fix: do not set extglob globally to avoid side-effects

Instead only enable it for whatever operation requires them.

Example sides effects:
commitpkg can accidently execute PKGBUILD functions when sourcing the
PKGBUILD that has function names like package_libsigc++()

Fixes #87

1 files changed, 0 insertions, 2 deletions

diff --git a/src/diffpkg.in b/src/diffpkg.in
index 43af217..10b0904 100644
--- a/src/diffpkg.in
+++ b/src/diffpkg.in
@@ -2,8 +2,6 @@
 #
 # SPDX-License-Identifier: GPL-3.0-or-later
 
-shopt -s extglob
-
 m4_include(lib/common.sh)
 
 usage() {