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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/Cache/Filesystem.php

@@ -0,0 +1,96 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2015 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Implements a cache on the filesystem.
+ *
+ * @author Andrew Tch <andrew@noop.lv>
+ */
+class Twig_Cache_Filesystem implements Twig_CacheInterface
+{
+    const FORCE_BYTECODE_INVALIDATION = 1;
+
+    private $directory;
+    private $options;
+
+    /**
+     * @param $directory string The root cache directory
+     * @param $options   int    A set of options
+     */
+    public function __construct($directory, $options = 0)
+    {
+        $this->directory = $directory;
+        $this->options = $options;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function generateKey($name, $className)
+    {
+        $hash = hash('sha256', $className);
+
+        return $this->directory.'/'.$hash[0].$hash[1].'/'.$hash.'.php';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function load($key)
+    {
+        @include_once $key;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function write($key, $content)
+    {
+        $dir = dirname($key);
+        if (!is_dir($dir)) {
+            if (false === @mkdir($dir, 0777, true) && !is_dir($dir)) {
+                throw new RuntimeException(sprintf('Unable to create the cache directory (%s).', $dir));
+            }
+        } elseif (!is_writable($dir)) {
+            throw new RuntimeException(sprintf('Unable to write in the cache directory (%s).', $dir));
+        }
+
+        $tmpFile = tempnam($dir, basename($key));
+        if (false !== @file_put_contents($tmpFile, $content) && @rename($tmpFile, $key)) {
+            @chmod($key, 0666 & ~umask());
+
+            if (self::FORCE_BYTECODE_INVALIDATION == ($this->options & self::FORCE_BYTECODE_INVALIDATION)) {
+                // Compile cached file into bytecode cache
+                if (function_exists('opcache_invalidate')) {
+                    opcache_invalidate($key, true);
+                } elseif (function_exists('apc_compile_file')) {
+                    apc_compile_file($key);
+                }
+            }
+
+            return;
+        }
+
+        throw new RuntimeException(sprintf('Failed to write cache file "%s".', $key));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getTimestamp($key)
+    {
+        if (!file_exists($key)) {
+            return 0;
+        }
+
+        return (int) @filemtime($key);
+    }
+}

Twig/Cache/Null.php

@@ -0,0 +1,48 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2015 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Implements a no-cache strategy.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Cache_Null implements Twig_CacheInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function generateKey($name, $className)
+    {
+        return '';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function write($key, $content)
+    {
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function load($key)
+    {
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getTimestamp($key)
+    {
+        return 0;
+    }
+}