Merge pull request #10 from biosafetylvl5/fix-template-arg-error

Add rich tracebacks

src/brassy/brassy.py

@@ -67,7 +67,8 @@ def get_parser():
         "--write-yaml-template",
         type=str,
         help="Write template YAML to provided file."
-        + " If no value provided, use current git branch name as file name.",
+        + " If folder provided, place template in folder with current "
+        + "git branch name as file name.",
         nargs="?",
         default=argparse.SUPPRESS,
     )
@@ -171,7 +172,8 @@ def exit_on_invalid_arguments(args, parser, console):
         return
 
     if "write_yaml_template" in args:
-        return
+        if args.write_yaml_template is not None:
+            return
 
     console.print("[bold red]Invalid arguments.\n")
     parser.print_help()