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# Copyright 2012 Bouvet ASA
#
# Author: Endre Karlson <endre.karlson@bouvet.no>
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
# Copied: designate
import sys
import eventlet
from oslo_config import cfg
from oslo_log import log as logging
from oslo_reports import guru_meditation_report as gmr
from stevedore.extension import ExtensionManager
import designate.conf
from designate import utils
from designate import version
eventlet.monkey_patch(os=False)
# Monkey patch the original current_thread to use the up-to-date _active
# global variable. See https://bugs.launchpad.net/bugs/1863021 and
# https://github.com/eventlet/eventlet/issues/592
import __original_module_threading as orig_threading # noqa
import threading # noqa
orig_threading.current_thread.__globals__['_active'] = threading._active
CONF = designate.conf.CONF
def methods_of(obj):
"""Get all callable methods of an object that don't start with underscore
returns a list of tuples of the form (method_name, method)
"""
result = []
for i in dir(obj):
if callable(getattr(obj, i)) and not i.startswith('_'):
result.append((i, getattr(obj, i)))
return result
def get_available_commands():
em = ExtensionManager('designate.manage')
return dict([(e.name, e.plugin) for e in em.extensions])
def add_command_parsers(subparsers):
for category, cls in get_available_commands().items():
command_object = cls()
parser = subparsers.add_parser(category)
parser.set_defaults(command_object=command_object)
category_subparsers = parser.add_subparsers(dest='action')
for (action, action_fn) in methods_of(command_object):
action = getattr(action_fn, '_cmd_name', action)
parser = category_subparsers.add_parser(action)
action_kwargs = []
for args, kwargs in getattr(action_fn, 'args', []):
parser.add_argument(*args, **kwargs)
parser.set_defaults(action_fn=action_fn)
parser.set_defaults(action_kwargs=action_kwargs)
category_opt = cfg.SubCommandOpt('category', title="Commands",
help="Available Commands",
handler=add_command_parsers)
def get_arg_string(args):
arg = None
if args[0] == '-':
# (Note)zhiteng: args starts with FLAGS.oparser.prefix_chars
# is optional args. Notice that cfg module takes care of
# actual ArgParser so prefix_chars is always '-'.
if args[1] == '-':
# This is long optional arg
arg = args[2:]
else:
arg = args[1:]
else:
arg = args
return arg.replace('-', '_')
def fetch_func_args(func):
fn_args = []
for args, kwargs in getattr(func, 'args', []):
arg = kwargs.get('dest', get_arg_string(args[0]))
fn_args.append(getattr(CONF.category, arg))
return fn_args
def main():
CONF.register_cli_opt(category_opt)
utils.read_config('designate', sys.argv)
logging.setup(CONF, 'designate')
gmr.TextGuruMeditation.setup_autorun(version)
fn = CONF.category.action_fn
fn_args = fetch_func_args(fn)
fn(*fn_args)
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