#!/usr/bin/bash
set -Eeuo pipefail

pending_dir=${NABU_OFFLINE_PENDING_DIR:-/var/lib/nabu-kernel-maintenance/pending.d}
maintenance=${NABU_OFFLINE_MAINTENANCE:-/usr/libexec/nabu-kernel-maintenance}
plymouth=${NABU_OFFLINE_PLYMOUTH:-/usr/bin/plymouth}

# Kernel RPMs only enqueue work.  During a DNF5 offline transaction the normal
# path/timer units are not part of the update target, so complete the queued
# UKI before dnf5-offline-transaction.service is allowed to reach reboot.target.
[[ -d $pending_dir ]] || exit 0
find "$pending_dir" -mindepth 1 -maxdepth 1 -type f -print -quit | grep -q . || exit 0

message='Preparing the updated kernel boot files...'
printf '%s\n' "$message"
if [[ -x $plymouth ]] && "$plymouth" --ping >/dev/null 2>&1; then
    "$plymouth" display-message --text="$message" >/dev/null 2>&1 || :
fi

"$maintenance"

if find "$pending_dir" -mindepth 1 -maxdepth 1 -type f -print -quit | grep -q .; then
    printf 'Kernel boot-file preparation left pending work; refusing silent success.\n' >&2
    exit 1
fi

printf 'Updated kernel boot files are ready.\n'