4 files changed, 462 insertions, 325 deletions
diff --git a/phpBB/phpbb/di/container_builder.php b/phpBB/phpbb/di/container_builder.php
index 638c13e86d..4a31339b9a 100644
--- a/phpBB/phpbb/di/container_builder.php
+++ b/phpBB/phpbb/di/container_builder.php
@@ -13,393 +13,503 @@
 
 namespace phpbb\di;
 
+use phpbb\filesystem\filesystem;
+use Symfony\Component\Config\ConfigCache;
+use Symfony\Component\Config\FileLocator;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Dumper\PhpDumper;
-use Symfony\Component\HttpKernel\DependencyInjection\RegisterListenersPass;
+use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBag;
+use Symfony\Component\EventDispatcher\DependencyInjection\RegisterListenersPass;
+use Symfony\Component\Filesystem\Exception\IOException;
+use Symfony\Component\HttpKernel\DependencyInjection\MergeExtensionConfigurationPass;
 
 class container_builder
 {
-	/** @var string phpBB Root Path */
-	protected $phpbb_root_path;
-
-	/** @var string php file extension  */
-	protected $php_ext;
-
 	/**
-	* The container under construction
-	*
-	* @var ContainerBuilder
-	*/
-	protected $container;
+	 * @var string The environment to use.
+	 */
+	protected $environment;
 
 	/**
-	* @var \phpbb\db\driver\driver_interface
-	*/
-	protected $dbal_connection = null;
+	 * @var string phpBB Root Path
+	 */
+	protected $phpbb_root_path;
 
 	/**
-	* @var array the installed extensions
-	*/
-	protected $installed_exts = null;
+	 * @var string php file extension
+	 */
+	protected $php_ext;
 
 	/**
-	* Indicates whether the php config file should be injected into the container (default to true).
-	*
-	* @var bool
-	*/
-	protected $inject_config = true;
+	 * The container under construction
+	 *
+	 * @var ContainerBuilder
+	 */
+	protected $container;
 
 	/**
-	* Indicates whether extensions should be used (default to true).
-	*
-	* @var bool
-	*/
+	 * Indicates whether extensions should be used (default to true).
+	 *
+	 * @var bool
+	 */
 	protected $use_extensions = true;
 
 	/**
-	* Defines a custom path to find the configuration of the container (default to $this->phpbb_root_path . 'config')
-	*
-	* @var string
-	*/
+	 * Defines a custom path to find the configuration of the container (default to $this->phpbb_root_path . 'config')
+	 *
+	 * @var string
+	 */
 	protected $config_path = null;
 
 	/**
-	* Indicates whether the phpBB compile pass should be used (default to true).
-	*
-	* @var bool
-	*/
-	protected $use_custom_pass = true;
+	 * Indicates whether the container should be dumped to the filesystem (default to true).
+	 *
+	 * If DEBUG_CONTAINER is set this option is ignored and a new container is build.
+	 *
+	 * @var bool
+	 */
+	protected $use_cache = true;
 
 	/**
-	* Indicates whether the kernel compile pass should be used (default to true).
-	*
-	* @var bool
-	*/
-	protected $use_kernel_pass = true;
+	 * Indicates if the container should be compiled automatically (default to true).
+	 *
+	 * @var bool
+	 */
+	protected $compile_container = true;
 
 	/**
-	* Indicates whether the container should be dumped to the filesystem (default to true).
-	*
-	* If DEBUG_CONTAINER is set this option is ignored and a new container is build.
-	*
-	* @var bool
-	*/
-	protected $dump_container = true;
+	 * Custom parameters to inject into the container.
+	 *
+	 * Default to:
+	 * 	array(
+	 * 		'core.root_path', $this->phpbb_root_path,
+	 * 		'core.php_ext', $this->php_ext,
+	 * );
+	 *
+	 * @var array
+	 */
+	protected $custom_parameters = null;
 
 	/**
-	* Indicates if the container should be compiled automatically (default to true).
-	*
-	* @var bool
-	*/
-	protected $compile_container = true;
+	 * @var \phpbb\config_php_file
+	 */
+	protected $config_php_file;
 
 	/**
-	* Custom parameters to inject into the container.
-	*
-	* Default to true:
-	* 	array(
-	* 		'core.root_path', $this->phpbb_root_path,
-	* 		'core.php_ext', $this->php_ext,
-	* );
-	*
-	* @var array
-	*/
-	protected $custom_parameters = null;
+	 * @var string
+	 */
+	protected $cache_dir;
 
 	/**
-	* @var \phpbb\config_php_file
-	*/
-	protected $config_php_file;
+	 * @var array
+	 */
+	private $container_extensions;
 
 	/**
-	* Constructor
-	*
-	* @param \phpbb\config_php_file $config_php_file
-	* @param string $phpbb_root_path Path to the phpbb includes directory.
-	* @param string $php_ext php file extension
-	*/
-	function __construct(\phpbb\config_php_file $config_php_file, $phpbb_root_path, $php_ext)
+	 * Constructor
+	 *
+	 * @param string $phpbb_root_path Path to the phpbb includes directory.
+	 * @param string $php_ext php file extension
+	 */
+	function __construct($phpbb_root_path, $php_ext)
 	{
-		$this->config_php_file = $config_php_file;
 		$this->phpbb_root_path = $phpbb_root_path;
 		$this->php_ext = $php_ext;
 	}
 
 	/**
-	* Build and return a new Container respecting the current configuration
-	*
-	* @return \phpbb_cache_container|ContainerBuilder
-	*/
+	 * Build and return a new Container respecting the current configuration
+	 *
+	 * @return \phpbb_cache_container|ContainerBuilder
+	 */
 	public function get_container()
 	{
 		$container_filename = $this->get_container_filename();
-		if (!defined('DEBUG_CONTAINER') && $this->dump_container && file_exists($container_filename))
+		$config_cache = new ConfigCache($container_filename, defined('DEBUG'));
+		if ($this->use_cache && $config_cache->isFresh())
 		{
-			require($container_filename);
+			require($config_cache->getPath());
 			$this->container = new \phpbb_cache_container();
 		}
 		else
 		{
-			if ($this->config_path === null)
-			{
-				$this->config_path = $this->phpbb_root_path . 'config';
-			}
-			$container_extensions = array(new \phpbb\di\extension\core($this->config_path));
+			$this->container_extensions = array(new extension\core($this->get_config_path()));
 
 			if ($this->use_extensions)
 			{
-				$installed_exts = $this->get_installed_extensions();
-				$container_extensions[] = new \phpbb\di\extension\ext($installed_exts);
+				$this->load_extensions();
 			}
 
-			if ($this->inject_config)
+			// Inject the config
+			if ($this->config_php_file)
 			{
-				$container_extensions[] = new \phpbb\di\extension\config($this->config_php_file);
+				$this->container_extensions[] = new extension\config($this->config_php_file);
 			}
 
-			$this->container = $this->create_container($container_extensions);
+			$this->container = $this->create_container($this->container_extensions);
 
-			if ($this->use_custom_pass)
-			{
-				// Symfony Kernel Listeners
-				$this->container->addCompilerPass(new \phpbb\di\pass\collection_pass());
-				$this->container->addCompilerPass(new RegisterListenersPass('dispatcher', 'event.listener_listener', 'event.listener'));
+			// Easy collections through tags
+			$this->container->addCompilerPass(new pass\collection_pass());
 
-				if ($this->use_kernel_pass)
-				{
-					$this->container->addCompilerPass(new RegisterListenersPass('dispatcher'));
-				}
-			}
+			// Event listeners "phpBB style"
+			$this->container->addCompilerPass(new RegisterListenersPass('dispatcher', 'event.listener_listener', 'event.listener'));
+
+			// Event listeners "Symfony style"
+			$this->container->addCompilerPass(new RegisterListenersPass('dispatcher'));
+
+			$filesystem = new filesystem();
+			$loader     = new YamlFileLoader($this->container, new FileLocator($filesystem->realpath($this->get_config_path())));
+			$loader->load($this->container->getParameter('core.environment') . '/config.yml');
 
 			$this->inject_custom_parameters();
 
 			if ($this->compile_container)
 			{
 				$this->container->compile();
-			}
 
-			if ($this->dump_container && !defined('DEBUG_CONTAINER'))
-			{
-				$this->dump_container($container_filename);
+				if ($this->use_cache)
+				{
+					$this->dump_container($config_cache);
+				}
 			}
 		}
 
-		$this->container->set('config.php', $this->config_php_file);
-
-		if ($this->compile_container)
+		if ($this->compile_container && $this->config_php_file)
 		{
-			$this->inject_dbal();
+			$this->container->set('config.php', $this->config_php_file);
 		}
 
 		return $this->container;
 	}
 
 	/**
-	* Set if the extensions should be used.
-	*
-	* @param bool $use_extensions
-	*/
-	public function set_use_extensions($use_extensions)
+	 * Enable the extensions.
+	 *
+	 * @param string $environment The environment to use
+	 * @return $this
+	 */
+	public function with_environment($environment)
+	{
+		$this->environment = $environment;
+
+		return $this;
+	}
+
+	/**
+	 * Enable the extensions.
+	 *
+	 * @return $this
+	 */
+	public function with_extensions()
 	{
-		$this->use_extensions = $use_extensions;
+		$this->use_extensions = true;
+
+		return $this;
 	}
 
 	/**
-	* Set if the phpBB compile pass have to be used.
-	*
-	* @param bool $use_custom_pass
-	*/
-	public function set_use_custom_pass($use_custom_pass)
+	 * Disable the extensions.
+	 *
+	 * @return $this
+	 */
+	public function without_extensions()
 	{
-		$this->use_custom_pass = $use_custom_pass;
+		$this->use_extensions = false;
+
+		return $this;
 	}
 
 	/**
-	* Set if the kernel compile pass have to be used.
-	*
-	* @param bool $use_kernel_pass
-	*/
-	public function set_use_kernel_pass($use_kernel_pass)
+	 * Enable the caching of the container.
+	 *
+	 * If DEBUG_CONTAINER is set this option is ignored and a new container is build.
+	 *
+	 * @return $this
+	 */
+	public function with_cache()
 	{
-		$this->use_kernel_pass = $use_kernel_pass;
+		$this->use_cache = true;
+
+		return $this;
 	}
 
 	/**
-	* Set if the php config file should be injecting into the container.
-	*
-	* @param bool $inject_config
-	*/
-	public function set_inject_config($inject_config)
+	 * Disable the caching of the container.
+	 *
+	 * @return $this
+	 */
+	public function without_cache()
 	{
-		$this->inject_config = $inject_config;
+		$this->use_cache = false;
+
+		return $this;
 	}
 
 	/**
-	* Set if a dump container should be used.
-	*
-	* If DEBUG_CONTAINER is set this option is ignored and a new container is build.
-	*
-	* @var bool $dump_container
-	*/
-	public function set_dump_container($dump_container)
+	 * Set the cache directory.
+	 *
+	 * @param string $cache_dir The cache directory.
+	 * @return $this
+	 */
+	public function with_cache_dir($cache_dir)
 	{
-		$this->dump_container = $dump_container;
+		$this->cache_dir = $cache_dir;
+
+		return $this;
 	}
 
 	/**
-	* Set if the container should be compiled automatically (default to true).
-	*
-	* @var bool $dump_container
-	*/
-	public function set_compile_container($compile_container)
+	 * Enable the compilation of the container.
+	 *
+	 * @return $this
+	 */
+	public function with_compiled_container()
 	{
-		$this->compile_container = $compile_container;
+		$this->compile_container = true;
+
+		return $this;
+	}
+
+	/**
+	 * Disable the compilation of the container.
+	 *
+	 * @return $this
+	 */
+	public function without_compiled_container()
+	{
+		$this->compile_container = false;
+
+		return $this;
 	}
 
 	/**
-	* Set a custom path to find the configuration of the container
-	*
-	* @param string $config_path
-	*/
-	public function set_config_path($config_path)
+	 * Set a custom path to find the configuration of the container.
+	 *
+	 * @param string $config_path
+	 * @return $this
+	 */
+	public function with_config_path($config_path)
 	{
 		$this->config_path = $config_path;
+
+		return $this;
 	}
 
 	/**
-	* Set custom parameters to inject into the container.
-	*
-	* @param array $custom_parameters
-	*/
-	public function set_custom_parameters($custom_parameters)
+	 * Set custom parameters to inject into the container.
+	 *
+	 * @param array $custom_parameters
+	 * @return $this
+	 */
+	public function with_custom_parameters($custom_parameters)
 	{
 		$this->custom_parameters = $custom_parameters;
+
+		return $this;
 	}
 
 	/**
-	* Dump the container to the disk.
-	*
-	* @param string $container_filename The name of the file.
-	*/
-	protected function dump_container($container_filename)
+	 * Set custom parameters to inject into the container.
+	 *
+	 * @param \phpbb\config_php_file $config_php_file
+	 * @return $this
+	 */
+	public function with_config(\phpbb\config_php_file $config_php_file)
 	{
-		$dumper = new PhpDumper($this->container);
-		$cached_container_dump = $dumper->dump(array(
-			'class'         => 'phpbb_cache_container',
-			'base_class'    => 'Symfony\\Component\\DependencyInjection\\ContainerBuilder',
-		));
+		$this->config_php_file = $config_php_file;
 
-		file_put_contents($container_filename, $cached_container_dump);
+		return $this;
 	}
 
 	/**
-	* Inject the connection into the container if one was opened.
-	*/
-	protected function inject_dbal()
+	 * Returns the path to the container configuration (default: root_path/config)
+	 *
+	 * @return string
+	 */
+	protected function get_config_path()
 	{
-		if ($this->dbal_connection !== null)
-		{
-			$this->container->get('dbal.conn')->set_driver($this->dbal_connection);
-		}
+		return $this->config_path ?: $this->phpbb_root_path . 'config';
 	}
 
 	/**
-	* Get DB connection.
-	*
-	* @return \phpbb\db\driver\driver_interface
-	*/
-	protected function get_dbal_connection()
+	 * Returns the path to the cache directory (default: root_path/cache/environment).
+	 *
+	 * @return string Path to the cache directory.
+	 */
+	protected function get_cache_dir()
 	{
-		if ($this->dbal_connection === null)
-		{
-			$dbal_driver_class = $this->config_php_file->convert_30_dbms_to_31($this->config_php_file->get('dbms'));
-			$this->dbal_connection = new $dbal_driver_class();
-			$this->dbal_connection->sql_connect(
-				$this->config_php_file->get('dbhost'),
-				$this->config_php_file->get('dbuser'),
-				$this->config_php_file->get('dbpasswd'),
-				$this->config_php_file->get('dbname'),
-				$this->config_php_file->get('dbport'),
-				defined('PHPBB_DB_NEW_LINK') && PHPBB_DB_NEW_LINK
-			);
-		}
-
-		return $this->dbal_connection;
+		return $this->cache_dir ?: $this->phpbb_root_path . 'cache/' . $this->get_environment() . '/';
 	}
 
 	/**
-	* Get enabled extensions.
-	*
-	* @return array enabled extensions
-	*/
-	protected function get_installed_extensions()
+	 * Load the enabled extensions.
+	 */
+	protected function load_extensions()
 	{
-		$db = $this->get_dbal_connection();
-		$extension_table = $this->config_php_file->get('table_prefix') . 'ext';
+		if ($this->config_php_file !== null)
+		{
+			// Build an intermediate container to load the ext list from the database
+			$container_builder = new container_builder($this->phpbb_root_path, $this->php_ext);
+			$ext_container = $container_builder
+				->without_cache()
+				->without_extensions()
+				->with_config($this->config_php_file)
+				->with_environment('production')
+				->without_compiled_container()
+				->get_container()
+			;
+
+			$ext_container->register('cache.driver', '\\phpbb\\cache\\driver\\dummy');
+			$ext_container->compile();
+
+			$extensions = $ext_container->get('ext.manager')->all_enabled();
+
+			// Load each extension found
+			foreach ($extensions as $ext_name => $path)
+			{
+				$extension_class = '\\' . str_replace('/', '\\', $ext_name) . '\\di\\extension';
 
-		$sql = 'SELECT *
-			FROM ' . $extension_table . '
-			WHERE ext_active = 1';
+				if (!class_exists($extension_class))
+				{
+					$extension_class = '\\phpbb\\extension\\di\\extension_base';
+				}
 
-		$result = $db->sql_query($sql);
-		$rows = $db->sql_fetchrowset($result);
-		$db->sql_freeresult($result);
+				$this->container_extensions[] = new $extension_class($ext_name, $path);
 
-		$exts = array();
-		foreach ($rows as $row)
+				// Load extension autoloader
+				$filename = $path . 'vendor/autoload.php';
+				if (file_exists($filename))
+				{
+					require $filename;
+				}
+			}
+		}
+		else
 		{
-			$exts[$row['ext_name']] = $this->phpbb_root_path . 'ext/' . $row['ext_name'] . '/';
+			// To load the extensions we need the database credentials.
+			// Automatically disable the extensions if we don't have them.
+			$this->use_extensions = false;
 		}
+	}
+
+	/**
+	 * Dump the container to the disk.
+	 *
+	 * @param ConfigCache $cache The config cache
+	 */
+	protected function dump_container($cache)
+	{
+		try
+		{
+			$dumper                = new PhpDumper($this->container);
+			$cached_container_dump = $dumper->dump(array(
+				'class'      => 'phpbb_cache_container',
+				'base_class' => 'Symfony\\Component\\DependencyInjection\\ContainerBuilder',
+			));
 
-		return $exts;
+			$cache->write($cached_container_dump, $this->container->getResources());
+		}
+		catch (IOException $e)
+		{
+			// Don't fail if the cache isn't writeable
+		}
 	}
 
 	/**
-	* Create the ContainerBuilder object
-	*
-	* @param array $extensions Array of Container extension objects
-	* @return ContainerBuilder object
-	*/
+	 * Create the ContainerBuilder object
+	 *
+	 * @param array $extensions Array of Container extension objects
+	 * @return ContainerBuilder object
+	 */
 	protected function create_container(array $extensions)
 	{
-		$container = new ContainerBuilder();
+		$container = new ContainerBuilder(new ParameterBag($this->get_core_parameters()));
+
+		$extensions_alias = array();
 
 		foreach ($extensions as $extension)
 		{
 			$container->registerExtension($extension);
-			$container->loadFromExtension($extension->getAlias());
+			$extensions_alias[] = $extension->getAlias();
 		}
 
+		$container->getCompilerPassConfig()->setMergePass(new MergeExtensionConfigurationPass($extensions_alias));
+
 		return $container;
 	}
 
 	/**
-	* Inject the customs parameters into the container
-	*/
+	 * Inject the customs parameters into the container
+	 */
 	protected function inject_custom_parameters()
 	{
-		if ($this->custom_parameters === null)
+		if ($this->custom_parameters !== null)
 		{
-			$this->custom_parameters = array(
-				'core.root_path' => $this->phpbb_root_path,
-				'core.php_ext' => $this->php_ext,
-			);
+			foreach ($this->custom_parameters as $key => $value)
+			{
+				$this->container->setParameter($key, $value);
+			}
 		}
+	}
 
-		foreach ($this->custom_parameters as $key => $value)
+	/**
+	 * Returns the core parameters.
+	 *
+	 * @return array An array of core parameters
+	 */
+	protected function get_core_parameters()
+	{
+		return array_merge(
+			array(
+				'core.root_path'     => $this->phpbb_root_path,
+				'core.php_ext'       => $this->php_ext,
+				'core.environment'   => $this->get_environment(),
+				'core.debug'         => DEBUG,
+			),
+			$this->get_env_parameters()
+		);
+	}
+
+	/**
+	 * Gets the environment parameters.
+	 *
+	 * Only the parameters starting with "PHPBB__" are considered.
+	 *
+	 * @return array An array of parameters
+	 */
+	protected function get_env_parameters()
+	{
+		$parameters = array();
+		foreach ($_SERVER as $key => $value)
 		{
-			$this->container->setParameter($key, $value);
+			if (0 === strpos($key, 'PHPBB__'))
+			{
+				$parameters[strtolower(str_replace('__', '.', substr($key, 9)))] = $value;
+			}
 		}
+
+		return $parameters;
 	}
 
 	/**
-	* Get the filename under which the dumped container will be stored.
-	*
-	* @return string Path for dumped container
-	*/
+	 * Get the filename under which the dumped container will be stored.
+	 *
+	 * @return string Path for dumped container
+	 */
 	protected function get_container_filename()
 	{
 		$filename = str_replace(array('/', '.'), array('slash', 'dot'), $this->phpbb_root_path);
-		return $this->phpbb_root_path . 'cache/container_' . $filename . '.' . $this->php_ext;
+		return $this->get_cache_dir() . 'container_' . $filename . '.' . $this->php_ext;
+	}
+
+	/**
+	 * Return the name of the current environment.
+	 *
+	 * @return string
+	 */
+	protected function get_environment()
+	{
+		return $this->environment ?: PHPBB_ENVIRONMENT;
 	}
 }
diff --git a/phpBB/phpbb/di/extension/container_configuration.php b/phpBB/phpbb/di/extension/container_configuration.php
new file mode 100644
index 0000000000..4cc7c7c0d1
--- /dev/null
+++ b/phpBB/phpbb/di/extension/container_configuration.php
@@ -0,0 +1,46 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\di\extension;
+
+use Symfony\Component\Config\Definition\Builder\TreeBuilder;
+use Symfony\Component\Config\Definition\ConfigurationInterface;
+
+class container_configuration implements ConfigurationInterface
+{
+
+	/**
+	 * Generates the configuration tree builder.
+	 *
+	 * @return \Symfony\Component\Config\Definition\Builder\TreeBuilder The tree builder
+	 */
+	public function getConfigTreeBuilder()
+	{
+		$treeBuilder = new TreeBuilder();
+		$rootNode = $treeBuilder->root('core');
+		$rootNode
+			->children()
+				->booleanNode('require_dev_dependencies')->defaultValue(false)->end()
+				->arrayNode('twig')
+					->addDefaultsIfNotSet()
+					->children()
+						->booleanNode('debug')->defaultValue(null)->end()
+						->booleanNode('auto_reload')->defaultValue(null)->end()
+						->booleanNode('enable_debug_extension')->defaultValue(false)->end()
+					->end()
+				->end()
+			->end()
+		;
+		return $treeBuilder;
+	}
+}
diff --git a/phpBB/phpbb/di/extension/core.php b/phpBB/phpbb/di/extension/core.php
index ca4fa5c082..91b321a684 100644
--- a/phpBB/phpbb/di/extension/core.php
+++ b/phpBB/phpbb/di/extension/core.php
@@ -13,10 +13,11 @@
 
 namespace phpbb\di\extension;
 
+use Symfony\Component\Config\FileLocator;
+use Symfony\Component\Config\Resource\FileResource;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
-use Symfony\Component\HttpKernel\DependencyInjection\Extension;
 use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
-use Symfony\Component\Config\FileLocator;
+use Symfony\Component\HttpKernel\DependencyInjection\Extension;
 
 /**
 * Container core extension
@@ -24,42 +25,89 @@ use Symfony\Component\Config\FileLocator;
 class core extends Extension
 {
 	/**
-	* Config path
-	* @var string
-	*/
+	 * Config path
+	 * @var string
+	 */
 	protected $config_path;
 
 	/**
-	* Constructor
-	*
-	* @param string $config_path Config path
-	*/
+	 * Constructor
+	 *
+	 * @param string $config_path Config path
+	 */
 	public function __construct($config_path)
 	{
 		$this->config_path = $config_path;
 	}
 
 	/**
-	* Loads a specific configuration.
-	*
-	* @param array            $config    An array of configuration values
-	* @param ContainerBuilder $container A ContainerBuilder instance
-	*
-	* @throws \InvalidArgumentException When provided tag is not defined in this extension
-	*/
-	public function load(array $config, ContainerBuilder $container)
+	 * Loads a specific configuration.
+	 *
+	 * @param array            $configs   An array of configuration values
+	 * @param ContainerBuilder $container A ContainerBuilder instance
+	 *
+	 * @throws \InvalidArgumentException When provided tag is not defined in this extension
+	 */
+	public function load(array $configs, ContainerBuilder $container)
 	{
-		$loader = new YamlFileLoader($container, new FileLocator(phpbb_realpath($this->config_path)));
-		$loader->load('services.yml');
+		$filesystem = new \phpbb\filesystem\filesystem();
+		$loader = new YamlFileLoader($container, new FileLocator($filesystem->realpath($this->config_path)));
+		$loader->load($container->getParameter('core.environment') . '/container/environment.yml');
+
+		$config = $this->getConfiguration($configs, $container);
+		$config = $this->processConfiguration($config, $configs);
+
+		if ($config['require_dev_dependencies'])
+		{
+			if (!class_exists('Goutte\Client', true))
+			{
+				trigger_error(
+					'Composer development dependencies have not been set up for the ' . $container->getParameter('core.environment') . ' environment yet, run ' .
+					"'php ../composer.phar install --dev' from the phpBB directory to do so.",
+					E_USER_ERROR
+				);
+			}
+		}
+
+		// Set the Twig options if defined in the environment
+		$definition = $container->getDefinition('template.twig.environment');
+		$twig_environment_options = $definition->getArgument(7);
+		if ($config['twig']['debug'])
+		{
+			$twig_environment_options['debug'] = true;
+		}
+		if ($config['twig']['auto_reload'])
+		{
+			$twig_environment_options['auto_reload'] = true;
+		}
+		// Replace the 8th argument, the options passed to the environment
+		$definition->replaceArgument(7, $twig_environment_options);
+
+		if ($config['twig']['enable_debug_extension'])
+		{
+			$definition = $container->getDefinition('template.twig.extensions.debug');
+			$definition->addTag('twig.extension');
+		}
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function getConfiguration(array $config, ContainerBuilder $container)
+	{
+		$r = new \ReflectionClass('\phpbb\di\extension\container_configuration');
+		$container->addResource(new FileResource($r->getFileName()));
+
+		return new container_configuration();
 	}
 
 	/**
-	* Returns the recommended alias to use in XML.
-	*
-	* This alias is also the mandatory prefix to use when using YAML.
-	*
-	* @return string The alias
-	*/
+	 * Returns the recommended alias to use in XML.
+	 *
+	 * This alias is also the mandatory prefix to use when using YAML.
+	 *
+	 * @return string The alias
+	 */
 	public function getAlias()
 	{
 		return 'core';
diff --git a/phpBB/phpbb/di/extension/ext.php b/phpBB/phpbb/di/extension/ext.php
deleted file mode 100644
index 718c992d2e..0000000000
--- a/phpBB/phpbb/di/extension/ext.php
+++ /dev/null
@@ -1,67 +0,0 @@
-<?php
-/**
-*
-* This file is part of the phpBB Forum Software package.
-*
-* @copyright (c) phpBB Limited <https://www.phpbb.com>
-* @license GNU General Public License, version 2 (GPL-2.0)
-*
-* For full copyright and license information, please see
-* the docs/CREDITS.txt file.
-*
-*/
-
-namespace phpbb\di\extension;
-
-use Symfony\Component\DependencyInjection\ContainerBuilder;
-use Symfony\Component\HttpKernel\DependencyInjection\Extension;
-use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
-use Symfony\Component\Config\FileLocator;
-
-/**
-* Container ext extension
-*/
-class ext extends Extension
-{
-	protected $paths = array();
-
-	public function __construct($enabled_extensions)
-	{
-		foreach ($enabled_extensions as $ext => $path)
-		{
-			$this->paths[] = $path;
-		}
-	}
-
-	/**
-	* Loads a specific configuration.
-	*
-	* @param array            $config    An array of configuration values
-	* @param ContainerBuilder $container A ContainerBuilder instance
-	*
-	* @throws \InvalidArgumentException When provided tag is not defined in this extension
-	*/
-	public function load(array $config, ContainerBuilder $container)
-	{
-		foreach ($this->paths as $path)
-		{
-			if (file_exists($path . '/config/services.yml'))
-			{
-				$loader = new YamlFileLoader($container, new FileLocator(phpbb_realpath($path . '/config')));
-				$loader->load('services.yml');
-			}
-		}
-	}
-
-	/**
-	* Returns the recommended alias to use in XML.
-	*
-	* This alias is also the mandatory prefix to use when using YAML.
-	*
-	* @return string The alias
-	*/
-	public function getAlias()
-	{
-		return 'ext';
-	}
-}