Show help when no args passed

Author: Kirill V. Lyadvinsky

Makefile

@@ -9,6 +9,7 @@ clean:
 	rm -rf test/__pycache__
 	rm -rf zxtools/__pycache__
 	rm -rf zxtools.egg-info
+	rm -rf coverage.xml
 
 coverage:
 	coverage run --source zxtools setup.py test

test/test_hobeta.py

@@ -24,6 +24,9 @@ def test_args_parser(self):
         with self.assertRaises(SystemExit):
             hobeta.parse_args(("-h", "-v"))
 
+        with self.assertRaises(SystemExit):
+            hobeta.parse_args(())
+
         temp_in_file = tempfile.mkstemp()[1]
         input_file = open(temp_in_file, "w")
         input_file.close()

test/test_zeus2txt.py

@@ -25,6 +25,9 @@ def test_args_parser(self):
         with self.assertRaises(SystemExit):
             zeus2txt.parse_args(("-h", "-v"))
 
+        with self.assertRaises(SystemExit):
+            zeus2txt.parse_args(())
+
         temp_in_file = tempfile.mkstemp()[1]
         input_file = open(temp_in_file, "w")
         input_file.close()

zxtools/__init__.py

@@ -8,5 +8,5 @@
 # See LICENSE file in the project root for full license information.
 #
 
-__version__ = '1.0.21'
-CHUNK_SIZE = 512 * 1024  # 512 KBytes
+__version__ = '1.0.22'
+CHUNK_SIZE = 512 * 1024  # 512 KBytes

zxtools/hobeta.py

@@ -153,7 +153,15 @@ def parse_args(args):
         help="Show Hobeta header format description")
     help_parser.set_defaults(func=hobeta_help)
 
-    return parser.parse_args(args)
+    try:
+        options = parser.parse_args(args)
+        if len(args) == 0:
+            raise ValueError
+    except:
+        parser.print_help()
+        sys.exit(0)
+
+    return options
 
 
 def main():

zxtools/zeus2txt.py

@@ -135,7 +135,15 @@ def parse_args(args):
         action='store_true', help="Include original code in the output file")
     convert_parser.set_defaults(func=convert_file)
 
-    return parser.parse_args(args)
+    try:
+        options = parser.parse_args(args)
+        if len(args) == 0:
+            raise ValueError
+    except:
+        parser.print_help()
+        sys.exit(0)
+
+    return options
 
 
 def main():