fix: enable extglob before func definition for bash-5.2 compatibility

The `extglob` option changes the behavior of the shell parser, since
extended glob patterns would otherwise be syntax errors. bash-5.2
changed the way a function definition is processed by calling the parser
instead of relying on the ad-hoc code in bash-5.1 and earlier versions.
This means, in bash-5.2 the shell function was parsed without `extglob`
being enabled because the `shopt` command to enable it was part of the
function body.

Add `shopt` options for `extglob` around function definitions to address
this issue and allow bash-5.2 to correctly parse the function.

Co-authored-by: Frédéric Pierret (fepitre) <frederic.pierret@qubes-os.org>
Co-authored-by: Levente Polyak <anthraxx@archlinux.org>
Signed-off-by: Levente Polyak <anthraxx@archlinux.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/diffpkg.in b/src/diffpkg.in
index 10b0904..6d07419 100644
--- a/src/diffpkg.in
+++ b/src/diffpkg.in
@@ -248,6 +248,7 @@ diff_pkgs() {
 	fi
 }
 
+shopt -s extglob
 fetch_pkg() {
 	local pkg pkgdest pkgurl
 	case $1 in
@@ -295,6 +296,7 @@ fetch_pkg() {
 
 	echo "$pkgdest"
 }
+shopt -u extglob
 
 if (( $# < 2 )); then
 	if [[ ! -f PKGBUILD ]]; then