From df9964f6cdfcc4c85df14da0f4c4082eb11efdc5 Mon Sep 17 00:00:00 2001
From: Matthias Hochsteger <mhochsteger@cerbsim.com>
Date: Tue, 1 Jun 2021 16:44:59 +0200
Subject: [PATCH] Don't start GUI when building documentation

---
 python/gui.py | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/python/gui.py b/python/gui.py
index 7f317144..e753b28d 100644
--- a/python/gui.py
+++ b/python/gui.py
@@ -19,11 +19,9 @@ def StartGUI():
         pass
     
 if not netgen.libngpy._meshing._netgen_executable_started:
-    # catch exception for building html docu on server without display
-    try:  
+    import os
+    if not "NETGEN_DOCUMENTATION_RST_FORMAT" in os.environ:
         StartGUI()
-    except:
-        pass
 
 def Snapshot(w,h, filename=None):
     netgen.Redraw(blocking=True)