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# Copyright 2012-2013 Amazon.com, Inc. or its affiliates. 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. A copy of
# the License is located at
#
# http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file 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 logging
from botocore.hooks import HierarchicalEmitter
log = logging.getLogger('awscli.plugin')
BUILTIN_PLUGINS = {'__builtin__': 'awscli.handlers'}
def load_plugins(plugin_mapping, event_hooks=None, include_builtins=True):
"""
:type plugin_mapping: dict
:param plugin_mapping: A dict of plugin name to import path,
e.g. ``{"plugingName": "package.modulefoo"}``.
:type event_hooks: ``EventHooks``
:param event_hooks: Event hook emitter. If one if not provided,
an emitter will be created and returned. Otherwise, the
passed in ``event_hooks`` will be used to initialize plugins.
:type include_builtins: bool
:param include_builtins: If True, the builtin awscli plugins (specified in
``BUILTIN_PLUGINS``) will be included in the list of plugins to load.
:rtype: HierarchicalEmitter
:return: An event emitter object.
"""
if include_builtins:
plugin_mapping.update(BUILTIN_PLUGINS)
modules = _import_plugins(plugin_mapping)
if event_hooks is None:
event_hooks = HierarchicalEmitter()
for name, plugin in zip(plugin_mapping.keys(), modules):
log.debug("Initializing plugin %s: %s", name, plugin)
plugin.awscli_initialize(event_hooks)
return event_hooks
def _import_plugins(plugin_names):
plugins = []
for name, path in plugin_names.items():
log.debug("Importing plugin %s: %s", name, path)
if '.' not in path:
plugins.append(__import__(path))
else:
package, module = path.rsplit('.', 1)
module = __import__(path, fromlist=[module])
plugins.append(module)
return plugins
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