1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License 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 os
from openstackclient.i18n import _
def bool_from_str(value, strict=False):
true_strings = ('1', 't', 'true', 'on', 'y', 'yes')
false_strings = ('0', 'f', 'false', 'off', 'n', 'no')
if isinstance(value, bool):
return value
lowered = value.strip().lower()
if lowered in true_strings:
return True
elif lowered in false_strings or not strict:
return False
msg = _(
"Unrecognized value '%(value)s'; acceptable values are: %(valid)s"
) % {
'value': value,
'valid': ', '.join(
f"'{s}'" for s in sorted(true_strings + false_strings)
),
}
raise ValueError(msg)
def boolenv(*vars, default=False):
"""Search for the first defined of possibly many bool-like env vars.
Returns the first environment variable defined in vars, or returns the
default.
:param vars: Arbitrary strings to search for. Case sensitive.
:param default: The default to return if no value found.
:returns: A boolean corresponding to the value found, else the default if
no value found.
"""
for v in vars:
value = os.environ.get(v, None)
if value:
return bool_from_str(value)
return default
|
