#!/bin/bash
set -e


BUILDROOT_MENUCONFIG=no
BUILDROOT_TOOLCHAIN=no
BUILDROOT_KEEPCONFIG=no
UCLIBC_MENUCONFIG=no
BUSYBOX_MENUCONFIG=no
BUILDROOT_DEFCONFIG=no


usage()
{
	echo -e "\nUsage: ./build_buildroot.sh [option]"
	echo -e "\tChoose one of the following options."
#	echo -e "\t-d|--defconfig\t\tMake with defconfig"
	echo -e "\t-m|--menuconfig\t\tCall buildroot menuconfig and exit"
	echo -e "\t-s|--savedefconfig\t\tSave defconfig based on current .config"
	echo -e "\t-t|--toolchain\t\tBuild just the toolchain and exit"
	echo -e "\t-k|--keepconfig\t\tBuild buildroot with current .config"
	echo -e "\t-b|--busiboxconfig\tBusybox menuconfig"
	echo -e "\t-u|--uclibcconfig\tUclibc menuconfig"
	echo -e "\t-h|--help\t\tPrint this help message and exit"
}

mk_defconfig()
{
	cp -v "${BUILDROOT_DEFCONFIG_PATH}"/"${BUILDROOT_DEFCONFIG_FILE}" "${BUILDROOT_ROOT}"/configs/
	make "${BUILDROOT_DEFCONFIG_FILE}" -C $BUILDROOT_ROOT O=$TOOLS_BUILD
}


# Source the directory paths
DIR="${BASH_SOURCE%/*}"
if [[ ! -d "$DIR" ]]; then DIR="$PWD"; fi
. "$DIR/project_structure"

export BASE_DIR


if [[ $# -gt 0 ]]; then
key="$1"

case $key in
-m|--menuconfig)
	BUILDROOT_MENUCONFIG=yes
	shift # past argument
	;;
-s|--savedefconfig)
	BUILDROOT_DEFCONFIG=yes
	shift # past argument
	;;
-t|--toolchain)
	BUILDROOT_TOOLCHAIN=yes
	shift # past argument
	;;
-k|--keepconfig)
	BUILDROOT_KEEPCONFIG=yes
	shift # past argument
	;;
-b|--busyboxconfig)
	BUSYBOX_MENUCONFIG=yes
	shift # past argument
	;;
-u|--uclibcconfig)
	UCLIBC_MENUCONFIG=yes
	shift # past argument
	;;
-h|--help)
	usage
	exit 0
	;;
*)
	echo "Unknown option!"
	usage
	exit 0
	;;
esac
else
	usage
	exit 0
fi

# Check for spaces in the path
case "${BUILDROOT_ROOT}" in
	*\ * )
		echo -e "\n\nBuildroot does not support having spaces in its path!\n"
		echo -e "${BUILDROOT_ROOT}\n"
		exit 0
		;;
esac

cd "${BUILDROOT_ROOT}"

if [[ -z `echo $MCLINUX_ROOT` ]]; then export MCLINUX_ROOT="$MCLINUX_PATH"; fi 

if [[ "${BUILDROOT_MENUCONFIG}" = "yes" ]]; then
	mk_defconfig
	make menuconfig -C $BUILDROOT_ROOT O=$TOOLS_BUILD

	echo -e "\nThe changes will be saved to .config. In order to build with these changes call "
	echo -e "'build_buildroot.sh -k'.\n"
	usage
	exit 0
fi

if [[ "${BUILDROOT_DEFCONFIG}" = "yes" ]]; then
	make savedefconfig -C $BUILDROOT_ROOT O=$TOOLS_BUILD
	cp -v "${BUILDROOT_ROOT}/configs/${BUILDROOT_DEFCONFIG_FILE}" "${BUILDROOT_DEFCONFIG_PATH}"

	usage
	exit 0
fi

if [[ "${BUILDROOT_TOOLCHAIN}" = "yes" ]]; then
	echo -e "\nBuilding only the toolchain"
	make toolchain -C $BUILDROOT_ROOT O=$TOOLS_BUILD $BUILDROOT_PARALLEL_COMPIL
	exit 0
fi

if [[ "${BUSYBOX_MENUCONFIG}" = "yes" ]]; then
	export CONFIGS_DIR=$MCLINUX_ROOT/project-overlay/buildroot/board/elvees_multicore/common
	make busybox-menuconfig -C $BUILDROOT_ROOT O=$TOOLS_BUILD BUSYBOX_CONFIG_FILE=$CONFIGS_DIR/busybox.config
	echo -e "\nThe changes will be saved to /project-overlay/buildroot/board/elvees_multicore/common/busybox.config.\n"
	usage
	exit 0
fi

if [[ "${UCLIBC_MENUCONFIG}" = "yes" ]]; then
	export CONFIGS_DIR=$MCLINUX_ROOT/project-overlay/buildroot/board/elvees_multicore/common
	make uclibc-menuconfig -C $BUILDROOT_ROOT O=$TOOLS_BUILD UCLIBC_CONFIG_FILE=$CONFIGS_DIR/uclibc.config
	echo -e "\nThe changes will be saved to /project-overlay/buildroot/board/elvees_multicore/common/uclibc.config.\n"
	usage
	exit 0
fi

if [[ "${BUILDROOT_KEEPCONFIG}" = "yes" ]]; then
	export CONFIGS_DIR=$MCLINUX_ROOT/project-overlay/buildroot/board/elvees_multicore/common
	make -C $BUILDROOT_ROOT O=$BUILD_DIR UCLIBC_CONFIG_FILE=$CONFIGS_DIR/uclibc.config BUSYBOX_CONFIG_FILE=$CONFIGS_DIR/busybox.config $BUILDROOT_PARALLEL_COMPIL
	#  copy target to the linux target directory
	target_dir="$MCLINUX_ROOT/linux"
	if [[ -d $target_dir ]]
	then
		rm -rf "$target_dir/target"
	else
		mkdir "$target_dir"
	fi
	sudo mv ${BASE_DIR}/target "$target_dir"
fi
exit 0