Beego different configs

main.go

............

//another config placed in conf/prod/app.conf

func Init() { //old init()
    //something like init database
}

func main() {
	if beego.RunMode == "dev" {
		beego.DirectoryIndex = true
		beego.StaticDir["/swagger"] = "swagger"
	}
	detectProdConfig()
	Init()
	beego.Run()
}

func detectProdConfig(){
	apppath, _ := filepath.Abs(filepath.Dir(beego.AppConfigPath))
	appConfigPatgh := apppath + string(filepath.Separator) + "prod" + string(filepath.Separator) + "app.conf"
	if(fileExists(appConfigPatgh)) {
		beego.AppConfigPath = appConfigPatgh
		beego.ParseConfig()
	}
}

func fileExists(name string) bool {
	if _, err := os.Stat(name); err != nil {
		if os.IsNotExist(err) {
			return false
		}
	}
	return true
}