Go Project Structure - main.go

main.go

func main() {
	// Initiate a simple logger
	log := logrus.New()

	// Setup Config
	cfg := viper.New()

	// Set Default Configs
	cfg.SetDefault("enable_tls", true)
	cfg.SetDefault("listen_addr", "0.0.0.0:8443")
	cfg.SetDefault("cert_file", "/certs/cert.crt")
	cfg.SetDefault("key_file", "/certs/key.key")

	// Load Config
	cfg.AddConfigPath("./conf")
	cfg.SetEnvPrefix("app")
	cfg.AllowEmptyEnv(true)
	cfg.AutomaticEnv()
	err := cfg.ReadInConfig()
	if err != nil {
		switch err.(type) {
		case viper.ConfigFileNotFoundError:
			log.Warnf("No Config file found, loaded config from Environment - Default path ./conf")
		default:
			log.Fatalf("Error when Fetching Configuration - %s", err)
		}
	}

	// Run application
	err = app.Run(cfg)
	if err != nil && err != app.ErrShutdown {
		log.Fatalf("Service stopped - %s", err)
	}
	log.Infof("Service shutdown - %s", err)
}