viper

1. viper란?

viper는 go로 작성된 complete configuration solution

 

2. 다운로드

go get github.com/spf13/viper

 

3. 사용

1) default 값 설정

viper.SetDefault("ContentDir", "content")

viper.SetDefault("LayoutDir", "layouts")

viper.SetDefault("Taxonomies", map[string]string{"tag": "tags", "category": "categories"})

 

2) config 파일 읽기

viper.SetConfigName("config") // name of config file (without extension)

viper.SetConfigType("yaml") // REQUIRED if the config file does not have the extension in the name viper.AddConfigPath("/etc/appname/") // path to look for the config file in

viper.AddConfigPath("$HOME/.appname") // call multiple times to add many search paths

viper.AddConfigPath(".") // optionally look for config in the working directory

err := viper.ReadInConfig() // Find and read the config file

if err != nil { // Handle errors reading the config file

     panic(fmt.Errorf("Fatal error config file: %s \n", err))

}

 

3) config 파일 쓰기

viper.WriteConfig()

viper.SafeWriteConfig()

viper.WriteConfigAs("/path/to/my/.config")

viper.SafeWriteConfigAs("/path/to/my/.config") // will error since it has already been written viper.SafeWriteConfigAs("/path/to/my/.other_config")

 

4) 실시간 config 읽기

viper.WatchConfig()        //실시간 config 체크 설정

viper.OnConfigChange(func(e fsnotify.Event) {

      fmt.Println("Config file changed:", e.Name)

})

 

 

link : github.com/spf13/viper

spf13/viper