46 lines
1.5 KiB
Python
46 lines
1.5 KiB
Python
# 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.
|
|
#
|
|
|
|
"""Common client utilities"""
|
|
|
|
import argparse
|
|
import os
|
|
|
|
|
|
def env(*vars, **kwargs):
|
|
"""Search for the first defined of possibly many env vars
|
|
|
|
Returns the first environment variable defined in vars, or
|
|
returns the default defined in kwargs.
|
|
"""
|
|
for v in vars:
|
|
value = os.environ.get(v, None)
|
|
if value:
|
|
return value
|
|
return kwargs.get('default', '')
|
|
|
|
|
|
class KeyValueAction(argparse.Action):
|
|
"""A custom action to parse arguments as key=value pairs. """
|
|
|
|
def __call__(self, parser, namespace, values, option_string=None):
|
|
# Make sure we have an empty dict rather than None
|
|
if getattr(namespace, self.dest, None) is None:
|
|
setattr(namespace, self.dest, {})
|
|
|
|
# Add value if an assignment else remove it
|
|
if '=' in values:
|
|
getattr(namespace, self.dest, {}).update([values.split('=', 1)])
|
|
else:
|
|
getattr(namespace, self.dest, {}).pop(values, None)
|