backup

backend/app/main.py

@@ -107,15 +107,20 @@ def _external_logging_processor(
     return event_dict
 
 
-def _configure_logging(log_level: str, settings: Settings | None = None) -> None:
+def _configure_logging(log_level: str, log_file: str | None, settings: Settings | None = None) -> None:
     """Configure structlog for production JSON output.
 
     Args:
         log_level: One of ``debug``, ``info``, ``warning``, ``error``, ``critical``.
+        log_file: Optional file path to write logs to (in addition to stdout).
         settings: Optional Settings object to configure external logging.
     """
     level: int = logging.getLevelName(log_level.upper())
-    logging.basicConfig(level=level, stream=sys.stdout, format="%(message)s")
+    handlers: list[logging.Handler] = [logging.StreamHandler(sys.stdout)]
+    if log_file:
+        os.makedirs(os.path.dirname(log_file), exist_ok=True)
+        handlers.append(logging.FileHandler(log_file))
+    logging.basicConfig(level=level, handlers=handlers, format="%(message)s")
 
     processors = [
         structlog.contextvars.merge_contextvars,
@@ -225,7 +230,7 @@ async def _lifespan(app: FastAPI) -> AsyncGenerator[None, None]:
                 raise RuntimeError(msg) from exc
 
     # Now configure logging with the handler in place
-    _configure_logging(settings.log_level, settings)
+    _configure_logging(settings.log_level, settings.log_file, settings)
 
     log.info("bangui_starting_up", database_path=settings.database_path)