Simple Templating in Go

simple-templating.go

package main

import (
	"fmt"
	"regexp"
)

func main() {
	str := "my string and {{ foo }} and {{bar}}!"
	str = template(str, map[string]string{"foo": "1", "bar": "2"})
	fmt.Println(str)
}

var templateRe = regexp.MustCompile(`\{\{\s*(\w+)\s*\}\}`)

func template(str string, vars map[string]string) string {
	return templateRe.ReplaceAllStringFunc(str, func(key string) string {
		return vars[templateRe.FindStringSubmatch(key)[1]]
	})
}