Set tmux pane title to short hostname on ssh connections for Fish

set-tmux-title

# Copy that into your ~/.config/fish/config.fish

function ssh
  set ps_res (ps -p (ps -p %self -o ppid= | xargs) -o comm=)
  if [ "$ps_res" = "tmux" ]
    tmux rename-window (echo $argv | cut -d . -f 1)
    command ssh "$argv"
    tmux set-window-option automatic-rename "on" 1>/dev/null
  else
    command ssh "$argv"
  end
end

@nippyin This code is not dependent on the terminal; it's for tmux (which you run inside the terminal), using the fish shell. If you're using tmux and fish inside kitty, you can use the code above.

If you don't use tmux, you can use kitty @ set-window-title and kitty @ set-tab-title to configure the kitty window. You'll have to add allow_remote_control to your kitty.conf file first.

If you use tmux but bash or other shell, adapt the function to your shell, or look online (people have made a number of versions).

Thanks it works.

I added some of the recs from the comments and also made this support ssh arguments such as -X or -L.

function ssh
  ### automatically renames tmux pane with hostname when using SSH
  
  # check if tmux is running
  if test -n "$TMUX"
    # assume first arg not starting with '-' is hostname
    set hname -- $argv
    for a in (string split -- ' ' $argv)
      if not string match -- '-*' $a
        set hname -- $a
        break
      end
    end
    tmux rename-window $hname
    echo -- $argv
    command ssh $argv
    tmux set -w automatic-rename "on"
  # if not running tmux, just use ssh
  else
    command ssh $argv
  end
end

Note that this version assumes that the first arg not starting with a dash is the hostname, so if will be wrong if you do something like ssh -L 5901:192.168.1.42:5901 hostname. Instead, you have to do ssh hostname -L 5901.192.168.1.42:5901

@darren-muon awesome, thank you so much!