Test if already inside a tmux

splitWORKSTATION

@@ -16,9 +16,14 @@
 if-shell -b 'tmux has-session -t jd' {
 	display-message "Attach to **jd** existing session"
 	## Attach to the first pane of the first window
+	## Only works from a running tmux
 	attach-session -t jd:1.1
 }
 # }}}
+
+# If file was source from a running tmux
+# This allow to run tmux source-file command outside of Tmux…
+if-shell -b 'test -n $TMUX' {
 	# If no session already exists
 	if-shell '! tmux has-session -t jd' {
 		display-message "Create a new session for Workstation"
@@ -54,3 +59,4 @@ if-shell -b 'tmux has-session -t 0' {
 		kill-session -t 0
 	}
 	# }}}
+}