4 files changed, 81 insertions, 30 deletions
diff --git a/phpBB/config/services.yml b/phpBB/config/services.yml
index a9f9f5ed19..8caf1af683 100644
--- a/phpBB/config/services.yml
+++ b/phpBB/config/services.yml
@@ -10,6 +10,7 @@ imports:
     - { resource: mimetype_guessers.yml }
     - { resource: passwords.yml }
     - { resource: profilefields.yml }
+    - { resource: twig.yml }
 
 services:
     acl.permissions:
@@ -339,6 +340,9 @@ services:
             - @config
             - @user
             - @template_context
+            - @template.twig.environment
+            - %core.template.cache_path%
+            - @template.twig.extensions.collection
             - @ext.manager
 
     template_context:
diff --git a/phpBB/config/twig.yml b/phpBB/config/twig.yml
new file mode 100644
index 0000000000..eb3e6c0924
--- /dev/null
+++ b/phpBB/config/twig.yml
@@ -0,0 +1,36 @@
+parameters:
+    core.template.cache_path: %core.root_path%cache/twig/
+
+services:
+    template.twig.environment:
+        class: phpbb\template\twig\environment
+        arguments:
+            - @config
+            - @path_helper
+            - @service_container
+            - %core.template.cache_path%
+            - @ext.manager
+            - @template.twig.loader
+
+    template.twig.lexer:
+        class: phpbb\template\twig\lexer
+        arguments:
+            - @template.twig.environment
+
+    template.twig.loader:
+        class: phpbb\template\twig\loader
+
+    template.twig.extensions.collection:
+        class: phpbb\di\service_collection
+        arguments:
+            - @service_container
+        tags:
+            - { name: service_collection, tag: twig.extension }
+
+    template.twig.extensions.phpbb:
+        class: phpbb\template\twig\extension
+        arguments:
+            - @template_context
+            - @user
+        tags:
+            - { name: twig.extension }
diff --git a/phpBB/phpbb/template/twig/environment.php b/phpBB/phpbb/template/twig/environment.php
index 476ffd935e..f6d9b73178 100644
--- a/phpBB/phpbb/template/twig/environment.php
+++ b/phpBB/phpbb/template/twig/environment.php
@@ -13,6 +13,9 @@
 
 namespace phpbb\template\twig;
 
+use Twig_Lexer;
+use Twig_LexerInterface;
+
 class environment extends \Twig_Environment
 {
 	/** @var \phpbb\config\config */
@@ -21,6 +24,9 @@ class environment extends \Twig_Environment
 	/** @var \phpbb\path_helper */
 	protected $phpbb_path_helper;
 
+	/** @var \Symfony\Component\DependencyInjection\ContainerInterface */
+	protected $container;
+
 	/** @var \phpbb\extension\manager */
 	protected $extension_manager;
 
@@ -38,24 +44,48 @@ class environment extends \Twig_Environment
 	*
 	* @param \phpbb\config\config $phpbb_config The phpBB configuration
 	* @param \phpbb\path_helper $path_helper phpBB path helper
+	* @param \Symfony\Component\DependencyInjection\ContainerInterface $container The dependency injection container
+	* @param string $cache_path The path to the cache directory
 	* @param \phpbb\extension\manager $extension_manager phpBB extension manager
 	* @param \Twig_LoaderInterface $loader Twig loader interface
 	* @param array $options Array of options to pass to Twig
 	*/
-	public function __construct($phpbb_config, \phpbb\path_helper $path_helper, \phpbb\extension\manager $extension_manager = null, \Twig_LoaderInterface $loader = null, $options = array())
+	public function __construct($phpbb_config, \phpbb\path_helper $path_helper, \Symfony\Component\DependencyInjection\ContainerInterface $container, $cache_path, \phpbb\extension\manager $extension_manager = null, \Twig_LoaderInterface $loader = null, $options = array())
 	{
 		$this->phpbb_config = $phpbb_config;
 
 		$this->phpbb_path_helper = $path_helper;
 		$this->extension_manager = $extension_manager;
+		$this->container = $container;
 
 		$this->phpbb_root_path = $this->phpbb_path_helper->get_phpbb_root_path();
 		$this->web_root_path = $this->phpbb_path_helper->get_web_root_path();
 
+		$options = array_merge(array(
+			'cache'			=> (defined('IN_INSTALL')) ? false : $cache_path,
+			'debug'			=> defined('DEBUG'),
+			'auto_reload'	=> (bool) $this->phpbb_config['load_tplcompile'],
+			'autoescape'	=> false,
+		), $options);
+
 		return parent::__construct($loader, $options);
 	}
 
 	/**
+	* {@inheritdoc}
+	*/
+	public function getLexer()
+	{
+		if (null === $this->lexer)
+		{
+			$this->lexer = $this->container->get('template.twig.lexer');
+		}
+
+		return $this->lexer;
+	}
+
+
+	/**
 	* Get the list of enabled phpBB extensions
 	*
 	* Used in EVENT node
diff --git a/phpBB/phpbb/template/twig/twig.php b/phpBB/phpbb/template/twig/twig.php
index 5e2057f818..dd6117819a 100644
--- a/phpBB/phpbb/template/twig/twig.php
+++ b/phpBB/phpbb/template/twig/twig.php
@@ -78,9 +78,12 @@ class twig extends \phpbb\template\base
 	* @param \phpbb\config\config $config
 	* @param \phpbb\user $user
 	* @param \phpbb\template\context $context template context
+	* @param \phpbb\template\twig\environment $twig_environment
+	* @param string $cache_path
+	* @param array|\ArrayAccess $extensions
 	* @param \phpbb\extension\manager $extension_manager extension manager, if null then template events will not be invoked
 	*/
-	public function __construct(\phpbb\path_helper $path_helper, $config, $user, \phpbb\template\context $context, \phpbb\extension\manager $extension_manager = null)
+	public function __construct(\phpbb\path_helper $path_helper, $config, $user, \phpbb\template\context $context, \phpbb\template\twig\environment $twig_environment, $cache_path, $extensions = array(), \phpbb\extension\manager $extension_manager = null)
 	{
 		$this->path_helper = $path_helper;
 		$this->phpbb_root_path = $path_helper->get_phpbb_root_path();
@@ -89,35 +92,13 @@ class twig extends \phpbb\template\base
 		$this->user = $user;
 		$this->context = $context;
 		$this->extension_manager = $extension_manager;
+		$this->cachepath = $cache_path;
+		$this->twig = $twig_environment;
 
-		$this->cachepath = $this->phpbb_root_path . 'cache/twig/';
-
-		// Initiate the loader, __main__ namespace paths will be setup later in set_style_names()
-		$loader = new \phpbb\template\twig\loader('');
-
-		$this->twig = new \phpbb\template\twig\environment(
-			$this->config,
-			$this->path_helper,
-			$this->extension_manager,
-			$loader,
-			array(
-				'cache'			=> (defined('IN_INSTALL')) ? false : $this->cachepath,
-				'debug'			=> defined('DEBUG'),
-				'auto_reload'	=> (bool) $this->config['load_tplcompile'],
-				'autoescape'	=> false,
-			)
-		);
-
-		$this->twig->addExtension(
-			new \phpbb\template\twig\extension(
-				$this->context,
-				$this->user
-			)
-		);
-
-		$lexer = new \phpbb\template\twig\lexer($this->twig);
-
-		$this->twig->setLexer($lexer);
+		foreach ($extensions as $extension)
+		{
+			$this->twig->addExtension($extension);
+		}
 
 		// Add admin namespace
 		if ($this->path_helper->get_adm_relative_path() !== null && is_dir($this->phpbb_root_path . $this->path_helper->get_adm_relative_path() . 'style/'))