#!/bin/sh -e
[ $# -ge 1 ] || { echo "usage: $0 version [cmdline]" >&2; exit 1; }
trap 'rm -rf "$tmpd"' EXIT INT
tmpd="$(mktemp -d)/"

# https://bugs.debian.org/1063097
cp "Image-$1.lz4" "mt8173-elm-hana-$1.dtb" "$tmpd"

mkimage -f auto -A arm64                      \
    -T kernel -C lz4 -d "${tmpd}Image-$1.lz4" \
    -b "${tmpd}mt8173-elm-hana-$1.dtb"        \
    "${tmpd}Image.dtb" >&2

printf '\0' > "${tmpd}bootloader"
vbutil_kernel --pack /dev/stdout                                   \
    --keyblock    /usr/share/vboot/devkeys/kernel.keyblock         \
    --signprivate /usr/share/vboot/devkeys/kernel_data_key.vbprivk \
    --version     1                                                \
    --vmlinuz     "${tmpd}Image.dtb"                               \
    --bootloader  "${tmpd}bootloader"                              \
    --config      "${2-"cmdline"}"                                 \
    --arch        arm64