Start working

Modified some paths to be more generic and not require rewrite.  Some
instances of phase names have been changed, others are still in process.

Twig/Util/DeprecationCollector.php

@@ -0,0 +1,82 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Util_DeprecationCollector
+{
+    private $twig;
+    private $deprecations;
+
+    public function __construct(Twig_Environment $twig)
+    {
+        $this->twig = $twig;
+    }
+
+    /**
+     * Returns deprecations for templates contained in a directory.
+     *
+     * @param string $dir A directory where templates are stored
+     * @param string $ext Limit the loaded templates by extension
+     *
+     * @return array() An array of deprecations
+     */
+    public function collectDir($dir, $ext = '.twig')
+    {
+        $iterator = new RegexIterator(
+            new RecursiveIteratorIterator(
+                new RecursiveDirectoryIterator($dir), RecursiveIteratorIterator::LEAVES_ONLY
+            ), '{'.preg_quote($ext).'$}'
+        );
+
+        return $this->collect(new Twig_Util_TemplateDirIterator($iterator));
+    }
+
+    /**
+     * Returns deprecations for passed templates.
+     *
+     * @param Iterator $iterator An iterator of templates (where keys are template names and values the contents of the template)
+     *
+     * @return array() An array of deprecations
+     */
+    public function collect(Iterator $iterator)
+    {
+        $this->deprecations = array();
+
+        set_error_handler(array($this, 'errorHandler'));
+
+        foreach ($iterator as $name => $contents) {
+            try {
+                $this->twig->parse($this->twig->tokenize($contents, $name));
+            } catch (Twig_Error_Syntax $e) {
+                // ignore templates containing syntax errors
+            }
+        }
+
+        restore_error_handler();
+
+        $deprecations = $this->deprecations;
+        $this->deprecations = array();
+
+        return $deprecations;
+    }
+
+    /**
+     * @internal
+     */
+    public function errorHandler($type, $msg)
+    {
+        if (E_USER_DEPRECATED === $type) {
+            $this->deprecations[] = $msg;
+        }
+    }
+}