# optparse.py
# CLI options parser.
#
# Copyright (C) 2016 Red Hat, Inc.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions of
# the GNU General Public License v.2, or (at your option) any later version.
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY expressed or implied, including the implied warranties of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
# Public License for more details. You should have received a copy of the
# GNU General Public License along with this program; if not, write to the
# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA. Any Red Hat trademarks that are incorporated in the
# source code or documentation are not subject to the GNU General Public
# License and may only be used or replicated with the express permission of
# Red Hat, Inc.
#
import argparse
import sys
import re
[docs]class OptionParser(argparse.ArgumentParser):
"""
Subclass to handle command line switches.
"""
def __init__(self, **kwargs):
argparse.ArgumentParser.__init__(self, add_help=False, **kwargs)
self._addBasicOptions()
def _addBasicOptions(self):
self.add_argument("-v", "--verbose", action="store_true",
default=None, help="Show verbose output.")
self.add_argument("-c", "--config", action="store",
default="/etc/fm/fm.cfg",
help="Configuration file.")
self.add_argument("-r", "--root", action="store",
default="/",
help="Path to root directory of the filesystem.")
self.add_argument("-n", "--no-dnf", action="store_true",
default=False,
help="Do not call DNF during enable/disable.")
self.add_argument("-y", "--assumeyes", action="store_true",
default=False,
help="Automatically answer yes for all questions")
self.add_argument("--show-requirements", action="store_true",
default=False,
help="Show requirements of modules which are hidden by default.")
[docs] def get_usage(self):
"""
Returns the usage information to show to the user.
:return: Usage string.
:rtype: string
"""
usage = ""
options = self.format_help().split('\n')
for option in options[3:]:
usage += " " + option.strip() + "\n"
return usage