# Copyright 2010 Jacob Kaplan-Moss
# Copyright 2011 OpenStack LLC.
# All Rights Reserved.
#
# 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.
"""
Command-line interface to the OpenStack Images API.
"""
import argparse
import httplib2
import os
import sys
from glanceclient import exceptions as exc
from glanceclient import utils
from glanceclient.v2_0 import shell as shell_v2_0
from glanceclient.generic import shell as shell_generic
def env(*vars, **kwargs):
"""Search for the first defined of possibly many env vars
Returns the first environment variable defined in vars, or
returns the default defined in kwargs.
"""
for v in vars:
value = os.environ.get(v, None)
if value:
return value
return kwargs.get('default', '')
class OpenStackImagesShell(object):
def get_base_parser(self):
parser = argparse.ArgumentParser(
prog='glance',
description=__doc__.strip(),
epilog='See "glance help COMMAND" '\
'for help on a specific command.',
add_help=False,
formatter_class=OpenStackHelpFormatter,
)
# Global arguments
parser.add_argument('-h', '--help',
action='store_true',
help=argparse.SUPPRESS,
)
parser.add_argument('--debug',
default=False,
action='store_true',
help=argparse.SUPPRESS)
parser.add_argument('--username',
default=env('OS_USERNAME'),
help='Defaults to env[OS_USERNAME]')
parser.add_argument('--password',
default=env('OS_PASSWORD'),
help='Defaults to env[OS_PASSWORD]')
parser.add_argument('--tenant_name',
default=env('OS_TENANT_NAME'),
help='Defaults to env[OS_TENANT_NAME]')
parser.add_argument('--tenant_id',
default=env('OS_TENANT_ID'), dest='os_tenant_id',
help='Defaults to env[OS_TENANT_ID]')
parser.add_argument('--auth_url',
default=env('OS_AUTH_URL'),
help='Defaults to env[OS_AUTH_URL]')
parser.add_argument('--region_name',
default=env('OS_REGION_NAME'),
help='Defaults to env[OS_REGION_NAME]')
parser.add_argument('--identity_api_version',
default=env('OS_IDENTITY_API_VERSION', 'KEYSTONE_VERSION'),
help='Defaults to env[OS_IDENTITY_API_VERSION] or 2.0')
return parser
def get_subcommand_parser(self, version):
parser = self.get_base_parser()
self.subcommands = {}
subparsers = parser.add_subparsers(metavar='<subcommand>')
try:
actions_module = {
'2.0': shell_v2_0,
}[version]
except KeyError:
actions_module = shell_v2_0
self._find_actions(subparsers, actions_module)
self._find_actions(subparsers, shell_generic)
self._find_actions(subparsers, self)
return parser
def _find_actions(self, subparsers, actions_module):
for attr in (a for a in dir(actions_module) if a.startswith('do_')):
# I prefer to be hypen-separated instead of underscores.
command = attr[3:].replace('_', '-')
callback = getattr(actions_module, attr)
desc = callback.__doc__ or ''
help = desc.strip().split('\n')[0]
arguments = getattr(callback, 'arguments', [])
subparser = subparsers.add_parser(command,
help=help,
description=desc,
add_help=False,
formatter_class=OpenStackHelpFormatter
)
subparser.add_argument('-h', '--help',
action='help',
help=argparse.SUPPRESS,
)
self.subcommands[command] = subparser
for (args, kwargs) in arguments:
subparser.add_argument(*args, **kwargs)
subparser.set_defaults(func=callback)
def main(self, argv):
# Parse args once to find version
parser = self.get_base_parser()
(options, args) = parser.parse_known_args(argv)
# build available subcommands based on version
api_version = options.identity_api_version
subcommand_parser = self.get_subcommand_parser(api_version)
self.parser = subcommand_parser
# Handle top-level --help/-h before attempting to parse
# a command off the command line
if options.help:
self.do_help(options)
return 0
# Parse args again and call whatever callback was selected
args = subcommand_parser.parse_args(argv)
# Deal with global arguments
if args.debug:
httplib2.debuglevel = 1
# Short-circuit and deal with help command right away.
if args.func == self.do_help:
self.do_help(args)
return 0
#FIXME(usrleon): Here should be restrict for project id same as
# for username or apikey but for compatibility it is not.
if not utils.isunauthenticated(args.func):
if not args.username:
raise exc.CommandError("You must provide a username "
"via either --username or env[OS_USERNAME]")
if not args.password:
raise exc.CommandError("You must provide a password "
"via either --password or env[OS_PASSWORD]")
if not args.auth_url:
raise exc.CommandError("You must provide an auth url "
"via either --auth_url or via env[OS_AUTH_URL]")
if utils.isunauthenticated(args.func):
self.cs = shell_generic.CLIENT_CLASS(endpoint=args.auth_url)
else:
api_version = options.identity_api_version
self.cs = self.get_api_class(api_version)(
username=args.username,
tenant_name=args.tenant_name,
tenant_id=args.os_tenant_id,
password=args.password,
auth_url=args.auth_url,
region_name=args.region_name)
try:
args.func(self.cs, args)
except exc.Unauthorized:
raise exc.CommandError("Invalid OpenStack Identity credentials.")
except exc.AuthorizationFailure:
raise exc.CommandError("Unable to authorize user")
def get_api_class(self, version):
try:
return {
"2.0": shell_v2_0.CLIENT_CLASS,
}[version]
except KeyError:
return shell_v2_0.CLIENT_CLASS
@utils.arg('command', metavar='<subcommand>', nargs='?',
help='Display help for <subcommand>')
def do_help(self, args):
"""
Display help about this program or one of its subcommands.
"""
if getattr(args, 'command', None):
if args.command in self.subcommands:
self.subcommands[args.command].print_help()
else:
raise exc.CommandError("'%s' is not a valid subcommand" %
args.command)
else:
self.parser.print_help()
# I'm picky about my shell help.
class OpenStackHelpFormatter(argparse.HelpFormatter):
def start_section(self, heading):
# Title-case the headings
heading = '%s%s' % (heading[0].upper(), heading[1:])
super(OpenStackHelpFormatter, self).start_section(heading)
def main():
try:
OpenStackImagesShell().main(sys.argv[1:])
except Exception, e:
if httplib2.debuglevel == 1:
raise # dump stack.
else:
print >> sys.stderr, e
sys.exit(1)