#!/bin/bash

# build the iso
. config || exit 0

set -x
set -e

if ! [ "$1" == "skip" ] ; then

# copy kernel if changed
if [ ${FS}/initrd.img -nt ${ISO}/casper/initrd.lz ] ; then
    sudo cp ${FS}/vmlinuz ${ISO}/casper/vmlinuz
    sudo sh -c "zcat ${FS}/initrd.img | lzma > ${ISO}/casper/initrd.lz"
fi

# manifests
sudo chmod +w ${ISO}/casper/filesystem.manifest
sudo chroot ${FS} dpkg-query -W --showformat='${Package} ${Version}\n' \
    | sudo tee ${ISO}/casper/filesystem.manifest >/dev/null

# squashfs
sudo rm -f ${ISO}/casper/filesystem.squashfs
sudo mksquashfs ${FS} ${ISO}/casper/filesystem.squashfs
printf $(sudo du -sx --block-size=1 ${FS} | cut -f1) \
    | sudo tee ${ISO}/casper/filesystem.size

fi

# md5sums
sudo rm -f md5sum.txt
sudo find ${ISO} -type f -print0 \
    | sudo xargs -0 md5sum \
    | sed -e "s, ${ISO}, .," \
    | grep -v isolinux/boot.cat \
    | grep -v isolinux/isolinux.bin \
    | grep -v md5sum.txt \
    | sudo tee ${ISO}/md5sum.txt >/dev/null

sudo chown -R ${USER} ${ISO}

# build CD
xorriso -as mkisofs \
    -D -r -V "NilmDBuntu ${VERSION}" -cache-inodes -J -l \
    -input-charset utf-8 -o ${OUTPUT} \
    -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot \
    -boot-load-size 4 -boot-info-table \
    -eltorito-alt-boot -e boot/grub/efi.img -no-emul-boot \
    ${ISO}

# fix iso for hybrid booting
isohybrid ${OUTPUT}

set +x
echo "Burn it with:"
echo "  growisofs -dvd-compat -Z /dev/dvd=${OUTPUT}"
echo "or write directly to a USB key"