Golang DI Injectors

injectDependency.go

// Provider
func NewFirebaseApp() *firebase.App {
  opt := option.WithCredentialsFile(filename)
  app, err := firebase.NewApp(context.Background(), nil, opt)
  if err != nil {
    log.Fatalf("error initializing app: %v\n", err)
  }
	return app
}

// Provider
func NewFirebaseClient(app *firebase.App) *auth.Client {
	client, err := app.Auth(context.Background())
	if err != nil {
		log.Fatalf("error initializing auth client: %v\n", err)
	}
	return client
}

// Injector
func InitializeFirebase() *auth.Client {
	wire.Build(NewFirebaseApp, NewFirebaseClient)
	return &auth.Client{}
}

injectPlain.go

// Use Same Providers as above.
func InitializeFirebase() *auth.Client {
	app := NewFirebaseApp()
	client := NewFirebaseClient(app)
	return client
}