Show git version in footer

Author: shiv-tyagi

app.py

@@ -668,13 +668,15 @@ def filter_build_options_by_category(build_options, category):
 def parse_build_categories(build_options):
     return sorted(list(set([f.category for f in build_options])))
 
+GIT_VERSION_SHORT = get_git_hash('HEAD', os.path.abspath(app.root_path))[:10]
+
 @app.route('/', defaults={'token': None}, methods=['GET'])
 @app.route('/<token>', methods=['GET'])
 def home(token):
     if token:
         app.logger.info("Showing log for build id " + token)
     app.logger.info('Rendering index.html')
-    return render_template('index.html', token=token)
+    return render_template('index.html', token=token, app_git_version=GIT_VERSION_SHORT)
 
 @app.route("/builds/<path:name>")
 def download_file(name):

templates/index.html

@@ -64,10 +64,13 @@
                 </span>|
                 <span class="mx-2">Source:
                     <a href="https://github.com/Ardupilot/CustomBuild" style="text-decoration: underline; color: white;">Ardupilot/CustomBuild</a>
+                </span>|
+                <span class="mx-2">Git Version:
+                    <a href="https://github.com/Ardupilot/CustomBuild/commit/{{ app_git_version }}" style="text-decoration: underline; color: white;">{{ app_git_version }}</a>
                 </span>
             </div>
-            <span>To try out the newest features of the app, please visit our beta server 
-                <a href="https://custom-beta.ardupilot.org" style="text-decoration: underline; color: white;">custom-beta.ardupilot.org</a>
+            <span>To try out the newest features of the app, please visit our 
+                <a href="https://custom-beta.ardupilot.org" style="text-decoration: underline; color: white;">beta server</a>
             </span>
         </div>
     </div>