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#!/bin/bash
# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
# ex: ts=8 sw=4 sts=4 et filetype=sh

export LANG=C

KERNEL_VERSION="$1"
KERNEL_IMAGE="$2"

[[ -f /etc/os-release ]] && . /etc/os-release

if [[ ! -f /etc/machine-id ]] || [[ ! -s /etc/machine-id ]]; then
    systemd-machine-id-setup
fi

[[ -f /etc/machine-id ]] && read MACHINE_ID < /etc/machine-id

[[ $MACHINE_ID ]] || exit 1
[[ -f $KERNEL_IMAGE ]] || exit 1

INITRDFILE="/boot/initramfs-0-rescue-${MACHINE_ID}.img"
NEW_KERNEL_IMAGE="${KERNEL_IMAGE%/*}/vmlinuz-0-rescue-${MACHINE_ID}"

[[ -f $INITRDFILE ]] && [[ -f $NEW_KERNEL_IMAGE ]] && exit 0

dropindirs_sort()
{
    suffix=$1; shift
    args=("$@")
    files=$(
        while (( $# > 0 )); do
            for i in ${1}/*${suffix}; do
                [[ -f $i ]] && echo ${i##*/}
            done
            shift
        done | sort -Vu
    )

    for f in $files; do
        for d in "${args[@]}"; do
            if [[ -f "$d/$f" ]]; then
                echo "$d/$f"
                continue 2
            fi
        done
    done
}

# source our config dir
for f in $(dropindirs_sort ".conf" "/etc/dracut.conf.d" "/usr/lib/dracut/dracut.conf.d"); do
    [[ -e $f ]] && . "$f"
done

[[ $dracut_rescue_image != "yes" ]] && exit 0

if [[ ! -f $INITRDFILE ]]; then
    dracut --no-hostonly -a "rescue" "$INITRDFILE" "$KERNEL_VERSION"
    ((ret+=$?))
fi

if [[ ! -f $NEW_KERNEL_IMAGE ]]; then
    cp "$KERNEL_IMAGE" "$NEW_KERNEL_IMAGE"
    ((ret+=$?))
fi

new-kernel-pkg --install "$KERNEL_VERSION" --kernel-image "$NEW_KERNEL_IMAGE" --initrdfile "$INITRDFILE" --banner "$NAME $VERSION_ID Rescue $MACHINE_ID"

((ret+=$?))

exit $ret