224 lines
7.9 KiB
Python
224 lines
7.9 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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Command-line interface to the Evoque Project.
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"""
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from __future__ import print_function
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import argparse
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import sys
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from oslo_log import handlers
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from oslo_log import log as logging
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from oslo_utils import encodeutils
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import six
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import evoqueclient
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from evoqueclient import client as apiclient
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from evoqueclient.common import utils
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from evoqueclient.openstack.common.apiclient import exceptions as exc
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logger = logging.getLogger(__name__)
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class EvoqueShell(object):
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def get_base_parser(self):
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parser = argparse.ArgumentParser(
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prog='evoque',
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description=__doc__.strip(),
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epilog='See "evoque help COMMAND" '
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'for help on a specific command.',
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add_help=False,
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formatter_class=HelpFormatter,
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)
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# Global arguments
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parser.add_argument('-h', '--help',
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action='store_true',
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help=argparse.SUPPRESS,)
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parser.add_argument('--version',
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action='version',
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version=evoqueclient.__version__,
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help="Show program's version number and exit.")
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parser.add_argument('-d', '--debug',
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default=bool(utils.env('EVOQUECLIENT_DEBUG')),
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action='store_true',
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help='Defaults to env[EVOQUECLIENT_DEBUG].')
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parser.add_argument('-v', '--verbose',
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default=False, action="store_true",
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help="Print more verbose output.")
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parser.add_argument('--api-timeout',
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help='Number of seconds to wait for an '
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'API response, '
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'defaults to system socket timeout.')
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parser.add_argument('--evoque-url',
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default=utils.env('EVOQUE_URL'),
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help='Defaults to env[EVOQUE_URL].')
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parser.add_argument('--evoque-api-version',
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default=utils.env(
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'EVOQUE_API_VERSION', default='1'),
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help='Defaults to env[EVOQUE_API_VERSION] '
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'or 1.')
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return parser
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def get_subcommand_parser(self, version):
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parser = self.get_base_parser()
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self.subcommands = {}
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subparsers = parser.add_subparsers(metavar='<subcommand>')
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submodule = utils.import_versioned_module(version, 'shell')
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self._find_actions(subparsers, submodule)
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self._find_actions(subparsers, self)
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self._add_bash_completion_subparser(subparsers)
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return parser
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def _add_bash_completion_subparser(self, subparsers):
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subparser = subparsers.add_parser(
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'bash_completion',
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add_help=False,
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formatter_class=HelpFormatter
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)
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self.subcommands['bash_completion'] = subparser
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subparser.set_defaults(func=self.do_bash_completion)
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def _find_actions(self, subparsers, actions_module):
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for attr in (a for a in dir(actions_module) if a.startswith('do_')):
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# I prefer to be hypen-separated instead of underscores.
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command = attr[3:].replace('_', '-')
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callback = getattr(actions_module, attr)
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desc = callback.__doc__ or ''
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help = desc.strip().split('\n')[0]
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arguments = getattr(callback, 'arguments', [])
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subparser = subparsers.add_parser(command, help=help,
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description=desc,
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add_help=False,
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formatter_class=HelpFormatter)
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subparser.add_argument('-h', '--help', action='help',
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help=argparse.SUPPRESS)
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self.subcommands[command] = subparser
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for (args, kwargs) in arguments:
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subparser.add_argument(*args, **kwargs)
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subparser.set_defaults(func=callback)
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def _setup_logging(self, debug):
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# Output the logs to command-line interface
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color_handler = handlers.ColorHandler(sys.stdout)
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logger_root = logging.getLogger(None).logger
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logger_root.level = logging.DEBUG if debug else logging.WARNING
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logger_root.addHandler(color_handler)
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# Set the logger level of special library
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logging.getLogger('iso8601') \
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.logger.setLevel(logging.WARNING)
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logging.getLogger('urllib3.connectionpool') \
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.logger.setLevel(logging.WARNING)
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def main(self, argv):
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# Parse args once to find version
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parser = self.get_base_parser()
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(options, args) = parser.parse_known_args(argv)
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self._setup_logging(options.debug)
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# build available subcommands based on version
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api_version = options.evoque_api_version
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subcommand_parser = self.get_subcommand_parser(api_version)
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self.parser = subcommand_parser
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# Handle top-level --help/-h before attempting to parse
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# a command off the command line.
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if (not args and options.help) or not argv:
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self.do_help(options)
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return 0
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# Parse args again and call whatever callback was selected.
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args = subcommand_parser.parse_args(argv)
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# Short-circuit and deal with help command right away.
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if args.func == self.do_help:
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self.do_help(args)
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return 0
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elif args.func == self.do_bash_completion:
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self.do_bash_completion(args)
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return 0
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client = apiclient.Client(api_version)
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args.func(client, args)
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def do_bash_completion(self, args):
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"""Prints all of the commands and options to stdout."""
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commands = set()
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options = set()
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for sc_str, sc in self.subcommands.items():
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commands.add(sc_str)
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for option in list(sc._optionals._option_string_actions):
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options.add(option)
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commands.remove('bash-completion')
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commands.remove('bash_completion')
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print(' '.join(commands | options))
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@utils.arg('command', metavar='<subcommand>', nargs='?',
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help='Display help for <subcommand>')
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def do_help(self, args):
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"""Display help about this program or one of its subcommands.
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"""
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if getattr(args, 'command', None):
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if args.command in self.subcommands:
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self.subcommands[args.command].print_help()
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else:
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msg = "'%s' is not a valid subcommand"
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raise exc.CommandError(msg % args.command)
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else:
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self.parser.print_help()
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class HelpFormatter(argparse.HelpFormatter):
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def start_section(self, heading):
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# Title-case the headings
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heading = '%s%s' % (heading[0].upper(), heading[1:])
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super(HelpFormatter, self).start_section(heading)
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def main(args=None):
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if args is None:
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args = sys.argv[1:]
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try:
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EvoqueShell().main(args)
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except KeyboardInterrupt:
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print('... terminating evoque client', file=sys.stderr)
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sys.exit(1)
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except Exception as e:
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if '--debug' in args or '-d' in args:
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raise
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else:
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print(encodeutils.safe_encode(six.text_type(e)), file=sys.stderr)
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sys.exit(1)
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if __name__ == "__main__":
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main()
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