checksum.sh

#!/bin/bash

#
# Copyright 2022 Google LLC
#
# 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
#
#     https://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.
#

RESULT_FILE=$1

if [ -f $RESULT_FILE ]; then
  rm $RESULT_FILE
fi
touch $RESULT_FILE

checksum_file() {
  echo $(openssl md5 $1 | awk '{print $2}')
}

FILES=()
while read -r -d ''; do
	FILES+=("$REPLY")
done < <(find . -type f \( -name "build.gradle*" -o -name "*.versions.toml" -o -name "gradle-wrapper.properties" \) -print0)

# Loop through files and append MD5 to result file
for FILE in ${FILES[@]}; do
	echo $(checksum_file $FILE) >> $RESULT_FILE
done
# Now sort the file so that it is idempotent
sort $RESULT_FILE -o $RESULT_FILE