#!/bin/bash
#* Copyright (c) 2020-2022 Intel Corporation.
# postinst script for acrn kernel
set -e

if [ -f /usr/lib/grub/grub-mkconfig_lib ]; then
  . /usr/lib/grub/grub-mkconfig_lib
  LX=linux16
elif [ -f /usr/lib/grub/update-grub_lib ]; then
  . /usr/lib/grub/update-grub_lib
  LX=linux
else
  # no grub file, so we notify and exit gracefully
  echo "Cannot find grub config file, exiting." >&2
  exit 0
fi

filename="/etc/grub.d/40_custom"
menu=$(grep ACRN_deb_multiboot2 ${filename}) || true

type=$(lsblk -l |awk '$NF == "/" {print $1}')
pattern='^/dev/.* UUID="([^"]+)".* PARTUUID="([^"]+)"'
while IFS= read -r line; do
    if [[ $line =~ $pattern ]]; then
        uuid="${BASH_REMATCH[1]}"
        partuuid="${BASH_REMATCH[2]}"
    fi
done < <(blkid |grep ext4 |grep ${type})

if ls /boot/vmlinuz*acrn-service-vm* 1> /dev/null 2>&1;then
    service_vm_kernel=$(ls -tr /boot/vmlinuz-*acrn-service-vm* | tail -1)
else
    service_vm_kernel=$(ls /boot/vmlinuz-* | tail -1)
fi

if [ -z "$menu" ];then
cat>"${filename}"<<EOF
    #!/bin/sh
    exec tail -n +3 \$0
    menuentry 'ACRN multiboot2 ' --id ACRN_deb_multiboot2 {
            load_video
            insmod gzio
            insmod part_gpt
            insmod ext2
        search --no-floppy --fs-uuid  --set $uuid
    multiboot2 /boot/acrn.bin root=PARTUUID=$partuuid

        }

EOF
fi

sed -i '/Linux_bzImage/d' ${filename} || true
sed -i '/multiboot2 \/boot/a\module2 '$service_vm_kernel' Linux_bzImage' ${filename}

sync