github.com/kaisenlinux/docker.io@v0.0.0-20230510090727-ea55db55fac7/swarmkit/template/template.go (about)

     1  package template
     2  
     3  import (
     4  	"strings"
     5  	"text/template"
     6  )
     7  
     8  // funcMap defines functions for our template system.
     9  var funcMap = template.FuncMap{
    10  	"join": func(s ...string) string {
    11  		// first arg is sep, remaining args are strings to join
    12  		return strings.Join(s[1:], s[0])
    13  	},
    14  }
    15  
    16  func newTemplate(s string, extraFuncs template.FuncMap) (*template.Template, error) {
    17  	tmpl := template.New("expansion").Option("missingkey=error").Funcs(funcMap)
    18  	if len(extraFuncs) != 0 {
    19  		tmpl = tmpl.Funcs(extraFuncs)
    20  	}
    21  	return tmpl.Parse(s)
    22  }