mkosi.postinst.chroot

#!/bin/bash

# Linux kernel x86 boot executable bzImage, version 5.15.0-73-generic …
if [[ -e "/boot/vmlinuz" ]]; then
    read -r _ _ _ _ _ _ _ KVER _ < <(file -bL "/boot/vmlinuz")
else
    KVER="$(rpm -q kernel --queryformat='%{REQUIREVERSION}')"
fi

for _dir in BOOT systemd Linux; do
    mkdir -p "/boot/efi/EFI/$_dir"
done
for _path in systemd/systemd-bootx64.efi BOOT/BOOTX64.efi; do
    cp /usr/lib/systemd/boot/efi/systemd-bootx64.efi "/boot/efi/EFI/$_path"
done
mkdir -p /boot/efi/loader/entries

dracut --kver "$KVER"

printf 'title      Ubuntu 22.04 LTS (OSISM HV)
version    %s
efi        /EFI/Linux/linux-%s.efi
' "$KVER" "$KVER" > "/boot/efi/loader/entries/${KVER}.conf"