Do not crash when a repo has a detached HEAD

Instead, we select a default branch - master by default, but the default
branch can be configured using config.ini.

Note that if the default branch does not exist in a repo, that should
not cause any issues.

Also adds phpunit to composer.json's require-dev section.

composer.json

@@ -4,16 +4,23 @@
         "twig/twig": "1.9.*",
         "symfony/twig-bridge": "2.1.*",
         "symfony/filesystem": "2.1.*",
-        "klaussilveira/gitter": "dev-master"
+        "klaussilveira/gitter": "dev-fix-get-branches"
     },
     "require-dev": {
         "symfony/browser-kit": "2.1.*",
-        "symfony/css-selector": "2.1.*"
+        "symfony/css-selector": "2.1.*",
+        "phpunit/phpunit": "3.7.*"
     },
     "minimum-stability": "dev",
     "autoload": {
         "psr-0": {
             "GitList": "src/"
         }
+    },
+    "repositories": [
+        {
+            "type": "vcs",
+            "url": "https://github.com/NateEag/gitter.git"
         }
+    ]
 }

config.ini-example

@@ -1,6 +1,7 @@
 [git]
 client = '/usr/bin/git' ; Your git executable path
 repositories = '/var/www/projects/' ; Path to your repositories
+default_branch = 'master' ; Default branch when HEAD is detached
 
 ; You can hide repositories from GitList, just copy this for each repository you want to hide
 ; hidden[] = '/var/www/projects/BetaTest'

src/GitList/Application.php

@@ -41,6 +41,7 @@ class Application extends SilexApplication
             'git.client'         => $config->get('git', 'client'),
             'git.repos'          => $config->get('git', 'repositories'),
             'git.hidden'         => $config->get('git', 'hidden') ? $config->get('git', 'hidden') : array(),
+            'git.default_branch' => $config->get('git', 'default_branch') ? $config->get('git', 'default_branch') : 'master',
         ));
         $this->register(new ViewUtilServiceProvider());
         $this->register(new RepositoryUtilServiceProvider());

src/GitList/Controller/MainController.php

@@ -52,6 +52,11 @@ class MainController implements ControllerProviderInterface
 
         $route->get('{repo}/{branch}/rss/', function($repo, $branch) use ($app) {
             $repository = $app['git']->getRepository($app['git.repos'] . $repo);
+
+            if ($branch === null) {
+                $branch = $repository->getHead();
+            }
+
             $commits = $repository->getPaginatedCommits($branch);
 
             $html = $app['twig']->render('rss.twig', array(
@@ -63,6 +68,7 @@ class MainController implements ControllerProviderInterface
             return new Response($html, 200, array('Content-Type' => 'application/rss+xml'));
         })->assert('repo', $app['util.routing']->getRepositoryRegex())
           ->assert('branch', $app['util.routing']->getBranchRegex())
+          ->value('branch', null)
           ->bind('rss');
 
         return $route;

src/GitList/Git/Client.php

@@ -6,6 +6,39 @@ use Gitter\Client as BaseClient;
 
 class Client extends BaseClient
 {
+    protected $default_branch;
+
+    public function __construct($options = null)
+    {
+        parent::__construct($options);
+
+        if (!isset($options['default_branch'])) {
+            $options['default_branch'] = 'master';
+        }
+
+        $this->setDefaultBranch($options['default_branch']);
+    }
+
+    /**
+     * Set default branch as a string.
+     *
+     * @param string $branch Name of branch to use when repo's HEAD is detached.
+     */
+    protected function setDefaultBranch($branch)
+    {
+        $this->default_branch = $branch;
+
+        return $this;
+    }
+
+    /**
+     * Return name of default branch as a string.
+     */
+    public function getDefaultBranch()
+    {
+        return $this->default_branch;
+    }
+
     /**
      * Creates a new repository on the specified path
      *

src/GitList/Git/Repository.php

@@ -24,6 +24,16 @@ class Repository extends BaseRepository
         return strpos($logs[0], 'commit') === 0;
     }
 
+    /**
+     * Get the current branch, returning a default value when HEAD is detached.
+     */
+    public function getHead()
+    {
+        $client = $this->getClient();
+
+        return parent::getHead($client->getDefaultBranch());
+    }
+
     /**
      * Show the data from a specific commit
      *

src/GitList/Provider/GitServiceProvider.php

@@ -19,6 +19,7 @@ class GitServiceProvider implements ServiceProviderInterface
         $app['git'] = function () use ($app) {
             $options['path'] = $app['git.client'];
             $options['hidden'] = $app['git.hidden'];
+            $options['default_branch'] = $app['git.default_branch'];
 
             return new Client($options);
         };

tests/InterfaceTest.php

@@ -95,6 +95,16 @@ class InterfaceTest extends WebTestCase
         $repository->setConfig('user.email', 'luke@rebel.org');
         $repository->addAll();
         $repository->commit("Initial commit");
+
+        // Detached HEAD repository fixture
+        $git->createRepository(self::$tmpdir . 'detached-head');
+        $repository = $git->getRepository(self::$tmpdir . '/detached-head');
+        $repository->setConfig('user.name', 'Luke Skywalker');
+        $repository->setConfig('user.email', 'luke@rebel.org');
+        file_put_contents(self::$tmpdir . 'detached-head/README.md', "## detached head\ndetached-head is a *test* repository!");
+        $repository->addAll();
+        $repository->commit("First commit");
+        $repository->checkout('HEAD');
     }
 
     public function createApplication()
@@ -126,8 +136,8 @@ class InterfaceTest extends WebTestCase
         $this->assertEquals('/nested/NestedRepo/master/rss/', $crawler->filter('.repository-header a')->eq(3)->attr('href'));
         $this->assertCount(1, $crawler->filter('div.repository-header:contains("foobar")'));
         $this->assertCount(1, $crawler->filter('div.repository-body:contains("This is a test repo!")'));
-        $this->assertEquals('/foobar/', $crawler->filter('.repository-header a')->eq(6)->attr('href'));
+        $this->assertEquals('/foobar/', $crawler->filter('.repository-header a')->eq(8)->attr('href'));
-        $this->assertEquals('/foobar/master/rss/', $crawler->filter('.repository-header a')->eq(7)->attr('href'));
+        $this->assertEquals('/foobar/master/rss/', $crawler->filter('.repository-header a')->eq(9)->attr('href'));
     }
 
     public function testRepositoryPage()