Viper 配置設定黨

配置設定黨

What is Viper

• https://github.com/spf13/viper

• setting defaults

• reading from JSON, TOML, YAML, HCL, envfile and Java properties config files

• live watching and re-reading of config files (optional)

• reading from environment variables

• reading from remote config systems (etcd or Consul), and watching changes

• reading from command line flags

• reading from buffer

• setting explicit values

sample

func viperSetting(configPath string) error {
	viper.SetConfigType(defaultConfigType)
	viper.AddConfigPath(configPath)
	viper.SetConfigName(serviceFileName)

	if err := viper.ReadInConfig(); err != nil {
		return errors.Errorf("viper.ReadInConfig error(%v)", err)
	}
	fmt.Println("viper.ConfigFileUsed OK:", viper.ConfigFileUsed())

	viper.AutomaticEnv() //export  SERVICE_NAME=test2
	viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
	
	err := viper.Unmarshal(&configData) //bind struct
	if err != nil {
		return errors.Errorf("viper.Unmarshal:(%v)", err)
	}

	fmt.Println("data:", viper.Get("service.name"))
	fmt.Println("Service.Name:", configData.Service.Name)
	return nil
}

watch

	viper.WatchConfig()
	viper.OnConfigChange(func(e fsnotify.Event) {
		fmt.Println("Config file changed:", e.Name)
		if err := viper.Unmarshal(&Topics); err != nil {
			// return err
		}
	})

reference

reference
在 Go 語言使用 Viper 管理設定檔 https://blog.wu-boy.com/2017/10/go-configuration-with-viper/
Golang的配置資訊處理框架Viper【專案地址 https://www.itread01.com/content/1543084987.html
golang基礎學習-動態獲取配置檔案(viper） https://www.mdeditor.tw/pl/pM5S/zh-tw
Multiple config files with go-viper