#!/usr/bin/env bash

# Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
#
# Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# Neither the name of ARM nor the names of its contributors may be used
# to endorse or promote products derived from this software without specific
# prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.

#
# This script uses the following environment variables from the variant
#
# VARIANT - build variant name
# TOP_DIR - workspace root directory
# LINUX_COMPILER - PATH to GCC including CROSS-COMPILE prefix
# BUSYBOX_BUILD_ENABLED - Flag to enable building BusyBox
# BUSYBOX_PATH - sub-directory containing BusyBox code
# BUSYBOX_ARCH - Build architecture (arm)
# BUSYBOX_RAMDISK_PATH - path to where we build the ramdisk
# BUSYBOX_RAMDISK_BUSYBOX_PATH - path to the BB binary
# TARGET_BINS_PLATS - the platforms to create binaries for
# TARGET_{plat} - array of platform parameters, indexed by
# 	ramdisk - the address of the ramdisk per platform
# LINUX_PATH - Path to Linux tree containing DT compiler and include files
# LINUX_OUT_DIR - output directory name
# LINUX_CONFIG_DEFAULT - the default linux build output

do_build ()
{
	if [ "$BUSYBOX_BUILD_ENABLED" == "1" ]; then
		export ARCH=$BUSYBOX_ARCH
		if [ "$ARCH" == "arm" ]; then
			CROSS_COMPILE=$CROSS_COMPILE_32
		fi

		pushd $TOP_DIR/$BUSYBOX_PATH
		mkdir -p $BUSYBOX_OUT_DIR
		make O=$BUSYBOX_OUT_DIR defconfig
		sed -i 's/# CONFIG_STATIC is not set/CONFIG_STATIC=y/g' $BUSYBOX_OUT_DIR/.config
		make O=$BUSYBOX_OUT_DIR -j $PARALLELISM install
		# do some commands to build
		popd
	fi
}

do_clean ()
{
	if [ "$BUSYBOX_BUILD_ENABLED" == "1" ]; then
		export ARCH=$BUSYBOX_ARCH

		pushd $TOP_DIR/$BUSYBOX_PATH
		mkdir -p $BUSYBOX_OUT_DIR
		make O=$BUSYBOX_OUT_DIR clean
		popd
		pushd $TOP_DIR/$BUSYBOX_RAMDISK_PATH
		rm -f ramdisk.img busybox
		popd
	fi
}

do_package ()
{
	if [ "$BUSYBOX_BUILD_ENABLED" == "1" ]; then
		echo "Packaging BUSYBOX... $VARIANT";
		# create the ramdisk
		pushd $TOP_DIR/$BUSYBOX_RAMDISK_PATH
		cp $TOP_DIR/$BUSYBOX_RAMDISK_BUSYBOX_PATH .
		$TOP_DIR/$LINUX_PATH/$LINUX_OUT_DIR/$LINUX_CONFIG_DEFAULT/usr/gen_init_cpio files.txt > ramdisk.img
		popd
		# Copy binary to output folder
		pushd $TOP_DIR
		mkdir -p ${OUTDIR}
		cp $BUSYBOX_RAMDISK_PATH/ramdisk.img \
			${PLATDIR}/ramdisk-busybox.img
		popd
		if [ "$UBOOT_BUILD_ENABLED" == "1" ]; then
			pushd ${PLATDIR}
			for target in $TARGET_BINS_PLATS; do
				local addr=TARGET_$target[ramdisk]
				${UBOOT_MKIMG} -A $BUSYBOX_ARCH -O linux -C none \
					-T ramdisk -n ramdisk \
					-a ${!addr} -e ${!addr} \
					-n "BusyBox ramdisk" \
					-d ramdisk-busybox.img \
					uInitrd-busybox.${!addr}
			done
			popd
		fi
	fi
}

DIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
source $DIR/framework.sh $@