Join threads before exitting

spotdl.py

@@ -13,6 +13,7 @@ import urllib.request
 import sys
 import os
 import time
+import threading
 
 
 def generate_songname(tags):
@@ -374,19 +375,25 @@ def grab_single(raw_song, number=None):
     if not check_exists(file_name, raw_song, islist=islist):
         if download_song(file_name, content):
             print('')
-            input_song = file_name + args.input_ext
-            output_song = file_name + args.output_ext
-            convert.song(input_song, output_song, args.folder,
-                         avconv=args.avconv, verbose=args.verbose)
-            if not args.input_ext == args.output_ext:
-                os.remove(os.path.join(args.folder, input_song))
-
-            if not args.no_metadata:
-                metadata.embed(os.path.join(args.folder, output_song), meta_tags)
+            thread = threading.Thread(target=finalize, args=(file_name, meta_tags))
+            threads.append(thread)
+            thread.start()
         else:
             print('No audio streams available')
 
 
+def finalize(file_name, meta_tags):
+    input_song = file_name + args.input_ext
+    output_song = file_name + args.output_ext
+    convert.song(input_song, output_song, args.folder,
+                 avconv=args.avconv, verbose=args.verbose)
+    if not args.input_ext == args.output_ext:
+        os.remove(os.path.join(args.folder, input_song))
+
+    if not args.no_metadata:
+        metadata.embed(os.path.join(args.folder, output_song), meta_tags)
+
+
 class TestArgs(object):
     manual = False
     input_ext = '.m4a'
@@ -403,6 +410,7 @@ if __name__ == '__main__':
     args = misc.get_arguments()
 
     misc.filter_path(args.folder)
+    threads = []
 
     if args.song:
         grab_single(raw_song=args.song)
@@ -412,6 +420,9 @@ if __name__ == '__main__':
         grab_playlist(playlist=args.playlist)
     elif args.username:
         feed_playlist(username=args.username)
+
+    for thread in threads:
+        thread.join()
 else:
     misc.filter_path('Music')
     args = TestArgs()