Support running with no args - show help

photojawn/cli.py

@@ -1,4 +1,5 @@
 import logging
+import sys
 from argparse import ArgumentParser, Namespace
 from pathlib import Path
 
@@ -15,6 +16,7 @@ def main() -> None:
     setup_logging(args.logging)
 
     # Load config from file if it exists
+    if hasattr(args, "album_path"):
         conf_path = Path(args.album_path) / Path(args.config)
         if conf_path.exists():
             logger.debug(f"Reading config from {conf_path}")
@@ -98,7 +100,12 @@ def parse_args() -> Namespace:
         help="Path to the main photos directory",
     )
 
-    return parser.parse_args()
+    args = parser.parse_args()
+    if not hasattr(args, 'action'):
+        parser.print_help()
+        sys.exit(0)
+
+    return args
 
 
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