remaster/src/func/check_dependency

#!/bin/bash
#remaster lib
[ -d "<LIBDIR>" ] || { echo "LIBDIR not exist"; exit 1; }

#check_dependency
# -> 0 | -> 16
function check_dependency() {
	for packet in squashfs-tools xorriso lxc wget sed sendemail; do
		[ "`dpkg -l $packet 2>&1`" == "dpkg-query: Kein Paket gefunden, das auf $packet passt" ] && {
			echo "### ERROR ### Packet $packet not installed"
			return 16
		}
	done
	return 0
}

#this func is standalone executable
[ -n "$1" ] && {
  check_dependency $@
}