Support Pretty Print? about config HOT 4 CLOSED

func saveConfigToFile(configIns config.Config, configFilePath string) error {
	//Save config file
	buf := new(bytes.Buffer)
	if _, err := configIns.DumpTo(buf, config.JSON); err != nil {
		return fmt.Errorf(err.Error())
	}
	//Pretty print the JSON
	var out bytes.Buffer
	err := json.Indent(&out, buf.Bytes(), "", "    ")
	if err != nil {
		return fmt.Errorf(err.Error())
	}
	ioutil.WriteFile(filepath.Join(configFilePath), out.Bytes(), 0755)
	return nil
}

configIns.SetEncoder(config.JSON, func(v interface{}) ([]byte, error) {
    return json.MarshalIndent(v, "", "    ")
})