handle project downloads in main lbmk script

this means the unified /tmp handling is now provided for
in both the former "fetch" and "fetch_trees" script, which
are now (respectively):

./update project repo
./update project trees

if the fetch scripts weren't cleaning /tmp before, they
now are, because lbmk handles it

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

1 files changed, 124 insertions, 0 deletions

diff --git a/script/update/project/repo b/script/update/project/repo
new file mode 100755
index 00000000..270d6cb9
--- /dev/null
+++ b/script/update/project/repo
@@ -0,0 +1,124 @@
+#!/usr/bin/env sh
+
+# SPDX-FileCopyrightText: 2022 Caleb La Grange <thonkpeasant@protonmail.com>
+# SPDX-FileCopyrightText: 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
+# SPDX-FileCopyrightText: 2023 Leah Rowe <leah@libreboot.org>
+# SPDX-License-Identifier: GPL-3.0-only
+
+. "include/err.sh"
+
+name=""
+revision=""
+location=""
+url=""
+bkup_url=""
+tmp_dir=""
+depend=""
+
+main()
+{
+	id -u 1>/dev/null 2>/dev/null || \
+	    fail "cannot ascertain user id"
+	if [ "$(id -u)" = "0" ]; then
+		fail "running lbmk as root is not permitted"
+	fi
+	./checkgit || err "Please read: https://libreboot.org/docs/build/"
+
+	[ $# -gt 0 ] || fail "no argument given"
+
+	[ -z "${1+x}" ] && fail 'main(): name not set'
+	name=${1}
+
+	read_config
+	verify_config
+
+	clone_project
+	[ "${depend}" = "" ] || ./fetch ${depend} || \
+	    fail "Cannot fetch dependency, ${depend}, for project, ${name}"
+
+	rm -Rf "${tmp_dir}" || fail "cannot remove tmpdir, ${tmp_dir}"
+}
+
+read_config()
+{
+	awkstr=" /\{.*${name}.*}{/ {flag=1;next} /\}/{flag=0} flag { print }"
+	while read -r line ; do
+		set ${line} || fail "read_config: set line"
+		case ${line} in
+		rev:*)
+			revision=${2} ;;
+		loc:*)
+			location=${2} ;;
+		url:*)
+			url=${2} ;;
+		bkup_url:*)
+			bkup_url=${2} ;;
+		depend:*)
+			depend=${2} ;;
+		esac
+	done << EOF
+	$(eval "awk '${awkstr}' resources/git/revisions")
+EOF
+}
+
+verify_config()
+{
+	[ -z "${revision+x}" ] && fail 'verify_config: revision not set'
+	[ -z "${location+x}" ] && fail 'verify_config: location not set'
+	[ -z "${url+x}" ] && fail 'verify_config: url not set'
+}
+
+clone_project()
+{
+	tmp_dir=$(mktemp -dt "${name}_XXXXX")
+
+	git clone ${url} "${tmp_dir}" || git clone ${bkup_url} "${tmp_dir}" || \
+	    fail "clone_project: could not download ${name}"
+	(
+	cd "${tmp_dir}" || fail "clone_project: tmpdir not created"
+	git reset --hard ${revision} || \
+	    fail "clone_project: Cannot reset revision"
+	)
+	patch_project
+
+	[ ! -d "${location}" ] || \
+		rm -Rf "${location}" || \
+		    fail "clone_project: Can't remove directory '${location}'"
+	mv "${tmp_dir}" "${location}" || \
+	    fail "clone_project: could not copy temp file to destination"
+}
+
+patch_project()
+{
+	patchdir="resources/${name}/patches"
+
+	for patchfile in "${PWD}/${patchdir}"/*.patch ; do
+		[ -f "${patchfile}" ] || continue
+		(
+		cd "${tmp_dir}" || fail "patch_project: tmpdir unavailable"
+		git am "${patchfile}" || \
+		    fail "patch_project: Cannot patch project: $name"
+		)
+	done
+}
+
+fail()
+{
+	for x in "${location}" "${tmp_dir}"; do
+		[ -z "${x}" ] || [ ! -d "${x}" ] || rm -Rf "${location}" || :
+	done
+	usage
+	err "${1}"
+}
+
+usage()
+{
+	cat <<- EOF
+	Usage: ./fetch [name]
+
+	Options:
+	name: Module name as specified in resources/git/revisions
+	EOF
+}
+
+main $@