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

set -u -e

. "include/err.sh"
. "include/option.sh"
. "include/git.sh"

eval "$(setvars "" xarch cfgsdir codedir config config_name xlang mode \
    elfdir listfile project target target_dir targets tree _f target1)"

main()
{
	while getopts f:b:m:u:c:x:s:l:n: option; do
		_f="${1}"
		case "${1}" in
		-b) : ;;
		-u) mode="oldconfig" ;;
		-m) mode="menuconfig" ;;
		-c) mode="distclean" ;;
		-x) mode="crossgcc-clean" ;;
		-f) mode="fetch" ;;
		-s) mode="savedefconfig" ;;
		-l) mode="olddefconfig" ;;
		-n) mode="nconfig" ;;
		*) err "Invalid option" ;;
		esac
		shift; project="${OPTARG#src/}"; shift
	done
	[ -z "$_f" ] && err "missing flag (-m/-u/-b/-c/-x/-f/-s/-l/-n)"
	[ -z "$project" ] && err "project name not specified"

	check_project

	_cmd="build_projects"
	[ -f "config/${project}/build.list" ] && _cmd="build_targets"
	$_cmd $@
}

build_projects()
{
	[ $# -gt 0 ] && x_ ./update trees $_f $@
	[ "$mode" = "fetch" ] && eval "fetch_project_repo; return 0;"

	codedir="src/${project}"
	[ -d "$codedir" ] || x_ ./update trees -f "$project"

	if [ "$project" = "uefitool" ]; then
	(
		x_ cd src/uefitool
		cmake UEFIExtract/ || [ -f Makefile ] || \
		    err "build_projects: !cmake UEFIExtract/"
	) || err "can't build cmake on uefiextract"
	fi

	[ "$mode" = "distclean" ] && mode="clean"
	run_make_command || return 0
}

build_targets()
{
	elfdir="elf/${project}"
	[ "$elfdir" = "elf/coreboot" ] && \
		elfdir="elf/coreboot_nopayload_DO_NOT_FLASH"

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

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

	# Build for all targets if no argument is given
	[ $# -gt 0 ] && target1="$1"
	[ "$target1" = "utils" ] && [ "$project" = "coreboot" ] && \
		shift 1
	targets=$(items "$cfgsdir") || \
	    err "Cannot get options for $cfgsdir"
	[ $# -gt 0 ] && targets=$@

	[ -z "$mode" ] && x_ mkdir -p "$elfdir"
	handle_targets
}

handle_targets()
{
	for x in $targets; do
		target="${x}"
		printf "Running 'make %s' for project '%s, target '%s''\n" \
		    "$mode" "$project" "$target"
		[ "$project" != "coreboot" ] || [ -n "$mode" ] || \
		    [ "$target1" = "utils" ] || \
			x_ ./vendor download $target
		x_ handle_defconfig
	done

	[ "$target1" = "utils" ] && [ "$project" = "coreboot" ] && return 0
	[ -z "${mode}" ] || return 0
	printf "Done! The files are stored under %s/\n\n" "$elfdir"
}

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

	[ "$target1" = "utils" ] && [ "$project" = "coreboot" ] && \
		eval "handle_coreboot_utils \"$tree\"; 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"

		[ -n "$mode" ] || check_config || continue
		handle_makefile
		[ -n "$mode" ] || copy_elf
	done
}

handle_src_tree()
{
	target_dir="${cfgsdir}/${target}"
	[ "$mode" = "fetch" ] && eval "fetch_project_trees; return 1;"

	x_ mkdir -p "${elfdir}/${target}"
	eval "$(setvars "" xarch xlang tree)"

	. "${target_dir}/target.cfg" || \
	    err "handle_src_tree ${target_dir}: cannot load target.cfg"

	[ -z "$tree" ] && err "handle_src_tree $project/$tree: tree unset"

	codedir="src/${project}/${tree}"

	if [ ! -d "$codedir" ]; then
		if [ "$mode" = "distclean" ] || \
		    [ "$mode" = "crossgcc-clean" ]; then
			printf "Directory %s missing; skipping clean\n" \
			    "$codedir" 1>&2
			return 1
		fi
		x_ ./update trees -f "$project" "$target"
	fi

	[ "$target1" = "utils" ] && [ "$project" = "coreboot" ] && return 0
	[ -z "$mode" ] || return 0
	check_cross_compiler
}

check_cross_compiler()
{
	for _xarch in $xarch; do
		cbdir="src/coreboot/${tree}"
		[ "$project" != "coreboot" ] && cbdir="src/coreboot/default"

		x_ ./update trees -f coreboot ${cbdir#src/coreboot/}

		export PATH="${PWD}/${cbdir}/util/crossgcc/xgcc/bin:$PATH"
		export CROSS_COMPILE="${xarch% *}-"
		[ -n "${xlang}" ] && export BUILD_LANGUAGES="$xlang"

		[ -d "${cbdir}/util/crossgcc/xgcc/${_xarch}/" ] && continue
		x_ make -C "$cbdir" crossgcc-${_xarch%-*} CPUS=$(nproc)
	done
}

check_config()
{
	[ -f "$config" ] || \
		err "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
		[ -f "$elftest" ] || continue
		printf "Build already exists, so skipping build\n" 1>&2
		return 1
	done
	x_ mkdir -p "$dest_dir"
}

handle_makefile()
{
	x_ make clean -C "$codedir"
	x_ cp "$config" "${codedir}/.config"
	[ -n "$mode" ] || make -C "$codedir" silentoldconfig || \
	    make -C "$codedir" oldconfig || :

	run_make_command || err "handle_makefile $codedir: no makefile!"

	if [ -e "${codedir}/.git" ] && [ "$project" = "u-boot" ] && \
	    [ "$mode" = "distclean" ]; then
		x_ git -C "$codedir" clean -fdx
	elif [ "$mode" = "oldconfig" ] || [ "$mode" = "olddefconfig" ] || \
	    [ "$mode" = "menuconfig" ] || [ "$mode" = "nconfig" ]; then
		x_ cp "${codedir}/.config" "$config"
	elif [ "$mode" = "savedefconfig" ]; then
		x_ cp "${codedir}/defconfig" "$config"
	fi
}

run_make_command()
{
	[ -f "${codedir}/Makefile" ] || [ -f "${codedir}/makefile" ] || \
	    [ -f "${codedir}/GNUmakefile" ] || return 1
	[ "$project" = "coreboot" ] && [ -z "$mode" ] && \
		x_ printf "%s\n" "${version%%-*}" \
		    > "${codedir}/.coreboot-version"

	x_ make $mode -j$(nproc) -C "$codedir"

	[ "$mode" != "clean" ] && return 0
	make -C "$codedir" distclean 2>/dev/null || :
}

copy_elf()
{
	while read -r f; do
		[ ! -f "${codedir}/$f" ] || \
			x_ cp "${codedir}/${f}" "$dest_dir"
	done < "$listfile"
	x_ make clean -C "$codedir"
}

main $@