#!/bin/bash
set -e

source $(dirname $0)/version
cd $(dirname $0)/..

ARTIFACTS=$(pwd)/dist/artifacts
CD=${BUILD}/cd
ISO=${ARTIFACTS}/$(echo ${DISTRIB_ID} | tr '[:upper:]' '[:lower:]').iso
CHECKSUM=iso-checksums.txt

## TRADITIONAL MBR BOOT
mkdir -p ${CD}/boot/isolinux

if [ ! -f ${ARTIFACTS}/vmlinuz ] || [ ! -f ${ARTIFACTS}/initrd ]; then
    exit 0
fi

cp ${ARTIFACTS}/initrd                        ${CD}/boot
cp ${ARTIFACTS}/vmlinuz                       ${CD}/boot
cp scripts/isolinux.cfg                       ${CD}/boot/isolinux
cp /usr/lib/ISOLINUX/isolinux.bin             ${CD}/boot/isolinux
cp /usr/lib/syslinux/modules/bios/ldlinux.c32 ${CD}/boot/isolinux


## EFI BOOT
mkdir -p ${CD}/EFI/BOOT
mkdir -p ${CD}/boot/grub
cp scripts/grub.cfg ${CD}/boot/grub
cp -r /usr/lib/grub/x86_64-efi/ ${CD}/boot/grub

(cd ${CD} && grub-mkimage  -O x86_64-efi -o EFI/BOOT/BOOTX64.EFI --config=boot/grub/grub.cfg --compression=auto --prefix='()/boot/grub' disk part_msdos fat iso9660 )

# make the EFI FAT filesystem to boot
EFIIMG=boot/efiboot.img
CDEFI=${CD}/${EFIIMG}
rm -f ${CDEFI}
dd if=/dev/zero of=${CDEFI} bs=4k count=1000
mkfs.vfat ${CDEFI}
mkdir -p tmp/
mount -o loop ${CDEFI} tmp/
cp -r ${CD}/EFI tmp/
umount tmp/
rmdir tmp/

rm -rf ${CD}/EFI


## BUILD THE ISO IMAGE

cd ${CD} && xorriso \
    -as mkisofs \
    -l -J -R -V "${DISTRIB_ID}" \
    -no-emul-boot -boot-load-size 4 -boot-info-table \
    -b boot/isolinux/isolinux.bin -c boot/isolinux/boot.cat \
    -isohybrid-mbr /usr/lib/ISOLINUX/isohdpfx.bin \
    -eltorito-alt-boot \
    -e ${EFIIMG} -no-emul-boot \
    -isohybrid-gpt-basdat \
    -o $ISO ${CD}

cd $(dirname $ISO)
rm -f $CHECKSUM
for algo in sha256 md5; do
    echo "$algo: $(${algo}sum $(basename $ISO))" >> $CHECKSUM
done