tmux: extend session name on statusbar to 20 chars

home/features/cli/fish.nix

@@ -40,6 +40,12 @@ in
     };
 
     interactiveShellInit =
+      # Launch tmux
+      ''
+        if not set -q TMUX
+          tmux attach-session -t $(hostname -s) || tmux new-session -s $(hostname -s)
+        end
+      '' +
       # Open command buffer in vim when alt+e is pressed
       ''
         bind \ee edit_command_buffer

home/features/cli/tmux.nix

@@ -34,6 +34,9 @@
       bind -n M-j previous-window   # alt+j
       bind -n M-k next-window       # alt+k
 
+      # display up to 20 chars of session name
+      set-option -g status-left-length 20
+
       # default statusbar colors
       set-option -g status-style fg=yellow,bg=black