Viper Config

gistfile1.txt

package config

import (
	"os"
	"strings"

	"github.com/spf13/viper"
)

type Config struct {
	Service    Service    `mapstructure:"service"`
}

// Read reads the CONFIG_PATH environment variable for finding
// the location of config file. In case CONFIG_PATH is not being set
// it returns the default values for config
func Read() (*Config, error) {
	var err error

	viper := viper.New()

	viper.SetConfigName("config")
	viper.SetEnvPrefix("RONDO")
	viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
	viper.AutomaticEnv()

	path := os.Getenv("CONFIG_PATH")

	if path == "" {
		err = viper.ReadConfig(strings.NewReader("{}"))
	} else {
		viper.AddConfigPath(path)
		err = viper.ReadInConfig()
	}

	if err != nil {
		return nil, err
	}

	config := &Config{}
	err = viper.Unmarshal(config)
	if err != nil {
		return nil, err
	}

	return config, nil
}