Use argparse special features to handle displaying version info (#486)

* Use argparse special features to handle displaying version info

* Remove version argument check from spotdl.py

spotdl/handle.py

@@ -7,6 +7,7 @@ import argparse
 import mimetypes
 import os
 
+import spotdl
 from spotdl import internals
 
 
@@ -120,9 +121,6 @@ def get_arguments(raw_args=None, to_group=True, to_merge=True):
             "--username",
             help="load tracks from user's playlist into <playlist_name>.txt",
         )
-        group.add_argument(
-            "-V", "--version", help="show version and exit", action="store_true"
-        )
 
     parser.add_argument(
         "--write-m3u",
@@ -257,6 +255,9 @@ def get_arguments(raw_args=None, to_group=True, to_merge=True):
     parser.add_argument(
         "-c", "--config", default=None, help="path to custom config.yml file"
     )
+    parser.add_argument(
+        "-V", "--version", action="version", version="%(prog)s {}".format(spotdl.__version__)
+    )
 
     parsed = parser.parse_args(raw_args)
 

spotdl/spotdl.py

@@ -49,10 +49,6 @@ def match_args():
 def main():
     const.args = handle.get_arguments()
 
-    if const.args.version:
-        print("spotdl {version}".format(version=__version__))
-        sys.exit()
-
     internals.filter_path(const.args.folder)
     youtube_tools.set_api_key()