repo-add.sh.in: avoid being clever with repo repacking

Revert to the old behavior that 6f5a90 attempted to simplify and go with
the original proposed solution of using "ugly" bash to detect empty
directories.

Signed-off-by: Dave Reisner <dreisner@archlinux.org>
Signed-off-by: Dan McGee <dan@archlinux.org>

scripts/repo-add.sh.in

@@ -630,8 +630,13 @@ if (( success )); then
 	filename=${REPO_DB_FILE##*/}
 
 	pushd "$tmpdir/tree" >/dev/null
-	# strip the './' off filenames; this also allows us to tar an empty dir
-	bsdtar -s '%^./\?%%' -c${TAR_OPT}f "$tmpdir/$filename" ./
+	if ( shopt -s nullglob; files=(*); (( ${#files[*]} )) ); then
+		bsdtar -c${TAR_OPT}f "$tmpdir/$filename" *
+	else
+		# we have no packages remaining? zip up some emptyness
+		warning "$(gettext "No packages remain, creating empty database.")"
+		bsdtar -c${TAR_OPT}f "$tmpdir/$filename" -T /dev/null
+	fi
 	popd >/dev/null
 
 	create_signature "$tmpdir/$filename"