Create the app outside of the global context of app.py to avoid any interference

app.py

@@ -11,6 +11,10 @@ from bricktracker.socket import BrickSocket  # noqa: E402
 
 logger = logging.getLogger(__name__)
 
+
+# Create the app
+# Using 'app' globally interferse with the teardown handlers of Flask
+def create_app(main: bool = False, /) -> Flask | BrickSocket:
     # Create the Flask app
     app = Flask(__name__)
 
@@ -23,16 +27,28 @@ s = BrickSocket(
         threaded=not app.config['NO_THREADED_SOCKET'],
     )
 
+    if main:
+        return s
+    else:
+        return app
+
 
 if __name__ == '__main__':
+    s = create_app(True)
+
+    # This never happens, but makes the linter happy
+    if isinstance(s, Flask):
+        logger.critical('Cannot run locally with a Flask object, needs a BrickSocket. Use create_app(True) to return a BrickSocket')  # noqa: E501
+        exit(1)
+
     # Run the application
     logger.info('Starting BrickTracker on {host}:{port}'.format(
-        host=app.config['HOST'],
+        host=s.app.config['HOST'],
-        port=app.config['PORT'],
+        port=s.app.config['PORT'],
     ))
     s.socket.run(
-        app,
+        s.app,
-        host=app.config['HOST'],
+        host=s.app.config['HOST'],
-        debug=app.config['DEBUG'],
+        debug=s.app.config['DEBUG'],
-        port=app.config['PORT'],
+        port=s.app.config['PORT'],
     )

bricktracker/app.py

@@ -96,6 +96,6 @@ def setup_app(app: Flask) -> None:
         g.version = __version__
 
     # Make sure all connections are closed at the end
-    @app.teardown_appcontext
+    @app.teardown_request
-    def close_connections(exception, /) -> None:
+    def teardown_request(_: BaseException | None) -> None:
         close()

entrypoint.sh

@@ -13,4 +13,4 @@ then
 fi
 
 # Execute the WSGI server
-gunicorn --bind "${BK_SERVER}:${BK_PORT}" "app:app" --worker-class "eventlet" "$@"
+gunicorn --bind "${BK_SERVER}:${BK_PORT}" "app:create_app()" --worker-class "eventlet" "$@"