add version command

seafile_mirror/__init__.py

@@ -1,3 +1,10 @@
 # SPDX-FileCopyrightText: 2023 Max Mehl <https://mehl.mx>
 #
 # SPDX-License-Identifier: Apache-2.0
+
+
+"""Global init file"""
+
+from importlib.metadata import version
+
+__version__ = version("seafile-mirror")

seafile_mirror/seafile_mirror.py

@@ -14,6 +14,7 @@ from time import sleep
 
 import yaml
 
+from . import __version__
 from ._cachedb import db_read
 from ._helpers import convert_bytes, findstring, get_lock
 from ._seafile import (
@@ -48,6 +49,7 @@ parser.add_argument(
     default=False,
     help="Print and log DEBUG messages",
 )
+parser.add_argument("--version", action="version", version="%(prog)s " + __version__)
 
 
 def main():  # pylint: disable=too-many-locals, too-many-statements