#!/bin/sh
 # update-copyright-sh - Simple tool to update the Copyright lines
 #                       in all files checked into git
 #

 # Copyright (C) 2016-2018 David Sommerseth <davids@openvpn.net>

 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
 # as published by the Free Software Foundation; either version 2
 # of the License.
 #
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 #
 
 # Basic shell sanity
 set -eu
 
 # Simple argument control
 if [ $# -ne 1 ]; then
     echo "Usage: $0 <New Copyright Year>"
     exit 1
 fi
 
 # Only update Copyright lines with these owners
 # The 'or' operator is GNU sed specific, and must be \|
 UPDATE_COPYRIGHT_LINES="@openvpn\.net\|@fox-it\.com\|@sophos.com\|@eurephia\.net\|@greenie\.muc\.de"
 COPY_YEAR="$1"
 
 cd "$(git rev-parse --show-toplevel)"
 for file in $(git ls-files | grep -v vendor/);
 do
     echo -n "Updating $file ..."
     # The first sed operation covers 20xx-20yy copyright lines,
     # The second sed operation changes 20xx -> 20xx-20yy
     sed -e "/$UPDATE_COPYRIGHT_LINES/s/\(Copyright (C) 20..-\)\(20..\)[[:blank:]]\+/\1$COPY_YEAR /" \
         -e "/$UPDATE_COPYRIGHT_LINES/s/\(Copyright (C) \)\(20..\)[[:blank:]]\+/\1\2-$COPY_YEAR /" \
         -i $file
     echo " Done"
 done
 echo
 echo "** All files updated with $COPY_YEAR as the ending copyright year"
 echo
 exit 0