merge coreboot/u-boot download logic to one script

they are fundamentally the same, in an lbmk context.

they are downloaded in the same way, and compiled in
the same way!

(Kconfig infrastructure, board-specific code, the way
submodules are used in git, etc)

~200 sloc reduction in resources/scripts

the audit begins

Signed-off-by: Leah Rowe <leah@libreboot.org>

1 files changed, 191 insertions, 0 deletions

diff --git a/fetch_trees b/fetch_trees
new file mode 100755
index 00000000..37ff0928
--- /dev/null
+++ b/fetch_trees
@@ -0,0 +1,191 @@
+#!/usr/bin/env sh
+
+#  helper script: create code trees based on git revision, with patches
+#  (currently used for downloading coreboot and u-boot)
+#
+#	Copyright (C) 2014-2016,2020,2021,2023 Leah Rowe <info@minifree.org>
+#	Copyright (C) 2022 Alper Nebi Yasak <alpernebiyasak@gmail.com>
+#	Copyright (C) 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
+#
+#	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/>.
+#
+
+[ "x${DEBUG+set}" = 'xset' ] && set -v
+set -u -e
+
+_target=""
+tree=""
+rev=""
+project=""
+cfgsdir=""
+
+main()
+{
+	rm -f ${cfgsdir}/*/seen
+
+	printf "Downloading %s and (if available) applying patches\n" \
+	    ${project}
+
+	[ -z "${1}" ] && err "project name not specified"
+	project="${1}"
+	cfgsdir="resources/${project}"
+	[ -d "${cfgsdir}" ] || err "unsupported project name"
+	shift 1
+
+	targets=""
+	if [ $# -gt 0 ]; then
+		targets=$@
+	else
+		for x in "${cfgsdir}/"*; do
+			[ ! -d "${x}" ] && continue
+			targets="${targets} ${x##*/}"
+		done
+	fi
+	for x in ${targets}; do
+		rm -f "${cfgsdir}"/*/seen
+		download_for_target "${x}"
+	done
+
+	rm -f ${cfgsdir}/*/seen
+}
+
+download_for_target()
+{
+	_target="${1}"
+	tree="undefined"
+	rev="undefined"
+
+	fetch_config "${_target}" || exit 1
+
+	rm -f "${cfgsdir}"/*/seen
+
+	if [ -d "${project}/${tree}" ]; then
+		printf "REMARK: download/%s %s: exists. Skipping.\n" \
+				${project} ${tree}
+		[ "${tree}" != "${1}" ] && \
+			printf "(for target: '%s}')\n" ${1}
+		return 0
+	fi
+
+	gitclone_from_upstream || exit 1
+
+	prepare_new_tree "${1}" "${tree}" "${rev}" \
+			|| exit 1
+}
+
+fetch_config()
+{
+	_target=${1}
+
+	while true; do
+		rev="undefined"
+		tree="undefined"
+
+		check_config_for_target "${_target}" || return 1
+
+		# This is to override $rev and $tree
+		. "${cfgsdir}/${_target}/target.cfg" || exit 1
+
+		if [ "${_target}" != "${tree}" ]; then
+			_target="${tree}"
+			continue
+		elif [ "${tree}" = "undefined" ]; then
+			printf "ERROR: download/%s:"
+			printf " tree name undefined for '%s\n'" \
+					${project} ${_target}
+			return 1
+		elif [ "${rev}" = "undefined" ]; then
+			printf "ERROR: download/%s:"
+			printf " commit ID undefined for '%s'\n" \
+					${project} ${_target}
+			return 1
+		else
+			break
+		fi
+	done
+}
+
+check_config_for_target()
+{
+	_target=${1}
+
+	if [ ! -f "${cfgsdir}/${_target}/target.cfg" ]; then
+		printf "ERROR: download/%s: target.cfg does not" ${project}
+		printf " exist for '%s'\n" ${_target}
+		return 1
+	elif [ -f "${cfgsdir}/${_target}/seen" ]; then
+		printf "ERROR: download/%s: logical loop:" ${project}
+		printf " '%s' target.cfg refers to another tree," ${_target}
+		printf " which ultimately refers back to '%s'." ${_target}
+		return 1
+	fi
+	touch "${cfgsdir}/${_target}/seen"
+}
+
+gitclone_from_upstream()
+{
+	[ ! -d "${project}" ] && \
+		mkdir -p "${project}"
+	[ ! -d "${project}" ] && \
+		return 1
+	[ -d "${project}/${project}" ] && \
+		return 0
+	./gitclone ${project} || \
+		return 1
+}
+
+prepare_new_tree()
+{
+	target=${1}
+	tree=${2}
+	rev=${3}
+
+	printf "Preparing %s tree: %s\n" ${project} ${tree}
+	[ "${tree}" != "${target}" ] && \
+		printf "(for target, %s)\n" "${target}"
+
+	cp -R "${project}/${project}" "${project}/${tree}" || exit 1
+	(
+	cd "${project}/${tree}" \
+		|| err "cannot cd to ${project}/${tree}"
+	git reset --hard ${rev} \
+		|| err "cannot reset ${project} revision for tree, ${tree}"
+	git submodule update --init --checkout \
+		|| err "cannot update ${project} submodules for tree, ${tree}"
+
+	for patch in ../../"${cfgsdir}"/"${tree}"/patches/*.patch; do
+		[ ! -f "${patch}" ] && \
+			continue
+		if ! git am "${patch}"; then
+			git am --abort
+			err "cannot patch ${tree}"
+		fi
+	done
+
+	# extra.sh can be used for anything
+	# but should *only* be a last resort
+	if [ -f "../../${cfgsdir}/${tree}/extra.sh" ]; then
+		"../../${cfgsdir}/${tree}/extra.sh" || \
+			err "${tree} extra.sh"
+	fi
+	)
+}
+
+err()
+{
+	printf "ERROR, %s, %s\n" $0 $1 1>&2
+	exit 1
+}
+
+main $@