containerd-packaging/scripts/deb-or-rpm

#!/usr/bin/env sh

#   Copyright 2018-2022 Docker 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.

IMAGE=$1

run() {
	docker run --rm -i "${IMAGE}" sh -c "$*" > /dev/null 2> /dev/null
}

if run rpm --version; then
	echo "rpm"
elif run dpkg --version; then
	echo "deb"
else
	exit 1
fi