dc8596fe74
Change-Id: I665cd61272f881dce2d387da6035a2f35c866add Signed-off-by: Stephen Finucane <stephenfin@redhat.com>
58 lines
1.8 KiB
Python
58 lines
1.8 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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import os
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from openstackclient.i18n import _
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def bool_from_str(value, strict=False):
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true_strings = ('1', 't', 'true', 'on', 'y', 'yes')
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false_strings = ('0', 'f', 'false', 'off', 'n', 'no')
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if isinstance(value, bool):
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return value
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lowered = value.strip().lower()
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if lowered in true_strings:
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return True
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elif lowered in false_strings or not strict:
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return False
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msg = _(
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"Unrecognized value '%(value)s'; acceptable values are: %(valid)s"
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) % {
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'value': value,
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'valid': ', '.join(
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f"'{s}'" for s in sorted(true_strings + false_strings)
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),
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}
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raise ValueError(msg)
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def boolenv(*vars, default=False):
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"""Search for the first defined of possibly many bool-like env vars.
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Returns the first environment variable defined in vars, or returns the
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default.
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:param vars: Arbitrary strings to search for. Case sensitive.
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:param default: The default to return if no value found.
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:returns: A boolean corresponding to the value found, else the default if
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no value found.
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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 bool_from_str(value)
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return default
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