mirror of
https://github.com/ceph/ceph-csi.git
synced 2025-03-10 09:29:30 +00:00
f87d06ed85
Several packages are only used while running the e2e suite. These packages are less important to update, as the they can not influence the final executable that is part of the Ceph-CSI container-image. By moving these dependencies out of the main Ceph-CSI go.mod, it is easier to identify if a reported CVE affects Ceph-CSI, or only the testing (like most of the Kubernetes CVEs). Signed-off-by: Niels de Vos <ndevos@ibm.com>
151 lines
3.4 KiB
Markdown
151 lines
3.4 KiB
Markdown
# YAML support for the Go language
|
|
|
|
Introduction
|
|
------------
|
|
|
|
The yaml package enables Go programs to comfortably encode and decode YAML
|
|
values. It was developed within [Canonical](https://www.canonical.com) as
|
|
part of the [juju](https://juju.ubuntu.com) project, and is based on a
|
|
pure Go port of the well-known [libyaml](http://pyyaml.org/wiki/LibYAML)
|
|
C library to parse and generate YAML data quickly and reliably.
|
|
|
|
Compatibility
|
|
-------------
|
|
|
|
The yaml package supports most of YAML 1.2, but preserves some behavior
|
|
from 1.1 for backwards compatibility.
|
|
|
|
Specifically, as of v3 of the yaml package:
|
|
|
|
- YAML 1.1 bools (_yes/no, on/off_) are supported as long as they are being
|
|
decoded into a typed bool value. Otherwise they behave as a string. Booleans
|
|
in YAML 1.2 are _true/false_ only.
|
|
- Octals encode and decode as _0777_ per YAML 1.1, rather than _0o777_
|
|
as specified in YAML 1.2, because most parsers still use the old format.
|
|
Octals in the _0o777_ format are supported though, so new files work.
|
|
- Does not support base-60 floats. These are gone from YAML 1.2, and were
|
|
actually never supported by this package as it's clearly a poor choice.
|
|
|
|
and offers backwards
|
|
compatibility with YAML 1.1 in some cases.
|
|
1.2, including support for
|
|
anchors, tags, map merging, etc. Multi-document unmarshalling is not yet
|
|
implemented, and base-60 floats from YAML 1.1 are purposefully not
|
|
supported since they're a poor design and are gone in YAML 1.2.
|
|
|
|
Installation and usage
|
|
----------------------
|
|
|
|
The import path for the package is *gopkg.in/yaml.v3*.
|
|
|
|
To install it, run:
|
|
|
|
go get gopkg.in/yaml.v3
|
|
|
|
API documentation
|
|
-----------------
|
|
|
|
If opened in a browser, the import path itself leads to the API documentation:
|
|
|
|
- [https://gopkg.in/yaml.v3](https://gopkg.in/yaml.v3)
|
|
|
|
API stability
|
|
-------------
|
|
|
|
The package API for yaml v3 will remain stable as described in [gopkg.in](https://gopkg.in).
|
|
|
|
|
|
License
|
|
-------
|
|
|
|
The yaml package is licensed under the MIT and Apache License 2.0 licenses.
|
|
Please see the LICENSE file for details.
|
|
|
|
|
|
Example
|
|
-------
|
|
|
|
```Go
|
|
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"log"
|
|
|
|
"gopkg.in/yaml.v3"
|
|
)
|
|
|
|
var data = `
|
|
a: Easy!
|
|
b:
|
|
c: 2
|
|
d: [3, 4]
|
|
`
|
|
|
|
// Note: struct fields must be public in order for unmarshal to
|
|
// correctly populate the data.
|
|
type T struct {
|
|
A string
|
|
B struct {
|
|
RenamedC int `yaml:"c"`
|
|
D []int `yaml:",flow"`
|
|
}
|
|
}
|
|
|
|
func main() {
|
|
t := T{}
|
|
|
|
err := yaml.Unmarshal([]byte(data), &t)
|
|
if err != nil {
|
|
log.Fatalf("error: %v", err)
|
|
}
|
|
fmt.Printf("--- t:\n%v\n\n", t)
|
|
|
|
d, err := yaml.Marshal(&t)
|
|
if err != nil {
|
|
log.Fatalf("error: %v", err)
|
|
}
|
|
fmt.Printf("--- t dump:\n%s\n\n", string(d))
|
|
|
|
m := make(map[interface{}]interface{})
|
|
|
|
err = yaml.Unmarshal([]byte(data), &m)
|
|
if err != nil {
|
|
log.Fatalf("error: %v", err)
|
|
}
|
|
fmt.Printf("--- m:\n%v\n\n", m)
|
|
|
|
d, err = yaml.Marshal(&m)
|
|
if err != nil {
|
|
log.Fatalf("error: %v", err)
|
|
}
|
|
fmt.Printf("--- m dump:\n%s\n\n", string(d))
|
|
}
|
|
```
|
|
|
|
This example will generate the following output:
|
|
|
|
```
|
|
--- t:
|
|
{Easy! {2 [3 4]}}
|
|
|
|
--- t dump:
|
|
a: Easy!
|
|
b:
|
|
c: 2
|
|
d: [3, 4]
|
|
|
|
|
|
--- m:
|
|
map[a:Easy! b:map[c:2 d:[3 4]]]
|
|
|
|
--- m dump:
|
|
a: Easy!
|
|
b:
|
|
c: 2
|
|
d:
|
|
- 3
|
|
- 4
|
|
```
|
|
|