very simply version

game_backuper/cml.py

@@ -0,0 +1,31 @@
+from getopt import getopt, GetoptError
+from typing import List
+from platform import system
+if system() == "Windows":
+    import os
+    DEFAULT_CONFIG = f'{os.environ["APPDATA"]}\\game-backuper.yaml'
+else:
+    DEFAULT_CONFIG = '/etc/game-backuper.yaml'
+
+
+class Opts:
+    config_file: str = DEFAULT_CONFIG
+
+    def __init__(self, cml: List[str]):
+        try:
+            r = getopt(cml, 'hc:', [])
+            for i in r[0]:
+                if i[0] == '-h':
+                    self.print_help()
+                    import sys
+                    sys.exit(0)
+                elif i[0] == '-c':
+                    self.config_file = i[1]
+        except GetoptError:
+            from traceback import print_exc
+            print_exc()
+            import sys
+            sys.exit(-1)
+
+    def print_help(self):
+        print('''game-backuper [options] [game names]''')