[PATCH 03/23] tuna: Don't start the gui if a display is not available

[John Kacur <jkacur@redhat.com>]

This is intended for the main branch of tuna.

Don't start the gui if a display is not available.

Signed-off-by: John Kacur <jkacur@redhat.com>
---
 tuna-cmd.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tuna-cmd.py b/tuna-cmd.py
index e953869c4f48..f37e286bffdb 100755
--- a/tuna-cmd.py
+++ b/tuna-cmd.py
@@ -736,6 +736,12 @@ def main():
             thread_help(tid)
 
     elif args.command in ['g', 'gui']:
+        # Don't try to start the gui if no display is available
+        display = os.getenv("DISPLAY")
+        if not display:
+            parser.print_help()
+            return
+
         try:
             from tuna import tuna_gui
         except ImportError:
-- 
2.51.1