#!/usr/bin/env sh

#  helper script: builds U-Boot source code
#
#	Copyright (C) 2020, 2021 Leah Rowe <info@minifree.org>
#	Copyright (C) 2021, 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
#	Copyright (C) 2022 Alper Nebi Yasak <alpernebiyasak@gmail.com>
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

[ "x${DEBUG+set}" = 'xset' ] && set -v
set -u -e

RET=0

# Build U-Boot
# ---------------------------------------------------------------------

printf "Building U-Boot payloads\n"

# Build for all boards if no argument is given
if [ "$#" -eq 0 ]; then
	for board_dir in resources/u-boot/*; do
		if [ -d "${board_dir}/config/" ]; then
			set -- "$@" "${board_dir#resources/u-boot/}"
		fi
	done
fi

[ ! -d "payload/" ] && mkdir -p payload/
[ ! -d "payload/u-boot" ] && mkdir -p payload/u-boot/

# Appends additional version info to U-Boot
our_version="$(cat version)"
projectname="$(cat projectname)"
export LOCALVERSION="-${projectname}-${our_version}"

for board in "$@"; do
	board_dir="resources/u-boot/${board}"
	rm -rf "payload/u-boot/${board}"
	mkdir -p "payload/u-boot/${board}"

	ubtree="undefined"
	arch="undefined"

	if [ ! -f "${board_dir}/board.cfg" ]; then
		printf "%s: Target %s does not have a board.cfg. Skipping build.\n" \
			"build/payload/u-boot" "${board}"
		RET=1
		continue
	fi

	# Override the above defaults using board.cfg
	. "${board_dir}/board.cfg" # source

	if [ "${ubtree}" = "undefined" ]; then
		printf "%s: Target %s does not define a U-Boot tree. Skipping build.\n" \
			"build/payload/u-boot" "${board}"
		RET=1
		continue
	fi
	if [ "${arch}" = "undefined" ]; then
		printf "%s: Target %s does not define a CPU type. Skipping build.\n" \
			"build/payload/u-boot" "${board}"
		RET=1
		continue
	fi

	ubdir="u-boot/${board}"
	if [ "${board}" != "${ubtree}" ]; then
		ubdir="u-boot/${ubtree}"
	fi

	if [ ! -d "${ubdir}" ]; then
		./download u-boot "$board"
	fi

	if [ ! -d "${ubdir}" ]; then
		printf "%s: Failed to download U-Boot for target %s. Skipping build.\n" \
			"build/payload/u-boot" "${board}"
		RET=1
		continue
	fi

	for config in "${board_dir}/config"/*; do
		if [ ! -f "${config}" ]; then
			printf "%s: Target %s has no configs to build for. Skipping build.\n" \
				"build/payload/u-boot" "${board}"
			RET=1
			continue
		fi

		config_name="${config#$board_dir/config/}"
		if [ "$config_name" = "default" ]; then
			dest_dir="payload/u-boot/${board}"
		else
			dest_dir="payload/u-boot/${board}/${config_name}"
		fi
		mkdir -p "${dest_dir}"

		printf "%s: Building for target %s (config %s).\n" \
			"build/payload/u-boot" "${board}" "${config_name}"

		make -C "${ubdir}" distclean

		cp "${config}" "${ubdir}/.config"
		make -C "${ubdir}" olddefconfig
		make -C "${ubdir}" -j"$(nproc)" all

		for f in "${ubdir}"/u-boot "${ubdir}"/u-boot.bin "${ubdir}"/u-boot.dtb \
			"${ubdir}"/u-boot.img "${ubdir}"/u-boot.itb "${ubdir}"/u-boot.elf; do
			if [ -f "$f" ]; then
				mv "$f" "${dest_dir}/"
			fi
		done

		make -C "${ubdir}" distclean

		printf "%s: Built for target %s (config %s).\n" \
			"build/payload/u-boot" "${board}" "${config_name}"
	done
done

printf "Done! U-Boot files are in payload/u-boot/\n\n"
exit $RET

# ------------------- DONE ----------------------