fix argument parsing in sequencer.py

helpers/sequencer.py

@@ -78,10 +78,15 @@ def dispatch(action, args=[]):
         raise ValueError(f"Action {action} not found")
 
 if __name__ == "__main__":
+    commandname = sys.argv[0]
+    commandname = commandname.split("/")[-1]
+    using_alias = commandname != "sequencer.py"
+
     parser = argparse.ArgumentParser()
     parser.add_argument("--config", "-c", default=generate.CONFIG_FILE)
     parser.add_argument("--skip", action='append')
-    parser.add_argument("action", nargs="?")
+    if not using_alias:
+        parser.add_argument("action", nargs="?")
     cliargs = parser.parse_args()
 
     if cliargs.skip is None:
@@ -92,10 +97,7 @@ if __name__ == "__main__":
     if os.path.dirname(cliargs.config) != "":
         os.chdir(os.path.dirname(cliargs.config))
 
-    commandname = sys.argv[0]
-    commandname = commandname.split("/")[-1]
-
-    if commandname != "sequencer.py":
+    if using_alias:
         dispatch(commandname)
     elif cliargs.action:
         dispatch(cliargs.action)