handle FileNotFound Exception in separate task

remove dir_path when websocket disconnects during separation, and dir_path ends up being created again

api/api/tasks.py

@@ -78,8 +78,15 @@ def music_separation_task(file_path):
     # Determine the base directory (output path)
     output_path = file_path.parent
     
-    # Run Demucs separation
-    separate_audio_with_demucs(str(file_path), str(output_path))
+    try:
+        # Run Demucs separation
+        separate_audio_with_demucs(str(file_path), str(output_path))
+    except Exception as e:
+        print(f"Failed to separate music into sources: {e}")
+
+        if os.path.exists(os.path.dirname(file_path)):
+            shutil.rmtree(os.path.dirname(file_path))    
+        return False 
     
     # Define expected output dir
     demucs_dir = output_path / 'htdemucs'
@@ -116,6 +123,7 @@ def music_separation_task(file_path):
         return True
     
     except Exception as e:
+        print(f"Failed to separate music into sources: {e}")
         return False 
    
 @shared_task