diff -r 000000000000 -r 7f95f8617b0b vendor/assetic/src/Assetic/Asset/AssetCollection.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/assetic/src/Assetic/Asset/AssetCollection.php	Sat Sep 24 15:40:41 2011 +0200
@@ -0,0 +1,327 @@
+<?php
+
+/*
+ * This file is part of the Assetic package, an OpenSky project.
+ *
+ * (c) 2010-2011 OpenSky Project Inc
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Assetic\Asset;
+
+use Assetic\Filter\FilterCollection;
+use Assetic\Filter\FilterInterface;
+
+/**
+ * A collection of assets.
+ *
+ * @author Kris Wallsmith <kris.wallsmith@gmail.com>
+ */
+class AssetCollection implements AssetInterface, \IteratorAggregate
+{
+    private $assets;
+    private $filters;
+    private $sourceRoot;
+    private $targetPath;
+    private $content;
+    private $clones;
+
+    /**
+     * Constructor.
+     *
+     * @param array  $assets     Assets for the current collection
+     * @param array  $filters    Filters for the current collection
+     * @param string $sourceRoot The root directory
+     */
+    public function __construct($assets = array(), $filters = array(), $sourceRoot = null)
+    {
+        $this->assets = array();
+        foreach ($assets as $asset) {
+            $this->add($asset);
+        }
+
+        $this->filters = new FilterCollection($filters);
+        $this->sourceRoot = $sourceRoot;
+        $this->clones = new \SplObjectStorage();
+    }
+
+    /**
+     * Adds an asset to the current collection.
+     *
+     * @param AssetInterface $asset An asset
+     */
+    public function add(AssetInterface $asset)
+    {
+        $this->assets[] = $asset;
+    }
+
+    public function all()
+    {
+        return $this->assets;
+    }
+
+    public function ensureFilter(FilterInterface $filter)
+    {
+        $this->filters->ensure($filter);
+    }
+
+    public function getFilters()
+    {
+        return $this->filters->all();
+    }
+
+    public function clearFilters()
+    {
+        $this->filters->clear();
+    }
+
+    public function load(FilterInterface $additionalFilter = null)
+    {
+        // loop through leaves and load each asset
+        $parts = array();
+        foreach ($this as $asset) {
+            $asset->load($additionalFilter);
+            $parts[] = $asset->getContent();
+        }
+
+        $this->content = implode("\n", $parts);
+    }
+
+    public function dump(FilterInterface $additionalFilter = null)
+    {
+        // loop through leaves and dump each asset
+        $parts = array();
+        foreach ($this as $asset) {
+            $parts[] = $asset->dump($additionalFilter);
+        }
+
+        return implode("\n", $parts);
+    }
+
+    public function getContent()
+    {
+        return $this->content;
+    }
+
+    public function setContent($content)
+    {
+        $this->content = $content;
+    }
+
+    public function getSourceRoot()
+    {
+        return $this->sourceRoot;
+    }
+
+    public function getSourcePath()
+    {
+    }
+
+    public function getTargetPath()
+    {
+        return $this->targetPath;
+    }
+
+    public function setTargetPath($targetPath)
+    {
+        $this->targetPath = $targetPath;
+    }
+
+    /**
+     * Returns the highest last-modified value of all assets in the current collection.
+     *
+     * @return integer|null A UNIX timestamp
+     */
+    public function getLastModified()
+    {
+        if (!count($this->assets)) {
+            return;
+        }
+
+        $mapper = function (AssetInterface $asset)
+        {
+            return $asset->getLastModified();
+        };
+
+        return max(array_map($mapper, $this->assets));
+    }
+
+    /**
+     * Returns an iterator for looping recursively over unique leaves.
+     */
+    public function getIterator()
+    {
+        return new \RecursiveIteratorIterator(new AssetCollectionFilterIterator(new AssetCollectionIterator($this, $this->clones)));
+    }
+}
+
+/**
+ * Asset collection filter iterator.
+ *
+ * The filter iterator is responsible for de-duplication of leaf assets based
+ * on both strict equality and source URL.
+ *
+ * @author Kris Wallsmith <kris.wallsmith@gmail.com>
+ * @access private
+ */
+class AssetCollectionFilterIterator extends \RecursiveFilterIterator
+{
+    private $visited;
+    private $sources;
+
+    /**
+     * Constructor.
+     *
+     * @param AssetCollectionIterator $iterator The inner iterator
+     * @param array                   $visited  An array of visited asset objects
+     * @param array                   $sources  An array of visited source strings
+     */
+    public function __construct(AssetCollectionIterator $iterator, array $visited = array(), array $sources = array())
+    {
+        parent::__construct($iterator);
+
+        $this->visited = $visited;
+        $this->sources = $sources;
+    }
+
+    /**
+     * Determines whether the current asset is a duplicate.
+     *
+     * De-duplication is performed based on either strict equality or by
+     * matching sources.
+     *
+     * @return Boolean Returns true if we have not seen this asset yet
+     */
+    public function accept()
+    {
+        $asset = $this->getInnerIterator()->current(true);
+        $duplicate = false;
+
+        // check strict equality
+        if (in_array($asset, $this->visited, true)) {
+            $duplicate = true;
+        } else {
+            $this->visited[] = $asset;
+        }
+
+        // check source
+        $sourceRoot = $asset->getSourceRoot();
+        $sourcePath = $asset->getSourcePath();
+        if ($sourceRoot && $sourcePath) {
+            $source = $sourceRoot.'/'.$sourcePath;
+            if (in_array($source, $this->sources)) {
+                $duplicate = true;
+            } else {
+                $this->sources[] = $source;
+            }
+        }
+
+        return !$duplicate;
+    }
+
+    /**
+     * Passes visited objects and source URLs to the child iterator.
+     */
+    public function getChildren()
+    {
+        return new self($this->getInnerIterator()->getChildren(), $this->visited, $this->sources);
+    }
+}
+
+/**
+ * Iterates over an asset collection.
+ *
+ * The iterator is responsible for cascading filters and target URL patterns
+ * from parent to child assets.
+ *
+ * @author Kris Wallsmith <kris.wallsmith@gmail.com>
+ * @access private
+ */
+class AssetCollectionIterator implements \RecursiveIterator
+{
+    private $assets;
+    private $filters;
+    private $output;
+    private $clones;
+
+    public function __construct(AssetCollection $coll, \SplObjectStorage $clones)
+    {
+        $this->assets  = $coll->all();
+        $this->filters = $coll->getFilters();
+        $this->output  = $coll->getTargetPath();
+        $this->clones  = $clones;
+
+        if (false === $pos = strpos($this->output, '.')) {
+            $this->output .= '_*';
+        } else {
+            $this->output = substr($this->output, 0, $pos).'_*'.substr($this->output, $pos);
+        }
+    }
+
+    /**
+     * Returns a copy of the current asset with filters and a target URL applied.
+     *
+     * @param Boolean $raw Returns the unmodified asset if true
+     */
+    public function current($raw = false)
+    {
+        $asset = current($this->assets);
+
+        if ($raw) {
+            return $asset;
+        }
+
+        // clone once
+        if (!isset($this->clones[$asset])) {
+            $clone = $this->clones[$asset] = clone $asset;
+
+            // generate a target path based on asset name
+            $name = sprintf('%s_%d', pathinfo($asset->getSourcePath(), PATHINFO_FILENAME) ?: 'part', $this->key() + 1);
+            $clone->setTargetPath(str_replace('*', $name, $this->output));
+        } else {
+            $clone = $this->clones[$asset];
+        }
+
+        // cascade filters
+        foreach ($this->filters as $filter) {
+            $clone->ensureFilter($filter);
+        }
+
+        return $clone;
+    }
+
+    public function key()
+    {
+        return key($this->assets);
+    }
+
+    public function next()
+    {
+        return next($this->assets);
+    }
+
+    public function rewind()
+    {
+        return reset($this->assets);
+    }
+
+    public function valid()
+    {
+        return false !== current($this->assets);
+    }
+
+    public function hasChildren()
+    {
+        return current($this->assets) instanceof AssetCollection;
+    }
+
+    /**
+     * @uses current()
+     */
+    public function getChildren()
+    {
+        return new self($this->current(), $this->clones);
+    }
+}