Symfony\Component\DependencyInjection\ContainerBuilder::compile PHP Method

    public function compile()
    {
        $compiler = $this->getCompiler();

        if ($this->trackResources) {
            foreach ($compiler->getPassConfig()->getPasses() as $pass) {
                $this->addObjectResource($pass);
            }
        }

        $compiler->compile($this);

        foreach ($this->definitions as $id => $definition) {
            if (!$definition->isPublic()) {
                $this->privates[$id] = true;
            }
            if ($this->trackResources && $definition->isLazy() && ($class = $definition->getClass()) && class_exists($class)) {
                $this->addClassResource(new \ReflectionClass($class));
            }
        }

        $this->extensionConfigs = array();
        $bag = $this->getParameterBag();

        parent::compile();

        $this->envPlaceholders = $bag instanceof EnvPlaceholderParameterBag ? $bag->getEnvPlaceholders() : array();
    }

 /**
  * @param null $configPath
  * @param array $configFilenames
  */
 function __construct($configPath = null, $configFilenames = array())
 {
     $configPath = $configPath == null ? __DIR__ . '/../../../../../../app/config' : $configPath;
     $this->container = new ContainerBuilder();
     // Load app parameters and config files into container
     $loader = new YamlFileLoader($this->container, new FileLocator($configPath));
     $loader->load('parameters.yml');
     foreach ($configFilenames as $filename) {
         $loader->load($filename);
     }
     $appName = $this->container->getParameter('application_name');
     $appVersion = $this->container->getParameter('application_version');
     parent::__construct($appName, $appVersion);
     // Set dispatcher definition, register listeners and subscribers
     $dispatcherDef = $this->container->register('event_dispatcher', 'Symfony\\Component\\EventDispatcher\\ContainerAwareEventDispatcher');
     $dispatcherDef->addArgument($this->container);
     $this->registerEventListeners();
     $this->container->compile();
     // Once container is compiled we can get the event_dispatcher from dic
     $this->dispatcher = $this->container->get('event_dispatcher');
     // Add console commands (services console.command tagged)
     foreach ($this->getTaggedCommands() as $id) {
         $command = $this->container->get($id);
         $this->add($command);
     }
 }