#!/usr/bin/bash
set -e
PARTITION_ROOT=/dev/mapper/ubuntu--vg-ubuntu--lv
mkdir -p /boot/efi/EFI/Linux
update-initramfs -u -k all
LATEST=`ls -t /boot/vmlinuz* | head -1`
VERSION=`file -bL $LATEST | grep -o 'version [^ ]*' | cut -d ' ' -f 2`
# echo "/vmlinuz-$VERSION root=/dev/mapper/vg-root rw loglevel=3 cryptdevice=PARTUUID=$(blkid -o value $PARTITION_ROOT | tail -n 1):lvm:allow-discards rd.luks.options=discard" > /boot/kernel-command-line.txt #Arch command line
echo "/vmlinuz-$VERSION root=$PARTITION_ROOT ro" > /boot/kernel-command-line.txt #Ubuntu command line
objcopy \
  --add-section .osrel="/usr/lib/os-release" --change-section-vma .osrel=0x20000 \
  --add-section .cmdline="/boot/kernel-command-line.txt" --change-section-vma .cmdline=0x30000 \
  --add-section .linux="/boot/vmlinuz-$VERSION" --change-section-vma .linux=0x40000 \
  --add-section .initrd="/boot/initrd.img-$VERSION" --change-section-vma .initrd=0x3000000 \
  "/usr/lib/systemd/boot/efi/linuxx64.efi.stub" "/boot/efi/EFI/Linux/Linux.efi"
cp -v /boot/efi/EFI/Linux/Linux.efi /boot/efi/EFI/BOOT/BOOTX64.EFI