* fixed Twig loading on case-sensitive systems

system/libs/Twig/Loader/Filesystem.php

@@ -0,0 +1,240 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Loads template from the filesystem.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Loader_Filesystem implements Twig_LoaderInterface, Twig_ExistsLoaderInterface
+{
+    /** Identifier of the main namespace. */
+    const MAIN_NAMESPACE = '__main__';
+
+    protected $paths = array();
+    protected $cache = array();
+
+    /**
+     * Constructor.
+     *
+     * @param string|array $paths A path or an array of paths where to look for templates
+     */
+    public function __construct($paths = array())
+    {
+        if ($paths) {
+            $this->setPaths($paths);
+        }
+    }
+
+    /**
+     * Returns the paths to the templates.
+     *
+     * @param string $namespace A path namespace
+     *
+     * @return array The array of paths where to look for templates
+     */
+    public function getPaths($namespace = self::MAIN_NAMESPACE)
+    {
+        return isset($this->paths[$namespace]) ? $this->paths[$namespace] : array();
+    }
+
+    /**
+     * Returns the path namespaces.
+     *
+     * The main namespace is always defined.
+     *
+     * @return array The array of defined namespaces
+     */
+    public function getNamespaces()
+    {
+        return array_keys($this->paths);
+    }
+
+    /**
+     * Sets the paths where templates are stored.
+     *
+     * @param string|array $paths     A path or an array of paths where to look for templates
+     * @param string       $namespace A path namespace
+     */
+    public function setPaths($paths, $namespace = self::MAIN_NAMESPACE)
+    {
+        if (!is_array($paths)) {
+            $paths = array($paths);
+        }
+
+        $this->paths[$namespace] = array();
+        foreach ($paths as $path) {
+            $this->addPath($path, $namespace);
+        }
+    }
+
+    /**
+     * Adds a path where templates are stored.
+     *
+     * @param string $path      A path where to look for templates
+     * @param string $namespace A path name
+     *
+     * @throws Twig_Error_Loader
+     */
+    public function addPath($path, $namespace = self::MAIN_NAMESPACE)
+    {
+        // invalidate the cache
+        $this->cache = array();
+
+        if (!is_dir($path)) {
+            throw new Twig_Error_Loader(sprintf('The "%s" directory does not exist.', $path));
+        }
+
+        $this->paths[$namespace][] = rtrim($path, '/\\');
+    }
+
+    /**
+     * Prepends a path where templates are stored.
+     *
+     * @param string $path      A path where to look for templates
+     * @param string $namespace A path name
+     *
+     * @throws Twig_Error_Loader
+     */
+    public function prependPath($path, $namespace = self::MAIN_NAMESPACE)
+    {
+        // invalidate the cache
+        $this->cache = array();
+
+        if (!is_dir($path)) {
+            throw new Twig_Error_Loader(sprintf('The "%s" directory does not exist.', $path));
+        }
+
+        $path = rtrim($path, '/\\');
+
+        if (!isset($this->paths[$namespace])) {
+            $this->paths[$namespace][] = $path;
+        } else {
+            array_unshift($this->paths[$namespace], $path);
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getSource($name)
+    {
+        return file_get_contents($this->findTemplate($name));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getCacheKey($name)
+    {
+        return $this->findTemplate($name);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function exists($name)
+    {
+        $name = $this->normalizeName($name);
+
+        if (isset($this->cache[$name])) {
+            return true;
+        }
+
+        try {
+            $this->findTemplate($name);
+
+            return true;
+        } catch (Twig_Error_Loader $exception) {
+            return false;
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isFresh($name, $time)
+    {
+        return filemtime($this->findTemplate($name)) <= $time;
+    }
+
+    protected function findTemplate($name)
+    {
+        $name = $this->normalizeName($name);
+
+        if (isset($this->cache[$name])) {
+            return $this->cache[$name];
+        }
+
+        $this->validateName($name);
+
+        list($namespace, $shortname) = $this->parseName($name);
+
+        if (!isset($this->paths[$namespace])) {
+            throw new Twig_Error_Loader(sprintf('There are no registered paths for namespace "%s".', $namespace));
+        }
+
+        foreach ($this->paths[$namespace] as $path) {
+            if (is_file($path.'/'.$shortname)) {
+                if (false !== $realpath = realpath($path.'/'.$shortname)) {
+                    return $this->cache[$name] = $realpath;
+                }
+
+                return $this->cache[$name] = $path.'/'.$shortname;
+            }
+        }
+
+        throw new Twig_Error_Loader(sprintf('Unable to find template "%s" (looked into: %s).', $name, implode(', ', $this->paths[$namespace])));
+    }
+
+    protected function parseName($name, $default = self::MAIN_NAMESPACE)
+    {
+        if (isset($name[0]) && '@' == $name[0]) {
+            if (false === $pos = strpos($name, '/')) {
+                throw new Twig_Error_Loader(sprintf('Malformed namespaced template name "%s" (expecting "@namespace/template_name").', $name));
+            }
+
+            $namespace = substr($name, 1, $pos - 1);
+            $shortname = substr($name, $pos + 1);
+
+            return array($namespace, $shortname);
+        }
+
+        return array($default, $name);
+    }
+
+    protected function normalizeName($name)
+    {
+        return preg_replace('#/{2,}#', '/', strtr((string) $name, '\\', '/'));
+    }
+
+    protected function validateName($name)
+    {
+        if (false !== strpos($name, "\0")) {
+            throw new Twig_Error_Loader('A template name cannot contain NUL bytes.');
+        }
+
+        $name = ltrim($name, '/');
+        $parts = explode('/', $name);
+        $level = 0;
+        foreach ($parts as $part) {
+            if ('..' === $part) {
+                --$level;
+            } elseif ('.' !== $part) {
+                ++$level;
+            }
+
+            if ($level < 0) {
+                throw new Twig_Error_Loader(sprintf('Looks like you try to load a template outside configured directories (%s).', $name));
+            }
+        }
+    }
+}