#!/bin/bash
#
#    Licensed to the Apache Software Foundation (ASF) under one or more
#    contributor license agreements.  See the NOTICE file distributed with
#    this work for additional information regarding copyright ownership.
#    The ASF licenses this file to You 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.

set -e

IMAGE_NAME=$1

# Find all untagged images
DIGESTS=$(gcloud container images list-tags "${IMAGE_NAME}"  --filter='-tags:*' --format="get(digest)")

# Delete image
echo "${DIGESTS}" | while read -r digest; do
  if [[ ! -z "${digest}" ]]; then
    img="${IMAGE_NAME}@${digest}"
    echo "Removing untagged image ${img}"
    # Tolerate 404 as tags may target to same image and already removed.
    DELETE_RESULT="$(gcloud container images delete --quiet "${img}" 2>&1)" || [[ "$DELETE_RESULT" == *"'status': 404"* ]]
  fi
done
