git reset with pattern

git-reset-pattern

e() 
{
	echo $1 | grep -E $2 | grep -E '(^M\s|^D\s|^R\s)' | cut -c 3-; 
}

f() 
{
	git st --porcelain | while read line
	do 
		file=$(e "$line" $1)
		file=${file//\"/};
		if [ ! -z "$file" -a "$file" != " " ]
		then 
			echo "reset file: $file"
			git reset HEAD "$file" > /dev/null
			git checkout "$file"
		fi
	done
}

if [ $# = 1 ]
then
	GIT_ROOT=`git rev-parse --show-toplevel`
	(cd "$GIT_ROOT" && f $@)
else
	echo "usage: git reset-pattern <pattern>" >&2
	exit 1
fi