41 lines
1.4 KiB
Python
41 lines
1.4 KiB
Python
# 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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cfg = None
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_NOT_FOUND = object()
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def get_oslo_config():
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"""Runtime load the oslo.config object.
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In performance optimization of openstackclient it was determined that even
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optimistically loading oslo.config if available had a performance cost.
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Given that we used to only raise the ImportError when the function was
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called also attempt to do the import to do everything at runtime.
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"""
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global cfg
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# First Call
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if not cfg:
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try:
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from oslo_config import cfg
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except ImportError:
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cfg = _NOT_FOUND
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if cfg is _NOT_FOUND:
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raise ImportError("oslo.config is not an automatic dependency of "
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"keystoneauth. If you wish to use oslo.config "
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"you need to import it into your application's "
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"requirements file. ")
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return cfg
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