mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-18 04:10:22 +00:00
6709cdd1d0
There was a `replace` statement in `go.mod` that prevented Ginkgo from updating. Kubernetes 1.27 requires a new Ginkgo version. Signed-off-by: Niels de Vos <ndevos@ibm.com>
74 lines
2.7 KiB
Markdown
74 lines
2.7 KiB
Markdown
# Slim-Sprig: Template functions for Go templates [](https://godoc.org/github.com/go-task/slim-sprig) [](https://goreportcard.com/report/github.com/go-task/slim-sprig)
|
|
|
|
Slim-Sprig is a fork of [Sprig](https://github.com/Masterminds/sprig), but with
|
|
all functions that depend on external (non standard library) or crypto packages
|
|
removed.
|
|
The reason for this is to make this library more lightweight. Most of these
|
|
functions (specially crypto ones) are not needed on most apps, but costs a lot
|
|
in terms of binary size and compilation time.
|
|
|
|
## Usage
|
|
|
|
**Template developers**: Please use Slim-Sprig's [function documentation](https://go-task.github.io/slim-sprig/) for
|
|
detailed instructions and code snippets for the >100 template functions available.
|
|
|
|
**Go developers**: If you'd like to include Slim-Sprig as a library in your program,
|
|
our API documentation is available [at GoDoc.org](http://godoc.org/github.com/go-task/slim-sprig).
|
|
|
|
For standard usage, read on.
|
|
|
|
### Load the Slim-Sprig library
|
|
|
|
To load the Slim-Sprig `FuncMap`:
|
|
|
|
```go
|
|
|
|
import (
|
|
"html/template"
|
|
|
|
"github.com/go-task/slim-sprig"
|
|
)
|
|
|
|
// This example illustrates that the FuncMap *must* be set before the
|
|
// templates themselves are loaded.
|
|
tpl := template.Must(
|
|
template.New("base").Funcs(sprig.FuncMap()).ParseGlob("*.html")
|
|
)
|
|
```
|
|
|
|
### Calling the functions inside of templates
|
|
|
|
By convention, all functions are lowercase. This seems to follow the Go
|
|
idiom for template functions (as opposed to template methods, which are
|
|
TitleCase). For example, this:
|
|
|
|
```
|
|
{{ "hello!" | upper | repeat 5 }}
|
|
```
|
|
|
|
produces this:
|
|
|
|
```
|
|
HELLO!HELLO!HELLO!HELLO!HELLO!
|
|
```
|
|
|
|
## Principles Driving Our Function Selection
|
|
|
|
We followed these principles to decide which functions to add and how to implement them:
|
|
|
|
- Use template functions to build layout. The following
|
|
types of operations are within the domain of template functions:
|
|
- Formatting
|
|
- Layout
|
|
- Simple type conversions
|
|
- Utilities that assist in handling common formatting and layout needs (e.g. arithmetic)
|
|
- Template functions should not return errors unless there is no way to print
|
|
a sensible value. For example, converting a string to an integer should not
|
|
produce an error if conversion fails. Instead, it should display a default
|
|
value.
|
|
- Simple math is necessary for grid layouts, pagers, and so on. Complex math
|
|
(anything other than arithmetic) should be done outside of templates.
|
|
- Template functions only deal with the data passed into them. They never retrieve
|
|
data from a source.
|
|
- Finally, do not override core Go template functions.
|