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# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""Special argparse module that allows to bypass abbrev mode."""
from __future__ import absolute_import
from argparse import * # noqa
import argparse
import sys
import warnings
class ArgumentParser(argparse.ArgumentParser):
if sys.version_info < (3, 5):
def __init__(self, *args, **kwargs):
self.allow_abbrev = kwargs.pop("allow_abbrev", True)
super(ArgumentParser, self).__init__(*args, **kwargs)
def _get_option_tuples(self, option_string):
if self.allow_abbrev:
return super(ArgumentParser, self)._get_option_tuples(
option_string)
return ()
# NOTE(dhellmann): We have to override the methods for creating
# groups to return our objects that know how to deal with the
# special conflict handler.
def add_argument_group(self, *args, **kwargs):
group = _ArgumentGroup(self, *args, **kwargs)
self._action_groups.append(group)
return group
def add_mutually_exclusive_group(self, **kwargs):
group = _MutuallyExclusiveGroup(self, **kwargs)
self._mutually_exclusive_groups.append(group)
return group
def _handle_conflict_ignore(self, action, conflicting_actions):
_handle_conflict_ignore(
self,
self._option_string_actions,
action,
conflicting_actions,
)
def _handle_conflict_ignore(container, option_string_actions,
new_action, conflicting_actions):
# Remember the option strings the new action starts with so we can
# restore them as part of error reporting if we need to.
original_option_strings = new_action.option_strings
# Remove all of the conflicting option strings from the new action
# and report an error if none are left at the end.
for option_string, action in conflicting_actions:
# remove the conflicting option from the new action
new_action.option_strings.remove(option_string)
warnings.warn(
('Ignoring option string {} for new action '
'because it conflicts with an existing option.').format(
option_string))
# if the option now has no option string, remove it from the
# container holding it
if not new_action.option_strings:
new_action.option_strings = original_option_strings
raise argparse.ArgumentError(
new_action,
('Cannot resolve conflicting option string, '
'all names conflict.'),
)
class _ArgumentGroup(argparse._ArgumentGroup):
def _handle_conflict_ignore(self, action, conflicting_actions):
_handle_conflict_ignore(
self,
self._option_string_actions,
action,
conflicting_actions,
)
class _MutuallyExclusiveGroup(argparse._MutuallyExclusiveGroup):
def _handle_conflict_ignore(self, action, conflicting_actions):
_handle_conflict_ignore(
self,
self._option_string_actions,
action,
conflicting_actions,
)
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