package main

import "fmt"
import "reflect"

//import "os"

type EnvVar struct {
	Lang string `env:"LANG"`
	Path string `env:"PATH"`
}

func main() {
	envVar := &EnvVar{
		Lang: "ja_JP.UTF-8",
		Path: "/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin",
	}

	v := reflect.ValueOf(envVar).Elem()
	t := v.Type()
	for i := 0; i < v.NumField(); i++ {
		name := t.Field(i).Tag.Get("env")
		value := v.Field(i).String()

		fmt.Printf("%s = %s\n", name, value)

		//os.Setenv(name, value)
	}
}