Function previewTemplate

internal/cli/universal_login_templates.go:337–384

(ctx context.Context, data *TemplateData)

}

func previewTemplate(ctx context.Context, data *TemplateData) error {
	ctx, cancel := context.WithCancel(ctx)
	defer cancel()

	listener, err := net.Listen("tcp", "127.0.0.1:0")
	if err != nil {
		return err
	}
	defer func() {
		_ = listener.Close()
	}()

	changesChan, err := broadcastTemplateChanges(ctx, data.Filename)
	if err != nil {
		return err
	}

	requestTimeout := 10 * time.Minute
	server := &http.Server{
		Handler:      buildRoutes(requestTimeout, data, changesChan),
		ReadTimeout:  requestTimeout + time.Minute,
		WriteTimeout: requestTimeout + time.Minute,
	}
	defer func() {
		_ = server.Close()
	}()

	go func() {
		if err = server.Serve(listener); err != http.ErrServerClosed {
			cancel()
		}
	}()

	storybookURL := &url.URL{
		Scheme:   "http",
		Host:     listener.Addr().String(),
		Path:     "/data/branding/storybook/",
		RawQuery: (url.Values{"path": []string{"/story/universal-login--prompts"}}).Encode(),
	}

	if err := browser.OpenURL(storybookURL.String()); err != nil {
		return err
	}

	// Wait until the file is closed or input is cancelled.
	<-ctx.Done()
	return nil
}

func buildRoutes(
	requestTimeout time.Duration,