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#!/usr/bin/env sh
# SPDX-License-Identifier: GPL-3.0-or-later
# SPDX-FileCopyrightText: 2022 Alper Nebi Yasak <alpernebiyasak@gmail.com>
# SPDX-FileCopyrightText: 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
# SPDX-FileCopyrightText: 2023 Leah Rowe <leah@libreboot.org>

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

. "include/err.sh"

read projectname < projectname
read our_version < version

export LOCALVERSION="-${projectname}-${our_version}"

arch=""
cfgsdir=""
codedir=""
config=""
config_name=""
crossgcc_ada=""
elfdir=""
listfile=""
mode=""
project=""
romtype=""
target=""
target_dir=""
targets=""
tree=""
cbfstool=""

tmpclean="$(mktemp -d -t makeclean.XXXXXXXXXX)" || \
    fail "can't make tmpclean dir"

main()
{
	while getopts b:m:u:c:x: option
	do
		case "${1}" in
		-b) mode="all" ;;
		-u) mode="oldconfig" ;;
		-m) mode="menuconfig" ;;
		-c) mode="distclean" ;;
		-x) mode="crossgcc-clean" ;;
		*) fail "Invalid option" ;;
		esac
		shift; project="${OPTARG}"; shift
	done
	[ -z "${mode}" ] && fail "mode not given (-m, -u, -b, -c or -x)"

	handle_dependencies $@
	handle_targets
}

handle_dependencies()
{
	elfdir="elf/${project}"

	cfgsdir="config/${project}"
	[ -d "${cfgsdir}" ] || fail "directory, ${cfgsdir}, does not exist"

	listfile="${cfgsdir}/build.list"
	[ -f "${listfile}" ] || fail "list file, ${listfile}, does not exist"

	# Build for all targets if no argument is given
	targets=$(./build command options "${cfgsdir}") || \
	    fail "Cannot get options for ${cfgsdir}"
	[ $# -gt 0 ] && targets=$@

	[ -d "${elfdir}" ] || [ "${mode}" != "all" ] || \
		mkdir -p "${elfdir}/" || fail "can't create directory ${elfdir}"
}

handle_targets()
{
	for x in ${targets}; do
		target="${x}"
		printf "Running 'make %s' for project '%s, target '%s''\n" \
		    "${mode}" "${project}" "${target}"
		[ "${project}" != "coreboot" ] || [ "${mode}" != "all" ] || \
			./update blobs download ${target} || fail "blobutil"
		handle_defconfig || fail "error handling config file"
	done

	if [ "${mode}" = "all" ]; then
		printf "Done! The files are stored under %s/\n\n" "${elfdir}"
	fi
}

handle_defconfig()
{
	handle_src_tree "${target}" || return 0

	for y in "${target_dir}/config"/*; do
		[ -f "${y}" ] || continue
		config="${y}"
		config_name="${config#$target_dir/config/}"

		printf "handle/make/config %s %s: handling config %s\n" \
		    "${project}" "${target}" "${config_name}"

		[ "${mode}" != "all" ] || check_config || continue
		run_make_command
		[ "${mode}" != "all" ] || copy_elf
	done
}

handle_src_tree()
{
	target_dir="${cfgsdir}/${target}"
	mkdir -p "${elfdir}/${target}" || \
	    fail "handle_src_tree: !mkdir -p ${elfdir}/${target}"

	tree="undefined"
	arch="undefined"
	romtype="normal"

	[ ! -f "${target_dir}/target.cfg" ] && \
		fail "handle_src_tree: ${target_dir}: missing target.cfg"

	# Override the above defaults using target.cfg
	. "${target_dir}/target.cfg" # source

	[ "${tree}" = "undefined" ] && \
		fail "handle_src_tree: ${target_dir}: tree undefined"
	[ "${arch}" = "undefined" ] && \
		fail "handle_src_tree: ${target_dir}: undefined cpu type"

	codedir="${project}/${tree}"
	if [ ! -d "${codedir}" ]; then
		if [ "${mode}" = "distclean" ] || \
		    [ "${mode}" = "crossgcc-clean" ]; then
			printf "Directory %s doesn't exist; skipping clean\n" \
			    "${codedir}" 1>&2
			return 1
		fi
		./update project trees "${project}" "${target}" || \
		    fail "handle_src_tree: can't fetch ${project}/${target}"
	elif [ "${mode}" = "distclean" ] || \
	    [ "${mode}" = "crossgcc-clean" ]; then
		[ -f "${tmpclean}/${tree}" ] && return 1
		touch "${tmpclean}/${tree}"
	fi

	# u-boot and coreboot are both compiled with coreboot's crossgcc
	if [ "${project}" = "coreboot" ] || [ "${project}" = "u-boot" ]; then
		[ "${mode}" != "all" ] || check_cross_compiler || \
		    fail "handle_src_tree ${project}/${target}: crossgcc"
		cbfstool="cbutils/${tree}/cbfstool"
		[ -f "${cbfstool}" ] || ./build coreboot utils "${tree}" || \
		    fail "handle_src_tree: cannot build cbfstool"
	fi
}

# set up cross-compiler (coreboot crossgcc) for u-boot and coreboot
# (seabios and grub currently use hostcc, not crossgcc)
check_cross_compiler()
{
	[ "${crossgcc_ada}" = "y" ] || [ "${crossgcc_ada}" = "n" ] || \
		crossgcc_ada="y"
	[ "${crossgcc_ada}" != "y" ] && \
		export BUILD_LANGUAGES=c

	cbdir="coreboot/${tree}"
	[ "${project}" != "coreboot" ] && \
		cbdir="coreboot/default" # not u-boot (e.g. linux will use it)
	[ "${project}" = "u-boot" ] && \
		cbdir="coreboot/cros" # u-boot only used on coreboot/cros
	# only true if not building coreboot:
	ctarget="${cbdir#coreboot/}"
	[ -d "${cbdir}" ] || \
		./update project trees coreboot ${ctarget} || \
		    fail "check_cross_compiler: can't fetch coreboot/${ctarget}"

	if [ "${arch}" = "x86_32" ] || [ "${arch}" = "x86_64" ]; then
		[ -d "${cbdir}/util/crossgcc/xgcc/i386-elf/" ] || \
			make -C "${cbdir}" crossgcc-i386 CPUS=$(nproc) || \
			    return 1
		case "$(uname -m)" in
			x86*|i*86|amd64) : ;;
			*) export CROSS_COMPILE=i386-elf- ;;
		esac
	elif [ "${arch}" = "ARMv7" ]; then
		[ -d "${cbdir}/util/crossgcc/xgcc/arm-eabi/" ] || \
			make -C "${cbdir}" crossgcc-arm CPUS=$(nproc) || \
			    return 1
		case "$(uname -m)" in
			arm|arm32|armv6*|armv7*) : ;;
			*) export CROSS_COMPILE=arm-eabi- ;;
		esac
	elif [ "${arch}" = "AArch64" ]; then
		[ -d "${cbdir}/util/crossgcc/xgcc/aarch64-elf/" ] || \
			make -C "${cbdir}" crossgcc-aarch64 CPUS=$(nproc) || \
			    return 1
		# aarch64 also needs armv7 toolchain for arm-trusted-firmware
		[ -d "${cbdir}/util/crossgcc/xgcc/arm-eabi/" ] || \
			make -C "${cbdir}" crossgcc-arm CPUS=$(nproc) || \
			    return 1
		case "$(uname -m)" in
			arm64|aarch64) : ;;
			*) export CROSS_COMPILE=aarch64-elf- ;;
		esac
	fi

	# we *must* ensure that u-boot's build system uses crossgcc first
	export PATH="$(pwd)/${cbdir}/util/crossgcc/xgcc/bin:$PATH"
}

check_config()
{
	[ ! -f "${config}" ] && \
		fail "check_config: ${project}/${target}: configs missing"

	dest_dir="${elfdir}/${target}/${config_name}"
	# TODO: very hacky check. do it properly (based on build.list)
	for elftest in "${dest_dir}"/*; do
		if [ -f "${elftest}" ]; then
			printf "Build already exists, so skipping build\n" 1>&2
			return 1
		fi
	done
	mkdir -p "${dest_dir}" || \
	    fail "check_config: cannot mkdir: ${dest_dir}"
}

run_make_command()
{
	./handle make file -c "${codedir}" || \
	    fail "run_make_command: make distclean/clean failed"

	cp "${config}" "${codedir}/.config" || \
	    fail "run_make_command: can't copy config for: ${project}/${target}"
	[ "${mode}" != "all" ] || make -C "${codedir}" silentoldconfig || \
	    make -C "${codedir}" oldconfig || : # don't error on oldconfig

	if [ "${project}" = "coreboot" ] && [ "${mode}" = "all" ]; then
		printf "%s\n" "${our_version}" >"${codedir}/.coreboot-version" \
		    || fail "run_make_command: ${codedir}: can't set version"
	fi
	make -C "${codedir}" -j$(nproc) ${mode} || \
	    fail "run_make: !make-${mode}: ${codedir} (${project}/${target})"
	if [ -e "${codedir}/.git" ] && [ "${project}" = "u-boot" ] && \
	    [ "${mode}" = "distclean" ]; then
		git -C "${codedir}" clean -fdx || \
		    fail "run_make_command: ${codedir}: cannot clean u-boot git"
	elif [ "${mode}" = "oldconfig" ] || [ "${mode}" = "menuconfig" ]; then	
		cp "${codedir}/.config" "${config}" || \
		    fail "run_make: can't edit config: ${project}/${target}"
	fi
}

copy_elf()
{
	if [ "${project}" = "coreboot" ]; then
		modify_coreboot_rom || \
		    fail "copy_elf: cannot prepare coreboot image"
	fi

	while read f; do
		[ ! -f "${codedir}/$f" ] || \
		    cp "${codedir}/${f}" "${dest_dir}/" || \
		    fail "copy_elf: cannot copy elf file"
	done < ${listfile}

	./handle make file -c "${codedir}" || \
	    fail "copy_elf: clean: ${codedir} (${project}/${target})"
}

modify_coreboot_rom()
{
	rompath="${codedir}/build/coreboot.rom"
	[ -f "${rompath}" ] || \
	    fail "modify_coreboot_rom: does not exist: ${rompath}"
	tmprom="$(mktemp -t rom.XXXXXXXXXX)"
	rm -f "${tmprom}" || \
	    fail "modify_coreboot_rom prep: cannot remove tmprom"

	if [ "${romtype}" = "d8d16sas" ]; then
		# pike2008 roms hang seabios. an empty rom will override
		# the built-in one, thus disabling all execution of it
		touch "${tmprom}" || \
		    fail "modify_coreboot_rom: cannot create fake oprom"
		for deviceID in "0072" "3050"; do
			"${cbfstool}" "${rompath}" add -f "${tmprom}" \
			    -n "pci1000,${deviceID}.rom" -t raw || \
			    fail "modify_coreboot_rom: can't insert fake rom"
		done
	elif [ "${romtype}" = "i945 laptop" ]; then
		# for bucts-based installation method from factory bios
		dd if="${rompath}" of="${tmprom}" bs=1 \
		    skip=$(($(stat -c %s "${rompath}") - 0x10000)) \
		    count=64k || \
		    fail "modify_coreboot_rom: can't read i945 bootblock"
		dd if="${tmprom}" of="${rompath}" bs=1 \
		    seek=$(($(stat -c %s "${rompath}") - 0x20000)) \
		    count=64k conv=notrunc || \
		    fail "modify_coreboot_rom: can't write i945 bootblock"
	fi
	rm -f "${tmprom}" || \
	    fail "modify_coreboot_rom: cannot remove tmprom"
}

fail()
{
	[ -z "${codedir}" ] || ./handle make file -c "${codedir}" || :
	err "${1}"
}

main $@