126 lines
3.8 KiB
Python
126 lines
3.8 KiB
Python
# Copyright 2012 Bouvet ASA
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#
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# Author: Endre Karlson <endre.karlson@bouvet.no>
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#
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# 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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# Copied: designate
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import sys
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import traceback
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import eventlet
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from oslo_config import cfg
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from oslo_log import log as logging
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from oslo_reports import guru_meditation_report as gmr
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from stevedore.extension import ExtensionManager
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import designate.conf
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from designate import utils
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from designate import version
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eventlet.monkey_patch(os=False)
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# Monkey patch the original current_thread to use the up-to-date _active
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# global variable. See https://bugs.launchpad.net/bugs/1863021 and
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# https://github.com/eventlet/eventlet/issues/592
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import __original_module_threading as orig_threading # noqa
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import threading # noqa
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orig_threading.current_thread.__globals__['_active'] = threading._active
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CONF = designate.conf.CONF
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def methods_of(obj):
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"""Get all callable methods of an object that don't start with underscore
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returns a list of tuples of the form (method_name, method)
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"""
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result = []
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for i in dir(obj):
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if callable(getattr(obj, i)) and not i.startswith('_'):
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result.append((i, getattr(obj, i)))
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return result
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def get_available_commands():
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em = ExtensionManager('designate.manage')
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return {e.name: e.plugin for e in em.extensions}
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def add_command_parsers(subparsers):
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for category, cls in get_available_commands().items():
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command_object = cls()
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parser = subparsers.add_parser(category)
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parser.set_defaults(command_object=command_object)
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category_subparsers = parser.add_subparsers(dest='action')
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category_subparsers.required = True
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for action, action_fn in methods_of(command_object):
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action = getattr(action_fn, '_cmd_name', action)
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parser = category_subparsers.add_parser(action)
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action_kwargs = []
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for args, kwargs in getattr(action_fn, 'args', []):
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parser.add_argument(*args, **kwargs)
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parser.set_defaults(action_fn=action_fn)
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parser.set_defaults(action_kwargs=action_kwargs)
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category_opt = cfg.SubCommandOpt('category', title='Commands',
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help='Available Commands',
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handler=add_command_parsers)
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def get_arg_string(args):
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arg = None
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if args[0] == '-':
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# (Note)zhiteng: args starts with FLAGS.oparser.prefix_chars
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# is optional args. Notice that cfg module takes care of
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# actual ArgParser so prefix_chars is always '-'.
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if args[1] == '-':
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# This is long optional arg
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arg = args[2:]
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else:
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arg = args[1:]
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else:
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arg = args
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return arg.replace('-', '_')
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def fetch_func_args(func):
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fn_args = []
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for args, kwargs in getattr(func, 'args', []):
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arg = kwargs.get('dest', get_arg_string(args[0]))
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fn_args.append(getattr(CONF.category, arg))
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return fn_args
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def main():
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CONF.register_cli_opt(category_opt)
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utils.read_config('designate', sys.argv)
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logging.setup(CONF, 'designate')
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gmr.TextGuruMeditation.setup_autorun(version)
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try:
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fn = CONF.category.action_fn
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fn_args = fetch_func_args(fn)
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fn(*fn_args)
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except Exception:
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print('An error has occurred:\n%s' % traceback.format_exc())
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return 255
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