[pacman-contrib] [PATCH 1/2] updpkgsums: rely on makepkg's exported schema declaration for algo types

[Eli Schwartz]

Rather than heuristically match (md|sha)[[:digit:]]+sums or even .*sums,
read makepkg's internal description of known hash algorithms, and use it
to generate a search pattern. This ensures that we will always be in
sync with the makepkg installed on the user's system.

Fixes support for the newly added b2sums algorithm.

Signed-off-by: Eli Schwartz <eschwartz at archlinux.org>
---

This depends on pacman from git master, because schema.sh does not exist
in pacman 5.1.x

 src/updpkgsums.sh.in | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/updpkgsums.sh.in b/src/updpkgsums.sh.in
index 9c545ea..618f471 100644
--- a/src/updpkgsums.sh.in
+++ b/src/updpkgsums.sh.in
@@ -22,6 +22,11 @@ shopt -s extglob
 declare -r myname='updpkgsums'
 declare -r myver='@PACKAGE_VERSION@'
 
+LIBRARY=${LIBRARY:-'@datarootdir@/makepkg'}
+
+# Import libmakepkg
+source "$LIBRARY"/util/schema.sh
+
 usage() {
 	printf "%s v%s\n" "${myname}" "${myver}"
 	echo
@@ -92,9 +97,10 @@ export BUILDDIR=$(mktemp -d  "${TMPDIR:-/tmp}/updpkgsums.XXXXXX")
 newbuildfile=$(mktemp "${TMPDIR:-/tmp}/updpkgsums.XXXXXX")
 
 trap "rm -rf '$BUILDDIR' '$newbuildfile'" EXIT
+sumtypes=$(IFS='|'; echo "${known_hash_algos[*]}")
 newsums=$(makepkg -g -p "$buildfile" "${MAKEPKG_OPTS[@]}") || die 'Failed to generate new checksums'
-awk -v newsums="$newsums" '
-	/^[[:blank:]]*(md|sha)[[:digit:]]+sums(_[^=]+)?=/,/\)[[:blank:]]*(#.*)?$/ {
+awk -v sumtypes="$sumtypes" -v newsums="$newsums" '
+	$0 ~"^[[:blank:]]*(" sumtypes ")sums(_[^=]+)?=", $0 ~ "\)[[:blank:]]*(#.*)?$" {
 		if (!w) {
 			print newsums
 			w++
-- 
2.21.0