#!/bin/bash
set -e

if [ $# -eq 0 ]; then
    echo "Gives a diff of package lists and currently installed packages"
    echo "Usage: $(basename ${BASH_SOURCE[0]}) list1 [list2] [list3]"
    exit 1
fi

dir=$(dirname ${BASH_SOURCE[0]})

diff <(cat $@ | sort | uniq -u) <($dir/listpackages)