lbmk/script/update/project/trees

#!/usr/bin/env sh
# SPDX-License-Identifier: GPL-3.0-or-later
# SPDX-FileCopyrightText: 2014-2016,2020,2021,2023 Leah Rowe <leah@libreboot.org>
# SPDX-FileCopyrightText: 2022 Alper Nebi Yasak <alpernebiyasak@gmail.com>
# SPDX-FileCopyrightText: 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>

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

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

eval "$(setvars "" _target tree rev project cfgsdir _xm)"

main()
{
	printf "Downloading %s and applying patches\n" ${project}

	[ -z "${1}" ] && err "project name not specified"
	project="${1}"
	cfgsdir="config/${project}"
	[ -d "${cfgsdir}" ] || err "unsupported project name"
	shift 1

	targets=$(listitems "${cfgsdir}")
	[ $# -gt 0 ] && targets=$@
	[ -z "${targets}" ] && err "No targets for project: ${project}"

	for x in ${targets}; do
		x_ rm -f "${cfgsdir}/"*/seen
		x_ download_for_target "${x}"
	done
}

download_for_target()
{
	_target="${1}"
	tree="undefined"
	rev="undefined"

	x_ fetch_config "${_target}"

	if [ -d "${project}/${tree}" ]; then
		printf "REMARK: download/%s %s (%s): exists. Skipping.\n" \
		    "${project}" "${tree}" "${_target}" 1>&2
	else
		x_ fetch_from_upstream "${project}"
		x_ prepare_new_tree "${_target}" "${tree}" "${rev}"
	fi
}

fetch_config()
{
	_target=${1}

	while true; do
		eval "$(setvars "" rev tree)"
		_xm="fetch_config ${project}/${_target}"

		check_config_for_target "${_target}"

		# This is to override $rev and $tree
		. "${cfgsdir}/${_target}/target.cfg" || \
		    err "fetch_config: no \"${cfgsdir}/${_target}/target.cfg\""

		if [ "${_target}" != "${tree}" ]; then
			_target="${tree}"
			continue
		fi
		[ -z ${tree} ] && err "${_xm}: tree undefined"
		[ -z ${rev} ] && err "${_xm}: revision undefined"
		break
	done
}

check_config_for_target()
{
	[ -f "${cfgsdir}/${1}/target.cfg" ] || \
		err "${_xm} check: target.cfg does not exist"

	[ -f "${cfgsdir}/${1}/seen" ] && \
		err "${_xm} check: infinite loop in tree definitions"

	x_ touch "${cfgsdir}/${1}/seen"
}

fetch_from_upstream()
{
	[ -d "${1}" ] || mkdir -p "${1}" || return 1
	[ -d "${1}" ] || return 1
	[ -d "${1}/${1}" ] && return 0

	./update project repo ${1} || return 1
}

prepare_new_tree()
{
	target=${1}
	tree=${2}
	rev=${3}

	printf "Preparing %s tree %s (%s)\n" "${project}" "${tree}" "${target}"

	x_ cp -R "${project}/${project}" "${project}/${tree}"
	x_ git_reset_rev "${project}/${tree}" "${rev}" "err"
	(
	x_ cd "${project}/${tree}"
	git submodule update --init --checkout || \
	    err "prepare_new_tree ${project}/${tree}: can't update git modules"
	)
	x_ git_am_patches "${PWD}/${project}/${tree}" \
	    "${PWD}/${cfgsdir}/${tree}/patches" "err"
}

main $@