124 lines
3.8 KiB
Python
124 lines
3.8 KiB
Python
# Copyright 2012 OpenStack LLC.
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# All Rights Reserved.
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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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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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"""
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Common client utilities
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"""
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import os
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import sys
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import uuid
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import prettytable
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from openstackclient.common import exceptions
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def find_resource(manager, name_or_id):
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"""Helper for the _find_* methods."""
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# first try to get entity as integer id
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try:
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if isinstance(name_or_id, int) or name_or_id.isdigit():
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return manager.get(int(name_or_id))
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except exceptions.NotFound:
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pass
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# now try to get entity as uuid
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try:
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uuid.UUID(str(name_or_id))
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return manager.get(name_or_id)
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except (ValueError, exceptions.NotFound):
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pass
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# finally try to find entity by name
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try:
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return manager.find(name=name_or_id)
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except exceptions.NotFound:
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msg = "No %s with a name or ID of '%s' exists." % \
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(manager.resource_class.__name__.lower(), name_or_id)
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raise exceptions.CommandError(msg)
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def get_item_properties(item, fields, mixed_case_fields=[], formatters={}):
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"""Return a tuple containing the item properties.
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:param item: a single item resource (e.g. Server, Tenant, etc)
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:param fields: tuple of strings with the desired field names
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:param mixed_case_fields: tuple of field names to preserve case
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:param formatters: dictionary mapping field names to callables
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to format the values
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"""
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row = []
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for field in fields:
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if field in formatters:
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row.append(formatters[field](item))
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else:
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if field in mixed_case_fields:
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field_name = field.replace(' ', '_')
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else:
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field_name = field.lower().replace(' ', '_')
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data = getattr(item, field_name, '')
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row.append(data)
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return tuple(row)
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def string_to_bool(arg):
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return arg.strip().lower() in ('t', 'true', 'yes', '1')
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def env(*vars, **kwargs):
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"""Search for the first defined of possibly many env vars
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Returns the first environment variable defined in vars, or
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returns the default defined in kwargs.
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"""
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for v in vars:
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value = os.environ.get(v, None)
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if value:
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return value
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return kwargs.get('default', '')
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def import_class(import_str):
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"""Returns a class from a string including module and class
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:param import_str: a string representation of the class name
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:rtype: the requested class
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"""
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mod_str, _sep, class_str = import_str.rpartition('.')
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__import__(mod_str)
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return getattr(sys.modules[mod_str], class_str)
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def get_client_class(api_name, version, version_map):
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"""Returns the client class for the requested API version
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:param api_name: the name of the API, e.g. 'compute', 'image', etc
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:param version: the requested API version
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:param version_map: a dict of client classes keyed by version
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:rtype: a client class for the requested API version
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"""
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try:
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client_path = version_map[str(version)]
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except (KeyError, ValueError):
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msg = "Invalid %s client version '%s'. must be one of: %s" % (
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(api_name, version, ', '.join(version_map.keys())))
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raise exc.UnsupportedVersion(msg)
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return import_class(client_path)
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