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Add Python 3 aliases to our argparse backport.

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This commit is contained in:
Todd Gamblin 2016-01-03 01:19:03 -08:00
parent 56937416a9
commit 21fae634a5
1 changed files with 17 additions and 5 deletions
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22
lib/spack/external/argparse.py vendored
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@ -1067,9 +1067,13 @@ class _SubParsersAction(Action):
class _ChoicesPseudoAction(Action):
def __init__(self, name, help):
def __init__(self, name, aliases, help):
metavar = dest = name
if aliases:
metavar += ' (%s)' % ', '.join(aliases)
sup = super(_SubParsersAction._ChoicesPseudoAction, self)
sup.__init__(option_strings=[], dest=name, help=help)
sup.__init__(option_strings=[], dest=dest, help=help,
metavar=metavar)
def __init__(self,
option_strings,
@ -1097,15 +1101,22 @@ def add_parser(self, name, **kwargs):
if kwargs.get('prog') is None:
kwargs['prog'] = '%s %s' % (self._prog_prefix, name)
aliases = kwargs.pop('aliases', ())
# create a pseudo-action to hold the choice help
if 'help' in kwargs:
help = kwargs.pop('help')
choice_action = self._ChoicesPseudoAction(name, help)
choice_action = self._ChoicesPseudoAction(name, aliases, help)
self._choices_actions.append(choice_action)
# create the parser and add it to the map
parser = self._parser_class(**kwargs)
self._name_parser_map[name] = parser
# make parser available under aliases also
for alias in aliases:
self._name_parser_map[alias] = parser
return parser
def _get_subactions(self):
@ -1123,8 +1134,9 @@ def __call__(self, parser, namespace, values, option_string=None):
try:
parser = self._name_parser_map[parser_name]
except KeyError:
tup = parser_name, ', '.join(self._name_parser_map)
msg = _('unknown parser %r (choices: %s)' % tup)
args = {'parser_name': parser_name,
'choices': ', '.join(self._name_parser_map)}
msg = _('unknown parser %(parser_name)r (choices: %(choices)s)') % args
raise ArgumentError(self, msg)
# parse all the remaining options into the namespace