libmakepkg/lint_pkgbuild: fix regression in linting depends=(foo=$epoch:$pkgver-$pkgrel)

In commit 91b72cc386ca03241791748da5da2b150c724ace support was added for
linting depends/etc. to ensure they contain only valid dependency
specifiers. However it did not properly take into account the
possibility of dependencies linked to a specific pkgrel or epoch, which
promptly failed to build because "-" and ":" is not allowed in a pkgver.

pkgrel is something supported by pacman and useful for e.g. split packages
which cannot be mismatched even if the pkgver is the same. Fix by
removing an optional suffixed "-$decimal" when checking for a valid
pkgver.

epoch is kind of difficult to do without :D so likewise fix by removing
an optional prefixed "$integer:"

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

1 files changed, 11 insertions, 3 deletions

diff --git a/scripts/libmakepkg/lint_pkgbuild/provides.sh.in b/scripts/libmakepkg/lint_pkgbuild/provides.sh.in
index 7500a88a..102be08e 100644
--- a/scripts/libmakepkg/lint_pkgbuild/provides.sh.in
+++ b/scripts/libmakepkg/lint_pkgbuild/provides.sh.in
@@ -37,19 +37,27 @@ lint_provides() {
 
 	get_pkgbuild_all_split_attributes provides provides_list
 
+	# this function requires extglob - save current status to restore later
+	local shellopts=$(shopt -p extglob)
+	shopt -s extglob
+
 	for provide in "${provides_list[@]}"; do
 		if [[ $provide == *['<>']* ]]; then
 			error "$(gettext "%s array cannot contain comparison (< or >) operators.")" "provides"
 			ret=1
 			continue
 		fi
-		name=${provide%%=*}
-		ver=${provide#*=}
+		name=${provide%=*}
+		# remove optional epoch in version specifier
+		ver=${provide##$name=?(+([0-9]):)}
 		lint_one_pkgname provides "$name" || ret=1
 		if [[ $ver != $provide ]]; then
-			check_pkgver "$ver" provides || ret=1
+			# remove optional pkgrel in version specifier
+			check_pkgver "${ver%-+([0-9])?(.+([0-9]))}" provides || ret=1
 		fi
 	done
 
+	eval "$shellopts"
+
 	return $ret
 }