From cb72c408280eea6af7c7abb8ee96b0f05e2225cf Mon Sep 17 00:00:00 2001
From: Alex Povel <alex.povel@tuhh.de>
Date: Fri, 30 Oct 2020 15:21:18 +0100
Subject: [PATCH] Check if env var is empty (if it does exists but unset)

Idea from https://github.com/lsangild/ITAMS/blob/d23841b09ff5eab38dd533aa2428ca9f25557d24/Report/texsetup/lua/utility.lua
---
 lib/lua/envvar_newcommands.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/lua/envvar_newcommands.lua b/lib/lua/envvar_newcommands.lua
index 24b2c10..564f737 100644
--- a/lib/lua/envvar_newcommands.lua
+++ b/lib/lua/envvar_newcommands.lua
@@ -30,7 +30,7 @@ local macros_to_envvars = {
 
 for macro_name, env_var in pairs(macros_to_envvars) do
     local content = os.getenv(env_var)
-    if content == nil then
+    if content == nil or content == "" then
         content = missing
     end
     --[[