Add routing service to handle repos in subdirectories

src/GitList/Application.php

@@ -8,6 +8,7 @@ use Silex\Provider\UrlGeneratorServiceProvider;
 use GitList\Provider\GitServiceProvider;
 use GitList\Provider\RepositoryUtilServiceProvider;
 use GitList\Provider\ViewUtilServiceProvider;
+use GitList\Provider\RoutingUtilServiceProvider;
 
 /**
  * GitList application.
@@ -44,6 +45,7 @@ class Application extends SilexApplication
         $this->register(new ViewUtilServiceProvider());
         $this->register(new RepositoryUtilServiceProvider());
         $this->register(new UrlGeneratorServiceProvider());
+        $this->register(new RoutingUtilServiceProvider());
 
         $this['twig'] = $this->share($this->extend('twig', function($twig, $app) {
             $twig->addFilter('md5', new \Twig_Filter_Function('md5'));

src/GitList/Provider/RoutingUtilServiceProvider.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace GitList\Provider;
+
+use GitList\Util\Routing;
+use Silex\Application;
+use Silex\ServiceProviderInterface;
+
+class RoutingUtilServiceProvider implements ServiceProviderInterface
+{
+    /**
+     * Register the Util\Repository class on the Application ServiceProvider
+     *
+     * @param Application $app Silex Application
+     */
+    public function register(Application $app)
+    {
+        $app['util.routing'] = $app->share(function () use ($app) {
+            return new Routing($app);
+        });
+    }
+
+    public function boot(Application $app)
+    {
+    }
+}

src/GitList/Util/Routing.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace Gitlist\Util;
+
+use Silex\Application;
+
+class Routing
+{
+    protected $app;
+
+    public function __construct(Application $app)
+    {
+        $this->app = $app;
+    }
+
+    public function getRepositoryRegex()
+    {
+        static $regex = null;
+
+        if ($regex === null) {
+            $app = $this->app;
+            $quoted_paths = array_map(
+                function ($repo) use ($app) {
+                    return preg_quote($app['util.routing']->getRelativePath($repo['path']), '/');
+                },
+                $this->app['git']->getRepositories($this->app['git.repos'])
+            );
+            $regex = '/' . implode('|', $quoted_paths) . '/';
+        }
+
+        return $regex;
+    }
+
+    /**
+     * Strips the base path from a full repository path
+     *
+     * @param string $repo_path Full path to the repository
+     * @return string Relative path to the repository from git.repositories
+     */
+    public function getRelativePath($repo_path)
+    {
+        if (strpos($repo_path, $this->app['git.repos']) === 0) {
+            $relative_path = substr($repo_path, strlen($this->app['git.repos']));
+            return ltrim($relative_path, '/');
+        } else {
+            throw new \InvalidArgumentException(
+                sprintf("Path '%s' does not match configured repository directory", $repo_path)
+            );
+        }
+    }
+}