#!/bin/bash

set -e

if [ "$1" = "-h" -o "$1" = "--help" -o "$2" = "" ]; then
   echo ""
   echo "Create initramfs image from a directory tree"
   echo "Usage: $0 [source_directory] [target_initramfs_file.img]"
   echo ""
   exit 2
fi

(cd "$1"; find . -print | cpio -o -H newc) | xz -f --extreme --check=crc32 >"$2"