get-active-roles-project-iam.sh

#!/usr/bin/env bash

# Copyright 2023 METRO Digital GmbH
#
# 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.

# do not allow unset variables
set -u
# exit script on any error
set -e

function check_program() {
	set +e # next command may fail - allow failure
	PRG="$(command -v "$1" 2>/dev/null)"
	set -e # exit script on any error again
	if [ -z "$PRG" ]; then
		echo "ERROR - \"$1\" not found" >&2
		exit 1
	fi
}

check_program jq
check_program curl

eval "$(jq -r '@sh "PROJECT_ID=\(.project_id) ACCESS_TOKEN=\(.access_token)"')"

curl -H "Authorization: Bearer ${ACCESS_TOKEN}" -s -X POST \
	"https://cloudresourcemanager.googleapis.com/v3/projects/${PROJECT_ID}:getIamPolicy" -d "" |
	jq -c '{roles: [.bindings[].role] | join(",")}'