func main()

in main.go [26:87]
55 lines of code
12 McCabe index (conditional complexity)

func main() {
	flag.Parse()
	s, err := newServer(func(s *server) error {
		pid := projectID()
		if pid == "" {
			s.db = &inMemStore{}
		} else {
			c, err := datastore.NewClient(context.Background(), pid)
			if err != nil {
				return fmt.Errorf("could not create cloud datastore client: %v", err)
			}
			s.db = cloudDatastore{client: c}
		}
		if caddr := os.Getenv("MEMCACHED_ADDR"); caddr != "" {
			s.cache = newGobCache(caddr)
			log.Printf("App (project ID: %q) is caching results", pid)
		} else {
			s.cache = (*gobCache)(nil) // Use a no-op cache implementation.
			log.Printf("App (project ID: %q) is NOT caching results", pid)
		}
		s.log = log
		if gotip := os.Getenv("GOTIP"); gotip == "true" {
			s.gotip = true
		}
		execpath, _ := os.Executable()
		if execpath != "" {
			if fi, _ := os.Stat(execpath); fi != nil {
				s.modtime = fi.ModTime()
			}
		}
		eh, err := newExamplesHandler(s.gotip, s.modtime)
		if err != nil {
			return err
		}
		s.examples = eh
		return nil
	}, enableMetrics)
	if err != nil {
		log.Fatalf("Error creating server: %v", err)
	}

	if *runtests {
		s.test()
		return
	}
	if *backendURL != "" {
		// TODO(golang.org/issue/25224) - Remove environment variable and use a flag.
		os.Setenv("SANDBOX_BACKEND_URL", *backendURL)
	}

	port := os.Getenv("PORT")
	if port == "" {
		port = "8080"
	}

	// Get the backend dialer warmed up. This starts
	// RegionInstanceGroupDialer queries and health checks.
	go sandboxBackendClient()

	log.Printf("Listening on :%v ...", port)
	log.Fatalf("Error listening on :%v: %v", port, http.ListenAndServe(":"+port, s))
}