#!/bin/sh

set -eu

case $ARCH in
    amd64)
        ;;
    *)
        exit 0
        ;;
esac

. config/binary

KERNEL=chroot/boot/vmlinuz
INITRD=chroot/boot/initrd.img

mkdir -p "chroot/etc/initramfs-tools/conf.d"
cat > chroot/etc/initramfs-tools/conf.d/casperize.conf <<EOF
export CASPER_GENERATE_UUID=1
EOF

chroot chroot update-initramfs -u

git clone https://git.launchpad.net/~ubuntu-cdimage/debian-cd/+git/ubuntu debian-cd
export BASEDIR=$(readlink -f debian-cd) DIST=$LB_DISTRIBUTION

cat > apt.conf <<EOF
Dir "$(pwd)/chroot";
EOF

case $ARCH in
    amd64)
        mkdir -p "ubuntu-mini-iso/amd64/tree/casper"
        cp "$KERNEL" ubuntu-mini-iso/amd64/tree/casper/filesystem.kernel-generic
        cp "$INITRD" ubuntu-mini-iso/amd64/tree/casper/filesystem.initrd-generic
        APT_CONFIG_amd64=$(pwd)/apt.conf $BASEDIR/tools/boot/$LB_DISTRIBUTION/boot-amd64 1 $(readlink -f ubuntu-mini-iso/amd64/tree)
        # Overwrite the grub.cfg that debian-cd generates by default
        cat > ubuntu-mini-iso/amd64/tree/boot/grub/grub.cfg <<EOF
menuentry "Choose an Ubuntu version to install" {
        set gfxpayload=keep
        linux /casper/vmlinuz iso-chooser-menu ip=dhcp ---
        initrd /casper/initrd
}
EOF
        rm -f ubuntu-mini-iso/amd64/tree/boot/grub/loopback.cfg ubuntu-mini-iso/amd64/tree/boot/memtest*.bin
        ;;
esac

mkdir -p ubuntu-mini-iso/$ARCH/tree/.disk

touch ubuntu-mini-iso/$ARCH/tree/.disk/base_installable

tmpdir=$(mktemp -d)
unmkinitramfs $INITRD $tmpdir
if [ -e "$tmpdir/main/conf/uuid.conf" ]; then
    uuid_conf="$tmpdir/main/conf/uuid.conf"
elif [ -e "$tmpdir/conf/uuid.conf" ]; then
    uuid_conf="$tmpdir/conf/uuid.conf"
else
    echo "uuid.conf not found"
    exit 1
fi
cp "$uuid_conf" ubuntu-mini-iso/$ARCH/tree/.disk/casper-uuid-generic
rm -fr $tmpdir

cat > ubuntu-mini-iso/$ARCH/tree/.disk/cd_type <<EOF
full_cd/single
EOF

version=$(distro-info --fullname --series=$LB_DISTRIBUTION \
          | sed s'/^Ubuntu/ubuntu-mini-iso/')

cat > ubuntu-mini-iso/$ARCH/tree/.disk/info <<EOF
$version - $ARCH ($BUILDSTAMP)
EOF

dest="${PWD}/livecd.${PROJECT}.iso"

cd ubuntu-mini-iso/$ARCH
xorriso -as mkisofs $(cat 1.mkisofs_opts) tree -o $dest
cd ../..

rm -rf ubuntu-mini-iso