initial code added

relative-playlist-maker.py

@@ -0,0 +1,41 @@
+from argparse import ArgumentParser
+from pathlib import Path
+from logging import basicConfig, warning, WARNING
+from shutil import copyfile
+
+def main(music_folder: Path):
+    music_folder = music_folder.resolve()
+
+    for m3u in music_folder.rglob("*.m3u"):
+        copyfile(m3u, m3u.with_suffix(".m3u.bak"))
+
+        with m3u.open("r") as contents:
+            tracks = [Path(p).resolve() for p in contents.readlines()]
+
+        if not all(music_folder in track.parents for track in tracks):
+            warning(f"{m3u} contains references to tracks that are not in {music_folder} and will be skipped")
+            continue
+       
+        with m3u.open("w") as updated_contents:
+            for track in tracks:
+                updated_contents.write(str(track.relative_to(m3u, walk_up=True)).replace("\\", "/"))
+
+
+if __name__ == "__main__":
+    basicConfig(
+        level=WARNING,
+    )
+    
+    parser = ArgumentParser(
+        description=""
+    )
+
+    parser.add_argument(
+        "music_folder",
+        required=True,
+        type=Path
+    )
+
+    args = parser.parse_args()
+
+    main(args.music_folder)