#!/usr/bin/env sh
# SPDX-License-Identifier: MIT
# SPDX-FileCopyrightText: 2020-2023 Leah Rowe <leah@libreboot.org>

set -u -e

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

eval "$(setvars "" vdir relname src_dirname srcdir _xm target romdir \
    microcode_required mode)"

main()
{
	vdir="release"
	while getopts d:m: option; do
		[ -z "${OPTARG}" ] && err "Empty argument not allowed"
		case "${option}" in
		d) vdir="${OPTARG}" ;;
		m) mode="${OPTARG}" ;;
		*) err "Invalid option" ;;
		esac
	done

	vdir="${vdir}/${version}"
	relname="${projectname}-${version}"
	src_dirname="${relname}_src"
	srcdir="${vdir}/${src_dirname}"

	[ -e "${vdir}" ] && err "already exists: \"${vdir}\""

	mkvdir
	build_release

	printf "DONE! Check release files under %s\n" "${vdir}"
}

mkvdir()
{
	mkdir -p "${vdir}" || err "mkvdir: !mkdir -p \"${vdir}\""
	git clone . "${srcdir}" || err "mkdir: !gitclone \"${srcdir}\""
	insert_version_files "${srcdir}" || err "mkvdir ${srcdir}: versionfile"
}

build_release()
{
	_xm="build_release ${vdir}"
	(
	cd "${srcdir}" || err "${_xm}: !cd \"${srcdir}\""
	fetch_trees
	x_ mv src/docs docs
	) || err "can't create release files"
	(
	cd "${srcdir%/*}" || err "${_xm}: mktarball \"${srcdir}\""
	mktarball "${srcdir##*/}" "${srcdir##*/}.tar.xz" || err "${_xm}: mksrc"
	) || err "can't create src tarball"
	[ "${mode}" = "src" ] && return 0

	(
	cd "${srcdir}" || err "${_xm}: 2 !cd \"${srcdir}\""
	mkrom_images
	) || err "can't build rom images"

	rm -Rf "${srcdir}" || err "!rm -Rf ${srcdir}"
}

fetch_trees()
{
	for x in config/git/*; do
		[ ! -f "${x}" ] || ./update trees -f "${x#config/git/}" || \
		    err "${_xm}: fetch ${x#config/git/}"
	done
	for x in config/*/build.list; do
		[ -f "${x}" ] || continue
		xp="${x#*/}"; xp="${xp%/*}"
		[ -L "${xp}" ] || rm -Rf "src/${xp}/${xp}" || \
		    err "!rm -Rf \"src/${xp}/${xp}\""
	done

	find . -name ".git" -exec rm -Rf {} + || err "${_xm}: rm .git"
	find . -name ".gitmodules" -exec rm -Rf {} + || err "${_xm}: rm .gitmod"
	x_ rm -Rf tmp .git
}

mkrom_images()
{
	x_ mkdir -p "vendorfiles/x201/"
	dd if=/dev/zero of="vendorfiles/x201/me.bin" \
	    bs=68k count=1 || err "mkvdir: can't make fake x201 me.bin"

	./build roms all || err "${_xm}: roms-all"
	./build serprog rp2040 || err "${_xm}: rp2040"
	./build serprog stm32 || err "${_xm}: stm32"

	for rombuild in bin/*; do
		[ -d "${rombuild}" ] || continue
		handle_rom_archive "${rombuild}"
	done

	mv "release/${version}/roms/" ../roms || err "${_xm}: copy roms/"
}

handle_rom_archive()
{
	builddir="${1}"
	romdir="tmp/romdir"
	rm -Rf "${romdir}" || err "!rm romdir, handle_rom_archive"
	target="${builddir##*/}"

	if [ ! -f "config/coreboot/${target}/target.cfg" ]; then
		# No config, just make a tarball
		tarball="release/${version}/roms/${relname}_${target}.tar.xz"
		insert_copying_files "${builddir}" || \
		    err "!insert copy, handle, ${builddir}"
		mktarball "${builddir}" "${tarball}"
		return 0
	fi

	romdir="${romdir}/bin/${target}"
	mkdir -p "${romdir}" || err "!mkdir -p romdir, handle_rom_archive"
	cp "${builddir}/"* "${romdir}" || err "!cp romdir, handle_rom_archive"

	nukerom

	printf "Generating release/%s/roms/%s-%s_%s.tar.xz\n" \
	    "${version}" "${projectname}" "${version}" "${target##*/}"
	insert_version_files "${romdir}" || \
	    err "mkrom_tarball ${romdir}: versionfile"

	insert_copying_files "$romdir" || err "!insert copy, handle 2, $romdir"
	mkrom_tarball
}

nukerom()
{
	microcode_required="y"
	. "config/coreboot/${target}/target.cfg"
	if [ "${microcode_required}" != "y" ] && \
	    [ "${microcode_required}" != "n" ]; then microcode_required="y"; fi
	if [ "${microcode_required}" = "n" ]; then
		for romfile in "${romdir}"/*.rom; do
			[ -f "${romfile}" ] || continue
			strip_ucode "${romfile}"
		done
		for romfile in "${romdir}"/*.tmprom; do
			[ -f "${romfile}" ] || continue
			mv "${romfile}" "${romfile%.tmprom}.rom" || \
			    err "!mv romfile, nukerom"
		done
	fi

	# Hash the images before removing vendor files
	# which "./vendor inject" uses for verification
	rm -f "${romdir}/vendorhashes" || err "!rm ${romdir}/vendorhashes"
	touch "${romdir}/vendorhashes" || err "!touch ${romdir}/vendorhashes"
	(
	cd "${romdir}" || err "!cd romdir ${romdir}, nukerom"
	sha512sum ./*.rom >> vendorhashes || err "!create vendorhashes, nukerom"
	) || err "can't create vendor hashes"

	for romfile in "${romdir}"/*.rom; do
		[ -f "${romfile}" ] || continue
		./vendor inject -r "${romfile}" -b "${target}" -n nuke || \
		    err "!vendor inject (nuke) ${romfile}, nukerom"
	done
}

strip_ucode()
{
	romfile=${1}
	_newrom_b="${romfile%.rom}_nomicrocode.tmprom"
	cp "${romfile}" "${_newrom_b}" || err "!cp romfile ${romfile}, strip_u"
	microcode_present="y"
	"${cbfstool}" "${_newrom_b}" remove -n \
	    cpu_microcode_blob.bin 2>/dev/null || microcode_present="n"
	[ "${microcode_present}" = "n" ] || return 0
	printf "REMARK: '%s' already lacks microcode\n" "${romfile}" 1>&2
	printf "Renaming default ROM file instead.\n" 1>&2
	mv "${romfile}" "${_newrom_b}" || err "!mv romfile ${romfile}, strip_u"
}

insert_copying_files()
{
	remkdir "${1}/licenses"
	l="${1}/licenses"
	# copy licenses to rom image archive, for completion
	cp "src/grub/COPYING" "${l}/COPYING.grub" || return 1
	cp "src/coreboot/default/COPYING" "${l}/COPYING.coreboot" || return 1
	cp -R "src/coreboot/default/LICENSES" "${l}/LICENSES.coreboot" || return 1
	cp "src/seabios/default/COPYING" "${l}/COPYING.coreboot" || return 1
	cp "src/seabios/default/COPYING.LESSER" "${l}/COPYING.LESSER.seabios" || return 1
	cp -R "src/u-boot/default/Licenses" "${l}/COPYING.u-boot" || return 1
	printf "Multiple licenses. Check corresponding %s source archive\n" \
	    "${projectname}" > "${1}/COPYING" || return 1
}

mkrom_tarball()
{
	archivename="${relname}_${target##*/}"
	f="release/${version}/roms/${archivename}"
	mkdir -p "${f%/*}" || err "mkrom_tarball: !mkdir -p ${f%/*}"
	(
	cd "${romdir%"/bin/${target}"}" || err "!cd ${romdir%"/bin/${target}"}"
	mktarball "bin/${target}" "${archivename}.tar.xz"
	) || err "can't create rom tarball"
	mv "${romdir%"/bin/${target}"}/${archivename}.tar.xz"* "${f%/*}" || \
	    err "!mktarball, rom, ${f%/*}/${romdir%"/bin/${target}"}/${archivename}.tar.xz"

	printf "Created ROM archive: %s" "${f%/*}/${archivename}.tar.xz"
}

insert_version_files()
{
	printf "%s\n" "${version}" > "${1}/version" || return 1
	printf "%s\n" "${versiondate}" > "${1}/versiondate" || return 1
	printf "%s\n" "${projectname}" > "${1}/projectname" || return 1
}

mktarball()
{
	# preserve timestamps for reproducible tarballs
	tar_implementation=$(tar --version | head -n1) || :

	[ "${2%/*}" = "${2}" ] || mkdir -p "${2%/*}" || err "mk, !mkdir -p \"${2%/*}\""
	if [ "${tar_implementation% *}" = "tar (GNU tar)" ]; then
		tar --sort=name --owner=root:0 --group=root:0 \
		    --mtime="UTC 2023-11-06" -c "${1}" | xz -T0 -9e > "${2}" || \
		    err "mktarball 1, ${1}"
	else
		# TODO: reproducible tarballs on non-GNU systems
		tar -c "${1}" | xz -T0 -9e > "${2}" || err "mktarball 2, ${1}"
	fi
	(
	[ "${2%/*}" != "${2}" ] && x_ cd "${2%/*}"
	sha512sum "${2##*/}" > "${2##*/}.sha512" || \
	    err "!sha512sum \"${2##*/}\" > \"${2##*/}.sha512\""
	) || err "failed to create tarball checksum"
}

main $@