From 0a1b9e645159c2bbe5f875d84772b32bddaa00ba Mon Sep 17 00:00:00 2001
From: Martijn van der Ven <martijn@vanderven.se>
Date: Wed, 13 May 2026 00:00:55 +0200
Subject: [PATCH] Render the commit hash on the page

---
 app.py                 | 9 ++++++++-
 templates/index.jinja2 | 1 +
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/app.py b/app.py
index 808c04c..8e53678 100644
--- a/app.py
+++ b/app.py
@@ -1,4 +1,5 @@
 import json
+import os
 import traceback
 from collections import OrderedDict
 
@@ -8,6 +9,8 @@
 
 app = Flask(__name__)
 
+COMMIT = os.environ.get("HEROKU_BUILD_COMMIT", "")
+
 mf2py.Parser.user_agent = "python.microformats.io (mf2py/" + mf2py.__version__ + ") Mozilla/5.0 Chrome/29.0.1547.57 Safari/537.36"
 mf2py.Parser.dict_class = OrderedDict
 
@@ -50,7 +53,11 @@ def fetch_mf2(url):
                 response.headers["Content-Type"] = "application/json"
             return response
 
-        return render_template("index.jinja2", mf2py_version=mf2py.__version__)
+        return render_template(
+            "index.jinja2",
+            mf2py_version=mf2py.__version__,
+            commit=COMMIT,
+        )
     except BaseException as e:
         traceback.print_exc()
         return jsonify(error="%s: %s" % (type(e).__name__, e)), 400
diff --git a/templates/index.jinja2 b/templates/index.jinja2
index 8391093..f3b27f1 100644
--- a/templates/index.jinja2
+++ b/templates/index.jinja2
@@ -114,6 +114,7 @@
         </li>
       </ul>
     </footer>
+    {% if commit %}<!-- commit: {{ commit }} -->{% endif %}
 
   </main>
 </body>