esub

esub

A library to replace string placeholders with environment variables.

Usage

package main

import (
	"fmt"
	"os"

	"github.com/winebarrel/esub"
)

func main() {
	os.Setenv("foo", "ZOO")
	os.Setenv("BAR", "baz")
	tmpl := "foo:${foo} BAR:${BAR}"
	out, err := esub.Fill(tmpl)
	if err != nil {
		panic(err)
	}
	fmt.Println(out) //=> "foo:ZOO BAR:baz"
}

Escape Placeholders

tmpl := "foo:$${foo} BAR:${BAR}"
//           ^^^
out, _ := esub.Fill(tmpl)
fmt.Println(out) //=> "foo:${foo} BAR:baz"