makepkg: use last match in BUILDENV/OPTIONS array

Using the last match in the BUILDENV and OPTIONS arrays allows the
user to easily override these values without specifying the entire
array. For example add "BUILDENV+=(sign)" in ~/.makepkg.conf.

Fixes FS#26701.

Signed-off-by: Allan McRae <allan@archlinux.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/scripts/makepkg.sh.in b/scripts/makepkg.sh.in
index d387b7d7..fce75588 100644
--- a/scripts/makepkg.sh.in
+++ b/scripts/makepkg.sh.in
@@ -830,8 +830,9 @@ check_buildenv() {
 in_opt_array() {
 	local needle=$1; shift
 
-	local opt
-	for opt in "$@"; do
+	local i opt
+	for (( i = $#; i > 0; i-- )); do
+		opt=${!i}
 		if [[ $opt = "$needle" ]]; then
 			# enabled
 			return 0