 500-range
response code is received (except 501), then a retry is invoked after a wait
period. Otherwise, the response is returned and left to the caller to
interpret.
The main difference from `net/http` is that requests which take a request body
(POST/PUT et. al) can have the body provided in a number of ways (some more or
less efficient) that allow "rewinding" the request body if the initial request
fails so that the full request can be attempted again. See the
[godoc](http://godoc.org/github.com/hashicorp/go-retryablehttp) for more
details.
Version 0.6.0 and before are compatible with Go prior to 1.12. From 0.6.1 onward, Go 1.12+ is required.
Example Use
===========
Using this library should look almost identical to what you would do with
`net/http`. The most simple example of a GET request is shown below:
```go
resp, err := retryablehttp.Get("/foo")
if err != nil {
panic(err)
}
```
The returned response object is an `*http.Response`, the same thing you would
usually get from `net/http`. Had the request failed one or more times, the above
call would block and retry with exponential backoff.
## Getting a stdlib `*http.Client` with retries
It's possible to convert a `*retryablehttp.Client` directly to a `*http.Client`.
This makes use of retryablehttp broadly applicable with minimal effort. Simply
configure a `*retryablehttp.Client` as you wish, and then call `StandardClient()`:
```go
retryClient := retryablehttp.NewClient()
retryClient.RetryMax = 10
standardClient := retryClient.StandardClient() // *http.Client
```
For more usage and examples see the
[godoc](http://godoc.org/github.com/hashicorp/go-retryablehttp).

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// Package retryablehttp provides a familiar HTTP client interface with
// automatic retries and exponential backoff. It is a thin wrapper over the
// standard net/http client library and exposes nearly the same public API.
// This makes retryablehttp very easy to drop into existing programs.
//
// retryablehttp performs automatic retries under certain conditions. Mainly, if
// an error is returned by the client (connection errors etc), or if a 500-range
// response is received, then a retry is invoked. Otherwise, the response is
// returned and left to the caller to interpret.
//
// Requests which take a request body should provide a non-nil function
// parameter. The best choice is to provide either a function satisfying
// ReaderFunc which provides multiple io.Readers in an efficient manner, a
// *bytes.Buffer (the underlying raw byte slice will be used) or a raw byte
// slice. As it is a reference type, and we will wrap it as needed by readers,
// we can efficiently re-use the request body without needing to copy it. If an
// io.Reader (such as a *bytes.Reader) is provided, the full body will be read
// prior to the first request, and will be efficiently re-used for any retries.
// ReadSeeker can be used, but some users have observed occasional data races
// between the net/http library and the Seek functionality of some
// implementations of ReadSeeker, so should be avoided if possible.
package retryablehttp
import (
"bytes"
"context"
"crypto/x509"
"fmt"
"io"
"io/ioutil"
"log"
"math"
"math/rand"
"net/http"
"net/url"
"os"
"regexp"
"strings"
"sync"
"time"
"github.com/hashicorp/go-cleanhttp"
)
var (
// Default retry configuration
defaultRetryWaitMin = 1 * time.Second
defaultRetryWaitMax = 30 * time.Second
defaultRetryMax = 4
// defaultLogger is the logger provided with defaultClient
defaultLogger = log.New(os.Stderr, "", log.LstdFlags)
// defaultClient is used for performing requests without explicitly making
// a new client. It is purposely private to avoid modifications.
defaultClient = NewClient()
// We need to consume response bodies to maintain http connections, but
// limit the size we consume to respReadLimit.
respReadLimit = int64(4096)
// A regular expression to match the error returned by net/http when the
// configured number of redirects is exhausted. This error isn't typed
// specifically so we resort to matching on the error string.
redirectsErrorRe = regexp.MustCompile(`stopped after \d+ redirects\z`)
// A regular expression to match the error returned by net/http when the
// scheme specified in the URL is invalid. This error isn't typed
// specifically so we resort to matching on the error string.
schemeErrorRe = regexp.MustCompile(`unsupported protocol scheme`)
)
// ReaderFunc is the type of function that can be given natively to NewRequest
type ReaderFunc func() (io.Reader, error)
// LenReader is an interface implemented by many in-memory io.Reader's. Used
// for automatically sending the right Content-Length header when possible.
type LenReader interface {
Len() int
}
// Request wraps the metadata needed to create HTTP requests.
type Request struct {
// body is a seekable reader over the request body payload. This is
// used to rewind the request data in between retries.
body ReaderFunc
// Embed an HTTP request directly. This makes a *Request act exactly
// like an *http.Request so that all meta methods are supported.
*http.Request
}
// WithContext returns wrapped Request with a shallow copy of underlying *http.Request
// with its context changed to ctx. The provided ctx must be non-nil.
func (r *Request) WithContext(ctx context.Context) *Request {
r.Request = r.Request.WithContext(ctx)
return r
}
// BodyBytes allows accessing the request body. It is an analogue to
// http.Request's Body variable, but it returns a copy of the underlying data
// rather than consuming it.
//
// This function is not thread-safe; do not call it at the same time as another
// call, or at the same time this request is being used with Client.Do.
func (r *Request) BodyBytes() ([]byte, error) {
if r.body == nil {
return nil, nil
}
body, err := r.body()
if err != nil {
return nil, err
}
buf := new(bytes.Buffer)
_, err = buf.ReadFrom(body)
if err != nil {
return nil, err
}
return buf.Bytes(), nil
}
// SetBody allows setting the request body.
//
// It is useful if a new body needs to be set without constructing a new Request.
func (r *Request) SetBody(rawBody interface{}) error {
bodyReader, contentLength, err := getBodyReaderAndContentLength(rawBody)
if err != nil {
return err
}
r.body = bodyReader
r.ContentLength = contentLength
return nil
}
// WriteTo allows copying the request body into a writer.
//
// It writes data to w until there's no more data to write or
// when an error occurs. The return int64 value is the number of bytes
// written. Any error encountered during the write is also returned.
// The signature matches io.WriterTo interface.
func (r *Request) WriteTo(w io.Writer) (int64, error) {
body, err := r.body()
if err != nil {
return 0, err
}
if c, ok := body.(io.Closer); ok {
defer c.Close()
}
return io.Copy(w, body)
}
func getBodyReaderAndContentLength(rawBody interface{}) (ReaderFunc, int64, error) {
var bodyReader ReaderFunc
var contentLength int64
switch body := rawBody.(type) {
// If they gave us a function already, great! Use it.
case ReaderFunc:
bodyReader = body
tmp, err := body()
if err != nil {
return nil, 0, err
}
if lr, ok := tmp.(LenReader); ok {
contentLength = int64(lr.Len())
}
if c, ok := tmp.(io.Closer); ok {
c.Close()
}
case func() (io.Reader, error):
bodyReader = body
tmp, err := body()
if err != nil {
return nil, 0, err
}
if lr, ok := tmp.(LenReader); ok {
contentLength = int64(lr.Len())
}
if c, ok := tmp.(io.Closer); ok {
c.Close()
}
// If a regular byte slice, we can read it over and over via new
// readers
case []byte:
buf := body
bodyReader = func() (io.Reader, error) {
return bytes.NewReader(buf), nil
}
contentLength = int64(len(buf))
// If a bytes.Buffer we can read the underlying byte slice over and
// over
case *bytes.Buffer:
buf := body
bodyReader = func() (io.Reader, error) {
return bytes.NewReader(buf.Bytes()), nil
}
contentLength = int64(buf.Len())
// We prioritize *bytes.Reader here because we don't really want to
// deal with it seeking so want it to match here instead of the
// io.ReadSeeker case.
case *bytes.Reader:
buf, err := ioutil.ReadAll(body)
if err != nil {
return nil, 0, err
}
bodyReader = func() (io.Reader, error) {
return bytes.NewReader(buf), nil
}
contentLength = int64(len(buf))
// Compat case
case io.ReadSeeker:
raw := body
bodyReader = func() (io.Reader, error) {
_, err := raw.Seek(0, 0)
return ioutil.NopCloser(raw), err
}
if lr, ok := raw.(LenReader); ok {
contentLength = int64(lr.Len())
}
// Read all in so we can reset
case io.Reader:
buf, err := ioutil.ReadAll(body)
if err != nil {
return nil, 0, err
}
bodyReader = func() (io.Reader, error) {
return bytes.NewReader(buf), nil
}
contentLength = int64(len(buf))
// No body provided, nothing to do
case nil:
// Unrecognized type
default:
return nil, 0, fmt.Errorf("cannot handle type %T", rawBody)
}
return bodyReader, contentLength, nil
}
// FromRequest wraps an http.Request in a retryablehttp.Request
func FromRequest(r *http.Request) (*Request, error) {
bodyReader, _, err := getBodyReaderAndContentLength(r.Body)
if err != nil {
return nil, err
}
// Could assert contentLength == r.ContentLength
return &Request{bodyReader, r}, nil
}
// NewRequest creates a new wrapped request.
func NewRequest(method, url string, rawBody interface{}) (*Request, error) {
bodyReader, contentLength, err := getBodyReaderAndContentLength(rawBody)
if err != nil {
return nil, err
}
httpReq, err := http.NewRequest(method, url, nil)
if err != nil {
return nil, err
}
httpReq.ContentLength = contentLength
return &Request{bodyReader, httpReq}, nil
}
// Logger interface allows to use other loggers than
// standard log.Logger.
type Logger interface {
Printf(string, ...interface{})
}
// LeveledLogger interface implements the basic methods that a logger library needs
type LeveledLogger interface {
Error(string, ...interface{})
Info(string, ...interface{})
Debug(string, ...interface{})
Warn(string, ...interface{})
}
// hookLogger adapts an LeveledLogger to Logger for use by the existing hook functions
// without changing the API.
type hookLogger struct {
LeveledLogger
}
func (h hookLogger) Printf(s string, args ...interface{}) {
h.Info(fmt.Sprintf(s, args...))
}
// RequestLogHook allows a function to run before each retry. The HTTP
// request which will be made, and the retry number (0 for the initial
// request) are available to users. The internal logger is exposed to
// consumers.
type RequestLogHook func(Logger, *http.Request, int)
// ResponseLogHook is like RequestLogHook, but allows running a function
// on each HTTP response. This function will be invoked at the end of
// every HTTP request executed, regardless of whether a subsequent retry
// needs to be performed or not. If the response body is read or closed
// from this method, this will affect the response returned from Do().
type ResponseLogHook func(Logger, *http.Response)
// CheckRetry specifies a policy for handling retries. It is called
// following each request with the response and error values returned by
// the http.Client. If CheckRetry returns false, the Client stops retrying
// and returns the response to the caller. If CheckRetry returns an error,
// that error value is returned in lieu of the error from the request. The
// Client will close any response body when retrying, but if the retry is
// aborted it is up to the CheckRetry callback to properly close any
// response body before returning.
type CheckRetry func(ctx context.Context, resp *http.Response, err error) (bool, error)
// Backoff specifies a policy for how long to wait between retries.
// It is called after a failing request to determine the amount of time
// that should pass before trying again.
type Backoff func(min, max time.Duration, attemptNum int, resp *http.Response) time.Duration
// ErrorHandler is called if retries are expired, containing the last status
// from the http library. If not specified, default behavior for the library is
// to close the body and return an error indicating how many tries were
// attempted. If overriding this, be sure to close the body if needed.
type ErrorHandler func(resp *http.Response, err error, numTries int) (*http.Response, error)
// Client is used to make HTTP requests. It adds additional functionality
// like automatic retries to tolerate minor outages.
type Client struct {
HTTPClient *http.Client // Internal HTTP client.
Logger interface{} // Customer logger instance. Can be either Logger or LeveledLogger
RetryWaitMin time.Duration // Minimum time to wait
RetryWaitMax time.Duration // Maximum time to wait
RetryMax int // Maximum number of retries
// RequestLogHook allows a user-supplied function to be called
// before each retry.
RequestLogHook RequestLogHook
// ResponseLogHook allows a user-supplied function to be called
// with the response from each HTTP request executed.
ResponseLogHook ResponseLogHook
// CheckRetry specifies the policy for handling retries, and is called
// after each request. The default policy is DefaultRetryPolicy.
CheckRetry CheckRetry
// Backoff specifies the policy for how long to wait between retries
Backoff Backoff
// ErrorHandler specifies the custom error handler to use, if any
ErrorHandler ErrorHandler
loggerInit sync.Once
}
// NewClient creates a new Client with default settings.
func NewClient() *Client {
return &Client{
HTTPClient: cleanhttp.DefaultPooledClient(),
Logger: defaultLogger,
RetryWaitMin: defaultRetryWaitMin,
RetryWaitMax: defaultRetryWaitMax,
RetryMax: defaultRetryMax,
CheckRetry: DefaultRetryPolicy,
Backoff: DefaultBackoff,
}
}
func (c *Client) logger() interface{} {
c.loggerInit.Do(func() {
if c.Logger == nil {
return
}
switch c.Logger.(type) {
case Logger, LeveledLogger:
// ok
default:
// This should happen in dev when they are setting Logger and work on code, not in prod.
panic(fmt.Sprintf("invalid logger type passed, must be Logger or LeveledLogger, was %T", c.Logger))
}
})
return c.Logger
}
// DefaultRetryPolicy provides a default callback for Client.CheckRetry, which
// will retry on connection errors and server errors.
func DefaultRetryPolicy(ctx context.Context, resp *http.Response, err error) (bool, error) {
// do not retry on context.Canceled or context.DeadlineExceeded
if ctx.Err() != nil {
return false, ctx.Err()
}
if err != nil {
if v, ok := err.(*url.Error); ok {
// Don't retry if the error was due to too many redirects.
if redirectsErrorRe.MatchString(v.Error()) {
return false, nil
}
// Don't retry if the error was due to an invalid protocol scheme.
if schemeErrorRe.MatchString(v.Error()) {
return false, nil
}
// Don't retry if the error was due to TLS cert verification failure.
if _, ok := v.Err.(x509.UnknownAuthorityError); ok {
return false, nil
}
}
// The error is likely recoverable so retry.
return true, nil
}
// Check the response code. We retry on 500-range responses to allow
// the server time to recover, as 500's are typically not permanent
// errors and may relate to outages on the server side. This will catch
// invalid response codes as well, like 0 and 999.
if resp.StatusCode == 0 || (resp.StatusCode >= 500 && resp.StatusCode != 501) {
return true, nil
}
return false, nil
}
// DefaultBackoff provides a default callback for Client.Backoff which
// will perform exponential backoff based on the attempt number and limited
// by the provided minimum and maximum durations.
func DefaultBackoff(min, max time.Duration, attemptNum int, resp *http.Response) time.Duration {
mult := math.Pow(2, float64(attemptNum)) * float64(min)
sleep := time.Duration(mult)
if float64(sleep) != mult || sleep > max {
sleep = max
}
return sleep
}
// LinearJitterBackoff provides a callback for Client.Backoff which will
// perform linear backoff based on the attempt number and with jitter to
// prevent a thundering herd.
//
// min and max here are *not* absolute values. The number to be multiplied by
// the attempt number will be chosen at random from between them, thus they are
// bounding the jitter.
//
// For instance:
// * To get strictly linear backoff of one second increasing each retry, set
// both to one second (1s, 2s, 3s, 4s, ...)
// * To get a small amount of jitter centered around one second increasing each
// retry, set to around one second, such as a min of 800ms and max of 1200ms
// (892ms, 2102ms, 2945ms, 4312ms, ...)
// * To get extreme jitter, set to a very wide spread, such as a min of 100ms
// and a max of 20s (15382ms, 292ms, 51321ms, 35234ms, ...)
func LinearJitterBackoff(min, max time.Duration, attemptNum int, resp *http.Response) time.Duration {
// attemptNum always starts at zero but we want to start at 1 for multiplication
attemptNum++
if max <= min {
// Unclear what to do here, or they are the same, so return min *
// attemptNum
return min * time.Duration(attemptNum)
}
// Seed rand; doing this every time is fine
rand := rand.New(rand.NewSource(int64(time.Now().Nanosecond())))
// Pick a random number that lies somewhere between the min and max and
// multiply by the attemptNum. attemptNum starts at zero so we always
// increment here. We first get a random percentage, then apply that to the
// difference between min and max, and add to min.
jitter := rand.Float64() * float64(max-min)
jitterMin := int64(jitter) + int64(min)
return time.Duration(jitterMin * int64(attemptNum))
}
// PassthroughErrorHandler is an ErrorHandler that directly passes through the
// values from the net/http library for the final request. The body is not
// closed.
func PassthroughErrorHandler(resp *http.Response, err error, _ int) (*http.Response, error) {
return resp, err
}
// Do wraps calling an HTTP method with retries.
func (c *Client) Do(req *Request) (*http.Response, error) {
if c.HTTPClient == nil {
c.HTTPClient = cleanhttp.DefaultPooledClient()
}
logger := c.logger()
if logger != nil {
switch v := logger.(type) {
case Logger:
v.Printf("[DEBUG] %s %s", req.Method, req.URL)
case LeveledLogger:
v.Debug("performing request", "method", req.Method, "url", req.URL)
}
}
var resp *http.Response
var err error
for i := 0; ; i++ {
var code int // HTTP response code
// Always rewind the request body when non-nil.
if req.body != nil {
body, err := req.body()
if err != nil {
c.HTTPClient.CloseIdleConnections()
return resp, err
}
if c, ok := body.(io.ReadCloser); ok {
req.Body = c
} else {
req.Body = ioutil.NopCloser(body)
}
}
if c.RequestLogHook != nil {
switch v := logger.(type) {
case Logger:
c.RequestLogHook(v, req.Request, i)
case LeveledLogger:
c.RequestLogHook(hookLogger{v}, req.Request, i)
default:
c.RequestLogHook(nil, req.Request, i)
}
}
// Attempt the request
resp, err = c.HTTPClient.Do(req.Request)
if resp != nil {
code = resp.StatusCode
}
// Check if we should continue with retries.
checkOK, checkErr := c.CheckRetry(req.Context(), resp, err)
if err != nil {
switch v := logger.(type) {
case Logger:
v.Printf("[ERR] %s %s request failed: %v", req.Method, req.URL, err)
case LeveledLogger:
v.Error("request failed", "error", err, "method", req.Method, "url", req.URL)
}
} else {
// Call this here to maintain the behavior of logging all requests,
// even if CheckRetry signals to stop.
if c.ResponseLogHook != nil {
// Call the response logger function if provided.
switch v := logger.(type) {
case Logger:
c.ResponseLogHook(v, resp)
case LeveledLogger:
c.ResponseLogHook(hookLogger{v}, resp)
default:
c.ResponseLogHook(nil, resp)
}
}
}
// Now decide if we should continue.
if !checkOK {
if checkErr != nil {
err = checkErr
}
c.HTTPClient.CloseIdleConnections()
return resp, err
}
// We do this before drainBody because there's no need for the I/O if
// we're breaking out
remain := c.RetryMax - i
if remain <= 0 {
break
}
// We're going to retry, consume any response to reuse the connection.
if err == nil && resp != nil {
c.drainBody(resp.Body)
}
wait := c.Backoff(c.RetryWaitMin, c.RetryWaitMax, i, resp)
desc := fmt.Sprintf("%s %s", req.Method, req.URL)
if code > 0 {
desc = fmt.Sprintf("%s (status: %d)", desc, code)
}
if logger != nil {
switch v := logger.(type) {
case Logger:
v.Printf("[DEBUG] %s: retrying in %s (%d left)", desc, wait, remain)
case LeveledLogger:
v.Debug("retrying request", "request", desc, "timeout", wait, "remaining", remain)
}
}
select {
case <-req.Context().Done():
c.HTTPClient.CloseIdleConnections()
return nil, req.Context().Err()
case <-time.After(wait):
}
}
if c.ErrorHandler != nil {
c.HTTPClient.CloseIdleConnections()
return c.ErrorHandler(resp, err, c.RetryMax+1)
}
// By default, we close the response body and return an error without
// returning the response
if resp != nil {
resp.Body.Close()
}
c.HTTPClient.CloseIdleConnections()
return nil, fmt.Errorf("%s %s giving up after %d attempts",
req.Method, req.URL, c.RetryMax+1)
}
// Try to read the response body so we can reuse this connection.
func (c *Client) drainBody(body io.ReadCloser) {
defer body.Close()
_, err := io.Copy(ioutil.Discard, io.LimitReader(body, respReadLimit))
if err != nil {
if c.logger() != nil {
switch v := c.logger().(type) {
case Logger:
v.Printf("[ERR] error reading response body: %v", err)
case LeveledLogger:
v.Error("error reading response body", "error", err)
}
}
}
}
// Get is a shortcut for doing a GET request without making a new client.
func Get(url string) (*http.Response, error) {
return defaultClient.Get(url)
}
// Get is a convenience helper for doing simple GET requests.
func (c *Client) Get(url string) (*http.Response, error) {
req, err := NewRequest("GET", url, nil)
if err != nil {
return nil, err
}
return c.Do(req)
}
// Head is a shortcut for doing a HEAD request without making a new client.
func Head(url string) (*http.Response, error) {
return defaultClient.Head(url)
}
// Head is a convenience method for doing simple HEAD requests.
func (c *Client) Head(url string) (*http.Response, error) {
req, err := NewRequest("HEAD", url, nil)
if err != nil {
return nil, err
}
return c.Do(req)
}
// Post is a shortcut for doing a POST request without making a new client.
func Post(url, bodyType string, body interface{}) (*http.Response, error) {
return defaultClient.Post(url, bodyType, body)
}
// Post is a convenience method for doing simple POST requests.
func (c *Client) Post(url, bodyType string, body interface{}) (*http.Response, error) {
req, err := NewRequest("POST", url, body)
if err != nil {
return nil, err
}
req.Header.Set("Content-Type", bodyType)
return c.Do(req)
}
// PostForm is a shortcut to perform a POST with form data without creating
// a new client.
func PostForm(url string, data url.Values) (*http.Response, error) {
return defaultClient.PostForm(url, data)
}
// PostForm is a convenience method for doing simple POST operations using
// pre-filled url.Values form data.
func (c *Client) PostForm(url string, data url.Values) (*http.Response, error) {
return c.Post(url, "application/x-www-form-urlencoded", strings.NewReader(data.Encode()))
}
// StandardClient returns a stdlib *http.Client with a custom Transport, which
// shims in a *retryablehttp.Client for added retries.
func (c *Client) StandardClient() *http.Client {
return &http.Client{
Transport: &RoundTripper{Client: c},
}
}

8
vendor/github.com/hashicorp/go-retryablehttp/go.mod generated vendored Normal file
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@ -0,0 +1,8 @@
module github.com/hashicorp/go-retryablehttp
require (
github.com/hashicorp/go-cleanhttp v0.5.1
github.com/hashicorp/go-hclog v0.9.2
)
go 1.13

10
vendor/github.com/hashicorp/go-retryablehttp/go.sum generated vendored Normal file
View File

@ -0,0 +1,10 @@
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/hashicorp/go-cleanhttp v0.5.1 h1:dH3aiDG9Jvb5r5+bYHsikaOUIpcM0xvgMXVoDkXMzJM=
github.com/hashicorp/go-cleanhttp v0.5.1/go.mod h1:JpRdi6/HCYpAwUzNwuwqhbovhLtngrth3wmdIIUrZ80=
github.com/hashicorp/go-hclog v0.9.2 h1:CG6TE5H9/JXsFWJCfoIVpKFIkFe6ysEuHirp4DxCsHI=
github.com/hashicorp/go-hclog v0.9.2/go.mod h1:5CU+agLiy3J7N7QjHK5d05KxGsuXiQLrjA0H7acj2lQ=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=

43
vendor/github.com/hashicorp/go-retryablehttp/roundtripper.go generated vendored Normal file
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@ -0,0 +1,43 @@
package retryablehttp
import (
"net/http"
"sync"
)
// RoundTripper implements the http.RoundTripper interface, using a retrying
// HTTP client to execute requests.
//
// It is important to note that retryablehttp doesn't always act exactly as a
// RoundTripper should. This is highly dependent on the retryable client's
// configuration.
type RoundTripper struct {
// The client to use during requests. If nil, the default retryablehttp
// client and settings will be used.
Client *Client
// once ensures that the logic to initialize the default client runs at
// most once, in a single thread.
once sync.Once
}
// init initializes the underlying retryable client.
func (rt *RoundTripper) init() {
if rt.Client == nil {
rt.Client = NewClient()
}
}
// RoundTrip satisfies the http.RoundTripper interface.
func (rt *RoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
rt.once.Do(rt.init)
// Convert the request to be retryable.
retryableReq, err := FromRequest(req)
if err != nil {
return nil, err
}
// Execute the request.
return rt.Client.Do(retryableReq)
}

12
vendor/github.com/hashicorp/go-rootcerts/.travis.yml generated vendored Normal file
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@ -0,0 +1,12 @@
sudo: false
language: go
go:
- 1.6
branches:
only:
- master
script: make test

363
vendor/github.com/hashicorp/go-rootcerts/LICENSE generated vendored Normal file
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@ -0,0 +1,363 @@
Mozilla Public License, version 2.0
1. Definitions
1.1. "Contributor"
means each individual or legal entity that creates, contributes to the
creation of, or owns Covered Software.
1.2. "Contributor Version"
means the combination of the Contributions of others (if any) used by a
Contributor and that particular Contributor's Contribution.
1.3. "Contribution"
means Covered Software of a particular Contributor.
1.4. "Covered Software"
means Source Code Form to which the initial Contributor has attached the
notice in Exhibit A, the Executable Form of such Source Code Form, and
Modifications of such Source Code Form, in each case including portions
thereof.
1.5. "Incompatible With Secondary Licenses"
means
a. that the initial Contributor has attached the notice described in
Exhibit B to the Covered Software; or
b. that the Covered Software was made available under the terms of
version 1.1 or earlier of the License, but not also under the terms of
a Secondary License.
1.6. "Executable Form"
means any form of the work other than Source Code Form.
1.7. "Larger Work"
means a work that combines Covered Software with other material, in a
separate file or files, that is not Covered Software.
1.8. "License"
means this document.
1.9. "Licensable"
means having the right to grant, to the maximum extent possible, whether
at the time of the initial grant or subsequently, any and all of the
rights conveyed by this License.
1.10. "Modifications"
means any of the following:
a. any file in Source Code Form that results from an addition to,
deletion from, or modification of the contents of Covered Software; or
b. any new file in Source Code Form that contains any Covered Software.
1.11. "Patent Claims" of a Contributor
means any patent claim(s), including without limitation, method,
process, and apparatus claims, in any patent Licensable by such
Contributor that would be infringed, but for the grant of the License,
by the making, using, selling, offering for sale, having made, import,
or transfer of either its Contributions or its Contributor Version.
1.12. "Secondary License"
means either the GNU General Public License, Version 2.0, the GNU Lesser
General Public License, Version 2.1, the GNU Affero General Public
License, Version 3.0, or any later versions of those licenses.
1.13. "Source Code Form"
means the form of the work preferred for making modifications.
1.14. "You" (or "Your")
means an individual or a legal entity exercising rights under this
License. For legal entities, "You" includes any entity that controls, is
controlled by, or is under common control with You. For purposes of this
definition, "control" means (a) the power, direct or indirect, to cause
the direction or management of such entity, whether by contract or
otherwise, or (b) ownership of more than fifty percent (50%) of the
outstanding shares or beneficial ownership of such entity.
2. License Grants and Conditions
2.1. Grants
Each Contributor hereby grants You a world-wide, royalty-free,
non-exclusive license:
a. under intellectual property rights (other than patent or trademark)
Licensable by such Contributor to use, reproduce, make available,
modify, display, perform, distribute, and otherwise exploit its
Contributions, either on an unmodified basis, with Modifications, or
as part of a Larger Work; and
b. under Patent Claims of such Contributor to make, use, sell, offer for
sale, have made, import, and otherwise transfer either its
Contributions or its Contributor Version.
2.2. Effective Date
The licenses granted in Section 2.1 with respect to any Contribution
become effective for each Contribution on the date the Contributor first
distributes such Contribution.
2.3. Limitations on Grant Scope
The licenses granted in this Section 2 are the only rights granted under
this License. No additional rights or licenses will be implied from the
distribution or licensing of Covered Software under this License.
Notwithstanding Section 2.1(b) above, no patent license is granted by a
Contributor:
a. for any code that a Contributor has removed from Covered Software; or
b. for infringements caused by: (i) Your and any other third party's
modifications of Covered Software, or (ii) the combination of its
Contributions with other software (except as part of its Contributor
Version); or
c. under Patent Claims infringed by Covered Software in the absence of
its Contributions.
This License does not grant any rights in the trademarks, service marks,
or logos of any Contributor (except as may be necessary to comply with
the notice requirements in Section 3.4).
2.4. Subsequent Licenses
No Contributor makes additional grants as a result of Your choice to
distribute the Covered Software under a subsequent version of this
License (see Section 10.2) or under the terms of a Secondary License (if
permitted under the terms of Section 3.3).
2.5. Representation
Each Contributor represents that the Contributor believes its
Contributions are its original creation(s) or it has sufficient rights to
grant the rights to its Contributions conveyed by this License.
2.6. Fair Use
This License is not intended to limit any rights You have under
applicable copyright doctrines of fair use, fair dealing, or other
equivalents.
2.7. Conditions
Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted in
Section 2.1.
3. Responsibilities
3.1. Distribution of Source Form
All distribution of Covered Software in Source Code Form, including any
Modifications that You create or to which You contribute, must be under
the terms of this License. You must inform recipients that the Source
Code Form of the Covered Software is governed by the terms of this
License, and how they can obtain a copy of this License. You may not
attempt to alter or restrict the recipients' rights in the Source Code
Form.
3.2. Distribution of Executable Form
If You distribute Covered Software in Executable Form then:
a. such Covered Software must also be made available in Source Code Form,
as described in Section 3.1, and You must inform recipients of the
Executable Form how they can obtain a copy of such Source Code Form by
reasonable means in a timely manner, at a charge no more than the cost
of distribution to the recipient; and
b. You may distribute such Executable Form under the terms of this
License, or sublicense it under different terms, provided that the
license for the Executable Form does not attempt to limit or alter the
recipients' rights in the Source Code Form under this License.
3.3. Distribution of a Larger Work
You may create and distribute a Larger Work under terms of Your choice,
provided that You also comply with the requirements of this License for
the Covered Software. If the Larger Work is a combination of Covered
Software with a work governed by one or more Secondary Licenses, and the
Covered Software is not Incompatible With Secondary Licenses, this
License permits You to additionally distribute such Covered Software
under the terms of such Secondary License(s), so that the recipient of
the Larger Work may, at their option, further distribute the Covered
Software under the terms of either this License or such Secondary
License(s).
3.4. Notices
You may not remove or alter the substance of any license notices
(including copyright notices, patent notices, disclaimers of warranty, or
limitations of liability) contained within the Source Code Form of the
Covered Software, except that You may alter any license notices to the
extent required to remedy known factual inaccuracies.
3.5. Application of Additional Terms
You may choose to offer, and to charge a fee for, warranty, support,
indemnity or liability obligations to one or more recipients of Covered
Software. However, You may do so only on Your own behalf, and not on
behalf of any Contributor. You must make it absolutely clear that any
such warranty, support, indemnity, or liability obligation is offered by
You alone, and You hereby agree to indemnify every Contributor for any
liability incurred by such Contributor as a result of warranty, support,
indemnity or liability terms You offer. You may include additional
disclaimers of warranty and limitations of liability specific to any
jurisdiction.
4. Inability to Comply Due to Statute or Regulation
If it is impossible for You to comply with any of the terms of this License
with respect to some or all of the Covered Software due to statute,
judicial order, or regulation then You must: (a) comply with the terms of
this License to the maximum extent possible; and (b) describe the
limitations and the code they affect. Such description must be placed in a
text file included with all distributions of the Covered Software under
this License. Except to the extent prohibited by statute or regulation,
such description must be sufficiently detailed for a recipient of ordinary
skill to be able to understand it.
5. Termination
5.1. The rights granted under this License will terminate automatically if You
fail to comply with any of its terms. However, if You become compliant,
then the rights granted under this License from a particular Contributor
are reinstated (a) provisionally, unless and until such Contributor
explicitly and finally terminates Your grants, and (b) on an ongoing
basis, if such Contributor fails to notify You of the non-compliance by
some reasonable means prior to 60 days after You have come back into
compliance. Moreover, Your grants from a particular Contributor are
reinstated on an ongoing basis if such Contributor notifies You of the
non-compliance by some reasonable means, this is the first time You have
received notice of non-compliance with this License from such
Contributor, and You become compliant prior to 30 days after Your receipt
of the notice.
5.2. If You initiate litigation against any entity by asserting a patent
infringement claim (excluding declaratory judgment actions,
counter-claims, and cross-claims) alleging that a Contributor Version
directly or indirectly infringes any patent, then the rights granted to
You by any and all Contributors for the Covered Software under Section
2.1 of this License shall terminate.
5.3. In the event of termination under Sections 5.1 or 5.2 above, all end user
license agreements (excluding distributors and resellers) which have been
validly granted by You or Your distributors under this License prior to
termination shall survive termination.
6. Disclaimer of Warranty
Covered Software is provided under this License on an "as is" basis,
without warranty of any kind, either expressed, implied, or statutory,
including, without limitation, warranties that the Covered Software is free
of defects, merchantable, fit for a particular purpose or non-infringing.
The entire risk as to the quality and performance of the Covered Software
is with You. Should any Covered Software prove defective in any respect,
You (not any Contributor) assume the cost of any necessary servicing,
repair, or correction. This disclaimer of warranty constitutes an essential
part of this License. No use of any Covered Software is authorized under
this License except under this disclaimer.
7. Limitation of Liability
Under no circumstances and under no legal theory, whether tort (including
negligence), contract, or otherwise, shall any Contributor, or anyone who
distributes Covered Software as permitted above, be liable to You for any
direct, indirect, special, incidental, or consequential damages of any
character including, without limitation, damages for lost profits, loss of
goodwill, work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses, even if such party shall have been
informed of the possibility of such damages. This limitation of liability
shall not apply to liability for death or personal injury resulting from
such party's negligence to the extent applicable law prohibits such
limitation. Some jurisdictions do not allow the exclusion or limitation of
incidental or consequential damages, so this exclusion and limitation may
not apply to You.
8. Litigation
Any litigation relating to this License may be brought only in the courts
of a jurisdiction where the defendant maintains its principal place of
business and such litigation shall be governed by laws of that
jurisdiction, without reference to its conflict-of-law provisions. Nothing
in this Section shall prevent a party's ability to bring cross-claims or
counter-claims.
9. Miscellaneous
This License represents the complete agreement concerning the subject
matter hereof. If any provision of this License is held to be
unenforceable, such provision shall be reformed only to the extent
necessary to make it enforceable. Any law or regulation which provides that
the language of a contract shall be construed against the drafter shall not
be used to construe this License against a Contributor.
10. Versions of the License
10.1. New Versions
Mozilla Foundation is the license steward. Except as provided in Section
10.3, no one other than the license steward has the right to modify or
publish new versions of this License. Each version will be given a
distinguishing version number.
10.2. Effect of New Versions
You may distribute the Covered Software under the terms of the version
of the License under which You originally received the Covered Software,
or under the terms of any subsequent version published by the license
steward.
10.3. Modified Versions
If you create software not governed by this License, and you want to
create a new license for such software, you may create and use a
modified version of this License if you rename the license and remove
any references to the name of the license steward (except to note that
such modified license differs from this License).
10.4. Distributing Source Code Form that is Incompatible With Secondary
Licenses If You choose to distribute Source Code Form that is
Incompatible With Secondary Licenses under the terms of this version of
the License, the notice described in Exhibit B of this License must be
attached.
Exhibit A - Source Code Form License Notice
This Source Code Form is subject to the
terms of the Mozilla Public License, v.
2.0. If a copy of the MPL was not
distributed with this file, You can
obtain one at
http://mozilla.org/MPL/2.0/.
If it is not possible or desirable to put the notice in a particular file,
then You may include the notice in a location (such as a LICENSE file in a
relevant directory) where a recipient would be likely to look for such a
notice.
You may add additional accurate notices of copyright ownership.
Exhibit B - "Incompatible With Secondary Licenses" Notice
This Source Code Form is "Incompatible
With Secondary Licenses", as defined by
the Mozilla Public License, v. 2.0.

8
vendor/github.com/hashicorp/go-rootcerts/Makefile generated vendored Normal file
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@ -0,0 +1,8 @@
TEST?=./...
test:
go test $(TEST) $(TESTARGS) -timeout=3s -parallel=4
go vet $(TEST)
go test $(TEST) -race
.PHONY: test

44
vendor/github.com/hashicorp/go-rootcerts/README.md generated vendored Normal file
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# rootcerts
Functions for loading root certificates for TLS connections.
-----
Go's standard library `crypto/tls` provides a common mechanism for configuring
TLS connections in `tls.Config`. The `RootCAs` field on this struct is a pool
of certificates for the client to use as a trust store when verifying server
certificates.
This library contains utility functions for loading certificates destined for
that field, as well as one other important thing:
When the `RootCAs` field is `nil`, the standard library attempts to load the
host's root CA set. This behavior is OS-specific, and the Darwin
implementation contains [a bug that prevents trusted certificates from the
System and Login keychains from being loaded][1]. This library contains
Darwin-specific behavior that works around that bug.
[1]: https://github.com/golang/go/issues/14514
## Example Usage
Here's a snippet demonstrating how this library is meant to be used:
```go
func httpClient() (*http.Client, error)
tlsConfig := &tls.Config{}
err := rootcerts.ConfigureTLS(tlsConfig, &rootcerts.Config{
CAFile: os.Getenv("MYAPP_CAFILE"),
CAPath: os.Getenv("MYAPP_CAPATH"),
Certificate: os.Getenv("MYAPP_CERTIFICATE"),
})
if err != nil {
return nil, err
}
c := cleanhttp.DefaultClient()
t := cleanhttp.DefaultTransport()
t.TLSClientConfig = tlsConfig
c.Transport = t
return c, nil
}
```

9
vendor/github.com/hashicorp/go-rootcerts/doc.go generated vendored Normal file
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@ -0,0 +1,9 @@
// Package rootcerts contains functions to aid in loading CA certificates for
// TLS connections.
//
// In addition, its default behavior on Darwin works around an open issue [1]
// in Go's crypto/x509 that prevents certicates from being loaded from the
// System or Login keychains.
//
// [1] https://github.com/golang/go/issues/14514
package rootcerts

5
vendor/github.com/hashicorp/go-rootcerts/go.mod generated vendored Normal file
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@ -0,0 +1,5 @@
module github.com/hashicorp/go-rootcerts
go 1.12
require github.com/mitchellh/go-homedir v1.1.0

2
vendor/github.com/hashicorp/go-rootcerts/go.sum generated vendored Normal file
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@ -0,0 +1,2 @@
github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=

123
vendor/github.com/hashicorp/go-rootcerts/rootcerts.go generated vendored Normal file
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@ -0,0 +1,123 @@
package rootcerts
import (
"crypto/tls"
"crypto/x509"
"errors"
"fmt"
"io/ioutil"
"os"
"path/filepath"
)
// Config determines where LoadCACerts will load certificates from. When CAFile,
// CACertificate and CAPath are blank, this library's functions will either load
// system roots explicitly and return them, or set the CertPool to nil to allow
// Go's standard library to load system certs.
type Config struct {
// CAFile is a path to a PEM-encoded certificate file or bundle. Takes
// precedence over CACertificate and CAPath.
CAFile string
// CACertificate is a PEM-encoded certificate or bundle. Takes precedence
// over CAPath.
CACertificate []byte
// CAPath is a path to a directory populated with PEM-encoded certificates.
CAPath string
}
// ConfigureTLS sets up the RootCAs on the provided tls.Config based on the
// Config specified.
func ConfigureTLS(t *tls.Config, c *Config) error {
if t == nil {
return nil
}
pool, err := LoadCACerts(c)
if err != nil {
return err
}
t.RootCAs = pool
return nil
}
// LoadCACerts loads a CertPool based on the Config specified.
func LoadCACerts(c *Config) (*x509.CertPool, error) {
if c == nil {
c = &Config{}
}
if c.CAFile != "" {
return LoadCAFile(c.CAFile)
}
if len(c.CACertificate) != 0 {
return AppendCertificate(c.CACertificate)
}
if c.CAPath != "" {
return LoadCAPath(c.CAPath)
}
return LoadSystemCAs()
}
// LoadCAFile loads a single PEM-encoded file from the path specified.
func LoadCAFile(caFile string) (*x509.CertPool, error) {
pool := x509.NewCertPool()
pem, err := ioutil.ReadFile(caFile)
if err != nil {
return nil, fmt.Errorf("Error loading CA File: %s", err)
}
ok := pool.AppendCertsFromPEM(pem)
if !ok {
return nil, fmt.Errorf("Error loading CA File: Couldn't parse PEM in: %s", caFile)
}
return pool, nil
}
// AppendCertificate appends an in-memory PEM-encoded certificate or bundle and returns a pool.
func AppendCertificate(ca []byte) (*x509.CertPool, error) {
pool := x509.NewCertPool()
ok := pool.AppendCertsFromPEM(ca)
if !ok {
return nil, errors.New("Error appending CA: Couldn't parse PEM")
}
return pool, nil
}
// LoadCAPath walks the provided path and loads all certificates encounted into
// a pool.
func LoadCAPath(caPath string) (*x509.CertPool, error) {
pool := x509.NewCertPool()
walkFn := func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
if info.IsDir() {
return nil
}
pem, err := ioutil.ReadFile(path)
if err != nil {
return fmt.Errorf("Error loading file from CAPath: %s", err)
}
ok := pool.AppendCertsFromPEM(pem)
if !ok {
return fmt.Errorf("Error loading CA Path: Couldn't parse PEM in: %s", path)
}
return nil
}
err := filepath.Walk(caPath, walkFn)
if err != nil {
return nil, err
}
return pool, nil
}

12
vendor/github.com/hashicorp/go-rootcerts/rootcerts_base.go generated vendored Normal file
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@ -0,0 +1,12 @@
// +build !darwin
package rootcerts
import "crypto/x509"
// LoadSystemCAs does nothing on non-Darwin systems. We return nil so that
// default behavior of standard TLS config libraries is triggered, which is to
// load system certs.
func LoadSystemCAs() (*x509.CertPool, error) {
return nil, nil
}

48
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@ -0,0 +1,48 @@
package rootcerts
import (
"crypto/x509"
"os/exec"
"path"
"github.com/mitchellh/go-homedir"
)
// LoadSystemCAs has special behavior on Darwin systems to work around
func LoadSystemCAs() (*x509.CertPool, error) {
pool := x509.NewCertPool()
for _, keychain := range certKeychains() {
err := addCertsFromKeychain(pool, keychain)
if err != nil {
return nil, err
}
}
return pool, nil
}
func addCertsFromKeychain(pool *x509.CertPool, keychain string) error {
cmd := exec.Command("/usr/bin/security", "find-certificate", "-a", "-p", keychain)
data, err := cmd.Output()
if err != nil {
return err
}
pool.AppendCertsFromPEM(data)
return nil
}
func certKeychains() []string {
keychains := []string{
"/System/Library/Keychains/SystemRootCertificates.keychain",
"/Library/Keychains/System.keychain",
}
home, err := homedir.Dir()
if err == nil {
loginKeychain := path.Join(home, "Library", "Keychains", "login.keychain")
keychains = append(keychains, loginKeychain)
}
return keychains
}

26
vendor/github.com/hashicorp/go-sockaddr/.gitignore generated vendored Normal file
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# Compiled Object files, Static and Dynamic libs (Shared Objects)
*.o
*.a
*.so
# Folders
_obj
_test
# Architecture specific extensions/prefixes
*.[568vq]
[568vq].out
*.cgo1.go
*.cgo2.c
_cgo_defun.c
_cgo_gotypes.go
_cgo_export.*
_testmain.go
*.exe
*.test
*.prof
.cover.out*
coverage.html

65
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TOOLS= golang.org/x/tools/cover
GOCOVER_TMPFILE?= $(GOCOVER_FILE).tmp
GOCOVER_FILE?= .cover.out
GOCOVERHTML?= coverage.html
FIND=`/usr/bin/which 2> /dev/null gfind find | /usr/bin/grep -v ^no | /usr/bin/head -n 1`
XARGS=`/usr/bin/which 2> /dev/null gxargs xargs | /usr/bin/grep -v ^no | /usr/bin/head -n 1`
test:: $(GOCOVER_FILE)
@$(MAKE) -C cmd/sockaddr test
cover:: coverage_report
$(GOCOVER_FILE)::
@${FIND} . -type d ! -path '*cmd*' ! -path '*.git*' -print0 | ${XARGS} -0 -I % sh -ec "cd % && rm -f $(GOCOVER_TMPFILE) && go test -coverprofile=$(GOCOVER_TMPFILE)"
@echo 'mode: set' > $(GOCOVER_FILE)
@${FIND} . -type f ! -path '*cmd*' ! -path '*.git*' -name "$(GOCOVER_TMPFILE)" -print0 | ${XARGS} -0 -n1 cat $(GOCOVER_TMPFILE) | grep -v '^mode: ' >> ${PWD}/$(GOCOVER_FILE)
$(GOCOVERHTML): $(GOCOVER_FILE)
go tool cover -html=$(GOCOVER_FILE) -o $(GOCOVERHTML)
coverage_report:: $(GOCOVER_FILE)
go tool cover -html=$(GOCOVER_FILE)
audit_tools::
@go get -u github.com/golang/lint/golint && echo "Installed golint:"
@go get -u github.com/fzipp/gocyclo && echo "Installed gocyclo:"
@go get -u github.com/remyoudompheng/go-misc/deadcode && echo "Installed deadcode:"
@go get -u github.com/client9/misspell/cmd/misspell && echo "Installed misspell:"
@go get -u github.com/gordonklaus/ineffassign && echo "Installed ineffassign:"
audit::
deadcode
go tool vet -all *.go
go tool vet -shadow=true *.go
golint *.go
ineffassign .
gocyclo -over 65 *.go
misspell *.go
clean::
rm -f $(GOCOVER_FILE) $(GOCOVERHTML)
dev::
@go build
@$(MAKE) -B -C cmd/sockaddr sockaddr
install::
@go install
@$(MAKE) -C cmd/sockaddr install
doc::
@echo Visit: http://127.0.0.1:6161/pkg/github.com/hashicorp/go-sockaddr/
godoc -http=:6161 -goroot $GOROOT
world::
@set -e; \
for os in solaris darwin freebsd linux windows android; do \
for arch in amd64; do \
printf "Building on %s-%s\n" "$${os}" "$${arch}" ; \
env GOOS="$${os}" GOARCH="$${arch}" go build -o /dev/null; \
done; \
done
$(MAKE) -C cmd/sockaddr world

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Mozilla Public License Version 2.0
==================================
1. Definitions
--------------
1.1. "Contributor"
means each individual or legal entity that creates, contributes to
the creation of, or owns Covered Software.
1.2. "Contributor Version"
means the combination of the Contributions of others (if any) used
by a Contributor and that particular Contributor's Contribution.
1.3. "Contribution"
means Covered Software of a particular Contributor.
1.4. "Covered Software"
means Source Code Form to which the initial Contributor has attached
the notice in Exhibit A, the Executable Form of such Source Code
Form, and Modifications of such Source Code Form, in each case
including portions thereof.
1.5. "Incompatible With Secondary Licenses"
means
(a) that the initial Contributor has attached the notice described
in Exhibit B to the Covered Software; or
(b) that the Covered Software was made available under the terms of
version 1.1 or earlier of the License, but not also under the
terms of a Secondary License.
1.6. "Executable Form"
means any form of the work other than Source Code Form.
1.7. "Larger Work"
means a work that combines Covered Software with other material, in
a separate file or files, that is not Covered Software.
1.8. "License"
means this document.
1.9. "Licensable"
means having the right to grant, to the maximum extent possible,
whether at the time of the initial grant or subsequently, any and
all of the rights conveyed by this License.
1.10. "Modifications"
means any of the following:
(a) any file in Source Code Form that results from an addition to,
deletion from, or modification of the contents of Covered
Software; or
(b) any new file in Source Code Form that contains any Covered
Software.
1.11. "Patent Claims" of a Contributor
means any patent claim(s), including without limitation, method,
process, and apparatus claims, in any patent Licensable by such
Contributor that would be infringed, but for the grant of the
License, by the making, using, selling, offering for sale, having
made, import, or transfer of either its Contributions or its
Contributor Version.
1.12. "Secondary License"
means either the GNU General Public License, Version 2.0, the GNU
Lesser General Public License, Version 2.1, the GNU Affero General
Public License, Version 3.0, or any later versions of those
licenses.
1.13. "Source Code Form"
means the form of the work preferred for making modifications.
1.14. "You" (or "Your")
means an individual or a legal entity exercising rights under this
License. For legal entities, "You" includes any entity that
controls, is controlled by, or is under common control with You. For
purposes of this definition, "control" means (a) the power, direct
or indirect, to cause the direction or management of such entity,
whether by contract or otherwise, or (b) ownership of more than
fifty percent (50%) of the outstanding shares or beneficial
ownership of such entity.
2. License Grants and Conditions
--------------------------------
2.1. Grants
Each Contributor hereby grants You a world-wide, royalty-free,
non-exclusive license:
(a) under intellectual property rights (other than patent or trademark)
Licensable by such Contributor to use, reproduce, make available,
modify, display, perform, distribute, and otherwise exploit its
Contributions, either on an unmodified basis, with Modifications, or
as part of a Larger Work; and
(b) under Patent Claims of such Contributor to make, use, sell, offer
for sale, have made, import, and otherwise transfer either its
Contributions or its Contributor Version.
2.2. Effective Date
The licenses granted in Section 2.1 with respect to any Contribution
become effective for each Contribution on the date the Contributor first
distributes such Contribution.
2.3. Limitations on Grant Scope
The licenses granted in this Section 2 are the only rights granted under
this License. No additional rights or licenses will be implied from the
distribution or licensing of Covered Software under this License.
Notwithstanding Section 2.1(b) above, no patent license is granted by a
Contributor:
(a) for any code that a Contributor has removed from Covered Software;
or
(b) for infringements caused by: (i) Your and any other third party's
modifications of Covered Software, or (ii) the combination of its
Contributions with other software (except as part of its Contributor
Version); or
(c) under Patent Claims infringed by Covered Software in the absence of
its Contributions.
This License does not grant any rights in the trademarks, service marks,
or logos of any Contributor (except as may be necessary to comply with
the notice requirements in Section 3.4).
2.4. Subsequent Licenses
No Contributor makes additional grants as a result of Your choice to
distribute the Covered Software under a subsequent version of this
License (see Section 10.2) or under the terms of a Secondary License (if
permitted under the terms of Section 3.3).
2.5. Representation
Each Contributor represents that the Contributor believes its
Contributions are its original creation(s) or it has sufficient rights
to grant the rights to its Contributions conveyed by this License.
2.6. Fair Use
This License is not intended to limit any rights You have under
applicable copyright doctrines of fair use, fair dealing, or other
equivalents.
2.7. Conditions
Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
in Section 2.1.
3. Responsibilities
-------------------
3.1. Distribution of Source Form
All distribution of Covered Software in Source Code Form, including any
Modifications that You create or to which You contribute, must be under
the terms of this License. You must inform recipients that the Source
Code Form of the Covered Software is governed by the terms of this
License, and how they can obtain a copy of this License. You may not
attempt to alter or restrict the recipients' rights in the Source Code
Form.
3.2. Distribution of Executable Form
If You distribute Covered Software in Executable Form then:
(a) such Covered Software must also be made available in Source Code
Form, as described in Section 3.1, and You must inform recipients of
the Executable Form how they can obtain a copy of such Source Code
Form by reasonable means in a timely manner, at a charge no more
than the cost of distribution to the recipient; and
(b) You may distribute such Executable Form under the terms of this
License, or sublicense it under different terms, provided that the
license for the Executable Form does not attempt to limit or alter
the recipients' rights in the Source Code Form under this License.
3.3. Distribution of a Larger Work
You may create and distribute a Larger Work under terms of Your choice,
provided that You also comply with the requirements of this License for
the Covered Software. If the Larger Work is a combination of Covered
Software with a work governed by one or more Secondary Licenses, and the
Covered Software is not Incompatible With Secondary Licenses, this
License permits You to additionally distribute such Covered Software
under the terms of such Secondary License(s), so that the recipient of
the Larger Work may, at their option, further distribute the Covered
Software under the terms of either this License or such Secondary
License(s).
3.4. Notices
You may not remove or alter the substance of any license notices
(including copyright notices, patent notices, disclaimers of warranty,
or limitations of liability) contained within the Source Code Form of
the Covered Software, except that You may alter any license notices to
the extent required to remedy known factual inaccuracies.
3.5. Application of Additional Terms
You may choose to offer, and to charge a fee for, warranty, support,
indemnity or liability obligations to one or more recipients of Covered
Software. However, You may do so only on Your own behalf, and not on
behalf of any Contributor. You must make it absolutely clear that any
such warranty, support, indemnity, or liability obligation is offered by
You alone, and You hereby agree to indemnify every Contributor for any
liability incurred by such Contributor as a result of warranty, support,
indemnity or liability terms You offer. You may include additional
disclaimers of warranty and limitations of liability specific to any
jurisdiction.
4. Inability to Comply Due to Statute or Regulation
---------------------------------------------------
If it is impossible for You to comply with any of the terms of this
License with respect to some or all of the Covered Software due to
statute, judicial order, or regulation then You must: (a) comply with
the terms of this License to the maximum extent possible; and (b)
describe the limitations and the code they affect. Such description must
be placed in a text file included with all distributions of the Covered
Software under this License. Except to the extent prohibited by statute
or regulation, such description must be sufficiently detailed for a
recipient of ordinary skill to be able to understand it.
5. Termination
--------------
5.1. The rights granted under this License will terminate automatically
if You fail to comply with any of its terms. However, if You become
compliant, then the rights granted under this License from a particular
Contributor are reinstated (a) provisionally, unless and until such
Contributor explicitly and finally terminates Your grants, and (b) on an
ongoing basis, if such Contributor fails to notify You of the
non-compliance by some reasonable means prior to 60 days after You have
come back into compliance. Moreover, Your grants from a particular
Contributor are reinstated on an ongoing basis if such Contributor
notifies You of the non-compliance by some reasonable means, this is the
first time You have received notice of non-compliance with this License
from such Contributor, and You become compliant prior to 30 days after
Your receipt of the notice.
5.2. If You initiate litigation against any entity by asserting a patent
infringement claim (excluding declaratory judgment actions,
counter-claims, and cross-claims) alleging that a Contributor Version
directly or indirectly infringes any patent, then the rights granted to
You by any and all Contributors for the Covered Software under Section
2.1 of this License shall terminate.
5.3. In the event of termination under Sections 5.1 or 5.2 above, all
end user license agreements (excluding distributors and resellers) which
have been validly granted by You or Your distributors under this License
prior to termination shall survive termination.
************************************************************************
* *
* 6. Disclaimer of Warranty *
* ------------------------- *
* *
* Covered Software is provided under this License on an "as is" *
* basis, without warranty of any kind, either expressed, implied, or *
* statutory, including, without limitation, warranties that the *
* Covered Software is free of defects, merchantable, fit for a *
* particular purpose or non-infringing. The entire risk as to the *
* quality and performance of the Covered Software is with You. *
* Should any Covered Software prove defective in any respect, You *
* (not any Contributor) assume the cost of any necessary servicing, *
* repair, or correction. This disclaimer of warranty constitutes an *
* essential part of this License. No use of any Covered Software is *
* authorized under this License except under this disclaimer. *
* *
************************************************************************
************************************************************************
* *
* 7. Limitation of Liability *
* -------------------------- *
* *
* Under no circumstances and under no legal theory, whether tort *
* (including negligence), contract, or otherwise, shall any *
* Contributor, or anyone who distributes Covered Software as *
* permitted above, be liable to You for any direct, indirect, *
* special, incidental, or consequential damages of any character *
* including, without limitation, damages for lost profits, loss of *
* goodwill, work stoppage, computer failure or malfunction, or any *
* and all other commercial damages or losses, even if such party *
* shall have been informed of the possibility of such damages. This *
* limitation of liability shall not apply to liability for death or *
* personal injury resulting from such party's negligence to the *
* extent applicable law prohibits such limitation. Some *
* jurisdictions do not allow the exclusion or limitation of *
* incidental or consequential damages, so this exclusion and *
* limitation may not apply to You. *
* *
************************************************************************
8. Litigation
-------------
Any litigation relating to this License may be brought only in the
courts of a jurisdiction where the defendant maintains its principal
place of business and such litigation shall be governed by laws of that
jurisdiction, without reference to its conflict-of-law provisions.
Nothing in this Section shall prevent a party's ability to bring
cross-claims or counter-claims.
9. Miscellaneous
----------------
This License represents the complete agreement concerning the subject
matter hereof. If any provision of this License is held to be
unenforceable, such provision shall be reformed only to the extent
necessary to make it enforceable. Any law or regulation which provides
that the language of a contract shall be construed against the drafter
shall not be used to construe this License against a Contributor.
10. Versions of the License
---------------------------
10.1. New Versions
Mozilla Foundation is the license steward. Except as provided in Section
10.3, no one other than the license steward has the right to modify or
publish new versions of this License. Each version will be given a
distinguishing version number.
10.2. Effect of New Versions
You may distribute the Covered Software under the terms of the version
of the License under which You originally received the Covered Software,
or under the terms of any subsequent version published by the license
steward.
10.3. Modified Versions
If you create software not governed by this License, and you want to
create a new license for such software, you may create and use a
modified version of this License if you rename the license and remove
any references to the name of the license steward (except to note that
such modified license differs from this License).
10.4. Distributing Source Code Form that is Incompatible With Secondary
Licenses
If You choose to distribute Source Code Form that is Incompatible With
Secondary Licenses under the terms of this version of the License, the
notice described in Exhibit B of this License must be attached.
Exhibit A - Source Code Form License Notice
-------------------------------------------
This Source Code Form is subject to the terms of the Mozilla Public
License, v. 2.0. If a copy of the MPL was not distributed with this
file, You can obtain one at http://mozilla.org/MPL/2.0/.
If it is not possible or desirable to put the notice in a particular
file, then You may include the notice in a location (such as a LICENSE
file in a relevant directory) where a recipient would be likely to look
for such a notice.
You may add additional accurate notices of copyright ownership.
Exhibit B - "Incompatible With Secondary Licenses" Notice
---------------------------------------------------------
This Source Code Form is "Incompatible With Secondary Licenses", as
defined by the Mozilla Public License, v. 2.0.

118
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# go-sockaddr
## `sockaddr` Library
Socket address convenience functions for Go. `go-sockaddr` is a convenience
library that makes doing the right thing with IP addresses easy. `go-sockaddr`
is loosely modeled after the UNIX `sockaddr_t` and creates a union of the family
of `sockaddr_t` types (see below for an ascii diagram). Library documentation
is available
at
[https://godoc.org/github.com/hashicorp/go-sockaddr](https://godoc.org/github.com/hashicorp/go-sockaddr).
The primary intent of the library was to make it possible to define heuristics
for selecting the correct IP addresses when a configuration is evaluated at
runtime. See
the
[docs](https://godoc.org/github.com/hashicorp/go-sockaddr),
[`template` package](https://godoc.org/github.com/hashicorp/go-sockaddr/template),
tests,
and
[CLI utility](https://github.com/hashicorp/go-sockaddr/tree/master/cmd/sockaddr)
for details and hints as to how to use this library.
For example, with this library it is possible to find an IP address that:
* is attached to a default route
([`GetDefaultInterfaces()`](https://godoc.org/github.com/hashicorp/go-sockaddr#GetDefaultInterfaces))
* is contained within a CIDR block ([`IfByNetwork()`](https://godoc.org/github.com/hashicorp/go-sockaddr#IfByNetwork))
* is an RFC1918 address
([`IfByRFC("1918")`](https://godoc.org/github.com/hashicorp/go-sockaddr#IfByRFC))
* is ordered
([`OrderedIfAddrBy(args)`](https://godoc.org/github.com/hashicorp/go-sockaddr#OrderedIfAddrBy) where
`args` includes, but is not limited
to,
[`AscIfType`](https://godoc.org/github.com/hashicorp/go-sockaddr#AscIfType),
[`AscNetworkSize`](https://godoc.org/github.com/hashicorp/go-sockaddr#AscNetworkSize))
* excludes all IPv6 addresses
([`IfByType("^(IPv4)$")`](https://godoc.org/github.com/hashicorp/go-sockaddr#IfByType))
* is larger than a `/32`
([`IfByMaskSize(32)`](https://godoc.org/github.com/hashicorp/go-sockaddr#IfByMaskSize))
* is not on a `down` interface
([`ExcludeIfs("flags", "down")`](https://godoc.org/github.com/hashicorp/go-sockaddr#ExcludeIfs))
* preferences an IPv6 address over an IPv4 address
([`SortIfByType()`](https://godoc.org/github.com/hashicorp/go-sockaddr#SortIfByType) +
[`ReverseIfAddrs()`](https://godoc.org/github.com/hashicorp/go-sockaddr#ReverseIfAddrs)); and
* excludes any IP in RFC6890 address
([`IfByRFC("6890")`](https://godoc.org/github.com/hashicorp/go-sockaddr#IfByRFC))
Or any combination or variation therein.
There are also a few simple helper functions such as `GetPublicIP` and
`GetPrivateIP` which both return strings and select the first public or private
IP address on the default interface, respectively. Similarly, there is also a
helper function called `GetInterfaceIP` which returns the first usable IP
address on the named interface.
## `sockaddr` CLI
Given the possible complexity of the `sockaddr` library, there is a CLI utility
that accompanies the library, also
called
[`sockaddr`](https://github.com/hashicorp/go-sockaddr/tree/master/cmd/sockaddr).
The
[`sockaddr`](https://github.com/hashicorp/go-sockaddr/tree/master/cmd/sockaddr)
utility exposes nearly all of the functionality of the library and can be used
either as an administrative tool or testing tool. To install
the
[`sockaddr`](https://github.com/hashicorp/go-sockaddr/tree/master/cmd/sockaddr),
run:
```text
$ go get -u github.com/hashicorp/go-sockaddr/cmd/sockaddr
```
If you're familiar with UNIX's `sockaddr` struct's, the following diagram
mapping the C `sockaddr` (top) to `go-sockaddr` structs (bottom) and
interfaces will be helpful:
```
+-------------------------------------------------------+
| |
| sockaddr |
| SockAddr |
| |
| +--------------+ +----------------------------------+ |
| | sockaddr_un | | | |
| | SockAddrUnix | | sockaddr_in{,6} | |
| +--------------+ | IPAddr | |
| | | |
| | +-------------+ +--------------+ | |
| | | sockaddr_in | | sockaddr_in6 | | |
| | | IPv4Addr | | IPv6Addr | | |
| | +-------------+ +--------------+ | |
| | | |
| +----------------------------------+ |
| |
+-------------------------------------------------------+
```
## Inspiration and Design
There were many subtle inspirations that led to this design, but the most direct
inspiration for the filtering syntax was
OpenBSD's
[`pf.conf(5)`](https://www.freebsd.org/cgi/man.cgi?query=pf.conf&apropos=0&sektion=0&arch=default&format=html#PARAMETERS) firewall
syntax that lets you select the first IP address on a given named interface.
The original problem stemmed from:
* needing to create immutable images using [Packer](https://www.packer.io) that
ran the [Consul](https://www.consul.io) process (Consul can only use one IP
address at a time);
* images that may or may not have multiple interfaces or IP addresses at
runtime; and
* we didn't want to rely on configuration management to render out the correct
IP address if the VM image was being used in an auto-scaling group.
Instead we needed some way to codify a heuristic that would correctly select the
right IP address but the input parameters were not known when the image was
created.

5
vendor/github.com/hashicorp/go-sockaddr/doc.go generated vendored Normal file
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/*
Package sockaddr is a Go implementation of the UNIX socket family data types and
related helper functions.
*/
package sockaddr

8
vendor/github.com/hashicorp/go-sockaddr/go.mod generated vendored Normal file
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module github.com/hashicorp/go-sockaddr
require (
github.com/hashicorp/errwrap v1.0.0
github.com/mitchellh/cli v1.0.0
github.com/mitchellh/go-wordwrap v1.0.0
github.com/ryanuber/columnize v2.1.0+incompatible
)

24
vendor/github.com/hashicorp/go-sockaddr/go.sum generated vendored Normal file
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@ -0,0 +1,24 @@
github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310 h1:BUAU3CGlLvorLI26FmByPp2eC2qla6E1Tw+scpcg/to=
github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
github.com/bgentry/speakeasy v0.1.0 h1:ByYyxL9InA1OWqxJqqp2A5pYHUrCiAL6K3J+LKSsQkY=
github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
github.com/fatih/color v1.7.0 h1:DkWD4oS2D8LGGgTQ6IvwJJXSL5Vp2ffcQg58nFV38Ys=
github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
github.com/hashicorp/errwrap v1.0.0 h1:hLrqtEDnRye3+sgx6z4qVLNuviH3MR5aQ0ykNJa/UYA=
github.com/hashicorp/errwrap v1.0.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
github.com/hashicorp/go-multierror v1.0.0 h1:iVjPR7a6H0tWELX5NxNe7bYopibicUzc7uPribsnS6o=
github.com/hashicorp/go-multierror v1.0.0/go.mod h1:dHtQlpGsu+cZNNAkkCN/P3hoUDHhCYQXV3UM06sGGrk=
github.com/mattn/go-colorable v0.0.9 h1:UVL0vNpWh04HeJXV0KLcaT7r06gOH2l4OW6ddYRUIY4=
github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaOChaDxuIBZU=
github.com/mattn/go-isatty v0.0.3 h1:ns/ykhmWi7G9O+8a448SecJU3nSMBXJfqQkl0upE1jI=
github.com/mattn/go-isatty v0.0.3/go.mod h1:M+lRXTBqGeGNdLjl/ufCoiOlB5xdOkqRJdNxMWT7Zi4=
github.com/mitchellh/cli v1.0.0 h1:iGBIsUe3+HZ/AD/Vd7DErOt5sU9fa8Uj7A2s1aggv1Y=
github.com/mitchellh/cli v1.0.0/go.mod h1:hNIlj7HEI86fIcpObd7a0FcrxTWetlwJDGcceTlRvqc=
github.com/mitchellh/go-wordwrap v1.0.0 h1:6GlHJ/LTGMrIJbwgdqdl2eEH8o+Exx/0m8ir9Gns0u4=
github.com/mitchellh/go-wordwrap v1.0.0/go.mod h1:ZXFpozHsX6DPmq2I0TCekCxypsnAUbP2oI0UX1GXzOo=
github.com/posener/complete v1.1.1 h1:ccV59UEOTzVDnDUEFdT95ZzHVZ+5+158q8+SJb2QV5w=
github.com/posener/complete v1.1.1/go.mod h1:em0nMJCgc9GFtwrmVmEMR/ZL6WyhyjMBndrE9hABlRI=
github.com/ryanuber/columnize v2.1.0+incompatible h1:j1Wcmh8OrK4Q7GXY+V7SVSY8nUWQxHW5TkBe7YUl+2s=
github.com/ryanuber/columnize v2.1.0+incompatible/go.mod h1:sm1tb6uqfes/u+d4ooFouqFdy9/2g9QGwK3SQygK0Ts=
golang.org/x/sys v0.0.0-20180823144017-11551d06cbcc h1:MeuS1UDyZyFH++6vVy44PuufTeFF0d0nfI6XB87YGSk=
golang.org/x/sys v0.0.0-20180823144017-11551d06cbcc/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=

254
vendor/github.com/hashicorp/go-sockaddr/ifaddr.go generated vendored Normal file
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@ -0,0 +1,254 @@
package sockaddr
import "strings"
// ifAddrAttrMap is a map of the IfAddr type-specific attributes.
var ifAddrAttrMap map[AttrName]func(IfAddr) string
var ifAddrAttrs []AttrName
func init() {
ifAddrAttrInit()
}
// GetPrivateIP returns a string with a single IP address that is part of RFC
// 6890 and has a default route. If the system can't determine its IP address
// or find an RFC 6890 IP address, an empty string will be returned instead.
// This function is the `eval` equivalent of:
//
// ```
// $ sockaddr eval -r '{{GetPrivateInterfaces | attr "address"}}'
/// ```
func GetPrivateIP() (string, error) {
privateIfs, err := GetPrivateInterfaces()
if err != nil {
return "", err
}
if len(privateIfs) < 1 {
return "", nil
}
ifAddr := privateIfs[0]
ip := *ToIPAddr(ifAddr.SockAddr)
return ip.NetIP().String(), nil
}
// GetPrivateIPs returns a string with all IP addresses that are part of RFC
// 6890 (regardless of whether or not there is a default route, unlike
// GetPublicIP). If the system can't find any RFC 6890 IP addresses, an empty
// string will be returned instead. This function is the `eval` equivalent of:
//
// ```
// $ sockaddr eval -r '{{GetAllInterfaces | include "RFC" "6890" | join "address" " "}}'
/// ```
func GetPrivateIPs() (string, error) {
ifAddrs, err := GetAllInterfaces()
if err != nil {
return "", err
} else if len(ifAddrs) < 1 {
return "", nil
}
ifAddrs, _ = FilterIfByType(ifAddrs, TypeIP)
if len(ifAddrs) == 0 {
return "", nil
}
OrderedIfAddrBy(AscIfType, AscIfNetworkSize).Sort(ifAddrs)
ifAddrs, _, err = IfByRFC("6890", ifAddrs)
if err != nil {
return "", err
} else if len(ifAddrs) == 0 {
return "", nil
}
_, ifAddrs, err = IfByRFC(ForwardingBlacklistRFC, ifAddrs)
if err != nil {
return "", err
} else if len(ifAddrs) == 0 {
return "", nil
}
ips := make([]string, 0, len(ifAddrs))
for _, ifAddr := range ifAddrs {
ip := *ToIPAddr(ifAddr.SockAddr)
s := ip.NetIP().String()
ips = append(ips, s)
}
return strings.Join(ips, " "), nil
}
// GetPublicIP returns a string with a single IP address that is NOT part of RFC
// 6890 and has a default route. If the system can't determine its IP address
// or find a non RFC 6890 IP address, an empty string will be returned instead.
// This function is the `eval` equivalent of:
//
// ```
// $ sockaddr eval -r '{{GetPublicInterfaces | attr "address"}}'
/// ```
func GetPublicIP() (string, error) {
publicIfs, err := GetPublicInterfaces()
if err != nil {
return "", err
} else if len(publicIfs) < 1 {
return "", nil
}
ifAddr := publicIfs[0]
ip := *ToIPAddr(ifAddr.SockAddr)
return ip.NetIP().String(), nil
}
// GetPublicIPs returns a string with all IP addresses that are NOT part of RFC
// 6890 (regardless of whether or not there is a default route, unlike
// GetPublicIP). If the system can't find any non RFC 6890 IP addresses, an
// empty string will be returned instead. This function is the `eval`
// equivalent of:
//
// ```
// $ sockaddr eval -r '{{GetAllInterfaces | exclude "RFC" "6890" | join "address" " "}}'
/// ```
func GetPublicIPs() (string, error) {
ifAddrs, err := GetAllInterfaces()
if err != nil {
return "", err
} else if len(ifAddrs) < 1 {
return "", nil
}
ifAddrs, _ = FilterIfByType(ifAddrs, TypeIP)
if len(ifAddrs) == 0 {
return "", nil
}
OrderedIfAddrBy(AscIfType, AscIfNetworkSize).Sort(ifAddrs)
_, ifAddrs, err = IfByRFC("6890", ifAddrs)
if err != nil {
return "", err
} else if len(ifAddrs) == 0 {
return "", nil
}
ips := make([]string, 0, len(ifAddrs))
for _, ifAddr := range ifAddrs {
ip := *ToIPAddr(ifAddr.SockAddr)
s := ip.NetIP().String()
ips = append(ips, s)
}
return strings.Join(ips, " "), nil
}
// GetInterfaceIP returns a string with a single IP address sorted by the size
// of the network (i.e. IP addresses with a smaller netmask, larger network
// size, are sorted first). This function is the `eval` equivalent of:
//
// ```
// $ sockaddr eval -r '{{GetAllInterfaces | include "name" <<ARG>> | sort "type,size" | include "flag" "forwardable" | attr "address" }}'
/// ```
func GetInterfaceIP(namedIfRE string) (string, error) {
ifAddrs, err := GetAllInterfaces()
if err != nil {
return "", err
}
ifAddrs, _, err = IfByName(namedIfRE, ifAddrs)
if err != nil {
return "", err
}
ifAddrs, _, err = IfByFlag("forwardable", ifAddrs)
if err != nil {
return "", err
}
ifAddrs, err = SortIfBy("+type,+size", ifAddrs)
if err != nil {
return "", err
}
if len(ifAddrs) == 0 {
return "", err
}
ip := ToIPAddr(ifAddrs[0].SockAddr)
if ip == nil {
return "", err
}
return IPAddrAttr(*ip, "address"), nil
}
// GetInterfaceIPs returns a string with all IPs, sorted by the size of the
// network (i.e. IP addresses with a smaller netmask, larger network size, are
// sorted first), on a named interface. This function is the `eval` equivalent
// of:
//
// ```
// $ sockaddr eval -r '{{GetAllInterfaces | include "name" <<ARG>> | sort "type,size" | join "address" " "}}'
/// ```
func GetInterfaceIPs(namedIfRE string) (string, error) {
ifAddrs, err := GetAllInterfaces()
if err != nil {
return "", err
}
ifAddrs, _, err = IfByName(namedIfRE, ifAddrs)
if err != nil {
return "", err
}
ifAddrs, err = SortIfBy("+type,+size", ifAddrs)
if err != nil {
return "", err
}
if len(ifAddrs) == 0 {
return "", err
}
ips := make([]string, 0, len(ifAddrs))
for _, ifAddr := range ifAddrs {
ip := *ToIPAddr(ifAddr.SockAddr)
s := ip.NetIP().String()
ips = append(ips, s)
}
return strings.Join(ips, " "), nil
}
// IfAddrAttrs returns a list of attributes supported by the IfAddr type
func IfAddrAttrs() []AttrName {
return ifAddrAttrs
}
// IfAddrAttr returns a string representation of an attribute for the given
// IfAddr.
func IfAddrAttr(ifAddr IfAddr, attrName AttrName) string {
fn, found := ifAddrAttrMap[attrName]
if !found {
return ""
}
return fn(ifAddr)
}
// ifAddrAttrInit is called once at init()
func ifAddrAttrInit() {
// Sorted for human readability
ifAddrAttrs = []AttrName{
"flags",
"name",
}
ifAddrAttrMap = map[AttrName]func(ifAddr IfAddr) string{
"flags": func(ifAddr IfAddr) string {
return ifAddr.Interface.Flags.String()
},
"name": func(ifAddr IfAddr) string {
return ifAddr.Interface.Name
},
}
}

1304
vendor/github.com/hashicorp/go-sockaddr/ifaddrs.go generated vendored Normal file
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65
vendor/github.com/hashicorp/go-sockaddr/ifattr.go generated vendored Normal file
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package sockaddr
import (
"fmt"
"net"
)
// IfAddr is a union of a SockAddr and a net.Interface.
type IfAddr struct {
SockAddr
net.Interface
}
// Attr returns the named attribute as a string
func (ifAddr IfAddr) Attr(attrName AttrName) (string, error) {
val := IfAddrAttr(ifAddr, attrName)
if val != "" {
return val, nil
}
return Attr(ifAddr.SockAddr, attrName)
}
// Attr returns the named attribute as a string
func Attr(sa SockAddr, attrName AttrName) (string, error) {
switch sockType := sa.Type(); {
case sockType&TypeIP != 0:
ip := *ToIPAddr(sa)
attrVal := IPAddrAttr(ip, attrName)
if attrVal != "" {
return attrVal, nil
}
if sockType == TypeIPv4 {
ipv4 := *ToIPv4Addr(sa)
attrVal := IPv4AddrAttr(ipv4, attrName)
if attrVal != "" {
return attrVal, nil
}
} else if sockType == TypeIPv6 {
ipv6 := *ToIPv6Addr(sa)
attrVal := IPv6AddrAttr(ipv6, attrName)
if attrVal != "" {
return attrVal, nil
}
}
case sockType == TypeUnix:
us := *ToUnixSock(sa)
attrVal := UnixSockAttr(us, attrName)
if attrVal != "" {
return attrVal, nil
}
}
// Non type-specific attributes
switch attrName {
case "string":
return sa.String(), nil
case "type":
return sa.Type().String(), nil
}
return "", fmt.Errorf("unsupported attribute name %q", attrName)
}

169
vendor/github.com/hashicorp/go-sockaddr/ipaddr.go generated vendored Normal file
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package sockaddr
import (
"fmt"
"math/big"
"net"
"strings"
)
// Constants for the sizes of IPv3, IPv4, and IPv6 address types.
const (
IPv3len = 6
IPv4len = 4
IPv6len = 16
)
// IPAddr is a generic IP address interface for IPv4 and IPv6 addresses,
// networks, and socket endpoints.
type IPAddr interface {
SockAddr
AddressBinString() string
AddressHexString() string
Cmp(SockAddr) int
CmpAddress(SockAddr) int
CmpPort(SockAddr) int
FirstUsable() IPAddr
Host() IPAddr
IPPort() IPPort
LastUsable() IPAddr
Maskbits() int
NetIP() *net.IP
NetIPMask() *net.IPMask
NetIPNet() *net.IPNet
Network() IPAddr
Octets() []int
}
// IPPort is the type for an IP port number for the TCP and UDP IP transports.
type IPPort uint16
// IPPrefixLen is a typed integer representing the prefix length for a given
// IPAddr.
type IPPrefixLen byte
// ipAddrAttrMap is a map of the IPAddr type-specific attributes.
var ipAddrAttrMap map[AttrName]func(IPAddr) string
var ipAddrAttrs []AttrName
func init() {
ipAddrInit()
}
// NewIPAddr creates a new IPAddr from a string. Returns nil if the string is
// not an IPv4 or an IPv6 address.
func NewIPAddr(addr string) (IPAddr, error) {
ipv4Addr, err := NewIPv4Addr(addr)
if err == nil {
return ipv4Addr, nil
}
ipv6Addr, err := NewIPv6Addr(addr)
if err == nil {
return ipv6Addr, nil
}
return nil, fmt.Errorf("invalid IPAddr %v", addr)
}
// IPAddrAttr returns a string representation of an attribute for the given
// IPAddr.
func IPAddrAttr(ip IPAddr, selector AttrName) string {
fn, found := ipAddrAttrMap[selector]
if !found {
return ""
}
return fn(ip)
}
// IPAttrs returns a list of attributes supported by the IPAddr type
func IPAttrs() []AttrName {
return ipAddrAttrs
}
// MustIPAddr is a helper method that must return an IPAddr or panic on invalid
// input.
func MustIPAddr(addr string) IPAddr {
ip, err := NewIPAddr(addr)
if err != nil {
panic(fmt.Sprintf("Unable to create an IPAddr from %+q: %v", addr, err))
}
return ip
}
// ipAddrInit is called once at init()
func ipAddrInit() {
// Sorted for human readability
ipAddrAttrs = []AttrName{
"host",
"address",
"port",
"netmask",
"network",
"mask_bits",
"binary",
"hex",
"first_usable",
"last_usable",
"octets",
}
ipAddrAttrMap = map[AttrName]func(ip IPAddr) string{
"address": func(ip IPAddr) string {
return ip.NetIP().String()
},
"binary": func(ip IPAddr) string {
return ip.AddressBinString()
},
"first_usable": func(ip IPAddr) string {
return ip.FirstUsable().String()
},
"hex": func(ip IPAddr) string {
return ip.AddressHexString()
},
"host": func(ip IPAddr) string {
return ip.Host().String()
},
"last_usable": func(ip IPAddr) string {
return ip.LastUsable().String()
},
"mask_bits": func(ip IPAddr) string {
return fmt.Sprintf("%d", ip.Maskbits())
},
"netmask": func(ip IPAddr) string {
switch v := ip.(type) {
case IPv4Addr:
ipv4Mask := IPv4Addr{
Address: IPv4Address(v.Mask),
Mask: IPv4HostMask,
}
return ipv4Mask.String()
case IPv6Addr:
ipv6Mask := new(big.Int)
ipv6Mask.Set(v.Mask)
ipv6MaskAddr := IPv6Addr{
Address: IPv6Address(ipv6Mask),
Mask: ipv6HostMask,
}
return ipv6MaskAddr.String()
default:
return fmt.Sprintf("<unsupported type: %T>", ip)
}
},
"network": func(ip IPAddr) string {
return ip.Network().NetIP().String()
},
"octets": func(ip IPAddr) string {
octets := ip.Octets()
octetStrs := make([]string, 0, len(octets))
for _, octet := range octets {
octetStrs = append(octetStrs, fmt.Sprintf("%d", octet))
}
return strings.Join(octetStrs, " ")
},
"port": func(ip IPAddr) string {
return fmt.Sprintf("%d", ip.IPPort())
},
}
}

98
vendor/github.com/hashicorp/go-sockaddr/ipaddrs.go generated vendored Normal file
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package sockaddr
import "bytes"
type IPAddrs []IPAddr
func (s IPAddrs) Len() int { return len(s) }
func (s IPAddrs) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
// // SortIPAddrsByCmp is a type that satisfies sort.Interface and can be used
// // by the routines in this package. The SortIPAddrsByCmp type is used to
// // sort IPAddrs by Cmp()
// type SortIPAddrsByCmp struct{ IPAddrs }
// // Less reports whether the element with index i should sort before the
// // element with index j.
// func (s SortIPAddrsByCmp) Less(i, j int) bool {
// // Sort by Type, then address, then port number.
// return Less(s.IPAddrs[i], s.IPAddrs[j])
// }
// SortIPAddrsBySpecificMaskLen is a type that satisfies sort.Interface and
// can be used by the routines in this package. The
// SortIPAddrsBySpecificMaskLen type is used to sort IPAddrs by smallest
// network (most specific to largest network).
type SortIPAddrsByNetworkSize struct{ IPAddrs }
// Less reports whether the element with index i should sort before the
// element with index j.
func (s SortIPAddrsByNetworkSize) Less(i, j int) bool {
// Sort masks with a larger binary value (i.e. fewer hosts per network
// prefix) after masks with a smaller value (larger number of hosts per
// prefix).
switch bytes.Compare([]byte(*s.IPAddrs[i].NetIPMask()), []byte(*s.IPAddrs[j].NetIPMask())) {
case 0:
// Fall through to the second test if the net.IPMasks are the
// same.
break
case 1:
return true
case -1:
return false
default:
panic("bad, m'kay?")
}
// Sort IPs based on the length (i.e. prefer IPv4 over IPv6).
iLen := len(*s.IPAddrs[i].NetIP())
jLen := len(*s.IPAddrs[j].NetIP())
if iLen != jLen {
return iLen > jLen
}
// Sort IPs based on their network address from lowest to highest.
switch bytes.Compare(s.IPAddrs[i].NetIPNet().IP, s.IPAddrs[j].NetIPNet().IP) {
case 0:
break
case 1:
return false
case -1:
return true
default:
panic("lol wut?")
}
// If a host does not have a port set, it always sorts after hosts
// that have a port (e.g. a host with a /32 and port number is more
// specific and should sort first over a host with a /32 but no port
// set).
if s.IPAddrs[i].IPPort() == 0 || s.IPAddrs[j].IPPort() == 0 {
return false
}
return s.IPAddrs[i].IPPort() < s.IPAddrs[j].IPPort()
}
// SortIPAddrsBySpecificMaskLen is a type that satisfies sort.Interface and
// can be used by the routines in this package. The
// SortIPAddrsBySpecificMaskLen type is used to sort IPAddrs by smallest
// network (most specific to largest network).
type SortIPAddrsBySpecificMaskLen struct{ IPAddrs }
// Less reports whether the element with index i should sort before the
// element with index j.
func (s SortIPAddrsBySpecificMaskLen) Less(i, j int) bool {
return s.IPAddrs[i].Maskbits() > s.IPAddrs[j].Maskbits()
}
// SortIPAddrsByBroadMaskLen is a type that satisfies sort.Interface and can
// be used by the routines in this package. The SortIPAddrsByBroadMaskLen
// type is used to sort IPAddrs by largest network (i.e. largest subnets
// first).
type SortIPAddrsByBroadMaskLen struct{ IPAddrs }
// Less reports whether the element with index i should sort before the
// element with index j.
func (s SortIPAddrsByBroadMaskLen) Less(i, j int) bool {
return s.IPAddrs[i].Maskbits() < s.IPAddrs[j].Maskbits()
}

516
vendor/github.com/hashicorp/go-sockaddr/ipv4addr.go generated vendored Normal file
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@ -0,0 +1,516 @@
package sockaddr
import (
"encoding/binary"
"fmt"
"net"
"regexp"
"strconv"
"strings"
)
type (
// IPv4Address is a named type representing an IPv4 address.
IPv4Address uint32
// IPv4Network is a named type representing an IPv4 network.
IPv4Network uint32
// IPv4Mask is a named type representing an IPv4 network mask.
IPv4Mask uint32
)
// IPv4HostMask is a constant represents a /32 IPv4 Address
// (i.e. 255.255.255.255).
const IPv4HostMask = IPv4Mask(0xffffffff)
// ipv4AddrAttrMap is a map of the IPv4Addr type-specific attributes.
var ipv4AddrAttrMap map[AttrName]func(IPv4Addr) string
var ipv4AddrAttrs []AttrName
var trailingHexNetmaskRE *regexp.Regexp
// IPv4Addr implements a convenience wrapper around the union of Go's
// built-in net.IP and net.IPNet types. In UNIX-speak, IPv4Addr implements
// `sockaddr` when the the address family is set to AF_INET
// (i.e. `sockaddr_in`).
type IPv4Addr struct {
IPAddr
Address IPv4Address
Mask IPv4Mask
Port IPPort
}
func init() {
ipv4AddrInit()
trailingHexNetmaskRE = regexp.MustCompile(`/([0f]{8})$`)
}
// NewIPv4Addr creates an IPv4Addr from a string. String can be in the form
// of either an IPv4:port (e.g. `1.2.3.4:80`, in which case the mask is
// assumed to be a `/32`), an IPv4 address (e.g. `1.2.3.4`, also with a `/32`
// mask), or an IPv4 CIDR (e.g. `1.2.3.4/24`, which has its IP port
// initialized to zero). ipv4Str can not be a hostname.
//
// NOTE: Many net.*() routines will initialize and return an IPv6 address.
// To create uint32 values from net.IP, always test to make sure the address
// returned can be converted to a 4 byte array using To4().
func NewIPv4Addr(ipv4Str string) (IPv4Addr, error) {
// Strip off any bogus hex-encoded netmasks that will be mis-parsed by Go. In
// particular, clients with the Barracuda VPN client will see something like:
// `192.168.3.51/00ffffff` as their IP address.
trailingHexNetmaskRe := trailingHexNetmaskRE.Copy()
if match := trailingHexNetmaskRe.FindStringIndex(ipv4Str); match != nil {
ipv4Str = ipv4Str[:match[0]]
}
// Parse as an IPv4 CIDR
ipAddr, network, err := net.ParseCIDR(ipv4Str)
if err == nil {
ipv4 := ipAddr.To4()
if ipv4 == nil {
return IPv4Addr{}, fmt.Errorf("Unable to convert %s to an IPv4 address", ipv4Str)
}
// If we see an IPv6 netmask, convert it to an IPv4 mask.
netmaskSepPos := strings.LastIndexByte(ipv4Str, '/')
if netmaskSepPos != -1 && netmaskSepPos+1 < len(ipv4Str) {
netMask, err := strconv.ParseUint(ipv4Str[netmaskSepPos+1:], 10, 8)
if err != nil {
return IPv4Addr{}, fmt.Errorf("Unable to convert %s to an IPv4 address: unable to parse CIDR netmask: %v", ipv4Str, err)
} else if netMask > 128 {
return IPv4Addr{}, fmt.Errorf("Unable to convert %s to an IPv4 address: invalid CIDR netmask", ipv4Str)
}
if netMask >= 96 {
// Convert the IPv6 netmask to an IPv4 netmask
network.Mask = net.CIDRMask(int(netMask-96), IPv4len*8)
}
}
ipv4Addr := IPv4Addr{
Address: IPv4Address(binary.BigEndian.Uint32(ipv4)),
Mask: IPv4Mask(binary.BigEndian.Uint32(network.Mask)),
}
return ipv4Addr, nil
}
// Attempt to parse ipv4Str as a /32 host with a port number.
tcpAddr, err := net.ResolveTCPAddr("tcp4", ipv4Str)
if err == nil {
ipv4 := tcpAddr.IP.To4()
if ipv4 == nil {
return IPv4Addr{}, fmt.Errorf("Unable to resolve %+q as an IPv4 address", ipv4Str)
}
ipv4Uint32 := binary.BigEndian.Uint32(ipv4)
ipv4Addr := IPv4Addr{
Address: IPv4Address(ipv4Uint32),
Mask: IPv4HostMask,
Port: IPPort(tcpAddr.Port),
}
return ipv4Addr, nil
}
// Parse as a naked IPv4 address
ip := net.ParseIP(ipv4Str)
if ip != nil {
ipv4 := ip.To4()
if ipv4 == nil {
return IPv4Addr{}, fmt.Errorf("Unable to string convert %+q to an IPv4 address", ipv4Str)
}
ipv4Uint32 := binary.BigEndian.Uint32(ipv4)
ipv4Addr := IPv4Addr{
Address: IPv4Address(ipv4Uint32),
Mask: IPv4HostMask,
}
return ipv4Addr, nil
}
return IPv4Addr{}, fmt.Errorf("Unable to parse %+q to an IPv4 address: %v", ipv4Str, err)
}
// AddressBinString returns a string with the IPv4Addr's Address represented
// as a sequence of '0' and '1' characters. This method is useful for
// debugging or by operators who want to inspect an address.
func (ipv4 IPv4Addr) AddressBinString() string {
return fmt.Sprintf("%032s", strconv.FormatUint(uint64(ipv4.Address), 2))
}
// AddressHexString returns a string with the IPv4Addr address represented as
// a sequence of hex characters. This method is useful for debugging or by
// operators who want to inspect an address.
func (ipv4 IPv4Addr) AddressHexString() string {
return fmt.Sprintf("%08s", strconv.FormatUint(uint64(ipv4.Address), 16))
}
// Broadcast is an IPv4Addr-only method that returns the broadcast address of
// the network.
//
// NOTE: IPv6 only supports multicast, so this method only exists for
// IPv4Addr.
func (ipv4 IPv4Addr) Broadcast() IPAddr {
// Nothing should listen on a broadcast address.
return IPv4Addr{
Address: IPv4Address(ipv4.BroadcastAddress()),
Mask: IPv4HostMask,
}
}
// BroadcastAddress returns a IPv4Network of the IPv4Addr's broadcast
// address.
func (ipv4 IPv4Addr) BroadcastAddress() IPv4Network {
return IPv4Network(uint32(ipv4.Address)&uint32(ipv4.Mask) | ^uint32(ipv4.Mask))
}
// CmpAddress follows the Cmp() standard protocol and returns:
//
// - -1 If the receiver should sort first because its address is lower than arg
// - 0 if the SockAddr arg is equal to the receiving IPv4Addr or the argument is
// of a different type.
// - 1 If the argument should sort first.
func (ipv4 IPv4Addr) CmpAddress(sa SockAddr) int {
ipv4b, ok := sa.(IPv4Addr)
if !ok {
return sortDeferDecision
}
switch {
case ipv4.Address == ipv4b.Address:
return sortDeferDecision
case ipv4.Address < ipv4b.Address:
return sortReceiverBeforeArg
default:
return sortArgBeforeReceiver
}
}
// CmpPort follows the Cmp() standard protocol and returns:
//
// - -1 If the receiver should sort first because its port is lower than arg
// - 0 if the SockAddr arg's port number is equal to the receiving IPv4Addr,
// regardless of type.
// - 1 If the argument should sort first.
func (ipv4 IPv4Addr) CmpPort(sa SockAddr) int {
var saPort IPPort
switch v := sa.(type) {
case IPv4Addr:
saPort = v.Port
case IPv6Addr:
saPort = v.Port
default:
return sortDeferDecision
}
switch {
case ipv4.Port == saPort:
return sortDeferDecision
case ipv4.Port < saPort:
return sortReceiverBeforeArg
default:
return sortArgBeforeReceiver
}
}
// CmpRFC follows the Cmp() standard protocol and returns:
//
// - -1 If the receiver should sort first because it belongs to the RFC and its
// arg does not
// - 0 if the receiver and arg both belong to the same RFC or neither do.
// - 1 If the arg belongs to the RFC but receiver does not.
func (ipv4 IPv4Addr) CmpRFC(rfcNum uint, sa SockAddr) int {
recvInRFC := IsRFC(rfcNum, ipv4)
ipv4b, ok := sa.(IPv4Addr)
if !ok {
// If the receiver is part of the desired RFC and the SockAddr
// argument is not, return -1 so that the receiver sorts before
// the non-IPv4 SockAddr. Conversely, if the receiver is not
// part of the RFC, punt on sorting and leave it for the next
// sorter.
if recvInRFC {
return sortReceiverBeforeArg
} else {
return sortDeferDecision
}
}
argInRFC := IsRFC(rfcNum, ipv4b)
switch {
case (recvInRFC && argInRFC), (!recvInRFC && !argInRFC):
// If a and b both belong to the RFC, or neither belong to
// rfcNum, defer sorting to the next sorter.
return sortDeferDecision
case recvInRFC && !argInRFC:
return sortReceiverBeforeArg
default:
return sortArgBeforeReceiver
}
}
// Contains returns true if the SockAddr is contained within the receiver.
func (ipv4 IPv4Addr) Contains(sa SockAddr) bool {
ipv4b, ok := sa.(IPv4Addr)
if !ok {
return false
}
return ipv4.ContainsNetwork(ipv4b)
}
// ContainsAddress returns true if the IPv4Address is contained within the
// receiver.
func (ipv4 IPv4Addr) ContainsAddress(x IPv4Address) bool {
return IPv4Address(ipv4.NetworkAddress()) <= x &&
IPv4Address(ipv4.BroadcastAddress()) >= x
}
// ContainsNetwork returns true if the network from IPv4Addr is contained
// within the receiver.
func (ipv4 IPv4Addr) ContainsNetwork(x IPv4Addr) bool {
return ipv4.NetworkAddress() <= x.NetworkAddress() &&
ipv4.BroadcastAddress() >= x.BroadcastAddress()
}
// DialPacketArgs returns the arguments required to be passed to
// net.DialUDP(). If the Mask of ipv4 is not a /32 or the Port is 0,
// DialPacketArgs() will fail. See Host() to create an IPv4Addr with its
// mask set to /32.
func (ipv4 IPv4Addr) DialPacketArgs() (network, dialArgs string) {
if ipv4.Mask != IPv4HostMask || ipv4.Port == 0 {
return "udp4", ""
}
return "udp4", fmt.Sprintf("%s:%d", ipv4.NetIP().String(), ipv4.Port)
}
// DialStreamArgs returns the arguments required to be passed to
// net.DialTCP(). If the Mask of ipv4 is not a /32 or the Port is 0,
// DialStreamArgs() will fail. See Host() to create an IPv4Addr with its
// mask set to /32.
func (ipv4 IPv4Addr) DialStreamArgs() (network, dialArgs string) {
if ipv4.Mask != IPv4HostMask || ipv4.Port == 0 {
return "tcp4", ""
}
return "tcp4", fmt.Sprintf("%s:%d", ipv4.NetIP().String(), ipv4.Port)
}
// Equal returns true if a SockAddr is equal to the receiving IPv4Addr.
func (ipv4 IPv4Addr) Equal(sa SockAddr) bool {
ipv4b, ok := sa.(IPv4Addr)
if !ok {
return false
}
if ipv4.Port != ipv4b.Port {
return false
}
if ipv4.Address != ipv4b.Address {
return false
}
if ipv4.NetIPNet().String() != ipv4b.NetIPNet().String() {
return false
}
return true
}
// FirstUsable returns an IPv4Addr set to the first address following the
// network prefix. The first usable address in a network is normally the
// gateway and should not be used except by devices forwarding packets
// between two administratively distinct networks (i.e. a router). This
// function does not discriminate against first usable vs "first address that
// should be used." For example, FirstUsable() on "192.168.1.10/24" would
// return the address "192.168.1.1/24".
func (ipv4 IPv4Addr) FirstUsable() IPAddr {
addr := ipv4.NetworkAddress()
// If /32, return the address itself. If /31 assume a point-to-point
// link and return the lower address.
if ipv4.Maskbits() < 31 {
addr++
}
return IPv4Addr{
Address: IPv4Address(addr),
Mask: IPv4HostMask,
}
}
// Host returns a copy of ipv4 with its mask set to /32 so that it can be
// used by DialPacketArgs(), DialStreamArgs(), ListenPacketArgs(), or
// ListenStreamArgs().
func (ipv4 IPv4Addr) Host() IPAddr {
// Nothing should listen on a broadcast address.
return IPv4Addr{
Address: ipv4.Address,
Mask: IPv4HostMask,
Port: ipv4.Port,
}
}
// IPPort returns the Port number attached to the IPv4Addr
func (ipv4 IPv4Addr) IPPort() IPPort {
return ipv4.Port
}
// LastUsable returns the last address before the broadcast address in a
// given network.
func (ipv4 IPv4Addr) LastUsable() IPAddr {
addr := ipv4.BroadcastAddress()
// If /32, return the address itself. If /31 assume a point-to-point
// link and return the upper address.
if ipv4.Maskbits() < 31 {
addr--
}
return IPv4Addr{
Address: IPv4Address(addr),
Mask: IPv4HostMask,
}
}
// ListenPacketArgs returns the arguments required to be passed to
// net.ListenUDP(). If the Mask of ipv4 is not a /32, ListenPacketArgs()
// will fail. See Host() to create an IPv4Addr with its mask set to /32.
func (ipv4 IPv4Addr) ListenPacketArgs() (network, listenArgs string) {
if ipv4.Mask != IPv4HostMask {
return "udp4", ""
}
return "udp4", fmt.Sprintf("%s:%d", ipv4.NetIP().String(), ipv4.Port)
}
// ListenStreamArgs returns the arguments required to be passed to
// net.ListenTCP(). If the Mask of ipv4 is not a /32, ListenStreamArgs()
// will fail. See Host() to create an IPv4Addr with its mask set to /32.
func (ipv4 IPv4Addr) ListenStreamArgs() (network, listenArgs string) {
if ipv4.Mask != IPv4HostMask {
return "tcp4", ""
}
return "tcp4", fmt.Sprintf("%s:%d", ipv4.NetIP().String(), ipv4.Port)
}
// Maskbits returns the number of network mask bits in a given IPv4Addr. For
// example, the Maskbits() of "192.168.1.1/24" would return 24.
func (ipv4 IPv4Addr) Maskbits() int {
mask := make(net.IPMask, IPv4len)
binary.BigEndian.PutUint32(mask, uint32(ipv4.Mask))
maskOnes, _ := mask.Size()
return maskOnes
}
// MustIPv4Addr is a helper method that must return an IPv4Addr or panic on
// invalid input.
func MustIPv4Addr(addr string) IPv4Addr {
ipv4, err := NewIPv4Addr(addr)
if err != nil {
panic(fmt.Sprintf("Unable to create an IPv4Addr from %+q: %v", addr, err))
}
return ipv4
}
// NetIP returns the address as a net.IP (address is always presized to
// IPv4).
func (ipv4 IPv4Addr) NetIP() *net.IP {
x := make(net.IP, IPv4len)
binary.BigEndian.PutUint32(x, uint32(ipv4.Address))
return &x
}
// NetIPMask create a new net.IPMask from the IPv4Addr.
func (ipv4 IPv4Addr) NetIPMask() *net.IPMask {
ipv4Mask := net.IPMask{}
ipv4Mask = make(net.IPMask, IPv4len)
binary.BigEndian.PutUint32(ipv4Mask, uint32(ipv4.Mask))
return &ipv4Mask
}
// NetIPNet create a new net.IPNet from the IPv4Addr.
func (ipv4 IPv4Addr) NetIPNet() *net.IPNet {
ipv4net := &net.IPNet{}
ipv4net.IP = make(net.IP, IPv4len)
binary.BigEndian.PutUint32(ipv4net.IP, uint32(ipv4.NetworkAddress()))
ipv4net.Mask = *ipv4.NetIPMask()
return ipv4net
}
// Network returns the network prefix or network address for a given network.
func (ipv4 IPv4Addr) Network() IPAddr {
return IPv4Addr{
Address: IPv4Address(ipv4.NetworkAddress()),
Mask: ipv4.Mask,
}
}
// NetworkAddress returns an IPv4Network of the IPv4Addr's network address.
func (ipv4 IPv4Addr) NetworkAddress() IPv4Network {
return IPv4Network(uint32(ipv4.Address) & uint32(ipv4.Mask))
}
// Octets returns a slice of the four octets in an IPv4Addr's Address. The
// order of the bytes is big endian.
func (ipv4 IPv4Addr) Octets() []int {
return []int{
int(ipv4.Address >> 24),
int((ipv4.Address >> 16) & 0xff),
int((ipv4.Address >> 8) & 0xff),
int(ipv4.Address & 0xff),
}
}
// String returns a string representation of the IPv4Addr
func (ipv4 IPv4Addr) String() string {
if ipv4.Port != 0 {
return fmt.Sprintf("%s:%d", ipv4.NetIP().String(), ipv4.Port)
}
if ipv4.Maskbits() == 32 {
return ipv4.NetIP().String()
}
return fmt.Sprintf("%s/%d", ipv4.NetIP().String(), ipv4.Maskbits())
}
// Type is used as a type switch and returns TypeIPv4
func (IPv4Addr) Type() SockAddrType {
return TypeIPv4
}
// IPv4AddrAttr returns a string representation of an attribute for the given
// IPv4Addr.
func IPv4AddrAttr(ipv4 IPv4Addr, selector AttrName) string {
fn, found := ipv4AddrAttrMap[selector]
if !found {
return ""
}
return fn(ipv4)
}
// IPv4Attrs returns a list of attributes supported by the IPv4Addr type
func IPv4Attrs() []AttrName {
return ipv4AddrAttrs
}
// ipv4AddrInit is called once at init()
func ipv4AddrInit() {
// Sorted for human readability
ipv4AddrAttrs = []AttrName{
"size", // Same position as in IPv6 for output consistency
"broadcast",
"uint32",
}
ipv4AddrAttrMap = map[AttrName]func(ipv4 IPv4Addr) string{
"broadcast": func(ipv4 IPv4Addr) string {
return ipv4.Broadcast().String()
},
"size": func(ipv4 IPv4Addr) string {
return fmt.Sprintf("%d", 1<<uint(IPv4len*8-ipv4.Maskbits()))
},
"uint32": func(ipv4 IPv4Addr) string {
return fmt.Sprintf("%d", uint32(ipv4.Address))
},
}
}

591
vendor/github.com/hashicorp/go-sockaddr/ipv6addr.go generated vendored Normal file
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@ -0,0 +1,591 @@
package sockaddr
import (
"bytes"
"encoding/binary"
"fmt"
"math/big"
"net"
)
type (
// IPv6Address is a named type representing an IPv6 address.
IPv6Address *big.Int
// IPv6Network is a named type representing an IPv6 network.
IPv6Network *big.Int
// IPv6Mask is a named type representing an IPv6 network mask.
IPv6Mask *big.Int
)
// IPv6HostPrefix is a constant represents a /128 IPv6 Prefix.
const IPv6HostPrefix = IPPrefixLen(128)
// ipv6HostMask is an unexported big.Int representing a /128 IPv6 address.
// This value must be a constant and always set to all ones.
var ipv6HostMask IPv6Mask
// ipv6AddrAttrMap is a map of the IPv6Addr type-specific attributes.
var ipv6AddrAttrMap map[AttrName]func(IPv6Addr) string
var ipv6AddrAttrs []AttrName
func init() {
biMask := new(big.Int)
biMask.SetBytes([]byte{
0xff, 0xff,
0xff, 0xff,
0xff, 0xff,
0xff, 0xff,
0xff, 0xff,
0xff, 0xff,
0xff, 0xff,
0xff, 0xff,
},
)
ipv6HostMask = IPv6Mask(biMask)
ipv6AddrInit()
}
// IPv6Addr implements a convenience wrapper around the union of Go's
// built-in net.IP and net.IPNet types. In UNIX-speak, IPv6Addr implements
// `sockaddr` when the the address family is set to AF_INET6
// (i.e. `sockaddr_in6`).
type IPv6Addr struct {
IPAddr
Address IPv6Address
Mask IPv6Mask
Port IPPort
}
// NewIPv6Addr creates an IPv6Addr from a string. String can be in the form of
// an an IPv6:port (e.g. `[2001:4860:0:2001::68]:80`, in which case the mask is
// assumed to be a /128), an IPv6 address (e.g. `2001:4860:0:2001::68`, also
// with a `/128` mask), an IPv6 CIDR (e.g. `2001:4860:0:2001::68/64`, which has
// its IP port initialized to zero). ipv6Str can not be a hostname.
//
// NOTE: Many net.*() routines will initialize and return an IPv4 address.
// Always test to make sure the address returned cannot be converted to a 4 byte
// array using To4().
func NewIPv6Addr(ipv6Str string) (IPv6Addr, error) {
v6Addr := false
LOOP:
for i := 0; i < len(ipv6Str); i++ {
switch ipv6Str[i] {
case '.':
break LOOP
case ':':
v6Addr = true
break LOOP
}
}
if !v6Addr {
return IPv6Addr{}, fmt.Errorf("Unable to resolve %+q as an IPv6 address, appears to be an IPv4 address", ipv6Str)
}
// Attempt to parse ipv6Str as a /128 host with a port number.
tcpAddr, err := net.ResolveTCPAddr("tcp6", ipv6Str)
if err == nil {
ipv6 := tcpAddr.IP.To16()
if ipv6 == nil {
return IPv6Addr{}, fmt.Errorf("Unable to resolve %+q as a 16byte IPv6 address", ipv6Str)
}
ipv6BigIntAddr := new(big.Int)
ipv6BigIntAddr.SetBytes(ipv6)
ipv6BigIntMask := new(big.Int)
ipv6BigIntMask.Set(ipv6HostMask)
ipv6Addr := IPv6Addr{
Address: IPv6Address(ipv6BigIntAddr),
Mask: IPv6Mask(ipv6BigIntMask),
Port: IPPort(tcpAddr.Port),
}
return ipv6Addr, nil
}
// Parse as a naked IPv6 address. Trim square brackets if present.
if len(ipv6Str) > 2 && ipv6Str[0] == '[' && ipv6Str[len(ipv6Str)-1] == ']' {
ipv6Str = ipv6Str[1 : len(ipv6Str)-1]
}
ip := net.ParseIP(ipv6Str)
if ip != nil {
ipv6 := ip.To16()
if ipv6 == nil {
return IPv6Addr{}, fmt.Errorf("Unable to string convert %+q to a 16byte IPv6 address", ipv6Str)
}
ipv6BigIntAddr := new(big.Int)
ipv6BigIntAddr.SetBytes(ipv6)
ipv6BigIntMask := new(big.Int)
ipv6BigIntMask.Set(ipv6HostMask)
return IPv6Addr{
Address: IPv6Address(ipv6BigIntAddr),
Mask: IPv6Mask(ipv6BigIntMask),
}, nil
}
// Parse as an IPv6 CIDR
ipAddr, network, err := net.ParseCIDR(ipv6Str)
if err == nil {
ipv6 := ipAddr.To16()
if ipv6 == nil {
return IPv6Addr{}, fmt.Errorf("Unable to convert %+q to a 16byte IPv6 address", ipv6Str)
}
ipv6BigIntAddr := new(big.Int)
ipv6BigIntAddr.SetBytes(ipv6)
ipv6BigIntMask := new(big.Int)
ipv6BigIntMask.SetBytes(network.Mask)
ipv6Addr := IPv6Addr{
Address: IPv6Address(ipv6BigIntAddr),
Mask: IPv6Mask(ipv6BigIntMask),
}
return ipv6Addr, nil
}
return IPv6Addr{}, fmt.Errorf("Unable to parse %+q to an IPv6 address: %v", ipv6Str, err)
}
// AddressBinString returns a string with the IPv6Addr's Address represented
// as a sequence of '0' and '1' characters. This method is useful for
// debugging or by operators who want to inspect an address.
func (ipv6 IPv6Addr) AddressBinString() string {
bi := big.Int(*ipv6.Address)
return fmt.Sprintf("%0128s", bi.Text(2))
}
// AddressHexString returns a string with the IPv6Addr address represented as
// a sequence of hex characters. This method is useful for debugging or by
// operators who want to inspect an address.
func (ipv6 IPv6Addr) AddressHexString() string {
bi := big.Int(*ipv6.Address)
return fmt.Sprintf("%032s", bi.Text(16))
}
// CmpAddress follows the Cmp() standard protocol and returns:
//
// - -1 If the receiver should sort first because its address is lower than arg
// - 0 if the SockAddr arg equal to the receiving IPv6Addr or the argument is of a
// different type.
// - 1 If the argument should sort first.
func (ipv6 IPv6Addr) CmpAddress(sa SockAddr) int {
ipv6b, ok := sa.(IPv6Addr)
if !ok {
return sortDeferDecision
}
ipv6aBigInt := new(big.Int)
ipv6aBigInt.Set(ipv6.Address)
ipv6bBigInt := new(big.Int)
ipv6bBigInt.Set(ipv6b.Address)
return ipv6aBigInt.Cmp(ipv6bBigInt)
}
// CmpPort follows the Cmp() standard protocol and returns:
//
// - -1 If the receiver should sort first because its port is lower than arg
// - 0 if the SockAddr arg's port number is equal to the receiving IPv6Addr,
// regardless of type.
// - 1 If the argument should sort first.
func (ipv6 IPv6Addr) CmpPort(sa SockAddr) int {
var saPort IPPort
switch v := sa.(type) {
case IPv4Addr:
saPort = v.Port
case IPv6Addr:
saPort = v.Port
default:
return sortDeferDecision
}
switch {
case ipv6.Port == saPort:
return sortDeferDecision
case ipv6.Port < saPort:
return sortReceiverBeforeArg
default:
return sortArgBeforeReceiver
}
}
// CmpRFC follows the Cmp() standard protocol and returns:
//
// - -1 If the receiver should sort first because it belongs to the RFC and its
// arg does not
// - 0 if the receiver and arg both belong to the same RFC or neither do.
// - 1 If the arg belongs to the RFC but receiver does not.
func (ipv6 IPv6Addr) CmpRFC(rfcNum uint, sa SockAddr) int {
recvInRFC := IsRFC(rfcNum, ipv6)
ipv6b, ok := sa.(IPv6Addr)
if !ok {
// If the receiver is part of the desired RFC and the SockAddr
// argument is not, sort receiver before the non-IPv6 SockAddr.
// Conversely, if the receiver is not part of the RFC, punt on
// sorting and leave it for the next sorter.
if recvInRFC {
return sortReceiverBeforeArg
} else {
return sortDeferDecision
}
}
argInRFC := IsRFC(rfcNum, ipv6b)
switch {
case (recvInRFC && argInRFC), (!recvInRFC && !argInRFC):
// If a and b both belong to the RFC, or neither belong to
// rfcNum, defer sorting to the next sorter.
return sortDeferDecision
case recvInRFC && !argInRFC:
return sortReceiverBeforeArg
default:
return sortArgBeforeReceiver
}
}
// Contains returns true if the SockAddr is contained within the receiver.
func (ipv6 IPv6Addr) Contains(sa SockAddr) bool {
ipv6b, ok := sa.(IPv6Addr)
if !ok {
return false
}
return ipv6.ContainsNetwork(ipv6b)
}
// ContainsAddress returns true if the IPv6Address is contained within the
// receiver.
func (ipv6 IPv6Addr) ContainsAddress(x IPv6Address) bool {
xAddr := IPv6Addr{
Address: x,
Mask: ipv6HostMask,
}
{
xIPv6 := xAddr.FirstUsable().(IPv6Addr)
yIPv6 := ipv6.FirstUsable().(IPv6Addr)
if xIPv6.CmpAddress(yIPv6) >= 1 {
return false
}
}
{
xIPv6 := xAddr.LastUsable().(IPv6Addr)
yIPv6 := ipv6.LastUsable().(IPv6Addr)
if xIPv6.CmpAddress(yIPv6) <= -1 {
return false
}
}
return true
}
// ContainsNetwork returns true if the network from IPv6Addr is contained within
// the receiver.
func (x IPv6Addr) ContainsNetwork(y IPv6Addr) bool {
{
xIPv6 := x.FirstUsable().(IPv6Addr)
yIPv6 := y.FirstUsable().(IPv6Addr)
if ret := xIPv6.CmpAddress(yIPv6); ret >= 1 {
return false
}
}
{
xIPv6 := x.LastUsable().(IPv6Addr)
yIPv6 := y.LastUsable().(IPv6Addr)
if ret := xIPv6.CmpAddress(yIPv6); ret <= -1 {
return false
}
}
return true
}
// DialPacketArgs returns the arguments required to be passed to
// net.DialUDP(). If the Mask of ipv6 is not a /128 or the Port is 0,
// DialPacketArgs() will fail. See Host() to create an IPv6Addr with its
// mask set to /128.
func (ipv6 IPv6Addr) DialPacketArgs() (network, dialArgs string) {
ipv6Mask := big.Int(*ipv6.Mask)
if ipv6Mask.Cmp(ipv6HostMask) != 0 || ipv6.Port == 0 {
return "udp6", ""
}
return "udp6", fmt.Sprintf("[%s]:%d", ipv6.NetIP().String(), ipv6.Port)
}
// DialStreamArgs returns the arguments required to be passed to
// net.DialTCP(). If the Mask of ipv6 is not a /128 or the Port is 0,
// DialStreamArgs() will fail. See Host() to create an IPv6Addr with its
// mask set to /128.
func (ipv6 IPv6Addr) DialStreamArgs() (network, dialArgs string) {
ipv6Mask := big.Int(*ipv6.Mask)
if ipv6Mask.Cmp(ipv6HostMask) != 0 || ipv6.Port == 0 {
return "tcp6", ""
}
return "tcp6", fmt.Sprintf("[%s]:%d", ipv6.NetIP().String(), ipv6.Port)
}
// Equal returns true if a SockAddr is equal to the receiving IPv4Addr.
func (ipv6a IPv6Addr) Equal(sa SockAddr) bool {
ipv6b, ok := sa.(IPv6Addr)
if !ok {
return false
}
if ipv6a.NetIP().String() != ipv6b.NetIP().String() {
return false
}
if ipv6a.NetIPNet().String() != ipv6b.NetIPNet().String() {
return false
}
if ipv6a.Port != ipv6b.Port {
return false
}
return true
}
// FirstUsable returns an IPv6Addr set to the first address following the
// network prefix. The first usable address in a network is normally the
// gateway and should not be used except by devices forwarding packets
// between two administratively distinct networks (i.e. a router). This
// function does not discriminate against first usable vs "first address that
// should be used." For example, FirstUsable() on "2001:0db8::0003/64" would
// return "2001:0db8::00011".
func (ipv6 IPv6Addr) FirstUsable() IPAddr {
return IPv6Addr{
Address: IPv6Address(ipv6.NetworkAddress()),
Mask: ipv6HostMask,
}
}
// Host returns a copy of ipv6 with its mask set to /128 so that it can be
// used by DialPacketArgs(), DialStreamArgs(), ListenPacketArgs(), or
// ListenStreamArgs().
func (ipv6 IPv6Addr) Host() IPAddr {
// Nothing should listen on a broadcast address.
return IPv6Addr{
Address: ipv6.Address,
Mask: ipv6HostMask,
Port: ipv6.Port,
}
}
// IPPort returns the Port number attached to the IPv6Addr
func (ipv6 IPv6Addr) IPPort() IPPort {
return ipv6.Port
}
// LastUsable returns the last address in a given network.
func (ipv6 IPv6Addr) LastUsable() IPAddr {
addr := new(big.Int)
addr.Set(ipv6.Address)
mask := new(big.Int)
mask.Set(ipv6.Mask)
negMask := new(big.Int)
negMask.Xor(ipv6HostMask, mask)
lastAddr := new(big.Int)
lastAddr.And(addr, mask)
lastAddr.Or(lastAddr, negMask)
return IPv6Addr{
Address: IPv6Address(lastAddr),
Mask: ipv6HostMask,
}
}
// ListenPacketArgs returns the arguments required to be passed to
// net.ListenUDP(). If the Mask of ipv6 is not a /128, ListenPacketArgs()
// will fail. See Host() to create an IPv6Addr with its mask set to /128.
func (ipv6 IPv6Addr) ListenPacketArgs() (network, listenArgs string) {
ipv6Mask := big.Int(*ipv6.Mask)
if ipv6Mask.Cmp(ipv6HostMask) != 0 {
return "udp6", ""
}
return "udp6", fmt.Sprintf("[%s]:%d", ipv6.NetIP().String(), ipv6.Port)
}
// ListenStreamArgs returns the arguments required to be passed to
// net.ListenTCP(). If the Mask of ipv6 is not a /128, ListenStreamArgs()
// will fail. See Host() to create an IPv6Addr with its mask set to /128.
func (ipv6 IPv6Addr) ListenStreamArgs() (network, listenArgs string) {
ipv6Mask := big.Int(*ipv6.Mask)
if ipv6Mask.Cmp(ipv6HostMask) != 0 {
return "tcp6", ""
}
return "tcp6", fmt.Sprintf("[%s]:%d", ipv6.NetIP().String(), ipv6.Port)
}
// Maskbits returns the number of network mask bits in a given IPv6Addr. For
// example, the Maskbits() of "2001:0db8::0003/64" would return 64.
func (ipv6 IPv6Addr) Maskbits() int {
maskOnes, _ := ipv6.NetIPNet().Mask.Size()
return maskOnes
}
// MustIPv6Addr is a helper method that must return an IPv6Addr or panic on
// invalid input.
func MustIPv6Addr(addr string) IPv6Addr {
ipv6, err := NewIPv6Addr(addr)
if err != nil {
panic(fmt.Sprintf("Unable to create an IPv6Addr from %+q: %v", addr, err))
}
return ipv6
}
// NetIP returns the address as a net.IP.
func (ipv6 IPv6Addr) NetIP() *net.IP {
return bigIntToNetIPv6(ipv6.Address)
}
// NetIPMask create a new net.IPMask from the IPv6Addr.
func (ipv6 IPv6Addr) NetIPMask() *net.IPMask {
ipv6Mask := make(net.IPMask, IPv6len)
m := big.Int(*ipv6.Mask)
copy(ipv6Mask, m.Bytes())
return &ipv6Mask
}
// Network returns a pointer to the net.IPNet within IPv4Addr receiver.
func (ipv6 IPv6Addr) NetIPNet() *net.IPNet {
ipv6net := &net.IPNet{}
ipv6net.IP = make(net.IP, IPv6len)
copy(ipv6net.IP, *ipv6.NetIP())
ipv6net.Mask = *ipv6.NetIPMask()
return ipv6net
}
// Network returns the network prefix or network address for a given network.
func (ipv6 IPv6Addr) Network() IPAddr {
return IPv6Addr{
Address: IPv6Address(ipv6.NetworkAddress()),
Mask: ipv6.Mask,
}
}
// NetworkAddress returns an IPv6Network of the IPv6Addr's network address.
func (ipv6 IPv6Addr) NetworkAddress() IPv6Network {
addr := new(big.Int)
addr.SetBytes((*ipv6.Address).Bytes())
mask := new(big.Int)
mask.SetBytes(*ipv6.NetIPMask())
netAddr := new(big.Int)
netAddr.And(addr, mask)
return IPv6Network(netAddr)
}
// Octets returns a slice of the 16 octets in an IPv6Addr's Address. The
// order of the bytes is big endian.
func (ipv6 IPv6Addr) Octets() []int {
x := make([]int, IPv6len)
for i, b := range *bigIntToNetIPv6(ipv6.Address) {
x[i] = int(b)
}
return x
}
// String returns a string representation of the IPv6Addr
func (ipv6 IPv6Addr) String() string {
if ipv6.Port != 0 {
return fmt.Sprintf("[%s]:%d", ipv6.NetIP().String(), ipv6.Port)
}
if ipv6.Maskbits() == 128 {
return ipv6.NetIP().String()
}
return fmt.Sprintf("%s/%d", ipv6.NetIP().String(), ipv6.Maskbits())
}
// Type is used as a type switch and returns TypeIPv6
func (IPv6Addr) Type() SockAddrType {
return TypeIPv6
}
// IPv6Attrs returns a list of attributes supported by the IPv6Addr type
func IPv6Attrs() []AttrName {
return ipv6AddrAttrs
}
// IPv6AddrAttr returns a string representation of an attribute for the given
// IPv6Addr.
func IPv6AddrAttr(ipv6 IPv6Addr, selector AttrName) string {
fn, found := ipv6AddrAttrMap[selector]
if !found {
return ""
}
return fn(ipv6)
}
// ipv6AddrInit is called once at init()
func ipv6AddrInit() {
// Sorted for human readability
ipv6AddrAttrs = []AttrName{
"size", // Same position as in IPv6 for output consistency
"uint128",
}
ipv6AddrAttrMap = map[AttrName]func(ipv6 IPv6Addr) string{
"size": func(ipv6 IPv6Addr) string {
netSize := big.NewInt(1)
netSize = netSize.Lsh(netSize, uint(IPv6len*8-ipv6.Maskbits()))
return netSize.Text(10)
},
"uint128": func(ipv6 IPv6Addr) string {
b := big.Int(*ipv6.Address)
return b.Text(10)
},
}
}
// bigIntToNetIPv6 is a helper function that correctly returns a net.IP with the
// correctly padded values.
func bigIntToNetIPv6(bi *big.Int) *net.IP {
x := make(net.IP, IPv6len)
ipv6Bytes := bi.Bytes()
// It's possibe for ipv6Bytes to be less than IPv6len bytes in size. If
// they are different sizes we to pad the size of response.
if len(ipv6Bytes) < IPv6len {
buf := new(bytes.Buffer)
buf.Grow(IPv6len)
for i := len(ipv6Bytes); i < IPv6len; i++ {
if err := binary.Write(buf, binary.BigEndian, byte(0)); err != nil {
panic(fmt.Sprintf("Unable to pad byte %d of input %v: %v", i, bi, err))
}
}
for _, b := range ipv6Bytes {
if err := binary.Write(buf, binary.BigEndian, b); err != nil {
panic(fmt.Sprintf("Unable to preserve endianness of input %v: %v", bi, err))
}
}
ipv6Bytes = buf.Bytes()
}
i := copy(x, ipv6Bytes)
if i != IPv6len {
panic("IPv6 wrong size")
}
return &x
}

948
vendor/github.com/hashicorp/go-sockaddr/rfc.go generated vendored Normal file
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@ -0,0 +1,948 @@
package sockaddr
// ForwardingBlacklist is a faux RFC that includes a list of non-forwardable IP
// blocks.
const ForwardingBlacklist = 4294967295
const ForwardingBlacklistRFC = "4294967295"
// IsRFC tests to see if an SockAddr matches the specified RFC
func IsRFC(rfcNum uint, sa SockAddr) bool {
rfcNetMap := KnownRFCs()
rfcNets, ok := rfcNetMap[rfcNum]
if !ok {
return false
}
var contained bool
for _, rfcNet := range rfcNets {
if rfcNet.Contains(sa) {
contained = true
break
}
}
return contained
}
// KnownRFCs returns an initial set of known RFCs.
//
// NOTE (sean@): As this list evolves over time, please submit patches to keep
// this list current. If something isn't right, inquire, as it may just be a
// bug on my part. Some of the inclusions were based on my judgement as to what
// would be a useful value (e.g. RFC3330).
//
// Useful resources:
//
// * https://www.iana.org/assignments/ipv6-address-space/ipv6-address-space.xhtml
// * https://www.iana.org/assignments/ipv6-unicast-address-assignments/ipv6-unicast-address-assignments.xhtml
// * https://www.iana.org/assignments/ipv6-address-space/ipv6-address-space.xhtml
func KnownRFCs() map[uint]SockAddrs {
// NOTE(sean@): Multiple SockAddrs per RFC lend themselves well to a
// RADIX tree, but `ENOTIME`. Patches welcome.
return map[uint]SockAddrs{
919: {
// [RFC919] Broadcasting Internet Datagrams
MustIPv4Addr("255.255.255.255/32"), // [RFC1122], §7 Broadcast IP Addressing - Proposed Standards
},
1122: {
// [RFC1122] Requirements for Internet Hosts -- Communication Layers
MustIPv4Addr("0.0.0.0/8"), // [RFC1122], §3.2.1.3
MustIPv4Addr("127.0.0.0/8"), // [RFC1122], §3.2.1.3
},
1112: {
// [RFC1112] Host Extensions for IP Multicasting
MustIPv4Addr("224.0.0.0/4"), // [RFC1112], §4 Host Group Addresses
},
1918: {
// [RFC1918] Address Allocation for Private Internets
MustIPv4Addr("10.0.0.0/8"),
MustIPv4Addr("172.16.0.0/12"),
MustIPv4Addr("192.168.0.0/16"),
},
2544: {
// [RFC2544] Benchmarking Methodology for Network
// Interconnect Devices
MustIPv4Addr("198.18.0.0/15"),
},
2765: {
// [RFC2765] Stateless IP/ICMP Translation Algorithm
// (SIIT) (obsoleted by RFCs 6145, which itself was
// later obsoleted by 7915).
// [RFC2765], §2.1 Addresses
MustIPv6Addr("0:0:0:0:0:ffff:0:0/96"),
},
2928: {
// [RFC2928] Initial IPv6 Sub-TLA ID Assignments
MustIPv6Addr("2001::/16"), // Superblock
//MustIPv6Addr("2001:0000::/23"), // IANA
//MustIPv6Addr("2001:0200::/23"), // APNIC
//MustIPv6Addr("2001:0400::/23"), // ARIN
//MustIPv6Addr("2001:0600::/23"), // RIPE NCC
//MustIPv6Addr("2001:0800::/23"), // (future assignment)
// ...
//MustIPv6Addr("2001:FE00::/23"), // (future assignment)
},
3056: { // 6to4 address
// [RFC3056] Connection of IPv6 Domains via IPv4 Clouds
// [RFC3056], §2 IPv6 Prefix Allocation
MustIPv6Addr("2002::/16"),
},
3068: {
// [RFC3068] An Anycast Prefix for 6to4 Relay Routers
// (obsolete by RFC7526)
// [RFC3068], § 6to4 Relay anycast address
MustIPv4Addr("192.88.99.0/24"),
// [RFC3068], §2.5 6to4 IPv6 relay anycast address
//
// NOTE: /120 == 128-(32-24)
MustIPv6Addr("2002:c058:6301::/120"),
},
3171: {
// [RFC3171] IANA Guidelines for IPv4 Multicast Address Assignments
MustIPv4Addr("224.0.0.0/4"),
},
3330: {
// [RFC3330] Special-Use IPv4 Addresses
// Addresses in this block refer to source hosts on
// "this" network. Address 0.0.0.0/32 may be used as a
// source address for this host on this network; other
// addresses within 0.0.0.0/8 may be used to refer to
// specified hosts on this network [RFC1700, page 4].
MustIPv4Addr("0.0.0.0/8"),
// 10.0.0.0/8 - This block is set aside for use in
// private networks. Its intended use is documented in
// [RFC1918]. Addresses within this block should not
// appear on the public Internet.
MustIPv4Addr("10.0.0.0/8"),
// 14.0.0.0/8 - This block is set aside for assignments
// to the international system of Public Data Networks
// [RFC1700, page 181]. The registry of assignments
// within this block can be accessed from the "Public
// Data Network Numbers" link on the web page at
// http://www.iana.org/numbers.html. Addresses within
// this block are assigned to users and should be
// treated as such.
// 24.0.0.0/8 - This block was allocated in early 1996
// for use in provisioning IP service over cable
// television systems. Although the IANA initially was
// involved in making assignments to cable operators,
// this responsibility was transferred to American
// Registry for Internet Numbers (ARIN) in May 2001.
// Addresses within this block are assigned in the
// normal manner and should be treated as such.
// 39.0.0.0/8 - This block was used in the "Class A
// Subnet Experiment" that commenced in May 1995, as
// documented in [RFC1797]. The experiment has been
// completed and this block has been returned to the
// pool of addresses reserved for future allocation or
// assignment. This block therefore no longer has a
// special use and is subject to allocation to a
// Regional Internet Registry for assignment in the
// normal manner.
// 127.0.0.0/8 - This block is assigned for use as the Internet host
// loopback address. A datagram sent by a higher level protocol to an
// address anywhere within this block should loop back inside the host.
// This is ordinarily implemented using only 127.0.0.1/32 for loopback,
// but no addresses within this block should ever appear on any network
// anywhere [RFC1700, page 5].
MustIPv4Addr("127.0.0.0/8"),
// 128.0.0.0/16 - This block, corresponding to the
// numerically lowest of the former Class B addresses,
// was initially and is still reserved by the IANA.
// Given the present classless nature of the IP address
// space, the basis for the reservation no longer
// applies and addresses in this block are subject to
// future allocation to a Regional Internet Registry for
// assignment in the normal manner.
// 169.254.0.0/16 - This is the "link local" block. It
// is allocated for communication between hosts on a
// single link. Hosts obtain these addresses by
// auto-configuration, such as when a DHCP server may
// not be found.
MustIPv4Addr("169.254.0.0/16"),
// 172.16.0.0/12 - This block is set aside for use in
// private networks. Its intended use is documented in
// [RFC1918]. Addresses within this block should not
// appear on the public Internet.
MustIPv4Addr("172.16.0.0/12"),
// 191.255.0.0/16 - This block, corresponding to the numerically highest
// to the former Class B addresses, was initially and is still reserved
// by the IANA. Given the present classless nature of the IP address
// space, the basis for the reservation no longer applies and addresses
// in this block are subject to future allocation to a Regional Internet
// Registry for assignment in the normal manner.
// 192.0.0.0/24 - This block, corresponding to the
// numerically lowest of the former Class C addresses,
// was initially and is still reserved by the IANA.
// Given the present classless nature of the IP address
// space, the basis for the reservation no longer
// applies and addresses in this block are subject to
// future allocation to a Regional Internet Registry for
// assignment in the normal manner.
// 192.0.2.0/24 - This block is assigned as "TEST-NET" for use in
// documentation and example code. It is often used in conjunction with
// domain names example.com or example.net in vendor and protocol
// documentation. Addresses within this block should not appear on the
// public Internet.
MustIPv4Addr("192.0.2.0/24"),
// 192.88.99.0/24 - This block is allocated for use as 6to4 relay
// anycast addresses, according to [RFC3068].
MustIPv4Addr("192.88.99.0/24"),
// 192.168.0.0/16 - This block is set aside for use in private networks.
// Its intended use is documented in [RFC1918]. Addresses within this
// block should not appear on the public Internet.
MustIPv4Addr("192.168.0.0/16"),
// 198.18.0.0/15 - This block has been allocated for use
// in benchmark tests of network interconnect devices.
// Its use is documented in [RFC2544].
MustIPv4Addr("198.18.0.0/15"),
// 223.255.255.0/24 - This block, corresponding to the
// numerically highest of the former Class C addresses,
// was initially and is still reserved by the IANA.
// Given the present classless nature of the IP address
// space, the basis for the reservation no longer
// applies and addresses in this block are subject to
// future allocation to a Regional Internet Registry for
// assignment in the normal manner.
// 224.0.0.0/4 - This block, formerly known as the Class
// D address space, is allocated for use in IPv4
// multicast address assignments. The IANA guidelines
// for assignments from this space are described in
// [RFC3171].
MustIPv4Addr("224.0.0.0/4"),
// 240.0.0.0/4 - This block, formerly known as the Class E address
// space, is reserved. The "limited broadcast" destination address
// 255.255.255.255 should never be forwarded outside the (sub-)net of
// the source. The remainder of this space is reserved
// for future use. [RFC1700, page 4]
MustIPv4Addr("240.0.0.0/4"),
},
3849: {
// [RFC3849] IPv6 Address Prefix Reserved for Documentation
MustIPv6Addr("2001:db8::/32"), // [RFC3849], §4 IANA Considerations
},
3927: {
// [RFC3927] Dynamic Configuration of IPv4 Link-Local Addresses
MustIPv4Addr("169.254.0.0/16"), // [RFC3927], §2.1 Link-Local Address Selection
},
4038: {
// [RFC4038] Application Aspects of IPv6 Transition
// [RFC4038], §4.2. IPv6 Applications in a Dual-Stack Node
MustIPv6Addr("0:0:0:0:0:ffff::/96"),
},
4193: {
// [RFC4193] Unique Local IPv6 Unicast Addresses
MustIPv6Addr("fc00::/7"),
},
4291: {
// [RFC4291] IP Version 6 Addressing Architecture
// [RFC4291], §2.5.2 The Unspecified Address
MustIPv6Addr("::/128"),
// [RFC4291], §2.5.3 The Loopback Address
MustIPv6Addr("::1/128"),
// [RFC4291], §2.5.5.1. IPv4-Compatible IPv6 Address
MustIPv6Addr("::/96"),
// [RFC4291], §2.5.5.2. IPv4-Mapped IPv6 Address
MustIPv6Addr("::ffff:0:0/96"),
// [RFC4291], §2.5.6 Link-Local IPv6 Unicast Addresses
MustIPv6Addr("fe80::/10"),
// [RFC4291], §2.5.7 Site-Local IPv6 Unicast Addresses
// (depreciated)
MustIPv6Addr("fec0::/10"),
// [RFC4291], §2.7 Multicast Addresses
MustIPv6Addr("ff00::/8"),
// IPv6 Multicast Information.
//
// In the following "table" below, `ff0x` is replaced
// with the following values depending on the scope of
// the query:
//
// IPv6 Multicast Scopes:
// * ff00/9 // reserved
// * ff01/9 // interface-local
// * ff02/9 // link-local
// * ff03/9 // realm-local
// * ff04/9 // admin-local
// * ff05/9 // site-local
// * ff08/9 // organization-local
// * ff0e/9 // global
// * ff0f/9 // reserved
//
// IPv6 Multicast Addresses:
// * ff0x::2 // All routers
// * ff02::5 // OSPFIGP
// * ff02::6 // OSPFIGP Designated Routers
// * ff02::9 // RIP Routers
// * ff02::a // EIGRP Routers
// * ff02::d // All PIM Routers
// * ff02::1a // All RPL Routers
// * ff0x::fb // mDNSv6
// * ff0x::101 // All Network Time Protocol (NTP) servers
// * ff02::1:1 // Link Name
// * ff02::1:2 // All-dhcp-agents
// * ff02::1:3 // Link-local Multicast Name Resolution
// * ff05::1:3 // All-dhcp-servers
// * ff02::1:ff00:0/104 // Solicited-node multicast address.
// * ff02::2:ff00:0/104 // Node Information Queries
},
4380: {
// [RFC4380] Teredo: Tunneling IPv6 over UDP through
// Network Address Translations (NATs)
// [RFC4380], §2.6 Global Teredo IPv6 Service Prefix
MustIPv6Addr("2001:0000::/32"),
},
4773: {
// [RFC4773] Administration of the IANA Special Purpose IPv6 Address Block
MustIPv6Addr("2001:0000::/23"), // IANA
},
4843: {
// [RFC4843] An IPv6 Prefix for Overlay Routable Cryptographic Hash Identifiers (ORCHID)
MustIPv6Addr("2001:10::/28"), // [RFC4843], §7 IANA Considerations
},
5180: {
// [RFC5180] IPv6 Benchmarking Methodology for Network Interconnect Devices
MustIPv6Addr("2001:0200::/48"), // [RFC5180], §8 IANA Considerations
},
5735: {
// [RFC5735] Special Use IPv4 Addresses
MustIPv4Addr("192.0.2.0/24"), // TEST-NET-1
MustIPv4Addr("198.51.100.0/24"), // TEST-NET-2
MustIPv4Addr("203.0.113.0/24"), // TEST-NET-3
MustIPv4Addr("198.18.0.0/15"), // Benchmarks
},
5737: {
// [RFC5737] IPv4 Address Blocks Reserved for Documentation
MustIPv4Addr("192.0.2.0/24"), // TEST-NET-1
MustIPv4Addr("198.51.100.0/24"), // TEST-NET-2
MustIPv4Addr("203.0.113.0/24"), // TEST-NET-3
},
6052: {
// [RFC6052] IPv6 Addressing of IPv4/IPv6 Translators
MustIPv6Addr("64:ff9b::/96"), // [RFC6052], §2.1. Well-Known Prefix
},
6333: {
// [RFC6333] Dual-Stack Lite Broadband Deployments Following IPv4 Exhaustion
MustIPv4Addr("192.0.0.0/29"), // [RFC6333], §5.7 Well-Known IPv4 Address
},
6598: {
// [RFC6598] IANA-Reserved IPv4 Prefix for Shared Address Space
MustIPv4Addr("100.64.0.0/10"),
},
6666: {
// [RFC6666] A Discard Prefix for IPv6
MustIPv6Addr("0100::/64"),
},
6890: {
// [RFC6890] Special-Purpose IP Address Registries
// From "RFC6890 §2.2.1 Information Requirements":
/*
The IPv4 and IPv6 Special-Purpose Address Registries maintain the
following information regarding each entry:
o Address Block - A block of IPv4 or IPv6 addresses that has been
registered for a special purpose.
o Name - A descriptive name for the special-purpose address block.
o RFC - The RFC through which the special-purpose address block was
requested.
o Allocation Date - The date upon which the special-purpose address
block was allocated.
o Termination Date - The date upon which the allocation is to be
terminated. This field is applicable for limited-use allocations
only.
o Source - A boolean value indicating whether an address from the
allocated special-purpose address block is valid when used as the
source address of an IP datagram that transits two devices.
o Destination - A boolean value indicating whether an address from
the allocated special-purpose address block is valid when used as
the destination address of an IP datagram that transits two
devices.
o Forwardable - A boolean value indicating whether a router may
forward an IP datagram whose destination address is drawn from the
allocated special-purpose address block between external
interfaces.
o Global - A boolean value indicating whether an IP datagram whose
destination address is drawn from the allocated special-purpose
address block is forwardable beyond a specified administrative
domain.
o Reserved-by-Protocol - A boolean value indicating whether the
special-purpose address block is reserved by IP, itself. This
value is "TRUE" if the RFC that created the special-purpose
address block requires all compliant IP implementations to behave
in a special way when processing packets either to or from
addresses contained by the address block.
If the value of "Destination" is FALSE, the values of "Forwardable"
and "Global" must also be false.
*/
/*+----------------------+----------------------------+
* | Attribute | Value |
* +----------------------+----------------------------+
* | Address Block | 0.0.0.0/8 |
* | Name | "This host on this network"|
* | RFC | [RFC1122], Section 3.2.1.3 |
* | Allocation Date | September 1981 |
* | Termination Date | N/A |
* | Source | True |
* | Destination | False |
* | Forwardable | False |
* | Global | False |
* | Reserved-by-Protocol | True |
* +----------------------+----------------------------+*/
MustIPv4Addr("0.0.0.0/8"),
/*+----------------------+---------------+
* | Attribute | Value |
* +----------------------+---------------+
* | Address Block | 10.0.0.0/8 |
* | Name | Private-Use |
* | RFC | [RFC1918] |
* | Allocation Date | February 1996 |
* | Termination Date | N/A |
* | Source | True |
* | Destination | True |
* | Forwardable | True |
* | Global | False |
* | Reserved-by-Protocol | False |
* +----------------------+---------------+ */
MustIPv4Addr("10.0.0.0/8"),
/*+----------------------+----------------------+
| Attribute | Value |
+----------------------+----------------------+
| Address Block | 100.64.0.0/10 |
| Name | Shared Address Space |
| RFC | [RFC6598] |
| Allocation Date | April 2012 |
| Termination Date | N/A |
| Source | True |
| Destination | True |
| Forwardable | True |
| Global | False |
| Reserved-by-Protocol | False |
+----------------------+----------------------+*/
MustIPv4Addr("100.64.0.0/10"),
/*+----------------------+----------------------------+
| Attribute | Value |
+----------------------+----------------------------+
| Address Block | 127.0.0.0/8 |
| Name | Loopback |
| RFC | [RFC1122], Section 3.2.1.3 |
| Allocation Date | September 1981 |
| Termination Date | N/A |
| Source | False [1] |
| Destination | False [1] |
| Forwardable | False [1] |
| Global | False [1] |
| Reserved-by-Protocol | True |
+----------------------+----------------------------+*/
// [1] Several protocols have been granted exceptions to
// this rule. For examples, see [RFC4379] and
// [RFC5884].
MustIPv4Addr("127.0.0.0/8"),
/*+----------------------+----------------+
| Attribute | Value |
+----------------------+----------------+
| Address Block | 169.254.0.0/16 |
| Name | Link Local |
| RFC | [RFC3927] |
| Allocation Date | May 2005 |
| Termination Date | N/A |
| Source | True |
| Destination | True |
| Forwardable | False |
| Global | False |
| Reserved-by-Protocol | True |
+----------------------+----------------+*/
MustIPv4Addr("169.254.0.0/16"),
/*+----------------------+---------------+
| Attribute | Value |
+----------------------+---------------+
| Address Block | 172.16.0.0/12 |
| Name | Private-Use |
| RFC | [RFC1918] |
| Allocation Date | February 1996 |
| Termination Date | N/A |
| Source | True |
| Destination | True |
| Forwardable | True |
| Global | False |
| Reserved-by-Protocol | False |
+----------------------+---------------+*/
MustIPv4Addr("172.16.0.0/12"),
/*+----------------------+---------------------------------+
| Attribute | Value |
+----------------------+---------------------------------+
| Address Block | 192.0.0.0/24 [2] |
| Name | IETF Protocol Assignments |
| RFC | Section 2.1 of this document |
| Allocation Date | January 2010 |
| Termination Date | N/A |
| Source | False |
| Destination | False |
| Forwardable | False |
| Global | False |
| Reserved-by-Protocol | False |
+----------------------+---------------------------------+*/
// [2] Not usable unless by virtue of a more specific
// reservation.
MustIPv4Addr("192.0.0.0/24"),
/*+----------------------+--------------------------------+
| Attribute | Value |
+----------------------+--------------------------------+
| Address Block | 192.0.0.0/29 |
| Name | IPv4 Service Continuity Prefix |
| RFC | [RFC6333], [RFC7335] |
| Allocation Date | June 2011 |
| Termination Date | N/A |
| Source | True |
| Destination | True |
| Forwardable | True |
| Global | False |
| Reserved-by-Protocol | False |
+----------------------+--------------------------------+*/
MustIPv4Addr("192.0.0.0/29"),
/*+----------------------+----------------------------+
| Attribute | Value |
+----------------------+----------------------------+
| Address Block | 192.0.2.0/24 |
| Name | Documentation (TEST-NET-1) |
| RFC | [RFC5737] |
| Allocation Date | January 2010 |
| Termination Date | N/A |
| Source | False |
| Destination | False |
| Forwardable | False |
| Global | False |
| Reserved-by-Protocol | False |
+----------------------+----------------------------+*/
MustIPv4Addr("192.0.2.0/24"),
/*+----------------------+--------------------+
| Attribute | Value |
+----------------------+--------------------+
| Address Block | 192.88.99.0/24 |
| Name | 6to4 Relay Anycast |
| RFC | [RFC3068] |
| Allocation Date | June 2001 |
| Termination Date | N/A |
| Source | True |
| Destination | True |
| Forwardable | True |
| Global | True |
| Reserved-by-Protocol | False |
+----------------------+--------------------+*/
MustIPv4Addr("192.88.99.0/24"),
/*+----------------------+----------------+
| Attribute | Value |
+----------------------+----------------+
| Address Block | 192.168.0.0/16 |
| Name | Private-Use |
| RFC | [RFC1918] |
| Allocation Date | February 1996 |
| Termination Date | N/A |
| Source | True |
| Destination | True |
| Forwardable | True |
| Global | False |
| Reserved-by-Protocol | False |
+----------------------+----------------+*/
MustIPv4Addr("192.168.0.0/16"),
/*+----------------------+---------------+
| Attribute | Value |
+----------------------+---------------+
| Address Block | 198.18.0.0/15 |
| Name | Benchmarking |
| RFC | [RFC2544] |
| Allocation Date | March 1999 |
| Termination Date | N/A |
| Source | True |
| Destination | True |
| Forwardable | True |
| Global | False |
| Reserved-by-Protocol | False |
+----------------------+---------------+*/
MustIPv4Addr("198.18.0.0/15"),
/*+----------------------+----------------------------+
| Attribute | Value |
+----------------------+----------------------------+
| Address Block | 198.51.100.0/24 |
| Name | Documentation (TEST-NET-2) |
| RFC | [RFC5737] |
| Allocation Date | January 2010 |
| Termination Date | N/A |
| Source | False |
| Destination | False |
| Forwardable | False |
| Global | False |
| Reserved-by-Protocol | False |
+----------------------+----------------------------+*/
MustIPv4Addr("198.51.100.0/24"),
/*+----------------------+----------------------------+
| Attribute | Value |
+----------------------+----------------------------+
| Address Block | 203.0.113.0/24 |
| Name | Documentation (TEST-NET-3) |
| RFC | [RFC5737] |
| Allocation Date | January 2010 |
| Termination Date | N/A |
| Source | False |
| Destination | False |
| Forwardable | False |
| Global | False |
| Reserved-by-Protocol | False |
+----------------------+----------------------------+*/
MustIPv4Addr("203.0.113.0/24"),
/*+----------------------+----------------------+
| Attribute | Value |
+----------------------+----------------------+
| Address Block | 240.0.0.0/4 |
| Name | Reserved |
| RFC | [RFC1112], Section 4 |
| Allocation Date | August 1989 |
| Termination Date | N/A |
| Source | False |
| Destination | False |
| Forwardable | False |
| Global | False |
| Reserved-by-Protocol | True |
+----------------------+----------------------+*/
MustIPv4Addr("240.0.0.0/4"),
/*+----------------------+----------------------+
| Attribute | Value |
+----------------------+----------------------+
| Address Block | 255.255.255.255/32 |
| Name | Limited Broadcast |
| RFC | [RFC0919], Section 7 |
| Allocation Date | October 1984 |
| Termination Date | N/A |
| Source | False |
| Destination | True |
| Forwardable | False |
| Global | False |
| Reserved-by-Protocol | False |
+----------------------+----------------------+*/
MustIPv4Addr("255.255.255.255/32"),
/*+----------------------+------------------+
| Attribute | Value |
+----------------------+------------------+
| Address Block | ::1/128 |
| Name | Loopback Address |
| RFC | [RFC4291] |
| Allocation Date | February 2006 |
| Termination Date | N/A |
| Source | False |
| Destination | False |
| Forwardable | False |
| Global | False |
| Reserved-by-Protocol | True |
+----------------------+------------------+*/
MustIPv6Addr("::1/128"),
/*+----------------------+---------------------+
| Attribute | Value |
+----------------------+---------------------+
| Address Block | ::/128 |
| Name | Unspecified Address |
| RFC | [RFC4291] |
| Allocation Date | February 2006 |
| Termination Date | N/A |
| Source | True |
| Destination | False |
| Forwardable | False |
| Global | False |
| Reserved-by-Protocol | True |
+----------------------+---------------------+*/
MustIPv6Addr("::/128"),
/*+----------------------+---------------------+
| Attribute | Value |
+----------------------+---------------------+
| Address Block | 64:ff9b::/96 |
| Name | IPv4-IPv6 Translat. |
| RFC | [RFC6052] |
| Allocation Date | October 2010 |
| Termination Date | N/A |
| Source | True |
| Destination | True |
| Forwardable | True |
| Global | True |
| Reserved-by-Protocol | False |
+----------------------+---------------------+*/
MustIPv6Addr("64:ff9b::/96"),
/*+----------------------+---------------------+
| Attribute | Value |
+----------------------+---------------------+
| Address Block | ::ffff:0:0/96 |
| Name | IPv4-mapped Address |
| RFC | [RFC4291] |
| Allocation Date | February 2006 |
| Termination Date | N/A |
| Source | False |
| Destination | False |
| Forwardable | False |
| Global | False |
| Reserved-by-Protocol | True |
+----------------------+---------------------+*/
MustIPv6Addr("::ffff:0:0/96"),
/*+----------------------+----------------------------+
| Attribute | Value |
+----------------------+----------------------------+
| Address Block | 100::/64 |
| Name | Discard-Only Address Block |
| RFC | [RFC6666] |
| Allocation Date | June 2012 |
| Termination Date | N/A |
| Source | True |
| Destination | True |
| Forwardable | True |
| Global | False |
| Reserved-by-Protocol | False |
+----------------------+----------------------------+*/
MustIPv6Addr("100::/64"),
/*+----------------------+---------------------------+
| Attribute | Value |
+----------------------+---------------------------+
| Address Block | 2001::/23 |
| Name | IETF Protocol Assignments |
| RFC | [RFC2928] |
| Allocation Date | September 2000 |
| Termination Date | N/A |
| Source | False[1] |
| Destination | False[1] |
| Forwardable | False[1] |
| Global | False[1] |
| Reserved-by-Protocol | False |
+----------------------+---------------------------+*/
// [1] Unless allowed by a more specific allocation.
MustIPv6Addr("2001::/16"),
/*+----------------------+----------------+
| Attribute | Value |
+----------------------+----------------+
| Address Block | 2001::/32 |
| Name | TEREDO |
| RFC | [RFC4380] |
| Allocation Date | January 2006 |
| Termination Date | N/A |
| Source | True |
| Destination | True |
| Forwardable | True |
| Global | False |
| Reserved-by-Protocol | False |
+----------------------+----------------+*/
// Covered by previous entry, included for completeness.
//
// MustIPv6Addr("2001::/16"),
/*+----------------------+----------------+
| Attribute | Value |
+----------------------+----------------+
| Address Block | 2001:2::/48 |
| Name | Benchmarking |
| RFC | [RFC5180] |
| Allocation Date | April 2008 |
| Termination Date | N/A |
| Source | True |
| Destination | True |
| Forwardable | True |
| Global | False |
| Reserved-by-Protocol | False |
+----------------------+----------------+*/
// Covered by previous entry, included for completeness.
//
// MustIPv6Addr("2001:2::/48"),
/*+----------------------+---------------+
| Attribute | Value |
+----------------------+---------------+
| Address Block | 2001:db8::/32 |
| Name | Documentation |
| RFC | [RFC3849] |
| Allocation Date | July 2004 |
| Termination Date | N/A |
| Source | False |
| Destination | False |
| Forwardable | False |
| Global | False |
| Reserved-by-Protocol | False |
+----------------------+---------------+*/
// Covered by previous entry, included for completeness.
//
// MustIPv6Addr("2001:db8::/32"),
/*+----------------------+--------------+
| Attribute | Value |
+----------------------+--------------+
| Address Block | 2001:10::/28 |
| Name | ORCHID |
| RFC | [RFC4843] |
| Allocation Date | March 2007 |
| Termination Date | March 2014 |
| Source | False |
| Destination | False |
| Forwardable | False |
| Global | False |
| Reserved-by-Protocol | False |
+----------------------+--------------+*/
// Covered by previous entry, included for completeness.
//
// MustIPv6Addr("2001:10::/28"),
/*+----------------------+---------------+
| Attribute | Value |
+----------------------+---------------+
| Address Block | 2002::/16 [2] |
| Name | 6to4 |
| RFC | [RFC3056] |
| Allocation Date | February 2001 |
| Termination Date | N/A |
| Source | True |
| Destination | True |
| Forwardable | True |
| Global | N/A [2] |
| Reserved-by-Protocol | False |
+----------------------+---------------+*/
// [2] See [RFC3056] for details.
MustIPv6Addr("2002::/16"),
/*+----------------------+--------------+
| Attribute | Value |
+----------------------+--------------+
| Address Block | fc00::/7 |
| Name | Unique-Local |
| RFC | [RFC4193] |
| Allocation Date | October 2005 |
| Termination Date | N/A |
| Source | True |
| Destination | True |
| Forwardable | True |
| Global | False |
| Reserved-by-Protocol | False |
+----------------------+--------------+*/
MustIPv6Addr("fc00::/7"),
/*+----------------------+-----------------------+
| Attribute | Value |
+----------------------+-----------------------+
| Address Block | fe80::/10 |
| Name | Linked-Scoped Unicast |
| RFC | [RFC4291] |
| Allocation Date | February 2006 |
| Termination Date | N/A |
| Source | True |
| Destination | True |
| Forwardable | False |
| Global | False |
| Reserved-by-Protocol | True |
+----------------------+-----------------------+*/
MustIPv6Addr("fe80::/10"),
},
7335: {
// [RFC7335] IPv4 Service Continuity Prefix
MustIPv4Addr("192.0.0.0/29"), // [RFC7335], §6 IANA Considerations
},
ForwardingBlacklist: { // Pseudo-RFC
// Blacklist of non-forwardable IP blocks taken from RFC6890
//
// TODO: the attributes for forwardable should be
// searcahble and embedded in the main list of RFCs
// above.
MustIPv4Addr("0.0.0.0/8"),
MustIPv4Addr("127.0.0.0/8"),
MustIPv4Addr("169.254.0.0/16"),
MustIPv4Addr("192.0.0.0/24"),
MustIPv4Addr("192.0.2.0/24"),
MustIPv4Addr("198.51.100.0/24"),
MustIPv4Addr("203.0.113.0/24"),
MustIPv4Addr("240.0.0.0/4"),
MustIPv4Addr("255.255.255.255/32"),
MustIPv6Addr("::1/128"),
MustIPv6Addr("::/128"),
MustIPv6Addr("::ffff:0:0/96"),
// There is no way of expressing a whitelist per RFC2928
// atm without creating a negative mask, which I don't
// want to do atm.
//MustIPv6Addr("2001::/23"),
MustIPv6Addr("2001:db8::/32"),
MustIPv6Addr("2001:10::/28"),
MustIPv6Addr("fe80::/10"),
},
}
}
// VisitAllRFCs iterates over all known RFCs and calls the visitor
func VisitAllRFCs(fn func(rfcNum uint, sockaddrs SockAddrs)) {
rfcNetMap := KnownRFCs()
// Blacklist of faux-RFCs. Don't show the world that we're abusing the
// RFC system in this library.
rfcBlacklist := map[uint]struct{}{
ForwardingBlacklist: {},
}
for rfcNum, sas := range rfcNetMap {
if _, found := rfcBlacklist[rfcNum]; !found {
fn(rfcNum, sas)
}
}
}

19
vendor/github.com/hashicorp/go-sockaddr/route_info.go generated vendored Normal file
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@ -0,0 +1,19 @@
package sockaddr
// RouteInterface specifies an interface for obtaining memoized route table and
// network information from a given OS.
type RouteInterface interface {
// GetDefaultInterfaceName returns the name of the interface that has a
// default route or an error and an empty string if a problem was
// encountered.
GetDefaultInterfaceName() (string, error)
}
// VisitCommands visits each command used by the platform-specific RouteInfo
// implementation.
func (ri routeInfo) VisitCommands(fn func(name string, cmd []string)) {
for k, v := range ri.cmds {
cmds := append([]string(nil), v...)
fn(k, cmds)
}
}

34
vendor/github.com/hashicorp/go-sockaddr/route_info_android.go generated vendored Normal file
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@ -0,0 +1,34 @@
package sockaddr
import (
"errors"
"os/exec"
)
type routeInfo struct {
cmds map[string][]string
}
// NewRouteInfo returns a Android-specific implementation of the RouteInfo
// interface.
func NewRouteInfo() (routeInfo, error) {
return routeInfo{
cmds: map[string][]string{"ip": {"/system/bin/ip", "route", "get", "8.8.8.8"}},
}, nil
}
// GetDefaultInterfaceName returns the interface name attached to the default
// route on the default interface.
func (ri routeInfo) GetDefaultInterfaceName() (string, error) {
out, err := exec.Command(ri.cmds["ip"][0], ri.cmds["ip"][1:]...).Output()
if err != nil {
return "", err
}
var ifName string
if ifName, err = parseDefaultIfNameFromIPCmdAndroid(string(out)); err != nil {
return "", errors.New("No default interface found")
}
return ifName, nil
}

36
vendor/github.com/hashicorp/go-sockaddr/route_info_bsd.go generated vendored Normal file
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@ -0,0 +1,36 @@
// +build darwin dragonfly freebsd netbsd openbsd
package sockaddr
import "os/exec"
var cmds map[string][]string = map[string][]string{
"route": {"/sbin/route", "-n", "get", "default"},
}
type routeInfo struct {
cmds map[string][]string
}
// NewRouteInfo returns a BSD-specific implementation of the RouteInfo
// interface.
func NewRouteInfo() (routeInfo, error) {
return routeInfo{
cmds: cmds,
}, nil
}
// GetDefaultInterfaceName returns the interface name attached to the default
// route on the default interface.
func (ri routeInfo) GetDefaultInterfaceName() (string, error) {
out, err := exec.Command(cmds["route"][0], cmds["route"][1:]...).Output()
if err != nil {
return "", err
}
var ifName string
if ifName, err = parseDefaultIfNameFromRoute(string(out)); err != nil {
return "", err
}
return ifName, nil
}

10
vendor/github.com/hashicorp/go-sockaddr/route_info_default.go generated vendored Normal file
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@ -0,0 +1,10 @@
// +build android nacl plan9
package sockaddr
import "errors"
// getDefaultIfName is the default interface function for unsupported platforms.
func getDefaultIfName() (string, error) {
return "", errors.New("No default interface found (unsupported platform)")
}

42
vendor/github.com/hashicorp/go-sockaddr/route_info_linux.go generated vendored Normal file
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@ -0,0 +1,42 @@
// +build !android
package sockaddr
import (
"errors"
"os/exec"
)
type routeInfo struct {
cmds map[string][]string
}
// NewRouteInfo returns a Linux-specific implementation of the RouteInfo
// interface.
func NewRouteInfo() (routeInfo, error) {
// CoreOS Container Linux moved ip to /usr/bin/ip, so look it up on
// $PATH and fallback to /sbin/ip on error.
path, _ := exec.LookPath("ip")
if path == "" {
path = "/sbin/ip"
}
return routeInfo{
cmds: map[string][]string{"ip": {path, "route"}},
}, nil
}
// GetDefaultInterfaceName returns the interface name attached to the default
// route on the default interface.
func (ri routeInfo) GetDefaultInterfaceName() (string, error) {
out, err := exec.Command(ri.cmds["ip"][0], ri.cmds["ip"][1:]...).Output()
if err != nil {
return "", err
}
var ifName string
if ifName, err = parseDefaultIfNameFromIPCmd(string(out)); err != nil {
return "", errors.New("No default interface found")
}
return ifName, nil
}

37
vendor/github.com/hashicorp/go-sockaddr/route_info_solaris.go generated vendored Normal file
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@ -0,0 +1,37 @@
package sockaddr
import (
"errors"
"os/exec"
)
var cmds map[string][]string = map[string][]string{
"route": {"/usr/sbin/route", "-n", "get", "default"},
}
type routeInfo struct {
cmds map[string][]string
}
// NewRouteInfo returns a BSD-specific implementation of the RouteInfo
// interface.
func NewRouteInfo() (routeInfo, error) {
return routeInfo{
cmds: cmds,
}, nil
}
// GetDefaultInterfaceName returns the interface name attached to the default
// route on the default interface.
func (ri routeInfo) GetDefaultInterfaceName() (string, error) {
out, err := exec.Command(cmds["route"][0], cmds["route"][1:]...).Output()
if err != nil {
return "", err
}
var ifName string
if ifName, err = parseDefaultIfNameFromRoute(string(out)); err != nil {
return "", errors.New("No default interface found")
}
return ifName, nil
}

41
vendor/github.com/hashicorp/go-sockaddr/route_info_windows.go generated vendored Normal file
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@ -0,0 +1,41 @@
package sockaddr
import "os/exec"
var cmds map[string][]string = map[string][]string{
"netstat": {"netstat", "-rn"},
"ipconfig": {"ipconfig"},
}
type routeInfo struct {
cmds map[string][]string
}
// NewRouteInfo returns a BSD-specific implementation of the RouteInfo
// interface.
func NewRouteInfo() (routeInfo, error) {
return routeInfo{
cmds: cmds,
}, nil
}
// GetDefaultInterfaceName returns the interface name attached to the default
// route on the default interface.
func (ri routeInfo) GetDefaultInterfaceName() (string, error) {
ifNameOut, err := exec.Command(cmds["netstat"][0], cmds["netstat"][1:]...).Output()
if err != nil {
return "", err
}
ipconfigOut, err := exec.Command(cmds["ipconfig"][0], cmds["ipconfig"][1:]...).Output()
if err != nil {
return "", err
}
ifName, err := parseDefaultIfNameWindows(string(ifNameOut), string(ipconfigOut))
if err != nil {
return "", err
}
return ifName, nil
}

206
vendor/github.com/hashicorp/go-sockaddr/sockaddr.go generated vendored Normal file
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@ -0,0 +1,206 @@
package sockaddr
import (
"encoding/json"
"fmt"
"strings"
)
type SockAddrType int
type AttrName string
const (
TypeUnknown SockAddrType = 0x0
TypeUnix = 0x1
TypeIPv4 = 0x2
TypeIPv6 = 0x4
// TypeIP is the union of TypeIPv4 and TypeIPv6
TypeIP = 0x6
)
type SockAddr interface {
// CmpRFC returns 0 if SockAddr exactly matches one of the matched RFC
// networks, -1 if the receiver is contained within the RFC network, or
// 1 if the address is not contained within the RFC.
CmpRFC(rfcNum uint, sa SockAddr) int
// Contains returns true if the SockAddr arg is contained within the
// receiver
Contains(SockAddr) bool
// Equal allows for the comparison of two SockAddrs
Equal(SockAddr) bool
DialPacketArgs() (string, string)
DialStreamArgs() (string, string)
ListenPacketArgs() (string, string)
ListenStreamArgs() (string, string)
// String returns the string representation of SockAddr
String() string
// Type returns the SockAddrType
Type() SockAddrType
}
// sockAddrAttrMap is a map of the SockAddr type-specific attributes.
var sockAddrAttrMap map[AttrName]func(SockAddr) string
var sockAddrAttrs []AttrName
func init() {
sockAddrInit()
}
// New creates a new SockAddr from the string. The order in which New()
// attempts to construct a SockAddr is: IPv4Addr, IPv6Addr, SockAddrUnix.
//
// NOTE: New() relies on the heuristic wherein if the path begins with either a
// '.' or '/' character before creating a new UnixSock. For UNIX sockets that
// are absolute paths or are nested within a sub-directory, this works as
// expected, however if the UNIX socket is contained in the current working
// directory, this will fail unless the path begins with "./"
// (e.g. "./my-local-socket"). Calls directly to NewUnixSock() do not suffer
// this limitation. Invalid IP addresses such as "256.0.0.0/-1" will run afoul
// of this heuristic and be assumed to be a valid UNIX socket path (which they
// are, but it is probably not what you want and you won't realize it until you
// stat(2) the file system to discover it doesn't exist).
func NewSockAddr(s string) (SockAddr, error) {
ipv4Addr, err := NewIPv4Addr(s)
if err == nil {
return ipv4Addr, nil
}
ipv6Addr, err := NewIPv6Addr(s)
if err == nil {
return ipv6Addr, nil
}
// Check to make sure the string begins with either a '.' or '/', or
// contains a '/'.
if len(s) > 1 && (strings.IndexAny(s[0:1], "./") != -1 || strings.IndexByte(s, '/') != -1) {
unixSock, err := NewUnixSock(s)
if err == nil {
return unixSock, nil
}
}
return nil, fmt.Errorf("Unable to convert %q to an IPv4 or IPv6 address, or a UNIX Socket", s)
}
// ToIPAddr returns an IPAddr type or nil if the type conversion fails.
func ToIPAddr(sa SockAddr) *IPAddr {
ipa, ok := sa.(IPAddr)
if !ok {
return nil
}
return &ipa
}
// ToIPv4Addr returns an IPv4Addr type or nil if the type conversion fails.
func ToIPv4Addr(sa SockAddr) *IPv4Addr {
switch v := sa.(type) {
case IPv4Addr:
return &v
default:
return nil
}
}
// ToIPv6Addr returns an IPv6Addr type or nil if the type conversion fails.
func ToIPv6Addr(sa SockAddr) *IPv6Addr {
switch v := sa.(type) {
case IPv6Addr:
return &v
default:
return nil
}
}
// ToUnixSock returns a UnixSock type or nil if the type conversion fails.
func ToUnixSock(sa SockAddr) *UnixSock {
switch v := sa.(type) {
case UnixSock:
return &v
default:
return nil
}
}
// SockAddrAttr returns a string representation of an attribute for the given
// SockAddr.
func SockAddrAttr(sa SockAddr, selector AttrName) string {
fn, found := sockAddrAttrMap[selector]
if !found {
return ""
}
return fn(sa)
}
// String() for SockAddrType returns a string representation of the
// SockAddrType (e.g. "IPv4", "IPv6", "UNIX", "IP", or "unknown").
func (sat SockAddrType) String() string {
switch sat {
case TypeIPv4:
return "IPv4"
case TypeIPv6:
return "IPv6"
// There is no concrete "IP" type. Leaving here as a reminder.
// case TypeIP:
// return "IP"
case TypeUnix:
return "UNIX"
default:
panic("unsupported type")
}
}
// sockAddrInit is called once at init()
func sockAddrInit() {
sockAddrAttrs = []AttrName{
"type", // type should be first
"string",
}
sockAddrAttrMap = map[AttrName]func(sa SockAddr) string{
"string": func(sa SockAddr) string {
return sa.String()
},
"type": func(sa SockAddr) string {
return sa.Type().String()
},
}
}
// UnixSockAttrs returns a list of attributes supported by the UnixSock type
func SockAddrAttrs() []AttrName {
return sockAddrAttrs
}
// Although this is pretty trivial to do in a program, having the logic here is
// useful all around. Note that this marshals into a *string* -- the underlying
// string representation of the sockaddr. If you then unmarshal into this type
// in Go, all will work as expected, but externally you can take what comes out
// and use the string value directly.
type SockAddrMarshaler struct {
SockAddr
}
func (s *SockAddrMarshaler) MarshalJSON() ([]byte, error) {
return json.Marshal(s.SockAddr.String())
}
func (s *SockAddrMarshaler) UnmarshalJSON(in []byte) error {
var str string
err := json.Unmarshal(in, &str)
if err != nil {
return err
}
sa, err := NewSockAddr(str)
if err != nil {
return err
}
s.SockAddr = sa
return nil
}

193
vendor/github.com/hashicorp/go-sockaddr/sockaddrs.go generated vendored Normal file
View File

@ -0,0 +1,193 @@
package sockaddr
import (
"bytes"
"sort"
)
// SockAddrs is a slice of SockAddrs
type SockAddrs []SockAddr
func (s SockAddrs) Len() int { return len(s) }
func (s SockAddrs) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
// CmpAddrFunc is the function signature that must be met to be used in the
// OrderedAddrBy multiAddrSorter
type CmpAddrFunc func(p1, p2 *SockAddr) int
// multiAddrSorter implements the Sort interface, sorting the SockAddrs within.
type multiAddrSorter struct {
addrs SockAddrs
cmp []CmpAddrFunc
}
// Sort sorts the argument slice according to the Cmp functions passed to
// OrderedAddrBy.
func (ms *multiAddrSorter) Sort(sockAddrs SockAddrs) {
ms.addrs = sockAddrs
sort.Sort(ms)
}
// OrderedAddrBy sorts SockAddr by the list of sort function pointers.
func OrderedAddrBy(cmpFuncs ...CmpAddrFunc) *multiAddrSorter {
return &multiAddrSorter{
cmp: cmpFuncs,
}
}
// Len is part of sort.Interface.
func (ms *multiAddrSorter) Len() int {
return len(ms.addrs)
}
// Less is part of sort.Interface. It is implemented by looping along the
// Cmp() functions until it finds a comparison that is either less than,
// equal to, or greater than.
func (ms *multiAddrSorter) Less(i, j int) bool {
p, q := &ms.addrs[i], &ms.addrs[j]
// Try all but the last comparison.
var k int
for k = 0; k < len(ms.cmp)-1; k++ {
cmp := ms.cmp[k]
x := cmp(p, q)
switch x {
case -1:
// p < q, so we have a decision.
return true
case 1:
// p > q, so we have a decision.
return false
}
// p == q; try the next comparison.
}
// All comparisons to here said "equal", so just return whatever the
// final comparison reports.
switch ms.cmp[k](p, q) {
case -1:
return true
case 1:
return false
default:
// Still a tie! Now what?
return false
}
}
// Swap is part of sort.Interface.
func (ms *multiAddrSorter) Swap(i, j int) {
ms.addrs[i], ms.addrs[j] = ms.addrs[j], ms.addrs[i]
}
const (
// NOTE (sean@): These constants are here for code readability only and
// are sprucing up the code for readability purposes. Some of the
// Cmp*() variants have confusing logic (especially when dealing with
// mixed-type comparisons) and this, I think, has made it easier to grok
// the code faster.
sortReceiverBeforeArg = -1
sortDeferDecision = 0
sortArgBeforeReceiver = 1
)
// AscAddress is a sorting function to sort SockAddrs by their respective
// address type. Non-equal types are deferred in the sort.
func AscAddress(p1Ptr, p2Ptr *SockAddr) int {
p1 := *p1Ptr
p2 := *p2Ptr
switch v := p1.(type) {
case IPv4Addr:
return v.CmpAddress(p2)
case IPv6Addr:
return v.CmpAddress(p2)
case UnixSock:
return v.CmpAddress(p2)
default:
return sortDeferDecision
}
}
// AscPort is a sorting function to sort SockAddrs by their respective address
// type. Non-equal types are deferred in the sort.
func AscPort(p1Ptr, p2Ptr *SockAddr) int {
p1 := *p1Ptr
p2 := *p2Ptr
switch v := p1.(type) {
case IPv4Addr:
return v.CmpPort(p2)
case IPv6Addr:
return v.CmpPort(p2)
default:
return sortDeferDecision
}
}
// AscPrivate is a sorting function to sort "more secure" private values before
// "more public" values. Both IPv4 and IPv6 are compared against RFC6890
// (RFC6890 includes, and is not limited to, RFC1918 and RFC6598 for IPv4, and
// IPv6 includes RFC4193).
func AscPrivate(p1Ptr, p2Ptr *SockAddr) int {
p1 := *p1Ptr
p2 := *p2Ptr
switch v := p1.(type) {
case IPv4Addr, IPv6Addr:
return v.CmpRFC(6890, p2)
default:
return sortDeferDecision
}
}
// AscNetworkSize is a sorting function to sort SockAddrs based on their network
// size. Non-equal types are deferred in the sort.
func AscNetworkSize(p1Ptr, p2Ptr *SockAddr) int {
p1 := *p1Ptr
p2 := *p2Ptr
p1Type := p1.Type()
p2Type := p2.Type()
// Network size operations on non-IP types make no sense
if p1Type != p2Type && p1Type != TypeIP {
return sortDeferDecision
}
ipA := p1.(IPAddr)
ipB := p2.(IPAddr)
return bytes.Compare([]byte(*ipA.NetIPMask()), []byte(*ipB.NetIPMask()))
}
// AscType is a sorting function to sort "more secure" types before
// "less-secure" types.
func AscType(p1Ptr, p2Ptr *SockAddr) int {
p1 := *p1Ptr
p2 := *p2Ptr
p1Type := p1.Type()
p2Type := p2.Type()
switch {
case p1Type < p2Type:
return sortReceiverBeforeArg
case p1Type == p2Type:
return sortDeferDecision
case p1Type > p2Type:
return sortArgBeforeReceiver
default:
return sortDeferDecision
}
}
// FilterByType returns two lists: a list of matched and unmatched SockAddrs
func (sas SockAddrs) FilterByType(type_ SockAddrType) (matched, excluded SockAddrs) {
matched = make(SockAddrs, 0, len(sas))
excluded = make(SockAddrs, 0, len(sas))
for _, sa := range sas {
if sa.Type()&type_ != 0 {
matched = append(matched, sa)
} else {
excluded = append(excluded, sa)
}
}
return matched, excluded
}

135
vendor/github.com/hashicorp/go-sockaddr/unixsock.go generated vendored Normal file
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@ -0,0 +1,135 @@
package sockaddr
import (
"fmt"
"strings"
)
type UnixSock struct {
SockAddr
path string
}
type UnixSocks []*UnixSock
// unixAttrMap is a map of the UnixSockAddr type-specific attributes.
var unixAttrMap map[AttrName]func(UnixSock) string
var unixAttrs []AttrName
func init() {
unixAttrInit()
}
// NewUnixSock creates an UnixSock from a string path. String can be in the
// form of either URI-based string (e.g. `file:///etc/passwd`), an absolute
// path (e.g. `/etc/passwd`), or a relative path (e.g. `./foo`).
func NewUnixSock(s string) (ret UnixSock, err error) {
ret.path = s
return ret, nil
}
// CmpAddress follows the Cmp() standard protocol and returns:
//
// - -1 If the receiver should sort first because its name lexically sorts before arg
// - 0 if the SockAddr arg is not a UnixSock, or is a UnixSock with the same path.
// - 1 If the argument should sort first.
func (us UnixSock) CmpAddress(sa SockAddr) int {
usb, ok := sa.(UnixSock)
if !ok {
return sortDeferDecision
}
return strings.Compare(us.Path(), usb.Path())
}
// DialPacketArgs returns the arguments required to be passed to net.DialUnix()
// with the `unixgram` network type.
func (us UnixSock) DialPacketArgs() (network, dialArgs string) {
return "unixgram", us.path
}
// DialStreamArgs returns the arguments required to be passed to net.DialUnix()
// with the `unix` network type.
func (us UnixSock) DialStreamArgs() (network, dialArgs string) {
return "unix", us.path
}
// Equal returns true if a SockAddr is equal to the receiving UnixSock.
func (us UnixSock) Equal(sa SockAddr) bool {
usb, ok := sa.(UnixSock)
if !ok {
return false
}
if us.Path() != usb.Path() {
return false
}
return true
}
// ListenPacketArgs returns the arguments required to be passed to
// net.ListenUnixgram() with the `unixgram` network type.
func (us UnixSock) ListenPacketArgs() (network, dialArgs string) {
return "unixgram", us.path
}
// ListenStreamArgs returns the arguments required to be passed to
// net.ListenUnix() with the `unix` network type.
func (us UnixSock) ListenStreamArgs() (network, dialArgs string) {
return "unix", us.path
}
// MustUnixSock is a helper method that must return an UnixSock or panic on
// invalid input.
func MustUnixSock(addr string) UnixSock {
us, err := NewUnixSock(addr)
if err != nil {
panic(fmt.Sprintf("Unable to create a UnixSock from %+q: %v", addr, err))
}
return us
}
// Path returns the given path of the UnixSock
func (us UnixSock) Path() string {
return us.path
}
// String returns the path of the UnixSock
func (us UnixSock) String() string {
return fmt.Sprintf("%+q", us.path)
}
// Type is used as a type switch and returns TypeUnix
func (UnixSock) Type() SockAddrType {
return TypeUnix
}
// UnixSockAttrs returns a list of attributes supported by the UnixSockAddr type
func UnixSockAttrs() []AttrName {
return unixAttrs
}
// UnixSockAttr returns a string representation of an attribute for the given
// UnixSock.
func UnixSockAttr(us UnixSock, attrName AttrName) string {
fn, found := unixAttrMap[attrName]
if !found {
return ""
}
return fn(us)
}
// unixAttrInit is called once at init()
func unixAttrInit() {
// Sorted for human readability
unixAttrs = []AttrName{
"path",
}
unixAttrMap = map[AttrName]func(us UnixSock) string{
"path": func(us UnixSock) string {
return us.Path()
},
}
}

22
vendor/github.com/hashicorp/golang-lru/lru.go generated vendored
View File

@ -37,7 +37,7 @@ func (c *Cache) Purge() {
c.lock.Unlock()
}
// Add adds a value to the cache. Returns true if an eviction occurred.
// Add adds a value to the cache. Returns true if an eviction occurred.
func (c *Cache) Add(key, value interface{}) (evicted bool) {
c.lock.Lock()
evicted = c.lru.Add(key, value)
@ -71,8 +71,8 @@ func (c *Cache) Peek(key interface{}) (value interface{}, ok bool) {
return value, ok
}
// ContainsOrAdd checks if a key is in the cache without updating the
// recent-ness or deleting it for being stale, and if not, adds the value.
// ContainsOrAdd checks if a key is in the cache without updating the
// recent-ness or deleting it for being stale, and if not, adds the value.
// Returns whether found and whether an eviction occurred.
func (c *Cache) ContainsOrAdd(key, value interface{}) (ok, evicted bool) {
c.lock.Lock()
@ -85,22 +85,6 @@ func (c *Cache) ContainsOrAdd(key, value interface{}) (ok, evicted bool) {
return false, evicted
}
// PeekOrAdd checks if a key is in the cache without updating the
// recent-ness or deleting it for being stale, and if not, adds the value.
// Returns whether found and whether an eviction occurred.
func (c *Cache) PeekOrAdd(key, value interface{}) (previous interface{}, ok, evicted bool) {
c.lock.Lock()
defer c.lock.Unlock()
previous, ok = c.lru.Peek(key)
if ok {
return previous, true, false
}
evicted = c.lru.Add(key, value)
return nil, false, evicted
}
// Remove removes the provided key from the cache.
func (c *Cache) Remove(key interface{}) (present bool) {
c.lock.Lock()

9
vendor/github.com/hashicorp/hcl/.gitignore generated vendored Normal file
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@ -0,0 +1,9 @@
y.output
# ignore intellij files
.idea
*.iml
*.ipr
*.iws
*.test

13
vendor/github.com/hashicorp/hcl/.travis.yml generated vendored Normal file
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@ -0,0 +1,13 @@
sudo: false
language: go
go:
- 1.x
- tip
branches:
only:
- master
script: make test

354
vendor/github.com/hashicorp/hcl/LICENSE generated vendored Normal file
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@ -0,0 +1,354 @@
Mozilla Public License, version 2.0
1. Definitions
1.1. “Contributor”
means each individual or legal entity that creates, contributes to the
creation of, or owns Covered Software.
1.2. “Contributor Version”
means the combination of the Contributions of others (if any) used by a
Contributor and that particular Contributor’s Contribution.
1.3. “Contribution”
means Covered Software of a particular Contributor.
1.4. “Covered Software”
means Source Code Form to which the initial Contributor has attached the
notice in Exhibit A, the Executable Form of such Source Code Form, and
Modifications of such Source Code Form, in each case including portions
thereof.
1.5. “Incompatible With Secondary Licenses”
means
a. that the initial Contributor has attached the notice described in
Exhibit B to the Covered Software; or
b. that the Covered Software was made available under the terms of version
1.1 or earlier of the License, but not also under the terms of a
Secondary License.
1.6. “Executable Form”
means any form of the work other than Source Code Form.
1.7. “Larger Work”
means a work that combines Covered Software with other material, in a separate
file or files, that is not Covered Software.
1.8. “License”
means this document.
1.9. “Licensable”
means having the right to grant, to the maximum extent possible, whether at the
time of the initial grant or subsequently, any and all of the rights conveyed by
this License.
1.10. “Modifications”
means any of the following:
a. any file in Source Code Form that results from an addition to, deletion
from, or modification of the contents of Covered Software; or
b. any new file in Source Code Form that contains any Covered Software.
1.11. “Patent Claims” of a Contributor
means any patent claim(s), including without limitation, method, process,
and apparatus claims, in any patent Licensable by such Contributor that
would be infringed, but for the grant of the License, by the making,
using, selling, offering for sale, having made, import, or transfer of
either its Contributions or its Contributor Version.
1.12. “Secondary License”
means either the GNU General Public License, Version 2.0, the GNU Lesser
General Public License, Version 2.1, the GNU Affero General Public
License, Version 3.0, or any later versions of those licenses.
1.13. “Source Code Form”
means the form of the work preferred for making modifications.
1.14. “You” (or “Your”)
means an individual or a legal entity exercising rights under this
License. For legal entities, “You” includes any entity that controls, is
controlled by, or is under common control with You. For purposes of this
definition, “control” means (a) the power, direct or indirect, to cause
the direction or management of such entity, whether by contract or
otherwise, or (b) ownership of more than fifty percent (50%) of the
outstanding shares or beneficial ownership of such entity.
2. License Grants and Conditions
2.1. Grants
Each Contributor hereby grants You a world-wide, royalty-free,
non-exclusive license:
a. under intellectual property rights (other than patent or trademark)
Licensable by such Contributor to use, reproduce, make available,
modify, display, perform, distribute, and otherwise exploit its
Contributions, either on an unmodified basis, with Modifications, or as
part of a Larger Work; and
b. under Patent Claims of such Contributor to make, use, sell, offer for
sale, have made, import, and otherwise transfer either its Contributions
or its Contributor Version.
2.2. Effective Date
The licenses granted in Section 2.1 with respect to any Contribution become
effective for each Contribution on the date the Contributor first distributes
such Contribution.
2.3. Limitations on Grant Scope
The licenses granted in this Section 2 are the only rights granted under this
License. No additional rights or licenses will be implied from the distribution
or licensing of Covered Software under this License. Notwithstanding Section
2.1(b) above, no patent license is granted by a Contributor:
a. for any code that a Contributor has removed from Covered Software; or
b. for infringements caused by: (i) Your and any other third party’s
modifications of Covered Software, or (ii) the combination of its
Contributions with other software (except as part of its Contributor
Version); or
c. under Patent Claims infringed by Covered Software in the absence of its
Contributions.
This License does not grant any rights in the trademarks, service marks, or
logos of any Contributor (except as may be necessary to comply with the
notice requirements in Section 3.4).
2.4. Subsequent Licenses
No Contributor makes additional grants as a result of Your choice to
distribute the Covered Software under a subsequent version of this License
(see Section 10.2) or under the terms of a Secondary License (if permitted
under the terms of Section 3.3).
2.5. Representation
Each Contributor represents that the Contributor believes its Contributions
are its original creation(s) or it has sufficient rights to grant the
rights to its Contributions conveyed by this License.
2.6. Fair Use
This License is not intended to limit any rights You have under applicable
copyright doctrines of fair use, fair dealing, or other equivalents.
2.7. Conditions
Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted in
Section 2.1.
3. Responsibilities
3.1. Distribution of Source Form
All distribution of Covered Software in Source Code Form, including any
Modifications that You create or to which You contribute, must be under the
terms of this License. You must inform recipients that the Source Code Form
of the Covered Software is governed by the terms of this License, and how
they can obtain a copy of this License. You may not attempt to alter or
restrict the recipients’ rights in the Source Code Form.
3.2. Distribution of Executable Form
If You distribute Covered Software in Executable Form then:
a. such Covered Software must also be made available in Source Code Form,
as described in Section 3.1, and You must inform recipients of the
Executable Form how they can obtain a copy of such Source Code Form by
reasonable means in a timely manner, at a charge no more than the cost
of distribution to the recipient; and
b. You may distribute such Executable Form under the terms of this License,
or sublicense it under different terms, provided that the license for
the Executable Form does not attempt to limit or alter the recipients’
rights in the Source Code Form under this License.
3.3. Distribution of a Larger Work
You may create and distribute a Larger Work under terms of Your choice,
provided that You also comply with the requirements of this License for the
Covered Software. If the Larger Work is a combination of Covered Software
with a work governed by one or more Secondary Licenses, and the Covered
Software is not Incompatible With Secondary Licenses, this License permits
You to additionally distribute such Covered Software under the terms of
such Secondary License(s), so that the recipient of the Larger Work may, at
their option, further distribute the Covered Software under the terms of
either this License or such Secondary License(s).
3.4. Notices
You may not remove or alter the substance of any license notices (including
copyright notices, patent notices, disclaimers of warranty, or limitations
of liability) contained within the Source Code Form of the Covered
Software, except that You may alter any license notices to the extent
required to remedy known factual inaccuracies.
3.5. Application of Additional Terms
You may choose to offer, and to charge a fee for, warranty, support,
indemnity or liability obligations to one or more recipients of Covered
Software. However, You may do so only on Your own behalf, and not on behalf
of any Contributor. You must make it absolutely clear that any such
warranty, support, indemnity, or liability obligation is offered by You
alone, and You hereby agree to indemnify every Contributor for any
liability incurred by such Contributor as a result of warranty, support,
indemnity or liability terms You offer. You may include additional
disclaimers of warranty and limitations of liability specific to any
jurisdiction.
4. Inability to Comply Due to Statute or Regulation
If it is impossible for You to comply with any of the terms of this License
with respect to some or all of the Covered Software due to statute, judicial
order, or regulation then You must: (a) comply with the terms of this License
to the maximum extent possible; and (b) describe the limitations and the code
they affect. Such description must be placed in a text file included with all
distributions of the Covered Software under this License. Except to the
extent prohibited by statute or regulation, such description must be
sufficiently detailed for a recipient of ordinary skill to be able to
understand it.
5. Termination
5.1. The rights granted under this License will terminate automatically if You
fail to comply with any of its terms. However, if You become compliant,
then the rights granted under this License from a particular Contributor
are reinstated (a) provisionally, unless and until such Contributor
explicitly and finally terminates Your grants, and (b) on an ongoing basis,
if such Contributor fails to notify You of the non-compliance by some
reasonable means prior to 60 days after You have come back into compliance.
Moreover, Your grants from a particular Contributor are reinstated on an
ongoing basis if such Contributor notifies You of the non-compliance by
some reasonable means, this is the first time You have received notice of
non-compliance with this License from such Contributor, and You become
compliant prior to 30 days after Your receipt of the notice.
5.2. If You initiate litigation against any entity by asserting a patent
infringement claim (excluding declaratory judgment actions, counter-claims,
and cross-claims) alleging that a Contributor Version directly or
indirectly infringes any patent, then the rights granted to You by any and
all Contributors for the Covered Software under Section 2.1 of this License
shall terminate.
5.3. In the event of termination under Sections 5.1 or 5.2 above, all end user
license agreements (excluding distributors and resellers) which have been
validly granted by You or Your distributors under this License prior to
termination shall survive termination.
6. Disclaimer of Warranty
Covered Software is provided under this License on an “as is” basis, without
warranty of any kind, either expressed, implied, or statutory, including,
without limitation, warranties that the Covered Software is free of defects,
merchantable, fit for a particular purpose or non-infringing. The entire
risk as to the quality and performance of the Covered Software is with You.
Should any Covered Software prove defective in any respect, You (not any
Contributor) assume the cost of any necessary servicing, repair, or
correction. This disclaimer of warranty constitutes an essential part of this
License. No use of any Covered Software is authorized under this License
except under this disclaimer.
7. Limitation of Liability
Under no circumstances and under no legal theory, whether tort (including
negligence), contract, or otherwise, shall any Contributor, or anyone who
distributes Covered Software as permitted above, be liable to You for any
direct, indirect, special, incidental, or consequential damages of any
character including, without limitation, damages for lost profits, loss of
goodwill, work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses, even if such party shall have been
informed of the possibility of such damages. This limitation of liability
shall not apply to liability for death or personal injury resulting from such
party’s negligence to the extent applicable law prohibits such limitation.
Some jurisdictions do not allow the exclusion or limitation of incidental or
consequential damages, so this exclusion and limitation may not apply to You.
8. Litigation
Any litigation relating to this License may be brought only in the courts of
a jurisdiction where the defendant maintains its principal place of business
and such litigation shall be governed by laws of that jurisdiction, without
reference to its conflict-of-law provisions. Nothing in this Section shall
prevent a party’s ability to bring cross-claims or counter-claims.
9. Miscellaneous
This License represents the complete agreement concerning the subject matter
hereof. If any provision of this License is held to be unenforceable, such
provision shall be reformed only to the extent necessary to make it
enforceable. Any law or regulation which provides that the language of a
contract shall be construed against the drafter shall not be used to construe
this License against a Contributor.
10. Versions of the License
10.1. New Versions
Mozilla Foundation is the license steward. Except as provided in Section
10.3, no one other than the license steward has the right to modify or
publish new versions of this License. Each version will be given a
distinguishing version number.
10.2. Effect of New Versions
You may distribute the Covered Software under the terms of the version of
the License under which You originally received the Covered Software, or
under the terms of any subsequent version published by the license
steward.
10.3. Modified Versions
If you create software not governed by this License, and you want to
create a new license for such software, you may create and use a modified
version of this License if you rename the license and remove any
references to the name of the license steward (except to note that such
modified license differs from this License).
10.4. Distributing Source Code Form that is Incompatible With Secondary Licenses
If You choose to distribute Source Code Form that is Incompatible With
Secondary Licenses under the terms of this version of the License, the
notice described in Exhibit B of this License must be attached.
Exhibit A - Source Code Form License Notice
This Source Code Form is subject to the
terms of the Mozilla Public License, v.
2.0. If a copy of the MPL was not
distributed with this file, You can
obtain one at
http://mozilla.org/MPL/2.0/.
If it is not possible or desirable to put the notice in a particular file, then
You may include the notice in a location (such as a LICENSE file in a relevant
directory) where a recipient would be likely to look for such a notice.
You may add additional accurate notices of copyright ownership.
Exhibit B - “Incompatible With Secondary Licenses” Notice
This Source Code Form is “Incompatible
With Secondary Licenses”, as defined by
the Mozilla Public License, v. 2.0.

18
vendor/github.com/hashicorp/hcl/Makefile generated vendored Normal file
View File

@ -0,0 +1,18 @@
TEST?=./...
default: test
fmt: generate
go fmt ./...
test: generate
go get -t ./...
go test $(TEST) $(TESTARGS)
generate:
go generate ./...
updatedeps:
go get -u golang.org/x/tools/cmd/stringer
.PHONY: default generate test updatedeps

125
vendor/github.com/hashicorp/hcl/README.md generated vendored Normal file
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@ -0,0 +1,125 @@
# HCL
[![GoDoc](https://godoc.org/github.com/hashicorp/hcl?status.png)](https://godoc.org/github.com/hashicorp/hcl) [![Build Status](https://travis-ci.org/hashicorp/hcl.svg?branch=master)](https://travis-ci.org/hashicorp/hcl)
HCL (HashiCorp Configuration Language) is a configuration language built
by HashiCorp. The goal of HCL is to build a structured configuration language
that is both human and machine friendly for use with command-line tools, but
specifically targeted towards DevOps tools, servers, etc.
HCL is also fully JSON compatible. That is, JSON can be used as completely
valid input to a system expecting HCL. This helps makes systems
interoperable with other systems.
HCL is heavily inspired by
[libucl](https://github.com/vstakhov/libucl),
nginx configuration, and others similar.
## Why?
A common question when viewing HCL is to ask the question: why not
JSON, YAML, etc.?
Prior to HCL, the tools we built at [HashiCorp](http://www.hashicorp.com)
used a variety of configuration languages from full programming languages
such as Ruby to complete data structure languages such as JSON. What we
learned is that some people wanted human-friendly configuration languages
and some people wanted machine-friendly languages.
JSON fits a nice balance in this, but is fairly verbose and most
importantly doesn't support comments. With YAML, we found that beginners
had a really hard time determining what the actual structure was, and
ended up guessing more often than not whether to use a hyphen, colon, etc.
in order to represent some configuration key.
Full programming languages such as Ruby enable complex behavior
a configuration language shouldn't usually allow, and also forces
people to learn some set of Ruby.
Because of this, we decided to create our own configuration language
that is JSON-compatible. Our configuration language (HCL) is designed
to be written and modified by humans. The API for HCL allows JSON
as an input so that it is also machine-friendly (machines can generate
JSON instead of trying to generate HCL).
Our goal with HCL is not to alienate other configuration languages.
It is instead to provide HCL as a specialized language for our tools,
and JSON as the interoperability layer.
## Syntax
For a complete grammar, please see the parser itself. A high-level overview
of the syntax and grammar is listed here.
* Single line comments start with `#` or `//`
* Multi-line comments are wrapped in `/*` and `*/`. Nested block comments
are not allowed. A multi-line comment (also known as a block comment)
terminates at the first `*/` found.
* Values are assigned with the syntax `key = value` (whitespace doesn't
matter). The value can be any primitive: a string, number, boolean,
object, or list.
* Strings are double-quoted and can contain any UTF-8 characters.
Example: `"Hello, World"`
* Multi-line strings start with `<<EOF` at the end of a line, and end
with `EOF` on its own line ([here documents](https://en.wikipedia.org/wiki/Here_document)).
Any text may be used in place of `EOF`. Example:
```
<<FOO
hello
world
FOO
```
* Numbers are assumed to be base 10. If you prefix a number with 0x,
it is treated as a hexadecimal. If it is prefixed with 0, it is
treated as an octal. Numbers can be in scientific notation: "1e10".
* Boolean values: `true`, `false`
* Arrays can be made by wrapping it in `[]`. Example:
`["foo", "bar", 42]`. Arrays can contain primitives,
other arrays, and objects. As an alternative, lists
of objects can be created with repeated blocks, using
this structure:
```hcl
service {
key = "value"
}
service {
key = "value"
}
```
Objects and nested objects are created using the structure shown below:
```
variable "ami" {
description = "the AMI to use"
}
```
This would be equivalent to the following json:
``` json
{
"variable": {
"ami": {
"description": "the AMI to use"
}
}
}
```
## Thanks
Thanks to:
* [@vstakhov](https://github.com/vstakhov) - The original libucl parser
and syntax that HCL was based off of.
* [@fatih](https://github.com/fatih) - The rewritten HCL parser
in pure Go (no goyacc) and support for a printer.

19
vendor/github.com/hashicorp/hcl/appveyor.yml generated vendored Normal file
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@ -0,0 +1,19 @@
version: "build-{branch}-{build}"
image: Visual Studio 2015
clone_folder: c:\gopath\src\github.com\hashicorp\hcl
environment:
GOPATH: c:\gopath
init:
- git config --global core.autocrlf false
install:
- cmd: >-
echo %Path%
go version
go env
go get -t ./...
build_script:
- cmd: go test -v ./...

729
vendor/github.com/hashicorp/hcl/decoder.go generated vendored Normal file
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@ -0,0 +1,729 @@
package hcl
import (
"errors"
"fmt"
"reflect"
"sort"
"strconv"
"strings"
"github.com/hashicorp/hcl/hcl/ast"
"github.com/hashicorp/hcl/hcl/parser"
"github.com/hashicorp/hcl/hcl/token"
)
// This is the tag to use with structures to have settings for HCL
const tagName = "hcl"
var (
// nodeType holds a reference to the type of ast.Node
nodeType reflect.Type = findNodeType()
)
// Unmarshal accepts a byte slice as input and writes the
// data to the value pointed to by v.
func Unmarshal(bs []byte, v interface{}) error {
root, err := parse(bs)
if err != nil {
return err
}
return DecodeObject(v, root)
}
// Decode reads the given input and decodes it into the structure
// given by `out`.
func Decode(out interface{}, in string) error {
obj, err := Parse(in)
if err != nil {
return err
}
return DecodeObject(out, obj)
}
// DecodeObject is a lower-level version of Decode. It decodes a
// raw Object into the given output.
func DecodeObject(out interface{}, n ast.Node) error {
val := reflect.ValueOf(out)
if val.Kind() != reflect.Ptr {
return errors.New("result must be a pointer")
}
// If we have the file, we really decode the root node
if f, ok := n.(*ast.File); ok {
n = f.Node
}
var d decoder
return d.decode("root", n, val.Elem())
}
type decoder struct {
stack []reflect.Kind
}
func (d *decoder) decode(name string, node ast.Node, result reflect.Value) error {
k := result
// If we have an interface with a valid value, we use that
// for the check.
if result.Kind() == reflect.Interface {
elem := result.Elem()
if elem.IsValid() {
k = elem
}
}
// Push current onto stack unless it is an interface.
if k.Kind() != reflect.Interface {
d.stack = append(d.stack, k.Kind())
// Schedule a pop
defer func() {
d.stack = d.stack[:len(d.stack)-1]
}()
}
switch k.Kind() {
case reflect.Bool:
return d.decodeBool(name, node, result)
case reflect.Float32, reflect.Float64:
return d.decodeFloat(name, node, result)
case reflect.Int, reflect.Int32, reflect.Int64:
return d.decodeInt(name, node, result)
case reflect.Interface:
// When we see an interface, we make our own thing
return d.decodeInterface(name, node, result)
case reflect.Map:
return d.decodeMap(name, node, result)
case reflect.Ptr:
return d.decodePtr(name, node, result)
case reflect.Slice:
return d.decodeSlice(name, node, result)
case reflect.String:
return d.decodeString(name, node, result)
case reflect.Struct:
return d.decodeStruct(name, node, result)
default:
return &parser.PosError{
Pos: node.Pos(),
Err: fmt.Errorf("%s: unknown kind to decode into: %s", name, k.Kind()),
}
}
}
func (d *decoder) decodeBool(name string, node ast.Node, result reflect.Value) error {
switch n := node.(type) {
case *ast.LiteralType:
if n.Token.Type == token.BOOL {
v, err := strconv.ParseBool(n.Token.Text)
if err != nil {
return err
}
result.Set(reflect.ValueOf(v))
return nil
}
}
return &parser.PosError{
Pos: node.Pos(),
Err: fmt.Errorf("%s: unknown type %T", name, node),
}
}
func (d *decoder) decodeFloat(name string, node ast.Node, result reflect.Value) error {
switch n := node.(type) {
case *ast.LiteralType:
if n.Token.Type == token.FLOAT || n.Token.Type == token.NUMBER {
v, err := strconv.ParseFloat(n.Token.Text, 64)
if err != nil {
return err
}
result.Set(reflect.ValueOf(v).Convert(result.Type()))
return nil
}
}
return &parser.PosError{
Pos: node.Pos(),
Err: fmt.Errorf("%s: unknown type %T", name, node),
}
}
func (d *decoder) decodeInt(name string, node ast.Node, result reflect.Value) error {
switch n := node.(type) {
case *ast.LiteralType:
switch n.Token.Type {
case token.NUMBER:
v, err := strconv.ParseInt(n.Token.Text, 0, 0)
if err != nil {
return err
}
if result.Kind() == reflect.Interface {
result.Set(reflect.ValueOf(int(v)))
} else {
result.SetInt(v)
}
return nil
case token.STRING:
v, err := strconv.ParseInt(n.Token.Value().(string), 0, 0)
if err != nil {
return err
}
if result.Kind() == reflect.Interface {
result.Set(reflect.ValueOf(int(v)))
} else {
result.SetInt(v)
}
return nil
}
}
return &parser.PosError{
Pos: node.Pos(),
Err: fmt.Errorf("%s: unknown type %T", name, node),
}
}
func (d *decoder) decodeInterface(name string, node ast.Node, result reflect.Value) error {
// When we see an ast.Node, we retain the value to enable deferred decoding.
// Very useful in situations where we want to preserve ast.Node information
// like Pos
if result.Type() == nodeType && result.CanSet() {
result.Set(reflect.ValueOf(node))
return nil
}
var set reflect.Value
redecode := true
// For testing types, ObjectType should just be treated as a list. We
// set this to a temporary var because we want to pass in the real node.
testNode := node
if ot, ok := node.(*ast.ObjectType); ok {
testNode = ot.List
}
switch n := testNode.(type) {
case *ast.ObjectList:
// If we're at the root or we're directly within a slice, then we
// decode objects into map[string]interface{}, otherwise we decode
// them into lists.
if len(d.stack) == 0 || d.stack[len(d.stack)-1] == reflect.Slice {
var temp map[string]interface{}
tempVal := reflect.ValueOf(temp)
result := reflect.MakeMap(
reflect.MapOf(
reflect.TypeOf(""),
tempVal.Type().Elem()))
set = result
} else {
var temp []map[string]interface{}
tempVal := reflect.ValueOf(temp)
result := reflect.MakeSlice(
reflect.SliceOf(tempVal.Type().Elem()), 0, len(n.Items))
set = result
}
case *ast.ObjectType:
// If we're at the root or we're directly within a slice, then we
// decode objects into map[string]interface{}, otherwise we decode
// them into lists.
if len(d.stack) == 0 || d.stack[len(d.stack)-1] == reflect.Slice {
var temp map[string]interface{}
tempVal := reflect.ValueOf(temp)
result := reflect.MakeMap(
reflect.MapOf(
reflect.TypeOf(""),
tempVal.Type().Elem()))
set = result
} else {
var temp []map[string]interface{}
tempVal := reflect.ValueOf(temp)
result := reflect.MakeSlice(
reflect.SliceOf(tempVal.Type().Elem()), 0, 1)
set = result
}
case *ast.ListType:
var temp []interface{}
tempVal := reflect.ValueOf(temp)
result := reflect.MakeSlice(
reflect.SliceOf(tempVal.Type().Elem()), 0, 0)
set = result
case *ast.LiteralType:
switch n.Token.Type {
case token.BOOL:
var result bool
set = reflect.Indirect(reflect.New(reflect.TypeOf(result)))
case token.FLOAT:
var result float64
set = reflect.Indirect(reflect.New(reflect.TypeOf(result)))
case token.NUMBER:
var result int
set = reflect.Indirect(reflect.New(reflect.TypeOf(result)))
case token.STRING, token.HEREDOC:
set = reflect.Indirect(reflect.New(reflect.TypeOf("")))
default:
return &parser.PosError{
Pos: node.Pos(),
Err: fmt.Errorf("%s: cannot decode into interface: %T", name, node),
}
}
default:
return fmt.Errorf(
"%s: cannot decode into interface: %T",
name, node)
}
// Set the result to what its supposed to be, then reset
// result so we don't reflect into this method anymore.
result.Set(set)
if redecode {
// Revisit the node so that we can use the newly instantiated
// thing and populate it.
if err := d.decode(name, node, result); err != nil {
return err
}
}
return nil
}
func (d *decoder) decodeMap(name string, node ast.Node, result reflect.Value) error {
if item, ok := node.(*ast.ObjectItem); ok {
node = &ast.ObjectList{Items: []*ast.ObjectItem{item}}
}
if ot, ok := node.(*ast.ObjectType); ok {
node = ot.List
}
n, ok := node.(*ast.ObjectList)
if !ok {
return &parser.PosError{
Pos: node.Pos(),
Err: fmt.Errorf("%s: not an object type for map (%T)", name, node),
}
}
// If we have an interface, then we can address the interface,
// but not the slice itself, so get the element but set the interface
set := result
if result.Kind() == reflect.Interface {
result = result.Elem()
}
resultType := result.Type()
resultElemType := resultType.Elem()
resultKeyType := resultType.Key()
if resultKeyType.Kind() != reflect.String {
return &parser.PosError{
Pos: node.Pos(),
Err: fmt.Errorf("%s: map must have string keys", name),
}
}
// Make a map if it is nil
resultMap := result
if result.IsNil() {
resultMap = reflect.MakeMap(
reflect.MapOf(resultKeyType, resultElemType))
}
// Go through each element and decode it.
done := make(map[string]struct{})
for _, item := range n.Items {
if item.Val == nil {
continue
}
// github.com/hashicorp/terraform/issue/5740
if len(item.Keys) == 0 {
return &parser.PosError{
Pos: node.Pos(),
Err: fmt.Errorf("%s: map must have string keys", name),
}
}
// Get the key we're dealing with, which is the first item
keyStr := item.Keys[0].Token.Value().(string)
// If we've already processed this key, then ignore it
if _, ok := done[keyStr]; ok {
continue
}
// Determine the value. If we have more than one key, then we
// get the objectlist of only these keys.
itemVal := item.Val
if len(item.Keys) > 1 {
itemVal = n.Filter(keyStr)
done[keyStr] = struct{}{}
}
// Make the field name
fieldName := fmt.Sprintf("%s.%s", name, keyStr)
// Get the key/value as reflection values
key := reflect.ValueOf(keyStr)
val := reflect.Indirect(reflect.New(resultElemType))
// If we have a pre-existing value in the map, use that
oldVal := resultMap.MapIndex(key)
if oldVal.IsValid() {
val.Set(oldVal)
}
// Decode!
if err := d.decode(fieldName, itemVal, val); err != nil {
return err
}
// Set the value on the map
resultMap.SetMapIndex(key, val)
}
// Set the final map if we can
set.Set(resultMap)
return nil
}
func (d *decoder) decodePtr(name string, node ast.Node, result reflect.Value) error {
// Create an element of the concrete (non pointer) type and decode
// into that. Then set the value of the pointer to this type.
resultType := result.Type()
resultElemType := resultType.Elem()
val := reflect.New(resultElemType)
if err := d.decode(name, node, reflect.Indirect(val)); err != nil {
return err
}
result.Set(val)
return nil
}
func (d *decoder) decodeSlice(name string, node ast.Node, result reflect.Value) error {
// If we have an interface, then we can address the interface,
// but not the slice itself, so get the element but set the interface
set := result
if result.Kind() == reflect.Interface {
result = result.Elem()
}
// Create the slice if it isn't nil
resultType := result.Type()
resultElemType := resultType.Elem()
if result.IsNil() {
resultSliceType := reflect.SliceOf(resultElemType)
result = reflect.MakeSlice(
resultSliceType, 0, 0)
}
// Figure out the items we'll be copying into the slice
var items []ast.Node
switch n := node.(type) {
case *ast.ObjectList:
items = make([]ast.Node, len(n.Items))
for i, item := range n.Items {
items[i] = item
}
case *ast.ObjectType:
items = []ast.Node{n}
case *ast.ListType:
items = n.List
default:
return &parser.PosError{
Pos: node.Pos(),
Err: fmt.Errorf("unknown slice type: %T", node),
}
}
for i, item := range items {
fieldName := fmt.Sprintf("%s[%d]", name, i)
// Decode
val := reflect.Indirect(reflect.New(resultElemType))
// if item is an object that was decoded from ambiguous JSON and
// flattened, make sure it's expanded if it needs to decode into a
// defined structure.
item := expandObject(item, val)
if err := d.decode(fieldName, item, val); err != nil {
return err
}
// Append it onto the slice
result = reflect.Append(result, val)
}
set.Set(result)
return nil
}
// expandObject detects if an ambiguous JSON object was flattened to a List which
// should be decoded into a struct, and expands the ast to properly deocode.
func expandObject(node ast.Node, result reflect.Value) ast.Node {
item, ok := node.(*ast.ObjectItem)
if !ok {
return node
}
elemType := result.Type()
// our target type must be a struct
switch elemType.Kind() {
case reflect.Ptr:
switch elemType.Elem().Kind() {
case reflect.Struct:
//OK
default:
return node
}
case reflect.Struct:
//OK
default:
return node
}
// A list value will have a key and field name. If it had more fields,
// it wouldn't have been flattened.
if len(item.Keys) != 2 {
return node
}
keyToken := item.Keys[0].Token
item.Keys = item.Keys[1:]
// we need to un-flatten the ast enough to decode
newNode := &ast.ObjectItem{
Keys: []*ast.ObjectKey{
&ast.ObjectKey{
Token: keyToken,
},
},
Val: &ast.ObjectType{
List: &ast.ObjectList{
Items: []*ast.ObjectItem{item},
},
},
}
return newNode
}
func (d *decoder) decodeString(name string, node ast.Node, result reflect.Value) error {
switch n := node.(type) {
case *ast.LiteralType:
switch n.Token.Type {
case token.NUMBER:
result.Set(reflect.ValueOf(n.Token.Text).Convert(result.Type()))
return nil
case token.STRING, token.HEREDOC:
result.Set(reflect.ValueOf(n.Token.Value()).Convert(result.Type()))
return nil
}
}
return &parser.PosError{
Pos: node.Pos(),
Err: fmt.Errorf("%s: unknown type for string %T", name, node),
}
}
func (d *decoder) decodeStruct(name string, node ast.Node, result reflect.Value) error {
var item *ast.ObjectItem
if it, ok := node.(*ast.ObjectItem); ok {
item = it
node = it.Val
}
if ot, ok := node.(*ast.ObjectType); ok {
node = ot.List
}
// Handle the special case where the object itself is a literal. Previously
// the yacc parser would always ensure top-level elements were arrays. The new
// parser does not make the same guarantees, thus we need to convert any
// top-level literal elements into a list.
if _, ok := node.(*ast.LiteralType); ok && item != nil {
node = &ast.ObjectList{Items: []*ast.ObjectItem{item}}
}
list, ok := node.(*ast.ObjectList)
if !ok {
return &parser.PosError{
Pos: node.Pos(),
Err: fmt.Errorf("%s: not an object type for struct (%T)", name, node),
}
}
// This slice will keep track of all the structs we'll be decoding.
// There can be more than one struct if there are embedded structs
// that are squashed.
structs := make([]reflect.Value, 1, 5)
structs[0] = result
// Compile the list of all the fields that we're going to be decoding
// from all the structs.
type field struct {
field reflect.StructField
val reflect.Value
}
fields := []field{}
for len(structs) > 0 {
structVal := structs[0]
structs = structs[1:]
structType := structVal.Type()
for i := 0; i < structType.NumField(); i++ {
fieldType := structType.Field(i)
tagParts := strings.Split(fieldType.Tag.Get(tagName), ",")
// Ignore fields with tag name "-"
if tagParts[0] == "-" {
continue
}
if fieldType.Anonymous {
fieldKind := fieldType.Type.Kind()
if fieldKind != reflect.Struct {
return &parser.PosError{
Pos: node.Pos(),
Err: fmt.Errorf("%s: unsupported type to struct: %s",
fieldType.Name, fieldKind),
}
}
// We have an embedded field. We "squash" the fields down
// if specified in the tag.
squash := false
for _, tag := range tagParts[1:] {
if tag == "squash" {
squash = true
break
}
}
if squash {
structs = append(
structs, result.FieldByName(fieldType.Name))
continue
}
}
// Normal struct field, store it away
fields = append(fields, field{fieldType, structVal.Field(i)})
}
}
usedKeys := make(map[string]struct{})
decodedFields := make([]string, 0, len(fields))
decodedFieldsVal := make([]reflect.Value, 0)
unusedKeysVal := make([]reflect.Value, 0)
for _, f := range fields {
field, fieldValue := f.field, f.val
if !fieldValue.IsValid() {
// This should never happen
panic("field is not valid")
}
// If we can't set the field, then it is unexported or something,
// and we just continue onwards.
if !fieldValue.CanSet() {
continue
}
fieldName := field.Name
tagValue := field.Tag.Get(tagName)
tagParts := strings.SplitN(tagValue, ",", 2)
if len(tagParts) >= 2 {
switch tagParts[1] {
case "decodedFields":
decodedFieldsVal = append(decodedFieldsVal, fieldValue)
continue
case "key":
if item == nil {
return &parser.PosError{
Pos: node.Pos(),
Err: fmt.Errorf("%s: %s asked for 'key', impossible",
name, fieldName),
}
}
fieldValue.SetString(item.Keys[0].Token.Value().(string))
continue
case "unusedKeys":
unusedKeysVal = append(unusedKeysVal, fieldValue)
continue
}
}
if tagParts[0] != "" {
fieldName = tagParts[0]
}
// Determine the element we'll use to decode. If it is a single
// match (only object with the field), then we decode it exactly.
// If it is a prefix match, then we decode the matches.
filter := list.Filter(fieldName)
prefixMatches := filter.Children()
matches := filter.Elem()
if len(matches.Items) == 0 && len(prefixMatches.Items) == 0 {
continue
}
// Track the used key
usedKeys[fieldName] = struct{}{}
// Create the field name and decode. We range over the elements
// because we actually want the value.
fieldName = fmt.Sprintf("%s.%s", name, fieldName)
if len(prefixMatches.Items) > 0 {
if err := d.decode(fieldName, prefixMatches, fieldValue); err != nil {
return err
}
}
for _, match := range matches.Items {
var decodeNode ast.Node = match.Val
if ot, ok := decodeNode.(*ast.ObjectType); ok {
decodeNode = &ast.ObjectList{Items: ot.List.Items}
}
if err := d.decode(fieldName, decodeNode, fieldValue); err != nil {
return err
}
}
decodedFields = append(decodedFields, field.Name)
}
if len(decodedFieldsVal) > 0 {
// Sort it so that it is deterministic
sort.Strings(decodedFields)
for _, v := range decodedFieldsVal {
v.Set(reflect.ValueOf(decodedFields))
}
}
return nil
}
// findNodeType returns the type of ast.Node
func findNodeType() reflect.Type {
var nodeContainer struct {
Node ast.Node
}
value := reflect.ValueOf(nodeContainer).FieldByName("Node")
return value.Type()
}

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module github.com/hashicorp/hcl
require github.com/davecgh/go-spew v1.1.1

2
vendor/github.com/hashicorp/hcl/go.sum generated vendored Normal file
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@ -0,0 +1,2 @@
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=

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vendor/github.com/hashicorp/hcl/hcl.go generated vendored Normal file
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// Package hcl decodes HCL into usable Go structures.
//
// hcl input can come in either pure HCL format or JSON format.
// It can be parsed into an AST, and then decoded into a structure,
// or it can be decoded directly from a string into a structure.
//
// If you choose to parse HCL into a raw AST, the benefit is that you
// can write custom visitor implementations to implement custom
// semantic checks. By default, HCL does not perform any semantic
// checks.
package hcl

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vendor/github.com/hashicorp/hcl/hcl/ast/ast.go generated vendored Normal file
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// Package ast declares the types used to represent syntax trees for HCL
// (HashiCorp Configuration Language)
package ast
import (
"fmt"
"strings"
"github.com/hashicorp/hcl/hcl/token"
)
// Node is an element in the abstract syntax tree.
type Node interface {
node()
Pos() token.Pos
}
func (File) node() {}
func (ObjectList) node() {}
func (ObjectKey) node() {}
func (ObjectItem) node() {}
func (Comment) node() {}
func (CommentGroup) node() {}
func (ObjectType) node() {}
func (LiteralType) node() {}
func (ListType) node() {}
// File represents a single HCL file
type File struct {
Node Node // usually a *ObjectList
Comments []*CommentGroup // list of all comments in the source
}
func (f *File) Pos() token.Pos {
return f.Node.Pos()
}
// ObjectList represents a list of ObjectItems. An HCL file itself is an
// ObjectList.
type ObjectList struct {
Items []*ObjectItem
}
func (o *ObjectList) Add(item *ObjectItem) {
o.Items = append(o.Items, item)
}
// Filter filters out the objects with the given key list as a prefix.
//
// The returned list of objects contain ObjectItems where the keys have
// this prefix already stripped off. This might result in objects with
// zero-length key lists if they have no children.
//
// If no matches are found, an empty ObjectList (non-nil) is returned.
func (o *ObjectList) Filter(keys ...string) *ObjectList {
var result ObjectList
for _, item := range o.Items {
// If there aren't enough keys, then ignore this
if len(item.Keys) < len(keys) {
continue
}
match := true
for i, key := range item.Keys[:len(keys)] {
key := key.Token.Value().(string)
if key != keys[i] && !strings.EqualFold(key, keys[i]) {
match = false
break
}
}
if !match {
continue
}
// Strip off the prefix from the children
newItem := *item
newItem.Keys = newItem.Keys[len(keys):]
result.Add(&newItem)
}
return &result
}
// Children returns further nested objects (key length > 0) within this
// ObjectList. This should be used with Filter to get at child items.
func (o *ObjectList) Children() *ObjectList {
var result ObjectList
for _, item := range o.Items {
if len(item.Keys) > 0 {
result.Add(item)
}
}
return &result
}
// Elem returns items in the list that are direct element assignments
// (key length == 0). This should be used with Filter to get at elements.
func (o *ObjectList) Elem() *ObjectList {
var result ObjectList
for _, item := range o.Items {
if len(item.Keys) == 0 {
result.Add(item)
}
}
return &result
}
func (o *ObjectList) Pos() token.Pos {
// always returns the uninitiliazed position
return o.Items[0].Pos()
}
// ObjectItem represents a HCL Object Item. An item is represented with a key
// (or keys). It can be an assignment or an object (both normal and nested)
type ObjectItem struct {
// keys is only one length long if it's of type assignment. If it's a
// nested object it can be larger than one. In that case "assign" is
// invalid as there is no assignments for a nested object.
Keys []*ObjectKey
// assign contains the position of "=", if any
Assign token.Pos
// val is the item itself. It can be an object,list, number, bool or a
// string. If key length is larger than one, val can be only of type
// Object.
Val Node
LeadComment *CommentGroup // associated lead comment
LineComment *CommentGroup // associated line comment
}
func (o *ObjectItem) Pos() token.Pos {
// I'm not entirely sure what causes this, but removing this causes
// a test failure. We should investigate at some point.
if len(o.Keys) == 0 {
return token.Pos{}
}
return o.Keys[0].Pos()
}
// ObjectKeys are either an identifier or of type string.
type ObjectKey struct {
Token token.Token
}
func (o *ObjectKey) Pos() token.Pos {
return o.Token.Pos
}
// LiteralType represents a literal of basic type. Valid types are:
// token.NUMBER, token.FLOAT, token.BOOL and token.STRING
type LiteralType struct {
Token token.Token
// comment types, only used when in a list
LeadComment *CommentGroup
LineComment *CommentGroup
}
func (l *LiteralType) Pos() token.Pos {
return l.Token.Pos
}
// ListStatement represents a HCL List type
type ListType struct {
Lbrack token.Pos // position of "["
Rbrack token.Pos // position of "]"
List []Node // the elements in lexical order
}
func (l *ListType) Pos() token.Pos {
return l.Lbrack
}
func (l *ListType) Add(node Node) {
l.List = append(l.List, node)
}
// ObjectType represents a HCL Object Type
type ObjectType struct {
Lbrace token.Pos // position of "{"
Rbrace token.Pos // position of "}"
List *ObjectList // the nodes in lexical order
}
func (o *ObjectType) Pos() token.Pos {
return o.Lbrace
}
// Comment node represents a single //, # style or /*- style commment
type Comment struct {
Start token.Pos // position of / or #
Text string
}
func (c *Comment) Pos() token.Pos {
return c.Start
}
// CommentGroup node represents a sequence of comments with no other tokens and
// no empty lines between.
type CommentGroup struct {
List []*Comment // len(List) > 0
}
func (c *CommentGroup) Pos() token.Pos {
return c.List[0].Pos()
}
//-------------------------------------------------------------------
// GoStringer
//-------------------------------------------------------------------
func (o *ObjectKey) GoString() string { return fmt.Sprintf("*%#v", *o) }
func (o *ObjectList) GoString() string { return fmt.Sprintf("*%#v", *o) }

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vendor/github.com/hashicorp/hcl/hcl/ast/walk.go generated vendored Normal file
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package ast
import "fmt"
// WalkFunc describes a function to be called for each node during a Walk. The
// returned node can be used to rewrite the AST. Walking stops the returned
// bool is false.
type WalkFunc func(Node) (Node, bool)
// Walk traverses an AST in depth-first order: It starts by calling fn(node);
// node must not be nil. If fn returns true, Walk invokes fn recursively for
// each of the non-nil children of node, followed by a call of fn(nil). The
// returned node of fn can be used to rewrite the passed node to fn.
func Walk(node Node, fn WalkFunc) Node {
rewritten, ok := fn(node)
if !ok {
return rewritten
}
switch n := node.(type) {
case *File:
n.Node = Walk(n.Node, fn)
case *ObjectList:
for i, item := range n.Items {
n.Items[i] = Walk(item, fn).(*ObjectItem)
}
case *ObjectKey:
// nothing to do
case *ObjectItem:
for i, k := range n.Keys {
n.Keys[i] = Walk(k, fn).(*ObjectKey)
}
if n.Val != nil {
n.Val = Walk(n.Val, fn)
}
case *LiteralType:
// nothing to do
case *ListType:
for i, l := range n.List {
n.List[i] = Walk(l, fn)
}
case *ObjectType:
n.List = Walk(n.List, fn).(*ObjectList)
default:
// should we panic here?
fmt.Printf("unknown type: %T\n", n)
}
fn(nil)
return rewritten
}

17
vendor/github.com/hashicorp/hcl/hcl/parser/error.go generated vendored Normal file
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@ -0,0 +1,17 @@
package parser
import (
"fmt"
"github.com/hashicorp/hcl/hcl/token"
)
// PosError is a parse error that contains a position.
type PosError struct {
Pos token.Pos
Err error
}
func (e *PosError) Error() string {
return fmt.Sprintf("At %s: %s", e.Pos, e.Err)
}

532
vendor/github.com/hashicorp/hcl/hcl/parser/parser.go generated vendored Normal file
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@ -0,0 +1,532 @@
// Package parser implements a parser for HCL (HashiCorp Configuration
// Language)
package parser
import (
"bytes"
"errors"
"fmt"
"strings"
"github.com/hashicorp/hcl/hcl/ast"
"github.com/hashicorp/hcl/hcl/scanner"
"github.com/hashicorp/hcl/hcl/token"
)
type Parser struct {
sc *scanner.Scanner
// Last read token
tok token.Token
commaPrev token.Token
comments []*ast.CommentGroup
leadComment *ast.CommentGroup // last lead comment
lineComment *ast.CommentGroup // last line comment
enableTrace bool
indent int
n int // buffer size (max = 1)
}
func newParser(src []byte) *Parser {
return &Parser{
sc: scanner.New(src),
}
}
// Parse returns the fully parsed source and returns the abstract syntax tree.
func Parse(src []byte) (*ast.File, error) {
// normalize all line endings
// since the scanner and output only work with "\n" line endings, we may
// end up with dangling "\r" characters in the parsed data.
src = bytes.Replace(src, []byte("\r\n"), []byte("\n"), -1)
p := newParser(src)
return p.Parse()
}
var errEofToken = errors.New("EOF token found")
// Parse returns the fully parsed source and returns the abstract syntax tree.
func (p *Parser) Parse() (*ast.File, error) {
f := &ast.File{}
var err, scerr error
p.sc.Error = func(pos token.Pos, msg string) {
scerr = &PosError{Pos: pos, Err: errors.New(msg)}
}
f.Node, err = p.objectList(false)
if scerr != nil {
return nil, scerr
}
if err != nil {
return nil, err
}
f.Comments = p.comments
return f, nil
}
// objectList parses a list of items within an object (generally k/v pairs).
// The parameter" obj" tells this whether to we are within an object (braces:
// '{', '}') or just at the top level. If we're within an object, we end
// at an RBRACE.
func (p *Parser) objectList(obj bool) (*ast.ObjectList, error) {
defer un(trace(p, "ParseObjectList"))
node := &ast.ObjectList{}
for {
if obj {
tok := p.scan()
p.unscan()
if tok.Type == token.RBRACE {
break
}
}
n, err := p.objectItem()
if err == errEofToken {
break // we are finished
}
// we don't return a nil node, because might want to use already
// collected items.
if err != nil {
return node, err
}
node.Add(n)
// object lists can be optionally comma-delimited e.g. when a list of maps
// is being expressed, so a comma is allowed here - it's simply consumed
tok := p.scan()
if tok.Type != token.COMMA {
p.unscan()
}
}
return node, nil
}
func (p *Parser) consumeComment() (comment *ast.Comment, endline int) {
endline = p.tok.Pos.Line
// count the endline if it's multiline comment, ie starting with /*
if len(p.tok.Text) > 1 && p.tok.Text[1] == '*' {
// don't use range here - no need to decode Unicode code points
for i := 0; i < len(p.tok.Text); i++ {
if p.tok.Text[i] == '\n' {
endline++
}
}
}
comment = &ast.Comment{Start: p.tok.Pos, Text: p.tok.Text}
p.tok = p.sc.Scan()
return
}
func (p *Parser) consumeCommentGroup(n int) (comments *ast.CommentGroup, endline int) {
var list []*ast.Comment
endline = p.tok.Pos.Line
for p.tok.Type == token.COMMENT && p.tok.Pos.Line <= endline+n {
var comment *ast.Comment
comment, endline = p.consumeComment()
list = append(list, comment)
}
// add comment group to the comments list
comments = &ast.CommentGroup{List: list}
p.comments = append(p.comments, comments)
return
}
// objectItem parses a single object item
func (p *Parser) objectItem() (*ast.ObjectItem, error) {
defer un(trace(p, "ParseObjectItem"))
keys, err := p.objectKey()
if len(keys) > 0 && err == errEofToken {
// We ignore eof token here since it is an error if we didn't
// receive a value (but we did receive a key) for the item.
err = nil
}
if len(keys) > 0 && err != nil && p.tok.Type == token.RBRACE {
// This is a strange boolean statement, but what it means is:
// We have keys with no value, and we're likely in an object
// (since RBrace ends an object). For this, we set err to nil so
// we continue and get the error below of having the wrong value
// type.
err = nil
// Reset the token type so we don't think it completed fine. See
// objectType which uses p.tok.Type to check if we're done with
// the object.
p.tok.Type = token.EOF
}
if err != nil {
return nil, err
}
o := &ast.ObjectItem{
Keys: keys,
}
if p.leadComment != nil {
o.LeadComment = p.leadComment
p.leadComment = nil
}
switch p.tok.Type {
case token.ASSIGN:
o.Assign = p.tok.Pos
o.Val, err = p.object()
if err != nil {
return nil, err
}
case token.LBRACE:
o.Val, err = p.objectType()
if err != nil {
return nil, err
}
default:
keyStr := make([]string, 0, len(keys))
for _, k := range keys {
keyStr = append(keyStr, k.Token.Text)
}
return nil, &PosError{
Pos: p.tok.Pos,
Err: fmt.Errorf(
"key '%s' expected start of object ('{') or assignment ('=')",
strings.Join(keyStr, " ")),
}
}
// key=#comment
// val
if p.lineComment != nil {
o.LineComment, p.lineComment = p.lineComment, nil
}
// do a look-ahead for line comment
p.scan()
if len(keys) > 0 && o.Val.Pos().Line == keys[0].Pos().Line && p.lineComment != nil {
o.LineComment = p.lineComment
p.lineComment = nil
}
p.unscan()
return o, nil
}
// objectKey parses an object key and returns a ObjectKey AST
func (p *Parser) objectKey() ([]*ast.ObjectKey, error) {
keyCount := 0
keys := make([]*ast.ObjectKey, 0)
for {
tok := p.scan()
switch tok.Type {
case token.EOF:
// It is very important to also return the keys here as well as
// the error. This is because we need to be able to tell if we
// did parse keys prior to finding the EOF, or if we just found
// a bare EOF.
return keys, errEofToken
case token.ASSIGN:
// assignment or object only, but not nested objects. this is not
// allowed: `foo bar = {}`
if keyCount > 1 {
return nil, &PosError{
Pos: p.tok.Pos,
Err: fmt.Errorf("nested object expected: LBRACE got: %s", p.tok.Type),
}
}
if keyCount == 0 {
return nil, &PosError{
Pos: p.tok.Pos,
Err: errors.New("no object keys found!"),
}
}
return keys, nil
case token.LBRACE:
var err error
// If we have no keys, then it is a syntax error. i.e. {{}} is not
// allowed.
if len(keys) == 0 {
err = &PosError{
Pos: p.tok.Pos,
Err: fmt.Errorf("expected: IDENT | STRING got: %s", p.tok.Type),
}
}
// object
return keys, err
case token.IDENT, token.STRING:
keyCount++
keys = append(keys, &ast.ObjectKey{Token: p.tok})
case token.ILLEGAL:
return keys, &PosError{
Pos: p.tok.Pos,
Err: fmt.Errorf("illegal character"),
}
default:
return keys, &PosError{
Pos: p.tok.Pos,
Err: fmt.Errorf("expected: IDENT | STRING | ASSIGN | LBRACE got: %s", p.tok.Type),
}
}
}
}
// object parses any type of object, such as number, bool, string, object or
// list.
func (p *Parser) object() (ast.Node, error) {
defer un(trace(p, "ParseType"))
tok := p.scan()
switch tok.Type {
case token.NUMBER, token.FLOAT, token.BOOL, token.STRING, token.HEREDOC:
return p.literalType()
case token.LBRACE:
return p.objectType()
case token.LBRACK:
return p.listType()
case token.COMMENT:
// implement comment
case token.EOF:
return nil, errEofToken
}
return nil, &PosError{
Pos: tok.Pos,
Err: fmt.Errorf("Unknown token: %+v", tok),
}
}
// objectType parses an object type and returns a ObjectType AST
func (p *Parser) objectType() (*ast.ObjectType, error) {
defer un(trace(p, "ParseObjectType"))
// we assume that the currently scanned token is a LBRACE
o := &ast.ObjectType{
Lbrace: p.tok.Pos,
}
l, err := p.objectList(true)
// if we hit RBRACE, we are good to go (means we parsed all Items), if it's
// not a RBRACE, it's an syntax error and we just return it.
if err != nil && p.tok.Type != token.RBRACE {
return nil, err
}
// No error, scan and expect the ending to be a brace
if tok := p.scan(); tok.Type != token.RBRACE {
return nil, &PosError{
Pos: tok.Pos,
Err: fmt.Errorf("object expected closing RBRACE got: %s", tok.Type),
}
}
o.List = l
o.Rbrace = p.tok.Pos // advanced via parseObjectList
return o, nil
}
// listType parses a list type and returns a ListType AST
func (p *Parser) listType() (*ast.ListType, error) {
defer un(trace(p, "ParseListType"))
// we assume that the currently scanned token is a LBRACK
l := &ast.ListType{
Lbrack: p.tok.Pos,
}
needComma := false
for {
tok := p.scan()
if needComma {
switch tok.Type {
case token.COMMA, token.RBRACK:
default:
return nil, &PosError{
Pos: tok.Pos,
Err: fmt.Errorf(
"error parsing list, expected comma or list end, got: %s",
tok.Type),
}
}
}
switch tok.Type {
case token.BOOL, token.NUMBER, token.FLOAT, token.STRING, token.HEREDOC:
node, err := p.literalType()
if err != nil {
return nil, err
}
// If there is a lead comment, apply it
if p.leadComment != nil {
node.LeadComment = p.leadComment
p.leadComment = nil
}
l.Add(node)
needComma = true
case token.COMMA:
// get next list item or we are at the end
// do a look-ahead for line comment
p.scan()
if p.lineComment != nil && len(l.List) > 0 {
lit, ok := l.List[len(l.List)-1].(*ast.LiteralType)
if ok {
lit.LineComment = p.lineComment
l.List[len(l.List)-1] = lit
p.lineComment = nil
}
}
p.unscan()
needComma = false
continue
case token.LBRACE:
// Looks like a nested object, so parse it out
node, err := p.objectType()
if err != nil {
return nil, &PosError{
Pos: tok.Pos,
Err: fmt.Errorf(
"error while trying to parse object within list: %s", err),
}
}
l.Add(node)
needComma = true
case token.LBRACK:
node, err := p.listType()
if err != nil {
return nil, &PosError{
Pos: tok.Pos,
Err: fmt.Errorf(
"error while trying to parse list within list: %s", err),
}
}
l.Add(node)
case token.RBRACK:
// finished
l.Rbrack = p.tok.Pos
return l, nil
default:
return nil, &PosError{
Pos: tok.Pos,
Err: fmt.Errorf("unexpected token while parsing list: %s", tok.Type),
}
}
}
}
// literalType parses a literal type and returns a LiteralType AST
func (p *Parser) literalType() (*ast.LiteralType, error) {
defer un(trace(p, "ParseLiteral"))
return &ast.LiteralType{
Token: p.tok,
}, nil
}
// scan returns the next token from the underlying scanner. If a token has
// been unscanned then read that instead. In the process, it collects any
// comment groups encountered, and remembers the last lead and line comments.
func (p *Parser) scan() token.Token {
// If we have a token on the buffer, then return it.
if p.n != 0 {
p.n = 0
return p.tok
}
// Otherwise read the next token from the scanner and Save it to the buffer
// in case we unscan later.
prev := p.tok
p.tok = p.sc.Scan()
if p.tok.Type == token.COMMENT {
var comment *ast.CommentGroup
var endline int
// fmt.Printf("p.tok.Pos.Line = %+v prev: %d endline %d \n",
// p.tok.Pos.Line, prev.Pos.Line, endline)
if p.tok.Pos.Line == prev.Pos.Line {
// The comment is on same line as the previous token; it
// cannot be a lead comment but may be a line comment.
comment, endline = p.consumeCommentGroup(0)
if p.tok.Pos.Line != endline {
// The next token is on a different line, thus
// the last comment group is a line comment.
p.lineComment = comment
}
}
// consume successor comments, if any
endline = -1
for p.tok.Type == token.COMMENT {
comment, endline = p.consumeCommentGroup(1)
}
if endline+1 == p.tok.Pos.Line && p.tok.Type != token.RBRACE {
switch p.tok.Type {
case token.RBRACE, token.RBRACK:
// Do not count for these cases
default:
// The next token is following on the line immediately after the
// comment group, thus the last comment group is a lead comment.
p.leadComment = comment
}
}
}
return p.tok
}
// unscan pushes the previously read token back onto the buffer.
func (p *Parser) unscan() {
p.n = 1
}
// ----------------------------------------------------------------------------
// Parsing support
func (p *Parser) printTrace(a ...interface{}) {
if !p.enableTrace {
return
}
const dots = ". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "
const n = len(dots)
fmt.Printf("%5d:%3d: ", p.tok.Pos.Line, p.tok.Pos.Column)
i := 2 * p.indent
for i > n {
fmt.Print(dots)
i -= n
}
// i <= n
fmt.Print(dots[0:i])
fmt.Println(a...)
}
func trace(p *Parser, msg string) *Parser {
p.printTrace(msg, "(")
p.indent++
return p
}
// Usage pattern: defer un(trace(p, "..."))
func un(p *Parser) {
p.indent--
p.printTrace(")")
}

652
vendor/github.com/hashicorp/hcl/hcl/scanner/scanner.go generated vendored Normal file
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// Package scanner implements a scanner for HCL (HashiCorp Configuration
// Language) source text.
package scanner
import (
"bytes"
"fmt"
"os"
"regexp"
"unicode"
"unicode/utf8"
"github.com/hashicorp/hcl/hcl/token"
)
// eof represents a marker rune for the end of the reader.
const eof = rune(0)
// Scanner defines a lexical scanner
type Scanner struct {
buf *bytes.Buffer // Source buffer for advancing and scanning
src []byte // Source buffer for immutable access
// Source Position
srcPos token.Pos // current position
prevPos token.Pos // previous position, used for peek() method
lastCharLen int // length of last character in bytes
lastLineLen int // length of last line in characters (for correct column reporting)
tokStart int // token text start position
tokEnd int // token text end position
// Error is called for each error encountered. If no Error
// function is set, the error is reported to os.Stderr.
Error func(pos token.Pos, msg string)
// ErrorCount is incremented by one for each error encountered.
ErrorCount int
// tokPos is the start position of most recently scanned token; set by
// Scan. The Filename field is always left untouched by the Scanner. If
// an error is reported (via Error) and Position is invalid, the scanner is
// not inside a token.
tokPos token.Pos
}
// New creates and initializes a new instance of Scanner using src as
// its source content.
func New(src []byte) *Scanner {
// even though we accept a src, we read from a io.Reader compatible type
// (*bytes.Buffer). So in the future we might easily change it to streaming
// read.
b := bytes.NewBuffer(src)
s := &Scanner{
buf: b,
src: src,
}
// srcPosition always starts with 1
s.srcPos.Line = 1
return s
}
// next reads the next rune from the bufferred reader. Returns the rune(0) if
// an error occurs (or io.EOF is returned).
func (s *Scanner) next() rune {
ch, size, err := s.buf.ReadRune()
if err != nil {
// advance for error reporting
s.srcPos.Column++
s.srcPos.Offset += size
s.lastCharLen = size
return eof
}
// remember last position
s.prevPos = s.srcPos
s.srcPos.Column++
s.lastCharLen = size
s.srcPos.Offset += size
if ch == utf8.RuneError && size == 1 {
s.err("illegal UTF-8 encoding")
return ch
}
if ch == '\n' {
s.srcPos.Line++
s.lastLineLen = s.srcPos.Column
s.srcPos.Column = 0
}
if ch == '\x00' {
s.err("unexpected null character (0x00)")
return eof
}
if ch == '\uE123' {
s.err("unicode code point U+E123 reserved for internal use")
return utf8.RuneError
}
// debug
// fmt.Printf("ch: %q, offset:column: %d:%d\n", ch, s.srcPos.Offset, s.srcPos.Column)
return ch
}
// unread unreads the previous read Rune and updates the source position
func (s *Scanner) unread() {
if err := s.buf.UnreadRune(); err != nil {
panic(err) // this is user fault, we should catch it
}
s.srcPos = s.prevPos // put back last position
}
// peek returns the next rune without advancing the reader.
func (s *Scanner) peek() rune {
peek, _, err := s.buf.ReadRune()
if err != nil {
return eof
}
s.buf.UnreadRune()
return peek
}
// Scan scans the next token and returns the token.
func (s *Scanner) Scan() token.Token {
ch := s.next()
// skip white space
for isWhitespace(ch) {
ch = s.next()
}
var tok token.Type
// token text markings
s.tokStart = s.srcPos.Offset - s.lastCharLen
// token position, initial next() is moving the offset by one(size of rune
// actually), though we are interested with the starting point
s.tokPos.Offset = s.srcPos.Offset - s.lastCharLen
if s.srcPos.Column > 0 {
// common case: last character was not a '\n'
s.tokPos.Line = s.srcPos.Line
s.tokPos.Column = s.srcPos.Column
} else {
// last character was a '\n'
// (we cannot be at the beginning of the source
// since we have called next() at least once)
s.tokPos.Line = s.srcPos.Line - 1
s.tokPos.Column = s.lastLineLen
}
switch {
case isLetter(ch):
tok = token.IDENT
lit := s.scanIdentifier()
if lit == "true" || lit == "false" {
tok = token.BOOL
}
case isDecimal(ch):
tok = s.scanNumber(ch)
default:
switch ch {
case eof:
tok = token.EOF
case '"':
tok = token.STRING
s.scanString()
case '#', '/':
tok = token.COMMENT
s.scanComment(ch)
case '.':
tok = token.PERIOD
ch = s.peek()
if isDecimal(ch) {
tok = token.FLOAT
ch = s.scanMantissa(ch)
ch = s.scanExponent(ch)
}
case '<':
tok = token.HEREDOC
s.scanHeredoc()
case '[':
tok = token.LBRACK
case ']':
tok = token.RBRACK
case '{':
tok = token.LBRACE
case '}':
tok = token.RBRACE
case ',':
tok = token.COMMA
case '=':
tok = token.ASSIGN
case '+':
tok = token.ADD
case '-':
if isDecimal(s.peek()) {
ch := s.next()
tok = s.scanNumber(ch)
} else {
tok = token.SUB
}
default:
s.err("illegal char")
}
}
// finish token ending
s.tokEnd = s.srcPos.Offset
// create token literal
var tokenText string
if s.tokStart >= 0 {
tokenText = string(s.src[s.tokStart:s.tokEnd])
}
s.tokStart = s.tokEnd // ensure idempotency of tokenText() call
return token.Token{
Type: tok,
Pos: s.tokPos,
Text: tokenText,
}
}
func (s *Scanner) scanComment(ch rune) {
// single line comments
if ch == '#' || (ch == '/' && s.peek() != '*') {
if ch == '/' && s.peek() != '/' {
s.err("expected '/' for comment")
return
}
ch = s.next()
for ch != '\n' && ch >= 0 && ch != eof {
ch = s.next()
}
if ch != eof && ch >= 0 {
s.unread()
}
return
}
// be sure we get the character after /* This allows us to find comment's
// that are not erminated
if ch == '/' {
s.next()
ch = s.next() // read character after "/*"
}
// look for /* - style comments
for {
if ch < 0 || ch == eof {
s.err("comment not terminated")
break
}
ch0 := ch
ch = s.next()
if ch0 == '*' && ch == '/' {
break
}
}
}
// scanNumber scans a HCL number definition starting with the given rune
func (s *Scanner) scanNumber(ch rune) token.Type {
if ch == '0' {
// check for hexadecimal, octal or float
ch = s.next()
if ch == 'x' || ch == 'X' {
// hexadecimal
ch = s.next()
found := false
for isHexadecimal(ch) {
ch = s.next()
found = true
}
if !found {
s.err("illegal hexadecimal number")
}
if ch != eof {
s.unread()
}
return token.NUMBER
}
// now it's either something like: 0421(octal) or 0.1231(float)
illegalOctal := false
for isDecimal(ch) {
ch = s.next()
if ch == '8' || ch == '9' {
// this is just a possibility. For example 0159 is illegal, but
// 0159.23 is valid. So we mark a possible illegal octal. If
// the next character is not a period, we'll print the error.
illegalOctal = true
}
}
if ch == 'e' || ch == 'E' {
ch = s.scanExponent(ch)
return token.FLOAT
}
if ch == '.' {
ch = s.scanFraction(ch)
if ch == 'e' || ch == 'E' {
ch = s.next()
ch = s.scanExponent(ch)
}
return token.FLOAT
}
if illegalOctal {
s.err("illegal octal number")
}
if ch != eof {
s.unread()
}
return token.NUMBER
}
s.scanMantissa(ch)
ch = s.next() // seek forward
if ch == 'e' || ch == 'E' {
ch = s.scanExponent(ch)
return token.FLOAT
}
if ch == '.' {
ch = s.scanFraction(ch)
if ch == 'e' || ch == 'E' {
ch = s.next()
ch = s.scanExponent(ch)
}
return token.FLOAT
}
if ch != eof {
s.unread()
}
return token.NUMBER
}
// scanMantissa scans the mantissa beginning from the rune. It returns the next
// non decimal rune. It's used to determine wheter it's a fraction or exponent.
func (s *Scanner) scanMantissa(ch rune) rune {
scanned := false
for isDecimal(ch) {
ch = s.next()
scanned = true
}
if scanned && ch != eof {
s.unread()
}
return ch
}
// scanFraction scans the fraction after the '.' rune
func (s *Scanner) scanFraction(ch rune) rune {
if ch == '.' {
ch = s.peek() // we peek just to see if we can move forward
ch = s.scanMantissa(ch)
}
return ch
}
// scanExponent scans the remaining parts of an exponent after the 'e' or 'E'
// rune.
func (s *Scanner) scanExponent(ch rune) rune {
if ch == 'e' || ch == 'E' {
ch = s.next()
if ch == '-' || ch == '+' {
ch = s.next()
}
ch = s.scanMantissa(ch)
}
return ch
}
// scanHeredoc scans a heredoc string
func (s *Scanner) scanHeredoc() {
// Scan the second '<' in example: '<<EOF'
if s.next() != '<' {
s.err("heredoc expected second '<', didn't see it")
return
}
// Get the original offset so we can read just the heredoc ident
offs := s.srcPos.Offset
// Scan the identifier
ch := s.next()
// Indented heredoc syntax
if ch == '-' {
ch = s.next()
}
for isLetter(ch) || isDigit(ch) {
ch = s.next()
}
// If we reached an EOF then that is not good
if ch == eof {
s.err("heredoc not terminated")
return
}
// Ignore the '\r' in Windows line endings
if ch == '\r' {
if s.peek() == '\n' {
ch = s.next()
}
}
// If we didn't reach a newline then that is also not good
if ch != '\n' {
s.err("invalid characters in heredoc anchor")
return
}
// Read the identifier
identBytes := s.src[offs : s.srcPos.Offset-s.lastCharLen]
if len(identBytes) == 0 || (len(identBytes) == 1 && identBytes[0] == '-') {
s.err("zero-length heredoc anchor")
return
}
var identRegexp *regexp.Regexp
if identBytes[0] == '-' {
identRegexp = regexp.MustCompile(fmt.Sprintf(`^[[:space:]]*%s\r*\z`, identBytes[1:]))
} else {
identRegexp = regexp.MustCompile(fmt.Sprintf(`^[[:space:]]*%s\r*\z`, identBytes))
}
// Read the actual string value
lineStart := s.srcPos.Offset
for {
ch := s.next()
// Special newline handling.
if ch == '\n' {
// Math is fast, so we first compare the byte counts to see if we have a chance
// of seeing the same identifier - if the length is less than the number of bytes
// in the identifier, this cannot be a valid terminator.
lineBytesLen := s.srcPos.Offset - s.lastCharLen - lineStart
if lineBytesLen >= len(identBytes) && identRegexp.Match(s.src[lineStart:s.srcPos.Offset-s.lastCharLen]) {
break
}
// Not an anchor match, record the start of a new line
lineStart = s.srcPos.Offset
}
if ch == eof {
s.err("heredoc not terminated")
return
}
}
return
}
// scanString scans a quoted string
func (s *Scanner) scanString() {
braces := 0
for {
// '"' opening already consumed
// read character after quote
ch := s.next()
if (ch == '\n' && braces == 0) || ch < 0 || ch == eof {
s.err("literal not terminated")
return
}
if ch == '"' && braces == 0 {
break
}
// If we're going into a ${} then we can ignore quotes for awhile
if braces == 0 && ch == '$' && s.peek() == '{' {
braces++
s.next()
} else if braces > 0 && ch == '{' {
braces++
}
if braces > 0 && ch == '}' {
braces--
}
if ch == '\\' {
s.scanEscape()
}
}
return
}
// scanEscape scans an escape sequence
func (s *Scanner) scanEscape() rune {
// http://en.cppreference.com/w/cpp/language/escape
ch := s.next() // read character after '/'
switch ch {
case 'a', 'b', 'f', 'n', 'r', 't', 'v', '\\', '"':
// nothing to do
case '0', '1', '2', '3', '4', '5', '6', '7':
// octal notation
ch = s.scanDigits(ch, 8, 3)
case 'x':
// hexademical notation
ch = s.scanDigits(s.next(), 16, 2)
case 'u':
// universal character name
ch = s.scanDigits(s.next(), 16, 4)
case 'U':
// universal character name
ch = s.scanDigits(s.next(), 16, 8)
default:
s.err("illegal char escape")
}
return ch
}
// scanDigits scans a rune with the given base for n times. For example an
// octal notation \184 would yield in scanDigits(ch, 8, 3)
func (s *Scanner) scanDigits(ch rune, base, n int) rune {
start := n
for n > 0 && digitVal(ch) < base {
ch = s.next()
if ch == eof {
// If we see an EOF, we halt any more scanning of digits
// immediately.
break
}
n--
}
if n > 0 {
s.err("illegal char escape")
}
if n != start && ch != eof {
// we scanned all digits, put the last non digit char back,
// only if we read anything at all
s.unread()
}
return ch
}
// scanIdentifier scans an identifier and returns the literal string
func (s *Scanner) scanIdentifier() string {
offs := s.srcPos.Offset - s.lastCharLen
ch := s.next()
for isLetter(ch) || isDigit(ch) || ch == '-' || ch == '.' {
ch = s.next()
}
if ch != eof {
s.unread() // we got identifier, put back latest char
}
return string(s.src[offs:s.srcPos.Offset])
}
// recentPosition returns the position of the character immediately after the
// character or token returned by the last call to Scan.
func (s *Scanner) recentPosition() (pos token.Pos) {
pos.Offset = s.srcPos.Offset - s.lastCharLen
switch {
case s.srcPos.Column > 0:
// common case: last character was not a '\n'
pos.Line = s.srcPos.Line
pos.Column = s.srcPos.Column
case s.lastLineLen > 0:
// last character was a '\n'
// (we cannot be at the beginning of the source
// since we have called next() at least once)
pos.Line = s.srcPos.Line - 1
pos.Column = s.lastLineLen
default:
// at the beginning of the source
pos.Line = 1
pos.Column = 1
}
return
}
// err prints the error of any scanning to s.Error function. If the function is
// not defined, by default it prints them to os.Stderr
func (s *Scanner) err(msg string) {
s.ErrorCount++
pos := s.recentPosition()
if s.Error != nil {
s.Error(pos, msg)
return
}
fmt.Fprintf(os.Stderr, "%s: %s\n", pos, msg)
}
// isHexadecimal returns true if the given rune is a letter
func isLetter(ch rune) bool {
return 'a' <= ch && ch <= 'z' || 'A' <= ch && ch <= 'Z' || ch == '_' || ch >= 0x80 && unicode.IsLetter(ch)
}
// isDigit returns true if the given rune is a decimal digit
func isDigit(ch rune) bool {
return '0' <= ch && ch <= '9' || ch >= 0x80 && unicode.IsDigit(ch)
}
// isDecimal returns true if the given rune is a decimal number
func isDecimal(ch rune) bool {
return '0' <= ch && ch <= '9'
}
// isHexadecimal returns true if the given rune is an hexadecimal number
func isHexadecimal(ch rune) bool {
return '0' <= ch && ch <= '9' || 'a' <= ch && ch <= 'f' || 'A' <= ch && ch <= 'F'
}
// isWhitespace returns true if the rune is a space, tab, newline or carriage return
func isWhitespace(ch rune) bool {
return ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r'
}
// digitVal returns the integer value of a given octal,decimal or hexadecimal rune
func digitVal(ch rune) int {
switch {
case '0' <= ch && ch <= '9':
return int(ch - '0')
case 'a' <= ch && ch <= 'f':
return int(ch - 'a' + 10)
case 'A' <= ch && ch <= 'F':
return int(ch - 'A' + 10)
}
return 16 // larger than any legal digit val
}

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