#!/bin/bash

set -e
set -o errtrace
trap 'echo Fatal error: script $0 aborting at line $LINENO, command \"$BASH_COMMAND\" returned $?; exit 1' ERR

ENABLE_64BIT_BUILD=false
NUM_JOBS=$(grep -c processor /proc/cpuinfo)

top_dir=$(readlink -e $(dirname $0))
toolchain_dir=$(readlink -e ${top_dir}/../prebuilt/toolchain)
if [ ${ENABLE_64BIT_BUILD} = "true" ]; then
  cross_compiler_dir=${toolchain_dir}/aarch64/bin
  export ARCH=arm64
  export CROSS_COMPILE=aarch64-cros-linux-gnu-
else
  cross_compiler_dir=${toolchain_dir}/armv7a/bin
  export ARCH=arm
  export CROSS_COMPILE=armv7a-cros-linux-gnueabihf-
fi
export PATH=${cross_compiler_dir}:$PATH

function BuildBootloader() {
  local board=$1
  local eureka_src_path=$(readlink -e $2)

  if [ -z ${eureka_src_path} ]; then
    echo "eureka_src_path doesn't exist"
    exit 1
  fi

  # clean previous build
  make distclean
  find . -maxdepth 1 -name "dtb_combined*" -delete
  rm -f combined_dtb.lds

  # build config
  make ipq5018_defconfig
  diff .config ./configs/ipq5018_defconfig

  # make u-boot
  make -j${NUM_JOBS} BOARD_NAME=${board} DEVICE_TREE="${board}" SOURCE_DATE_EPOCH="${U_BOOT_BUILD_TIMESTAMP}" V=1

  if [ ! -e u-boot ]; then
    echo "u-boot build fails!"
    exit 1
  fi

  # convert u-boot from elf to mbn format
  python3 ${top_dir}/../sdk/tools/elftombn.py -f u-boot -o u-boot.mbn

  # install u-boot
  echo "Install u-boot.mbn"
  local product=$(echo ${board} | cut -d'-' -f1)
  mkdir -p ${eureka_src_path}/vendor/qualcomm/${product}/prebuilt/bootloader/
  cp u-boot.mbn ${eureka_src_path}/vendor/qualcomm/${product}/prebuilt/bootloader/bootloader.${board}
}

#########################
####### Main Entry ######
#########################
U_BOOT_BUILD_TIMESTAMP=""
while getopts ":d" arg; do
  case "${arg}" in
    d)
      U_BOOT_BUILD_TIMESTAMP=$(git log -1 -s --format=%ct)
      ;;
    ?)
      exit 1
      ;;
  esac
done
shift $((OPTIND-1))

if (( $# < 2 )); then
  exit 1
else
  BuildBootloader $1 $2
fi