Add new cliutils code from oslo-incubator.

Change-Id: I03d93c5024965d4252a18d8cb564a7512b728994
This commit is contained in:
Joe Gordon 2012-12-06 11:41:26 +02:00
parent 0bb977a7d9
commit 10fbd2b49a
2 changed files with 67 additions and 1 deletions

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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2012 Red Hat, Inc.
#
# 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.
import inspect
import string
class MissingArgs(Exception):
def __init__(self, missing):
self.missing = missing
def __str__(self):
if len(self.missing) == 1:
return ("An argument is missing: %(missing)s" %
dict(missing=self.missing[0]))
else:
return ("%(num)d arguments are missing: %(missing)s" %
dict(num=len(self.missing),
missing=string.join(self.missing, ', ')))
def validate_args(fn, *args, **kwargs):
"""Check that the supplied args are sufficient for calling a function.
>>> validate_args(lambda a: None)
Traceback (most recent call last):
...
MissingArgs: An argument is missing: a
>>> validate_args(lambda a, b, c, d: None, 0, c=1)
Traceback (most recent call last):
...
MissingArgs: 2 arguments are missing: b, d
:param fn: the function to check
:param arg: the positional arguments supplied
:param kwargs: the keyword arguments supplied
"""
argspec = inspect.getargspec(fn)
num_defaults = len(argspec.defaults or [])
required_args = argspec.args[:len(argspec.args) - num_defaults]
def isbound(method):
return getattr(method, 'im_self', None) is not None
if isbound(fn):
required_args.pop(0)
missing = [arg for arg in required_args if arg not in kwargs]
missing = missing[len(args):]
if missing:
raise MissingArgs(missing)

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[DEFAULT] [DEFAULT]
# The list of modules to copy from openstack-common # The list of modules to copy from openstack-common
modules=cfg,context,excutils,eventlet_backdoor,fileutils,gettextutils,importutils,iniparser,jsonutils,local,lockutils,log,network_utils,notifier,plugin,policy,setup,timeutils,rpc,uuidutils modules=cfg,cliutils,context,excutils,eventlet_backdoor,fileutils,gettextutils,importutils,iniparser,jsonutils,local,lockutils,log,network_utils,notifier,plugin,policy,setup,timeutils,rpc,uuidutils
# The base module to hold the copy of openstack.common # The base module to hold the copy of openstack.common
base=nova base=nova