#!/bin/bash
if [ $# -ne 2 ]
then
    echo "Usage : " $0 "new_version old_version"
    exit 1
fi

for i in $(find -type f -name "*.xz" -not -name "-*.xz" ) $(find -type f -name "*.hint" -not -name "-*.hint" )
do
	OF=$(basename $i)
	DF=${OF/$1/$2}
	if [ x${OF} != x${DF} ]
	then
		DD=${i%${OF}}
		cp -- /dev/null ${DD}"-"${DF}
	fi
done