python-vitrageclient/vitrageclient/shell.py

# 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.


"""
Vitrage command line interface
"""

from __future__ import print_function
import client
import logging
import noauth
import os
import sys
import warnings

from cliff import app
from cliff import commandmanager
from keystoneauth1 import exceptions
from keystoneauth1 import loading
from v1 import topology
from vitrageclient import __version__


class VitrageCommandManager(commandmanager.CommandManager):
    COMMANDS = {
        "topology list": topology.TopologyList,
        "topology show": topology.TopologyShow,
    }

    def load_commands(self, namespace):
        for k, v in self.COMMANDS.items():
            self.add_command(k, v)


class VitrageShell(app.App):
    def __init__(self):
        super(VitrageShell, self).__init__(
            description=__doc__,
            version=__version__,
            command_manager=VitrageCommandManager(None),
            deferred_help=True,
        )

    def build_option_parser(self, description, version, **argparse_kwargs):
        """Return an argparse option parser for this application.

        Subclasses may override this method to extend
        the parser with more global options.

        :param description: full description of the application
        :paramtype description: str
        :param version: version number for the application
        :paramtype version: str
        :param argparse_kwargs: extra keyword argument passed to the
                                ArgumentParser constructor
        :paramtype extra_kwargs: dict
        """

        parser = super(VitrageShell, self).build_option_parser(description,
                                                               version)
        # Global arguments, one day this should go to keystoneauth1
        parser.add_argument(
            '--os-region-name',
            metavar='<auth-region-name>',
            dest='region_name',
            default=os.environ.get('OS_REGION_NAME'),
            help='Authentication region name (Env: OS_REGION_NAME)')
        parser.add_argument(
            '--os-interface',
            metavar='<interface>',
            dest='interface',
            choices=['admin', 'public', 'internal'],
            default=os.environ.get('OS_INTERFACE'),
            help='Select an interface type.'
                 ' Valid interface types: [admin, public, internal].'
                 ' (Env: OS_INTERFACE)')
        parser.add_argument(
            '--vitrage-api-version',
            default=os.environ.get('VITRAGE_API_VERSION', '1'),
            help='Defaults to env[VITRAGE_API_VERSION] or 1.')
        loading.register_session_argparse_arguments(parser=parser)
        plugin = loading.register_auth_argparse_arguments(
            parser=parser, argv=sys.argv, default="password")

        if not isinstance(plugin, noauth.VitrageNoAuthLoader):
            parser.add_argument(
                '--vitrage-endpoint',
                metavar='<endpoint>',
                dest='endpoint',
                default=os.environ.get('VITRAGE_ENDPOINT'),
                help='Vitrage endpoint (Env: VITRAGE_ENDPOINT)')

        return parser

    @property
    def client(self):
        if self._client is None:
            if hasattr(self.options, "endpoint"):
                endpoint_override = self.options.endpoint
            else:
                endpoint_override = None
            auth_plugin = loading.load_auth_from_argparse_arguments(
                self.options)
            session = loading.load_session_from_argparse_arguments(
                self.options, auth=auth_plugin)

            # noinspection PyAttributeOutsideInit
            self._client = client.get_client(
                self.options.vitrage_api_version,
                session=session,
                interface=self.options.interface,
                region_name=self.options.region_name,
                endpoint_override=endpoint_override)

        return self._client

    def clean_up(self, cmd, result, err):
        if err and isinstance(err, exceptions.HttpError):
            try:
                error = err.response.json()
            except Exception:
                pass
            else:
                print(error['description'])

    def configure_logging(self):
        if self.options.debug:
            # --debug forces verbose_level 3
            # Set this here so cliff.app.configure_logging() can work
            self.options.verbose_level = 3

        super(VitrageShell, self).configure_logging()
        root_logger = logging.getLogger('')

        # Set logging to the requested level
        if self.options.verbose_level == 0:
            # --quiet
            root_logger.setLevel(logging.ERROR)
            warnings.simplefilter("ignore")
        elif self.options.verbose_level == 1:
            # This is the default case, no --debug, --verbose or --quiet
            root_logger.setLevel(logging.WARNING)
            warnings.simplefilter("ignore")
        elif self.options.verbose_level == 2:
            # One --verbose
            root_logger.setLevel(logging.INFO)
            warnings.simplefilter("once")
        elif self.options.verbose_level >= 3:
            # Two or more --verbose
            root_logger.setLevel(logging.DEBUG)

        # Hide some useless message
        requests_log = logging.getLogger("requests")
        cliff_log = logging.getLogger('cliff')
        stevedore_log = logging.getLogger('stevedore')
        iso8601_log = logging.getLogger("iso8601")

        cliff_log.setLevel(logging.ERROR)
        stevedore_log.setLevel(logging.ERROR)
        iso8601_log.setLevel(logging.ERROR)

        if self.options.debug:
            requests_log.setLevel(logging.DEBUG)
        else:
            requests_log.setLevel(logging.ERROR)


def main(args=None):
    try:
        if args is None:
            args = sys.argv[1:]
        return VitrageShell().run(args)
    except KeyboardInterrupt:
        print("... terminating vitrage client", file=sys.stderr)
        sys.exit(1)
    except Exception as e:
        print(e)
        sys.exit(1)


if __name__ == "__main__":
    main()