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#!/usr/bin/env sh

#
#  helper script: generate release archive (ROM images)
#
#	Copyright (C) 2020,2021,2022,2023 Leah Rowe <info@minifree.org>
#
#	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/>.
#

# This script assumes that the working directory is the root
# of git or release archive

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

projectname="$(cat projectname)"
version="version-unknown"
versiondate="version-date-unknown"
target=""
CONFIG_HAVE_MRC=""
CONFIG_HAVE_ME_BIN=""
CONFIG_KBC1126_FIRMWARE=""
ifdtooldir="coreboot/default/util/ifdtool"
ifdtool="${ifdtooldir}/ifdtool"
cbfstooldir="coreboot/default/util/cbfstool"
cbfstool="${cbfstooldir}/cbfstool"

main()
{
	printf "Building ROM image archives for version %s\n" "${version}"

	init_check

	for romdir in bin/*; do
		make_archive
	done

	printf "\nROM archives available at release/%s/roms/\n\n" "${version}"
}

init_check()
{
	[ -f version ] && \
		version="$(cat version)"
	[ -f versiondate ] && \
		versiondate="$(cat versiondate)"
	[ ! -d "bin/" ] && \
		err "no ROMs built yet. exiting"
	[ ! -d "release/" ] && \
		mkdir -p release/
	[ ! -d "release/${version}/" ] && \
		mkdir -p "release/${version}/"
	[ -d "release/${version}/roms/" ] && \
		rm -Rf "release/${version}/roms/"
	[ ! -d "release/${version}/roms/" ] && \
		mkdir -p "release/${version}/roms/"
}

make_archive()
{
	target="${romdir##*/}"

	echo ${target}
	if [ ! -d "${romdir}/" ]; then
		continue
	fi

	CONFIG_HAVE_MRC="y"
	CONFIG_HAVE_ME_BIN="y"
	CONFIG_KBC1126_FIRMWARE="y"
	grep "CONFIG_HAVE_ME_BIN=y" \
			"resources/coreboot/${target}/config/"* \
			|| CONFIG_HAVE_ME_BIN="n"
	grep "CONFIG_HAVE_MRC=y" \
			"resources/coreboot/${target}/config/"* \
			|| CONFIG_HAVE_MRC="n"
	grep "CONFIG_KBC1126_FIRMWARE=y" \
			"resources/coreboot/${target}/config"/* \
			|| CONFIG_KBC1126_FIRMWARE="n"

	# remove ME/MRC/EC firmware from ROM images
	if [ "${CONFIG_HAVE_ME_BIN}" = "y" ] \
			|| [ "${target}" = "e6400nvidia_4mb" ]; then
		purge_blobs
	fi

	printf "Generating release/%s/roms/%s-%s_%s.tar.xz\n" \
			"${version}" "${projectname}" \
			"${version}" "${target##*/}"
	printf "%s\n" "${version}" > "${romdir}/version"
	printf "%s\n" "${versiondate}" > "${romdir}/versiondate"
	printf "%s\n" "${projectname}" > "${romdir}/projectname"

	f="release/${version}/roms/${projectname}-${version}_${target##*/}"
	tar -c "${romdir}/" | xz -9e > "${f}.tar.xz"

	if [ -d "${romdir}_tmp" ]
	then
		rm -Rf "${romdir}"
		mv "${romdir}_tmp" "${romdir}"
	fi
}

purge_blobs()
{
	if [ ! -d coreboot/default ]; then
		./download coreboot default || exit 1
	fi
	if [ ! -f "${ifdtool}" ] || [ ! -f "${cbfstool}" ]; then
		./build module cbutils default || exit 1
	fi

	rm -Rf "${romdir}_tmp" # dirty hack, to reduce disk io later
	# rather than using /tmp, which might not be tmpfs
	mkdir "${romdir}_tmp"

	# Hash the rom before removing blobs
	if [ ! -f "${romdir}/blobhashes" ]; then
		printf "ROMs must match these hashes after blob insertion:" \
			> "${romdir}/blobhashes"
	fi
	(
	cd ${romdir} || err "subshell: cd"
	sha1sum *.rom >> blobhashes || err "subshell: sha1sum"
	)

	for romfile in "${romdir}"/*.rom
	do
		if [ ! -f "${romfile}" ]; then
			continue
		fi

		if [ "${CONFIG_HAVE_ME_BIN}" = "y" ]; then
			${ifdtool} --nuke me "${romfile}" || exit 1
			mv "${romfile}" "${romdir}_tmp"/
			mv "${romfile}.new" "${romfile}"
		fi

		if [ "${CONFIG_HAVE_MRC}" = "y" ]
		then
			${cbfstool} "${romfile}" remove -n mrc.bin || exit 1
			${cbfstool} "${romfile}" print
		fi

		if [ "${CONFIG_KBC1126_FIRMWARE}" = "y" ]; then
			${cbfstool} "${romfile}" remove -n ecfw1.bin || exit 1
			${cbfstool} "${romfile}" remove -n ecfw2.bin || exit 1
		fi

		# TODO: replace this board-specific hack
		if [ "${target}" = "e6400nvidia_4mb" ]; then
			${cbfstool} "${romfile}" remove \
				-n "pci10de,06eb.rom" \
				|| exit 1
		fi
	done
}

err()
{
	printf "%s: %s\n" $0 $1
	exit 1
}

main $@