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authorMike Elliott <mike.elliott@amdocs.com>2018-11-06 16:45:38 +0000
committerGerrit Code Review <gerrit@onap.org>2018-11-06 16:45:38 +0000
commit0146d732319280a75a39daed993d128ef388e487 (patch)
tree7af257d0bcb88b314ad63f01c599ab5145e787a2 /kubernetes/vvp/charts/vvp-em-uwsgi/resources/config/em/envbool.py
parent1b1f62d2633d70ac2ecd459ca4e3f242534ec3e3 (diff)
parentc2cc5ff1d2520267f9ebabb02eced6ea2a1dc9f6 (diff)
Merge "vvp -- VNF Validation Platform"
Diffstat (limited to 'kubernetes/vvp/charts/vvp-em-uwsgi/resources/config/em/envbool.py')
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diff --git a/kubernetes/vvp/charts/vvp-em-uwsgi/resources/config/em/envbool.py b/kubernetes/vvp/charts/vvp-em-uwsgi/resources/config/em/envbool.py
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+# Copyright © 2018 Amdocs, AT&T, Bell Canada
+#
+# 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.
+
+"""
+envbool.py
+
+Return which environment is currently running on (to setting.py).
+
+"""
+import os
+
+
+def envbool(key, default=False, unknown=True):
+ """Return a boolean value based on that of an environment variable.
+
+ Environment variables have no native boolean type. They are always strings, and may be empty or
+ unset (which differs from empty.) Furthermore, notions of what is "truthy" in shell script
+ differ from that of python.
+
+ This function converts environment variables to python boolean True or False in
+ case-insensitive, expected ways to avoid pitfalls:
+
+ "True", "true", and "1" become True
+ "False", "false", and "0" become False
+ unset or empty becomes False by default (toggle with 'default' parameter.)
+ any other value becomes True by default (toggle with 'unknown' parameter.)
+
+ """
+ return {
+ 'true': True, '1': True, # 't': True,
+ 'false': False, '0': False, # 'f': False.
+ '': default,
+ }.get(os.getenv(key, '').lower(), unknown)