Allow specifying files via $min_symlinks paths

If you have an alias/symlink like "//~name" => "/full/path", then you can
now serve with the more logical URL http://example.com/min/?f=~name/foo.css

Fixes #137

index.php

@@ -52,6 +52,7 @@ $server = new Minify($cache);
 // TODO probably should do this elsewhere...
 $min_serveOptions['minifierOptions']['text/css']['docRoot'] = $env->getDocRoot();
 $min_serveOptions['minifierOptions']['text/css']['symlinks'] = $min_symlinks;
+$min_serveOptions['minApp']['symlinks'] = $min_symlinks;
 // auto-add targets to allowDirs
 foreach ($min_symlinks as $uri => $target) {
     $min_serveOptions['minApp']['allowDirs'][] = $target;

lib/Minify/CSS/UriRewriter.php

@@ -48,8 +48,8 @@ class Minify_CSS_UriRewriter {
         );
         self::$_currentDir = self::_realpath($currentDir);
         self::$_symlinks = array();
-        
+
-        // normalize symlinks
+        // normalize symlinks in order to map to link
         foreach ($symlinks as $link => $target) {
             $link = ($link === '//')
                 ? self::$_docRoot

lib/Minify/Controller/MinApp.php

@@ -33,11 +33,22 @@ class Minify_Controller_MinApp extends Minify_Controller_Base {
             array(
                 'groupsOnly' => false,
                 'groups' => array(),
+                'symlinks' => array(),
             )
             ,(isset($options['minApp']) ? $options['minApp'] : array())
         );
         unset($options['minApp']);
 
+        // normalize $symlinks in order to map to target
+        $symlinks = array();
+        foreach ($localOptions['symlinks'] as $link => $target) {
+            if (0 === strpos($link, '//')) {
+                $link = rtrim(substr($link, 1), '/') . '/';
+                $target = rtrim($target, '/\\');
+                $symlinks[$link] = $target;
+            }
+        }
+
         $sources = array();
         $selectionId = '';
         $firstMissingResource = null;
@@ -127,6 +138,14 @@ class Minify_Controller_MinApp extends Minify_Controller_Base {
                 $uri = $base . $file;
                 $path = $this->env->getDocRoot() . $uri;
 
+                // try to rewrite path
+                foreach ($symlinks as $link => $target) {
+                    if (0 === strpos($uri, $link)) {
+                        $path = $target . DIRECTORY_SEPARATOR . substr($uri, strlen($link));
+                        break;
+                    }
+                }
+
                 try {
                     $source = $this->sourceFactory->makeSource(array(
                         'filepath' => $path,