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license_check.sh
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#!/bin/bash
###########################################################################
#
# Copyright (c) 2013-2015, ARM Limited, All Rights Reserved
# SPDX-License-Identifier: Apache-2.0
#
# 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.
#
###########################################################################
# regular expression to find an existing license header and extract the year
lic_regex="(?<=\(C\) COPYRIGHT [0-9]{4}\-)[0-9]{4}(?= ARM Limited)"
# git root folder
git_root=$(git rev-parse --show-toplevel)
# parse all files in the repository
echo "Parsing files license headers in $git_root..."
cnt=0
while read -r line
do
full_name=$git_root/$line
# get year of latest commit
git_yr=$(git log -1 --format="%ad" -- $full_name | awk '{print $5}')
# check if the file with a date mismatch actually has a license header
lic_yr=$(grep -Pos "$lic_regex" "$full_name")
if [ -n "$lic_yr" ]
then
# check if there is a date mismatch
if [ "$git_yr" -gt "$lic_yr" ]
then
# replace the current year in the license header
echo " Changed year: $git_yr (was $lic_yr) for $line"
perl -pi -e "s/$lic_regex/$git_yr/" $full_name
# increment counter
cnt=$((cnt + 1))
fi
fi
done < <(git ls-tree -r --name-only HEAD)
# final message
if [ "$cnt" -eq 1 ]
then
echo "$cnt file changed"
else
echo "$cnt files changed"
fi
echo "Goodbye!"