build() {
    load_kdumpst_config

    # A valid makedumpfile is essential for the kdump initrd creation.
    if ! command -v makedumpfile 1>/dev/null; then
        logger "kdumpst: failed to create minimal initrd, makedumpfile is missing"
        exit 1
    fi

    add_binary /usr/bin/date
    add_binary /usr/bin/sync
    add_binary "$(command -v makedumpfile)"

    #  Copying kdump config/lib files is essential for a functional kdump.
    add_full_dir /usr/share/kdumpst.d/
    add_full_dir /usr/lib/kdumpst/

    #  We need to derive the proper place to save the dump from the
    #  config files, in a way that makes possible to mount it in early boot.
    DEVNODE="$(findmnt -n -o SOURCE --target "${MOUNT_FOLDER}")"
    if [ -z "${DEVNODE}" ]; then
        logger "kdumpst: error on devnode discovery"
        exit 1
    fi
    echo "${DEVNODE}" > "${BUILDROOT}"/usr/lib/kdumpst/kdump.mnt

    TGT="$(findmnt -n -o TARGET --target "${MOUNT_FOLDER}")"
    if [ -z "${TGT}" ]; then
        logger "kdumpst: error on base folder discovery"
        exit 1
    fi

    BASE_FLD="${MOUNT_FOLDER#*$TGT}"
    echo "${BASE_FLD}" > "${BUILDROOT}"/usr/lib/kdumpst/kdump.dir

    #  Finally, we shouldn't have DRM/GPU drivers and firmwares here,
    #  but...just in case, let's remove all of that nevertheless.
    #  Our list includes the most common FWs/drivers (amd, i915, nvidia).
    rm -rf "${BUILDROOT}"/usr/lib/firmware/{amdgpu,i915,nvidia,radeon}
    rm -rf "${BUILDROOT}"/usr/lib/modules/*/kernel/drivers/gpu/drm/{amd,i915,nouveau,radeon}

    add_runscript
}

help() {
    cat <<HELPEOF
Hook responsible for creating the kdumpst minimal kdump initramfs.
HELPEOF
}

# vim: set ft=sh ts=4 sw=4 et: