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# coding: utf-8
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#
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# Copyright © 2010—2014 Andrey Mikhaylenko and contributors
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#
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# This file is part of Argh.
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#
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# Argh is free software under terms of the GNU Lesser
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# General Public License version 3 (LGPLv3) as published by the Free
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# Software Foundation. See the file README.rst for copying conditions.
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#
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"""
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Helpers
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~~~~~~~
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"""
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import argparse
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from argh.completion import autocomplete
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from argh.assembling import add_commands, set_default_command
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from argh.dispatching import PARSER_FORMATTER, ArghNamespace, dispatch
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__all__ = ['ArghParser']
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class ArghParser(argparse.ArgumentParser):
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"""
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A subclass of :class:`ArgumentParser` with support for and a couple
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of convenience methods.
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All methods are but wrappers for stand-alone functions
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:func:`~argh.assembling.add_commands`,
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:func:`~argh.completion.autocomplete` and
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:func:`~argh.dispatching.dispatch`.
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Uses :attr:`~argh.dispatching.PARSER_FORMATTER`.
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"""
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def __init__(self, *args, **kwargs):
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kwargs.setdefault('formatter_class', PARSER_FORMATTER)
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super(ArghParser, self).__init__(*args, **kwargs)
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def set_default_command(self, *args, **kwargs):
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"Wrapper for :func:`~argh.assembling.set_default_command`."
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return set_default_command(self, *args, **kwargs)
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def add_commands(self, *args, **kwargs):
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"Wrapper for :func:`~argh.assembling.add_commands`."
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return add_commands(self, *args, **kwargs)
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def autocomplete(self):
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"Wrapper for :func:`~argh.completion.autocomplete`."
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return autocomplete(self)
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def dispatch(self, *args, **kwargs):
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"Wrapper for :func:`~argh.dispatching.dispatch`."
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return dispatch(self, *args, **kwargs)
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def parse_args(self, args=None, namespace=None):
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"""
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Wrapper for :meth:`argparse.ArgumentParser.parse_args`. If `namespace`
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is not defined, :class:`argh.dispatching.ArghNamespace` is used.
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This is required for functions to be properly used as commands.
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"""
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namespace = namespace or ArghNamespace()
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return super(ArghParser, self).parse_args(args, namespace)
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