ghkdqhrbals:viper

viper을 통해 configuration 설정

/app.env configuration 구성

DB_DRIVER=postgres
DB_SOURCE=postgresql://root:secret@localhost:5432/simple_bank?sslmode=disable
SERVER_ADDRESS=0.0.0.0:8080

/util/config.go 구성

// JSON to Config
type Config struct {
	DBDriver      string `mapstructure:"DB_DRIVER"`
	DBSource      string `mapstructure:"DB_SOURCE"`
	ServerAddress string `mapstructure:"SERVER_ADDRESS"`
}

func LoadConfig(path string) (config Config, err error) {
	viper.AddConfigPath(path)
	viper.SetConfigName("app")
	viper.SetConfigType("env")

	viper.AutomaticEnv()

	err = viper.ReadInConfig()
	if err != nil {
		return
	}

	err = viper.Unmarshal(&config)
	return
}

/main.go config 자동설정 구성

config, err := util.LoadConfig(".")
	if err != nil {
		log.Fatal("cannot load config:", err)
	}