#!/bin/bash
# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (C) 2023 JELOS (https://github.com/JustEnoughLinuxOS)

###
### Simple script to build JELOS
###

if [ !"${ARCH}" == true ]
then
  echo "export ARCH before building."
  exit 1
fi

. config/options ""
. projects/${PROJECT}/devices/${DEVICE}/options

echo "Building ${DISTRO} for ${DEVICE}"

if [ "${ENABLE_32BIT}" == "true" ]
then
  PKG_CLEAN+=" ${CLEAN_EMU_32BIT}"
fi

# If DEVICE_ROOT is defined and not the device being built, make sure that the
# build folder is a link to root rather than a folder.

if [ -n "${DEVICE_ROOT}" ]
then
  if [ ! "${DEVICE_ROOT}" = "${DEVICE}" ]
  then
    # Ensure there isn't a left over build directory.
    if [ -d "build.${DISTRO}-${DEVICE}.${ARCH}" ]
    then
      echo "Removing stale build root."
      rm -rf build.${DISTRO}-${DEVICE}.${ARCH}
    fi

    # Ensure the DEVICE_ROOT is built before DEVICE
    if [ ! -d "build.${DISTRO}-${DEVICE_ROOT}.${ARCH}" ]
    then
        echo "ERROR: Can't find build root build.${DISTRO}-${DEVICE_ROOT}.${ARCH}"
        echo "You need to build ${DEVICE_ROOT} before ${DEVICE}"
        exit 1
    fi

    # Link back to the DEVICE_ROOT so we can re-use the build directory to save space.
    if [ ! -L "build.${DISTRO}-${DEVICE}.${ARCH}" ]
    then
      ln -sf build.${DISTRO}-${DEVICE_ROOT}.${ARCH} build.${DISTRO}-${DEVICE}.${ARCH}
    fi

    # If sources are split between devices, make sure we link it.
    if [ -d "sources-${DEVICE_ROOT}" ] && \
       [ ! -L "sources-${DEVICE}" ]
    then
      ln -sf sources-${DEVICE_ROOT} sources-${DEVICE}
    fi
  fi
  PKG_CLEAN+=" ${CLEAN_DEVICE_ROOT}"
elif [ -n "$BASE_DEVICE" ]
then
  build_dir="build.${DISTRO}-${DEVICE}.${ARCH}"
  # not the best check but the build gets created before this
  if [ ! -d "${build_dir}/.threads" ]; then
    build_dir_base="build.${DISTRO}-${BASE_DEVICE}.${ARCH}"
    echo "$build_dir_base"
    if [ -d "$build_dir_base" ]; then
      echo "Setting up ${DEVICE} build dir with ${BASE_DEVICE} as base"
      mkdir -p ${build_dir}
      mkdir -p ${build_dir}/.stamps
      ln -sr -t ${build_dir} ${build_dir_base}/*/
      ln -sr -t ${build_dir}/.stamps ${build_dir_base}/.stamps/*/
      mkdir -p ${build_dir}/image
      rsync -a ${build_dir_base}/image/ ${build_dir}/image/
      rm -f ${build_dir}/linux*
      rm -f ${build_dir}/.stamps/linux*
      rm -rf ${build_dir}/image/.stamps/linux*
    else
      echo "Base directory: $build_dir_base doesn't exists. Exiting..."
      exit 1
    fi
  else
    echo "Build directory already exist, continue without setting up base device."
  fi
fi

# Clean necessary packages.
PKG_CLEAN+=" ${CLEAN_NETWORK} ${CLEAN_OS_BASE} ${CLEAN_PACKAGES}"

if [ ! -n "${DIRTY}" ]
then
  # Clean a few packages to ensure the build date and version are updated
  for package in ${PKG_CLEAN}
  do
    echo "Clean: ${package}"
    ./scripts/clean ${package} 2>/dev/null ||:
  done
  rm -rf build.${DISTRO}-${DEVICE_ROOT}.${ARCH}/{.stamps/initramfs,initramfs}
fi

# Clean out old builds before starting the new one.
echo "Prune old releases: ${DISTRO}-${DEVICE}.${ARCH}-*"
rm -f ./release/${DISTRO}-${DEVICE}.${ARCH}-*

# Remove the image root as it should be regenerated for every build.
rm -rf ./build.${DISTRO}-${DEVICE}.${ARCH}/image

case ${ARCH} in
  arm)
    [ "${BASE_ONLY}" == "true" ] || [ ! "${ENABLE_32BIT}" == "true" ] && exit 0
    export PKG_BUILD_PERF=no
    scripts/build_compat arm
    scripts/install arm
  ;;
  i686)
    [ "${BASE_ONLY}" == "true" ] || [ ! "${ENABLE_32BIT}" == "true" ] && exit 0
    export PKG_BUILD_PERF=no
    scripts/build_compat x86
    scripts/install x86
  ;;
  *)
    make image
esac

if [ ! $? == 0 ]
then
  echo "Build failed..exiting."
  exit 1
fi