Show the version in a footer for logged-in users

The version is read once at startup from the VERSION file, which is now
also copied into the Docker image. The footer is right-aligned below the
content block and only shown to logged-in users, so anonymous visitors
do not learn the exact version.

The startup log now has "Max starting." at the beginning of main() and
"Max initialized, version X." at the end, so a failed startup is visible
by the missing second line.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Dockerfile

@@ -32,6 +32,7 @@ ENV MAX_PRODUCTION=1
 # Owned by root, so the app cannot modify its own code
 COPY max/ ./max
 COPY scripts/prod/ .
+COPY VERSION .
 # Precompile, since the app cannot write __pycache__ at runtime
 RUN python -m compileall -q max
 

max/app.py

@@ -19,6 +19,7 @@ from .routes import init_routes
 from .security_headers import init_security_headers
 from .sessions import SessionInterface
 from .translations import TranslationHandler
+from .version import init_version
 
 
 class Rule(WerkzeugRule):
@@ -29,7 +30,7 @@ class Rule(WerkzeugRule):
 def main():
     app = Flask(__name__)
     init_logging(app)
-    app.logger.info("Max started.")
+    app.logger.info("Max starting.")
     if app.debug and os.environ.get("MAX_PRODUCTION") == "1":
         raise RuntimeError(
             "Debug mode is not allowed in production (MAX_PRODUCTION=1), unset FLASK_DEBUG"
@@ -39,6 +40,7 @@ def main():
     else:
         app.logger.info("App is in production mode")
     TranslationHandler.init(app)
+    init_version(app)
     app.jinja_env.trim_blocks = True
     app.jinja_env.lstrip_blocks = True
     app.url_rule_class = Rule
@@ -70,6 +72,7 @@ def main():
     init_auth(app)
     init_routes(app)
     init_security_headers(app)
+    app.logger.info("Max initialized, version %s.", app.config["VERSION"])
     return app
 
 

max/static/base.css

@@ -108,6 +108,13 @@ form {
     background-color: #FFFFFF;
     border: 1px solid #CCCCCC;
 }
+footer {
+    width: calc(60% + 32px);
+    margin: -14px auto 20px auto;
+    text-align: right;
+    font-size: 0.8em;
+    color: #888888;
+}
 
 .top-row-button {
     margin: 1.1em 0;
@@ -210,6 +217,11 @@ form {
         width: calc(100% - 72px);
         margin: 60px 20px 20px 20px;
     }
+
+    footer {
+        width: calc(100% - 40px);
+        margin: -14px 20px 20px 20px;
+    }
 }
 
 @media (max-width: 900px) {

max/templates/base.html

@@ -62,6 +62,11 @@
         <div class="content">
             {% block content %}{% endblock %}
         </div>
+        {% if session['user_id'] %}
+        <footer>
+            Version {{ version }}
+        </footer>
+        {% endif %}
     </div>
 </body>
 </html>

max/version.py

@@ -0,0 +1,9 @@
+from pathlib import Path
+
+VERSION_FILE = Path(__file__).resolve().parent.parent / "VERSION"
+
+
+def init_version(app):
+    version = VERSION_FILE.read_text(encoding="utf-8").strip()
+    app.config["VERSION"] = version
+    app.context_processor(lambda: dict(version=version))