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#!/usr/bin/env python
# Copyright 2017 Google, Inc.
#
# 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.
"""This application demonstrates how to get and set IAM policies on Google
Cloud Storage buckets.
For more information, see the documentation at
https://cloud.google.com/storage/docs/access-control/using-iam-permissions.
"""
import argparse
from google.cloud import storage
def view_bucket_iam_members(bucket_name):
storage_client = storage.Client()
bucket = storage_client.bucket(bucket_name)
policy = bucket.get_iam_policy()
for role in policy:
members = policy[role]
print('Role: {}, Members: {}'.format(role, members))
def add_bucket_iam_member(bucket_name, role, member):
storage_client = storage.Client()
bucket = storage_client.bucket(bucket_name)
policy = bucket.get_iam_policy()
policy[role].add(member)
bucket.set_iam_policy(policy)
print('Added {} with role {} to {}.'.format(
member, role, bucket_name))
def remove_bucket_iam_member(bucket_name, role, member):
storage_client = storage.Client()
bucket = storage_client.bucket(bucket_name)
policy = bucket.get_iam_policy()
policy[role].discard(member)
bucket.set_iam_policy(policy)
print('Removed {} with role {} from {}.'.format(
member, role, bucket_name))
if __name__ == '__main__':
parser = argparse.ArgumentParser(
description=__doc__,
formatter_class=argparse.RawDescriptionHelpFormatter)
parser.add_argument('bucket_name', help='Your Cloud Storage bucket name.')
subparsers = parser.add_subparsers(dest='command')
subparsers.add_parser(
'view-bucket-iam-members', help=view_bucket_iam_members.__doc__)
add_member_parser = subparsers.add_parser(
'add-bucket-iam-member', help=add_bucket_iam_member.__doc__)
add_member_parser.add_argument('role')
add_member_parser.add_argument('member')
remove_member_parser = subparsers.add_parser(
'remove-bucket-iam-member', help=remove_bucket_iam_member.__doc__)
remove_member_parser.add_argument('role')
remove_member_parser.add_argument('member')
args = parser.parse_args()
if args.command == 'view-bucket-iam-members':
view_bucket_iam_members(args.bucket_name)
elif args.command == 'add-bucket-iam-member':
add_bucket_iam_member(args.bucket_name, args.role, args.member)
elif args.command == 'remove-bucket-iam-member':
remove_bucket_iam_member(args.bucket_name, args.role, args.member)