7dd634a371
Ensure help subcommand behaves as expected when given options and a command as an argument to lookup. Refactor to provide the parent parser as a default argument (using weakref to avoid a reference cycle) so that the execute method can be made consistent across all subcommands while still providing access to the parent parser for the help subcommand. Co-Authored-By: Paul Bourke <paul.bourke@oracle.com> Change-Id: I9f7e10bbc2268d111dca7c3dbe55a87e3f057d87
41 lines
1.5 KiB
Python
41 lines
1.5 KiB
Python
#
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# Copyright (c) 2012-2015 Hewlett-Packard Development Company, L.P.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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from git_upstream.commands import GitUpstreamCommand
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from git_upstream.log import LogDedentMixin
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class HelpCommand(LogDedentMixin, GitUpstreamCommand):
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"""Display help about this program or one of its commands."""
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name = "help"
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def __init__(self, *args, **kwargs):
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super(HelpCommand, self).__init__(*args, **kwargs)
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self.parser.add_argument('command', metavar='<command>', nargs='?',
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help="command to display help about")
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def execute(self):
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if getattr(self.args, 'command', None):
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if self.args.command in self.args.subcommands:
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self.args.subcommands[self.args.command].print_help()
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else:
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self.parser.error("'%s' is not a valid subcommand" %
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self.args.command)
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else:
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self.args.parent_parser.print_help()
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