Show git branch and commit hash on homepage if available.

src/Controller/HomepageController.php

@@ -30,6 +30,7 @@
 
 namespace App\Controller;
 
+use App\Services\GitVersionInfo;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
 use Symfony\Component\Routing\Annotation\Route;
 
@@ -38,11 +39,12 @@ class HomepageController extends AbstractController
     /**
      * @Route("/", name="homepage")
      */
-    public function homepage()
+    public function homepage(GitVersionInfo $versionInfo)
     {
-        return $this->render('homepage.html.twig',
-            [
-                'banner' => $this->getParameter('banner'),
-            ]);
+        return $this->render('homepage.html.twig', [
+            'banner' => $this->getParameter('banner'),
+            'git_branch' => $versionInfo->getGitBranchName(),
+            'git_commit' => $versionInfo->getGitCommitHash()
+        ]);
     }
 }

src/Services/GitVersionInfo.php

@@ -0,0 +1,76 @@
+<?php
+/**
+ *
+ * part-db version 0.1
+ * Copyright (C) 2005 Christoph Lechner
+ * http://www.cl-projects.de/
+ *
+ * part-db version 0.2+
+ * Copyright (C) 2009 K. Jacobs and others (see authors.php)
+ * http://code.google.com/p/part-db/
+ *
+ * Part-DB Version 0.4+
+ * Copyright (C) 2016 - 2019 Jan Böhmer
+ * https://github.com/jbtronics
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ *
+ */
+
+namespace App\Services;
+
+
+use Symfony\Component\HttpKernel\KernelInterface;
+
+class GitVersionInfo
+{
+    protected $project_dir;
+
+    public function __construct(KernelInterface $kernel)
+    {
+        $this->project_dir = $kernel->getProjectDir();
+    }
+
+    /**
+     * Get the Git branch name of the installed system
+     * @return  string|null       The current git branch name. Null, if this is no Git installation
+     */
+    public function getGitBranchName()
+    {
+        if (file_exists($this->project_dir . '/.git/HEAD')) {
+            $git = file($this->project_dir . '/.git/HEAD');
+            $head = explode('/', $git[0], 3);
+            return trim($head[2]);
+        }
+        return null; // this is not a Git installation
+    }
+
+    /**
+     * Get hash of the last git commit (on remote "origin"!)
+     * @note    If this method does not work, try to make a "git pull" first!
+     * @param integer $length       if this is smaller than 40, only the first $length characters will be returned
+     * @return string|null       The hash of the last commit, null If this is no Git installation
+     */
+    public function getGitCommitHash(int $length = 7)
+    {
+        $filename = $this->project_dir . '/.git/refs/remotes/origin/' . $this->getGitBranchName();
+        if (file_exists($filename)) {
+            $head = file($filename);
+            $hash = $head[0];
+            return substr($hash, 0, $length);
+        }
+        return null; // this is not a Git installation
+    }
+}

templates/homepage.html.twig

@@ -5,6 +5,9 @@
         <h1 class="display-3">{{ partdb_title }}</h1>
         <h4>
             {% trans %}version.caption{% endtrans %}: {{ shivas_app_version }}
+            {% if git_branch is not empty or git_commit is not empty %}
+                ({{ git_branch ?? '' }}/{{ git_commit ?? '' }})
+            {% endif %}
         </h4>
         {% if banner is not empty %}
             <hr>