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diff --git a/vendor/github.com/Masterminds/sprig/v3/README.md b/vendor/github.com/Masterminds/sprig/v3/README.md new file mode 100644 index 000000000..3e22c60e1 --- /dev/null +++ b/vendor/github.com/Masterminds/sprig/v3/README.md @@ -0,0 +1,100 @@ +# Sprig: Template functions for Go templates + +[](https://pkg.go.dev/github.com/Masterminds/sprig/v3) +[](https://goreportcard.com/report/github.com/Masterminds/sprig) +[](https://masterminds.github.io/stability/sustained.html) +[](https://github.com/Masterminds/sprig/actions) + +The Go language comes with a [built-in template +language](http://golang.org/pkg/text/template/), but not +very many template functions. Sprig is a library that provides more than 100 commonly +used template functions. + +It is inspired by the template functions found in +[Twig](http://twig.sensiolabs.org/documentation) and in various +JavaScript libraries, such as [underscore.js](http://underscorejs.org/). + +## IMPORTANT NOTES + +Sprig leverages [mergo](https://github.com/imdario/mergo) to handle merges. In +its v0.3.9 release, there was a behavior change that impacts merging template +functions in sprig. It is currently recommended to use v0.3.10 or later of that package. +Using v0.3.9 will cause sprig tests to fail. + +## Package Versions + +There are two active major versions of the `sprig` package. + +* v3 is currently stable release series on the `master` branch. The Go API should + remain compatible with v2, the current stable version. Behavior change behind + some functions is the reason for the new major version. +* v2 is the previous stable release series. It has been more than three years since + the initial release of v2. You can read the documentation and see the code + on the [release-2](https://github.com/Masterminds/sprig/tree/release-2) branch. + Bug fixes to this major version will continue for some time. + +## Usage + +**Template developers**: Please use Sprig's [function documentation](http://masterminds.github.io/sprig/) for +detailed instructions and code snippets for the >100 template functions available. + +**Go developers**: If you'd like to include Sprig as a library in your program, +our API documentation is available [at GoDoc.org](http://godoc.org/github.com/Masterminds/sprig). + +For standard usage, read on. + +### Load the Sprig library + +To load the Sprig `FuncMap`: + +```go + +import ( + "github.com/Masterminds/sprig/v3" + "html/template" +) + +// 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. |