From 7918fe868002c6fd55eb5367f7bd5c5bf7ec3731 Mon Sep 17 00:00:00 2001
From: Achim Gsell <achim.gsell@psi.ch>
Date: Thu, 27 Dec 2018 17:57:24 +0100
Subject: [PATCH] bugfix in libpbuild.bash

bug fixed in function pbuild::module_is_avail(): set 'uvar' to '__unused__'
if second argument is empty/unset
---
 Pmodules/libpbuild.bash | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Pmodules/libpbuild.bash b/Pmodules/libpbuild.bash
index 1c85bbc..7b1eef7 100644
--- a/Pmodules/libpbuild.bash
+++ b/Pmodules/libpbuild.bash
@@ -157,7 +157,7 @@ pbuild::install_docfiles() {
 pbuild::module_is_avail() {
 	local "$2"
 	local uvar="$2"
-	[[ -z "${uvar}" ]] || uvar="__unused__"
+	[[ -n "${uvar}" ]] || uvar="__unused__"
 	local output=( $("${MODULECMD}" bash avail -a -m "$1" 2>&1 1>/dev/null) )
 	[[ "${output[0]}" == "$1" ]] && std::upvar "${uvar}" "${output[1]}"
 }