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gh-121018: Fix more cases of exiting in argparse when exit_on_error=False (GH-121056)

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* parse_intermixed_args() now raises ArgumentError instead of calling
  error() if exit_on_error is false.
* Internal code now always raises ArgumentError instead of calling
  error(). It is then caught at the higher level and error() is called if
  exit_on_error is true.
This commit is contained in:
Serhiy Storchaka 2024-06-28 17:21:59 +03:00 committed by GitHub
parent 43709d5d54
commit 81a654a342
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GPG Key ID: B5690EEEBB952194
3 changed files with 59 additions and 16 deletions
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22
Lib/argparse.py
View File

@ -1791,7 +1791,7 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer):
# ==================================
def add_subparsers(self, **kwargs):
if self._subparsers is not None:
self.error(_('cannot have multiple subparser arguments'))
raise ArgumentError(None, _('cannot have multiple subparser arguments'))
# add the parser class to the arguments if it's not present
kwargs.setdefault('parser_class', type(self))
@ -1846,7 +1846,8 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer):
msg = _('unrecognized arguments: %s') % ' '.join(argv)
if self.exit_on_error:
self.error(msg)
raise ArgumentError(None, msg)
else:
raise ArgumentError(None, msg)
return args
def parse_known_args(self, args=None, namespace=None):
@ -2135,7 +2136,7 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer):
self._get_value(action, action.default))
if required_actions:
self.error(_('the following arguments are required: %s') %
raise ArgumentError(None, _('the following arguments are required: %s') %
', '.join(required_actions))
# make sure all required groups had one option present
@ -2151,7 +2152,7 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer):
for action in group._group_actions
if action.help is not SUPPRESS]
msg = _('one of the arguments %s is required')
self.error(msg % ' '.join(names))
raise ArgumentError(None, msg % ' '.join(names))
# return the updated namespace and the extra arguments
return namespace, extras
@ -2178,7 +2179,7 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer):
arg_strings = self._read_args_from_files(arg_strings)
new_arg_strings.extend(arg_strings)
except OSError as err:
self.error(str(err))
raise ArgumentError(None, str(err))
# return the modified argument list
return new_arg_strings
@ -2258,7 +2259,7 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer):
for action, option_string, sep, explicit_arg in option_tuples])
args = {'option': arg_string, 'matches': options}
msg = _('ambiguous option: %(option)s could match %(matches)s')
self.error(msg % args)
raise ArgumentError(None, msg % args)
# if exactly one action matched, this segmentation is good,
# so return the parsed action
@ -2318,7 +2319,7 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer):
# shouldn't ever get here
else:
self.error(_('unexpected option string: %s') % option_string)
raise ArgumentError(None, _('unexpected option string: %s') % option_string)
# return the collected option tuples
return result
@ -2375,8 +2376,11 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer):
def parse_intermixed_args(self, args=None, namespace=None):
args, argv = self.parse_known_intermixed_args(args, namespace)
if argv:
msg = _('unrecognized arguments: %s')
self.error(msg % ' '.join(argv))
msg = _('unrecognized arguments: %s') % ' '.join(argv)
if self.exit_on_error:
self.error(msg)
else:
raise ArgumentError(None, msg)
return args
def parse_known_intermixed_args(self, args=None, namespace=None):

48
Lib/test/test_argparse.py
View File

@ -2147,7 +2147,9 @@ class TestAddSubparsers(TestCase):
else:
subparsers_kwargs['help'] = 'command help'
subparsers = parser.add_subparsers(**subparsers_kwargs)
self.assertArgumentParserError(parser.add_subparsers)
self.assertRaisesRegex(argparse.ArgumentError,
'cannot have multiple subparser arguments',
parser.add_subparsers)
# add first sub-parser
parser1_kwargs = dict(description='1 description')
@ -6042,7 +6044,8 @@ class TestWrappingMetavar(TestCase):
class TestExitOnError(TestCase):
def setUp(self):
self.parser = argparse.ArgumentParser(exit_on_error=False)
self.parser = argparse.ArgumentParser(exit_on_error=False,
fromfile_prefix_chars='@')
self.parser.add_argument('--integers', metavar='N', type=int)
def test_exit_on_error_with_good_args(self):
@ -6053,9 +6056,44 @@ class TestExitOnError(TestCase):
with self.assertRaises(argparse.ArgumentError):
self.parser.parse_args('--integers a'.split())
def test_exit_on_error_with_unrecognized_args(self):
with self.assertRaises(argparse.ArgumentError):
self.parser.parse_args('--foo bar'.split())
def test_unrecognized_args(self):
self.assertRaisesRegex(argparse.ArgumentError,
'unrecognized arguments: --foo bar',
self.parser.parse_args, '--foo bar'.split())
def test_unrecognized_intermixed_args(self):
self.assertRaisesRegex(argparse.ArgumentError,
'unrecognized arguments: --foo bar',
self.parser.parse_intermixed_args, '--foo bar'.split())
def test_required_args(self):
self.parser.add_argument('bar')
self.parser.add_argument('baz')
self.assertRaisesRegex(argparse.ArgumentError,
'the following arguments are required: bar, baz',
self.parser.parse_args, [])
def test_required_mutually_exclusive_args(self):
group = self.parser.add_mutually_exclusive_group(required=True)
group.add_argument('--bar')
group.add_argument('--baz')
self.assertRaisesRegex(argparse.ArgumentError,
'one of the arguments --bar --baz is required',
self.parser.parse_args, [])
def test_ambiguous_option(self):
self.parser.add_argument('--foobaz')
self.parser.add_argument('--fooble', action='store_true')
self.assertRaisesRegex(argparse.ArgumentError,
"ambiguous option: --foob could match --foobaz, --fooble",
self.parser.parse_args, ['--foob'])
def test_os_error(self):
self.parser.add_argument('file')
self.assertRaisesRegex(argparse.ArgumentError,
"No such file or directory: 'no-such-file'",
self.parser.parse_args, ['@no-such-file'])
def tearDownModule():
# Remove global references to avoid looking like we have refleaks.

5
Misc/NEWS.d/next/Library/2024-06-26-03-04-24.gh-issue-121018.clVSc4.rst
View File

@ -1,2 +1,3 @@
Fixed an issue where :func:`argparse.ArgumentParser.parses_args` did not honor ``exit_on_error=False`` when given unrecognized arguments.
Patch by Ben Hsing
Fixed issues where :meth:`!argparse.ArgumentParser.parses_args` did not honor
``exit_on_error=False``.
Based on patch by Ben Hsing.