Fix regression in RHEL 8 / Python3.6 support. (#700)

Check for python version to handle method signature change in argparse Signed-off-by: ijnek <[email protected]> Co-authored-by: Steven! Ragnarök <[email protected]>
ros-infrastructure · Mar 29, 2024 · b3e1b3a · b3e1b3a
1 parent 504bc68
commit b3e1b3a
Showing 1 changed file with 9 additions and 7 deletions.
diff --git a/bloom/commands/generate.py b/bloom/commands/generate.py
@@ -58,13 +58,15 @@ def load_generator_description(generator_name):
 
 def create_subparsers(parser, generator_cmds):
     metavar = '[' + ' | '.join(generator_cmds) + ']'
-    subparsers = parser.add_subparsers(
-        title='generate commands',
-        metavar=metavar,
-        description='Call `bloom-generate {0} -h` for help on a each generate command.'.format(metavar),
-        dest='generator_cmd',
-        required=True
-    )
+    subparsers_kwargs = {
+      'title': 'generate commands',
+      'metavar': metavar,
+      'description': 'Call `bloom-generate {0} -h` for help on a each generate command.'.format(metavar),
+      'dest': 'generator_cmd'
+    }
+    if sys.version_info >= (3, 7):
+        subparsers_kwargs['required'] = True
+    subparsers = parser.add_subparsers(**subparsers_kwargs)
     for generator_cmd in generator_cmds:
         desc = load_generator_description(generator_cmd)
         cmd_parser = subparsers.add_parser(desc['title'], description=desc['description'])