Function startDevServer

client/web/assets.go:76–103

startDevServer starts the JS dev server that does on-demand rebuilding and serving of web client JS and CSS resources.

()

// startDevServer starts the JS dev server that does on-demand rebuilding
// and serving of web client JS and CSS resources.
func startDevServer() (cleanup func()) {
	root := gitRootDir()
	webClientPath := filepath.Join(root, "client", "web")

	yarn := filepath.Join(root, "tool", "yarn")
	node := filepath.Join(root, "tool", "node")
	vite := filepath.Join(webClientPath, "node_modules", ".bin", "vite")

	log.Printf("installing JavaScript deps using %s...", yarn)
	out, err := exec.Command(yarn, "--non-interactive", "-s", "--cwd", webClientPath, "install").CombinedOutput()
	if err != nil {
		log.Fatalf("error running tailscale web's yarn install: %v, %s", err, out)
	}
	log.Printf("starting JavaScript dev server...")
	cmd := exec.Command(node, vite)
	cmd.Dir = webClientPath
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr
	if err := cmd.Start(); err != nil {
		log.Fatalf("Starting JS dev server: %v", err)
	}
	log.Printf("JavaScript dev server running as pid %d", cmd.Process.Pid)
	return func() {
		cmd.Process.Signal(os.Interrupt)
		err := cmd.Wait()
		log.Printf("JavaScript dev server exited: %v", err)
	}
}

// devServerProxy returns a reverse proxy to the vite dev server.
func devServerProxy() *httputil.ReverseProxy {