This is a very simple proof of concept. This package basically provides a bundle class which can be used to create "virtual" bundles. Virtual bundles only exists for the Symfony kernel, but for you it's just a package which uses bundle conventions (like automatic mapping for Entity/).

This can be used to remove the "bundle" from AppBundle. Let me tell you how to get this working for your application.

This is pretty simple (if you're using Composer):

$ composer require wouterj/bundleless:1.*@dev

Use the new WouterJ\Bundleless\AppFocusedKernel as parent of your AppBundle:

// app/AppKernel.php

use WouterJ\Bundleless\AppFocusedKernel;

// ...
class AppKernel extends AppFocusedKernel
{
}

Then, remove that ugly AppBundle register line from your AppKernel. Bundeless will take care of it now.

// app/AppKernel.php

// ...
public function registerBundles()
{
    $bundles = array(
        // ...
        // comment or remove
        // new AppBundle\AppBundle();
}

You're already ready! You should move your application code outside of the AppBundle by removing the namespace and putting it in src/ directly. For instance:

// src/Controller/StaticController.php
namespace App\Controller;

use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;

class StaticController extends Controller
{
    /**
     * @Route("/")
     */
    public function homepageAction()
    {
        return $this->render('static/homepage.html.twig');
    }
}

# app/config/routing.yml
app:
    resource: "@App/Controller"
    type: annotation

That's it. Apart from the template file, you now have a working homepage!

The AppBundle is created using the Kernel#getAppBundle() method. Override this method in your AppKernel to customize it.

This project is released under the MIT license, it's just 2 files anyway.