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4d0ac96bdc
Eventually the "download" command will be changed to set the --no-install flag by default and "update" will become --update-only. For now remain backwards compatible to give people a chance to adjust their scripts and habits. Fixes #18
30 lines
1.1 KiB
Python
30 lines
1.1 KiB
Python
import argparse
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# reference: https://gist.github.com/sampsyo/471779#gistcomment-2886157
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class AliasedSubParsersAction(argparse._SubParsersAction):
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class _AliasedPseudoAction(argparse.Action):
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def __init__(self, name, aliases, help):
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dest = name
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if aliases:
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dest += ' (%s)' % ','.join(aliases)
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sup = super(AliasedSubParsersAction._AliasedPseudoAction, self)
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sup.__init__(option_strings=[], dest=dest, help=help)
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def add_parser(self, name, **kwargs):
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aliases = kwargs.pop('aliases', [])
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parser = super(AliasedSubParsersAction, self).add_parser(name, **kwargs)
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# Make the aliases work.
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for alias in aliases:
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self._name_parser_map[alias] = parser
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# Make the help text reflect them, first removing old help entry.
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if 'help' in kwargs:
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help = kwargs.pop('help')
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self._choices_actions.pop()
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pseudo_action = self._AliasedPseudoAction(name, aliases, help)
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self._choices_actions.append(pseudo_action)
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return parser
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