#!/bin/sh

usage() { echo >&2 "Usage: $0 [ --not ] [ --set | --unset | --unspecified ] <attr> <ls-files args>..."; }

state=set

if test $1 = "--not"; then
	not=true
	shift
else
	not=false
fi


case $1 in
    --set)         state=set;         shift;;
    --unspecified) state=unspecified; shift;;
    --unset)       state=unset;       shift;;
    -*) usage; exit 1;;
esac

if test -z "$1"; then usage; exit 1; fi

attr=$1
shift

git ls-files "$@" | git check-attr --stdin $attr | if $not; then
	awk -F': ' -v state=$state '{ if ($3 != state) print $1 }'
else
	awk -F': ' -v state=$state '{ if ($3 == state) print $1 }'
fi