#!/bin/bash
if [ $# -lt 3 ]
then
	echo "using: $0 <search-for> <replace-with> <file-list>"
	exit
fi
if [ "$1" = "-f" ]
then 
	flag="-f"
	shift 1
else
	flag="-i"
fi
search="$(echo "$1"|awk '{gsub("\\","\\\\");gsub("/","\\/");print $0}')"
replace="$(echo "$2"|awk '{gsub("\\","\\\\");gsub("[$]","\\$");gsub("/","\\/");print $0}')"
shift 2
echo "replace \"$search\" with \"$replace\" in the files "
bold=`tput smso`
offbold=`tput rmso`
for file in $(grep -l "$search" "$@")
do
	tmp=/tmp/regreplace_$(basename $file)
	sed "s/${search}/${replace}/g" $file >$tmp
	
	echo "${bold}diffs of $file$offbold ('<' = before, '>' = after)"
	diff $file $tmp
	cp $flag $tmp $file
        rm -f $tmp
done