Add argparse

karaokatalog/deduplicate/__main__.py

@@ -1,5 +1,5 @@
+import argparse
 import logging
-import sys
 from pathlib import Path
 
 from tqdm import tqdm
@@ -14,11 +14,28 @@ logging.basicConfig(
     format="%(asctime)s [%(levelname)s] %(message)s", level=logging.INFO
 )
 
+
+def parse_args() -> argparse.Namespace:
+    parser = argparse.ArgumentParser(
+        prog="python3 -m karaokatalog.deduplicate",
+        description="Deduplicate UltraStar Deluxe song libraries",
+    )
+
+    parser.add_argument(
+        "library_path",
+        type=Path,
+        help="The directory which contains the songs, the one you'd also configure UltraStar Deluxe to use",
+    )
+
+    return parser.parse_args()
+
+
 if __name__ == "__main__":
+    args = parse_args()
     logging.info("Karaokatalog Deduplication started")
 
     logging.info("Loading library")
-    library = Library.from_dir(Path(sys.argv[1]))
+    library = Library.from_dir(args.library_path)
     logging.info("Library loaded")
 
     logging.info("Finding duplicates (songs with identical title and artist)")