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templates: Add custom template function registration (#4757)

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* Add custom template function registration

* Rename TemplateFunctions to CustomFunctions

* Add documentation

* Document CustomFunctions interface

* Preallocate custom functions map list

* Fix interface name in error message
This commit is contained in:
Tyler Kropp 2022-05-02 16:55:34 -04:00 • committed by GitHub
parent 4a223f5203
commit e84e19a04e
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2 changed files with 38 additions and 8 deletions
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14
modules/caddyhttp/templates/tplcontext.go
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@ -40,10 +40,11 @@ import (
// TemplateContext is the TemplateContext with which HTTP templates are executed.
type TemplateContext struct {
Root http.FileSystem
Req *http.Request
Args []interface{} // defined by arguments to funcInclude
RespHeader WrappedHeader
Root http.FileSystem
Req *http.Request
Args []interface{} // defined by arguments to funcInclude
RespHeader WrappedHeader
CustomFuncs []template.FuncMap // functions added by plugins
config *Templates
tpl *template.Template
@ -62,6 +63,11 @@ func (c *TemplateContext) NewTemplate(tplName string) *template.Template {
// add sprig library
c.tpl.Funcs(sprigFuncMap)
// add all custom functions
for _, funcMap := range c.CustomFuncs {
c.tpl.Funcs(funcMap)
}
// add our own library
c.tpl.Funcs(template.FuncMap{
"include": c.funcInclude,