#! /bin/bash -ex

#####################
# Configuration     # 							     
#####################

UBOOT_URL="http://ftp.denx.de/pub/u-boot"
UBOOT_FILE="< uboot-file >"

#####################
# Script            #
#####################

function dl_src {
  wget -N ${UBOOT_URL}/${UBOOT_FILE} -P ${EMBEDUX_TMP}
  tar -xf ${EMBEDUX_TMP}/${UBOOT_FILE} --strip 1 -C ${SRC_DIR}
}

function make_defconfig {
  make -C ${SRC_DIR} ${UBOOT_CONFIG}
}

function make_src {
  make -C ${SRC_DIR} -j$(nproc)
}

function provide_output {
  OUTPUT_DIR="output"
  OUTPUT_PREFIX="$(git rev-parse --abbrev-ref HEAD)_$(date '+%Y%m%d%H%M%S')_$(git rev-parse --short HEAD)"
  OUTPUT_SUFFIX="uboot.tar.gz"
  OUTPUT_FILE="${OUTPUT_PREFIX}_${OUTPUT_SUFFIX}"

  mkdir -p ${OUTPUT_DIR}
  tar -czf ${OUTPUT_DIR}/${OUTPUT_FILE} -C ${SRC_DIR} ${FIRMWARE_IMG}
}

function build {
  dl_src
  make_defconfig
  make_src
  if [ "$(type -t pre_output)" == "function" ]
    then pre_output
  fi
  provide_output
  if [ "$(type -t post_output)" == "function" ]
    then post_output
  fi
}