Method Run

app.go:596–603

Run starts the application, blocks on the signals channel, and then gracefully shuts the application down. It uses [DefaultTimeout] to set a deadline for application startup and shutdown, unless the user has configured different timeouts with the [StartTimeout] or [StopTimeout] options. It's designe

()

// if startup or shutdown operations fail,
// or if the [Shutdowner] supplied a non-zero exit code.
func (app *App) Run() {
	// Historically, we do not os.Exit(0) even though most applications
	// cede control to Fx with they call app.Run. To avoid a breaking
	// change, never os.Exit for success.
	if code := app.run(app.Wait); code != 0 {
		app.exit(code)
	}
}

func (app *App) run(done func() <-chan ShutdownSignal) (exitCode int) {
	startCtx, cancel := app.clock.WithTimeout(context.Background(), app.StartTimeout())