528b3665c2
Some templates can have substitutions for values used throughout the template. We should expose this feature via the command line. partially implements bp openstack-client-heat-translator Change-Id: Iee4c21285afa77e7e5b36437928b3d62c10e465e
46 lines
1.5 KiB
Python
46 lines
1.5 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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#
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"""Common client utilities"""
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import argparse
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import os
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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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class KeyValueAction(argparse.Action):
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"""A custom action to parse arguments as key=value pairs. """
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def __call__(self, parser, namespace, values, option_string=None):
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# Make sure we have an empty dict rather than None
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if getattr(namespace, self.dest, None) is None:
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setattr(namespace, self.dest, {})
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# Add value if an assignment else remove it
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if '=' in values:
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getattr(namespace, self.dest, {}).update([values.split('=', 1)])
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else:
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getattr(namespace, self.dest, {}).pop(values, None)
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