DrupalPimpleContainer.php

<?php

namespace Drupal\Core\DependencyInjection;

use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Routing\RequestContext;
use Drupal\Core\DrupalKernel;
use Drupal\Core\Response\DrupalResponse;
use Drupal\Core\Routes\DrupalRoutes;

class DrupalPimpleContainer extends \Pimple {
  public function __construct() {
    $container = $this;

    $this['request'] = $this->share(
      function () {
        return Request::createFromGlobals();
      }
    );

    $this['context'] = $this->share(
      function ($container) {
        return new RequestContext($container['request']);
      }
    );

    $this['router'] = $this->share(
      function () {
        $router = new DrupalRoutes();
        return $router->getRoutes();
      }
    );

    $this['response'] = $this->share(
      function ($container) {
        return new DrupalResponse($container['context'], $container['router']);
      }
    );

    $this['kernel'] = $this->share(
      function ($container) {
        $kernel = new DrupalKernel($container['response']);
        return $kernel->handle($container['request']);
      }
    );
  }
}