From 47f821e80a81b12d09cd9cd22e8f6f5750a1c2f2 Mon Sep 17 00:00:00 2001
From: "Kenneth Benzie (Benie)" <benie@infektor.net>
Date: Thu, 22 Aug 2019 21:31:56 +0100
Subject: [PATCH] Don't unset tmux option when not in tmux

---
 prompt_fresh_setup | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/prompt_fresh_setup b/prompt_fresh_setup
index 7e03286..04c9b47 100644
--- a/prompt_fresh_setup
+++ b/prompt_fresh_setup
@@ -110,7 +110,9 @@ fresh_line_one() {
   fi
 
   # Unset vim/tmux navigate flag to handle C-z and multiple vim jobs.
-  tmux set-window-option -u @vim$TMUX_PANE
+  if [[ ! -z "$TMUX" ]]; then
+    tmux set-window-option -u @vim$TMUX_PANE
+  fi
 
   # If a virtualenv is enabled, display it's basename
   if [[ ! -z "$VIRTUAL_ENV" ]]; then