makefile_space2tabs.sh

#!/bin/sh
# Makefile fixer
# Some old projects that have been touched by dumb text editors
# may have had their makefile tabs turned in spaces. For large
# projects, this is a pia to fix. Use this script in your project
# directory as a quick fix. +1 for the expand command.

set -e

old="$1"
new="$2"
echo "Replacing leading Makefile spaces with 1 hard tab ..."

count=0

for file in $(find . -name 'Makefile'); do 
	if [ -f $file ] && [ -w $file ]; then	
	echo "Fixing $file"
	unexpand --first-only "$file"
	count=$((count+1))
	fi

done

echo "Updated $count files"