Add Apache2 Copyright info to files

add-apache2-copyright.sh

#!/usr/bin/env bash

if [[ -z "$2" ]]; then
  echo './add-apache2-copyright.sh <path> <ext>';
  exit;
fi

for i in $(find $1 -type f -name "*.$2")
do
  HAS_CR_COMMENT=$(cat $i | grep 'www.apache.org')
  if [[ -z "$HAS_CR_COMMENT" ]]; then
    cat > tmp-file << EOL
/**
* Copyright 2023 Angus.Fenying <fenying@litert.org>
*
* 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.
*/

EOL
    cat $i >> tmp-file
    cat tmp-file > $i
  fi
done

rm -f tmp-file