# Maintainer: Donald Carr <sirspudd at gmail dot com>

#set -x

pkgname=linux-spudd
# The firmware the kernel produces blows: don't falsify this lightly
# "linux-firmware=20170309.695f2d6-1"
pkgrel=1
pkgver=4.19.r1934.g0841e2ab5143
pkgdesc="Kernel build from head"
arch=("x86_64" "aarch64" "armv7h")
license=("GPL2.1")
_kernel_src_dir=/opt/dev/src/OSS/linux

if [ -z "${LOCAL_PI_VER}" ]; then
    install=spudd.install
fi

_make_cmd="make ${_xcompile_args}"

pkgver() {
  cd $_kernel_src_dir
  git describe --tags | cut -c2- | sed 's/\([^-]*-g\)/r\1/;s/-/./g'
}

build() {
  cd $_kernel_src_dir && git clean -xdf
  cp ${_config_file} ${_kernel_src_dir}/.config
  ${_make_cmd}

  if [ -n "${LOCAL_PI_VER}" ]; then
    ${_make_cmd} dtbs
  fi
}

package() {
  boot_dir="${pkgdir}/boot"
  dtb_dir="${boot_dir}/dtbs/broadcom"
  usr_dir="${pkgdir}/usr"
  firmware_dir="${usr_dir}/lib/firmware"
  preset_dir=${pkgdir}/etc/mkinitcpio.d

  cd $_kernel_src_dir
  INSTALL_MOD_PATH=${usr_dir} ${_make_cmd} modules_install

  mkdir -p ${boot_dir}
  if [ "${LOCAL_PI_VER}" = "3" ]; then
    mkdir -p ${dtb_dir}
    cp arch/arm64/boot/Image ${boot_dir}
    cp ./arch/arm64/boot/dts/broadcom/bcm2837-rpi-3-b.dtb ${dtb_dir}
    cp ./arch/arm64/boot/dts/broadcom/bcm2837-rpi-3-b-plus.dtb ${dtb_dir}
  elif [ "${LOCAL_PI_VER}" = "2" ]; then
    cp arch/arm/boot/zImage ${boot_dir}/vmlinuz-spudd
  else
    cp arch/x86/boot/bzImage ${boot_dir}/vmlinuz-spudd
  fi

  mkdir -p ${preset_dir}
  cp ${startdir}/spudd.preset ${preset_dir}

  rm -Rf ${startdir}/firmware
  if [[ -d ${firmware_dir} ]]; then
    mv ${firmware_dir} ${startdir}
  fi
}

if [ -n "${LOCAL_PI_VER}" ]; then
    case ${LOCAL_PI_VER} in
    2)
        echo "Compiling for the RPi 2 aarch32"
        _config_file="${startdir}/rpi2"
        _xcompile_args="ARCH=arm CROSS_COMPILE=/opt/armv7-rpi2-linux-gnueabihf/bin/armv7-rpi2-linux-gnueabihf-"
    ;;
    3)
        echo "Compiling for the RPi 3 aarch64"
        _config_file="${startdir}/rpi3"
        _xcompile_args="ARCH=arm64 CROSS_COMPILE=/opt/x-tools/aarch64-rpi3-linux-gnu/bin/aarch64-rpi3-linux-gnu-"
    ;;
    *)
        echo "Only supports the rpi3 at this point in time"
        exit 1
    ;;
    esac
else
    echo "Compiling for desktop"
    _config_file="${_kernel_src_dir}/configs/desktop"
fi

_make_cmd="make ${_xcompile_args}"