#!/bin/bash -eux

. /build/config/functions

BOOTPART_START=
BOOTPART_END=
BOOT_MOUNTPOINT=
ROOTPART_START=1

case $ARCH in
	ppc64el)
		echo "ppc64el disk images are handled separately"
		exit 0
		;;
	*)
		;;
esac

create_empty_partition_table() {
    apt-get install -qqy parted

    parted "$1" --script -- mklabel msdos
}

create_empty_partition() {
    local disk="$1"
    local part="$2"
    local start="$3"
    local end="$4"
    local bootable="$5"

    parted_prefix="parted $disk --script --"
    ${parted_prefix} mkpart primary "$start" "$end"
    if [ -n "$bootable" ]; then
        ${parted_prefix} set "$part" B
    fi
    ${parted_prefix} print
    ${parted_prefix} align-check opt "$part"
}

disk_image=binary/boot/disk.ext4

create_empty_disk_image "${disk_image}"
create_empty_partition_table "${disk_image}"

ROOTPART=1
ROOT_BOOTABLE=1
if [ -n "$BOOTPART_START" ]; then
	ROOTPART=2
	ROOTPART_START="$BOOTPART_END"
	ROOT_BOOTABLE=
	create_empty_partition "$disk_image" 1 "$BOOTPART_START" "$BOOTPART_END" 1
fi
create_empty_partition "${disk_image}" "$ROOTPART" "$ROOTPART_START" -1 "$ROOT_BOOTABLE"

mount_image "${disk_image}" "$ROOTPART"

# Copy the chroot in to the disk
make_ext4_partition "${rootfs_dev_mapper}"
mkdir mountpoint
mount "${rootfs_dev_mapper}" mountpoint

if [ -n "$BOOT_MOUNTPOINT" ]; then
	boot_dev_mapper="${rootfs_dev_mapper%%[0-9]}1"
	# assume fat32 for now
	mkfs.vfat -n system-boot "$boot_dev_mapper"
	mkdir -p "mountpoint/$BOOT_MOUNTPOINT"
	mount "$boot_dev_mapper" "mountpoint/$BOOT_MOUNTPOINT"
fi

cp -a chroot/* mountpoint/

setup_mountpoint mountpoint

case $ARCH in
    amd64|i386) should_install_grub=1;;
             *) should_install_grub=0;;
esac

if [ "${should_install_grub}" -eq 1 ]; then
    echo "(hd0) ${loop_device}" > mountpoint/tmp/device.map
    chroot mountpoint grub-install ${loop_device}
    chroot mountpoint grub-bios-setup \
        --boot-image=i386-pc/boot.img \
        --core-image=i386-pc/core.img \
        --skip-fs-probe \
        --device-map=/tmp/device.map \
        ${loop_device}

    rm mountpoint/tmp/device.map
fi

if [ "$ARCH" = "s390x" ]; then
    # Do ZIPL install bits

    # Write out cloudy zipl.conf for future kernel updates
    cat << EOF > mountpoint/etc/zipl.conf
# This has been modified by the cloud image build process
[defaultboot]
default=ubuntu

[ubuntu]
target = /boot
image = /boot/vmlinuz
ramdisk = /boot/initrd.img
parameters = root=LABEL=cloudimg-rootfs
EOF

    # Create bootmap file
    mountpoint/sbin/zipl -V \
        --image=mountpoint/boot/vmlinuz \
        --ramdisk=mountpoint/boot/initrd.img \
        --parameters='root=LABEL=cloudimg-rootfs' \
        --target=mountpoint/boot/ \
        --targetbase=/dev/loop0 \
        --targettype=SCSI \
        --targetblocksize=512 \
        --targetoffset=2048

fi

if [ -n "$BOOT_MOUNTPOINT" ]; then
	umount "mountpoint/$BOOT_MOUNTPOINT"
fi

umount_partition mountpoint
rmdir mountpoint

clean_loops
trap - EXIT