Show help when run without arguments

scripts/knotctl

@@ -259,8 +259,13 @@ def main() -> int:
     ttl = None
     if 'ttl' in args:
         ttl = args.ttl
-    url = setup_url(baseurl, args.argument, args.data, args.name, args.rtype,
-                    ttl, args.zone)
+    try:
+        url = setup_url(baseurl, args.argument, args.data, args.name,
+                        args.rtype, ttl, args.zone)
+    except AttributeError:
+        parser.print_help(sys.stderr)
+        sys.exit(1)
+
     try:
         if args.command == "add":
             run_add(url, args.json, headers)

setup.py

@@ -5,7 +5,7 @@ with open("README.md", "r", encoding="utf-8") as fh:
 
 setuptools.setup(
     name="knotctl",
-    version="0.0.2",
+    version="0.0.3",
     packages = setuptools.find_packages(),
     author="Micke Nordin",
     author_email="hej@mic.ke",