Script to toggle a graphical window with my main textual terminal windows (managed by tmux)

myterminal.sh

#!/bin/bash
# Copyright (C) 2020 by Mattia Monga - Distribute freely under GPLv3
# This script is triggered by a shortcut key (I use F12)
# It toggles a graphical window with my main textual terminal windows (managed by tmux)
# If you switch to a textual console you can still peek at them with
# tmux attach-session -t $MYSESSION

# Just in case you want to debug
# exec 3>/tmp/myterminal-$$.log
# BASH_XTRACEFD=3
# set -x

MYSESSION=myterm
# or any other graphical terminal, e.g. gnome-terminal
TERMCMD=kitty
# if you use gnome-terminal, here you need gnome-terminal-server
TERMSESSION=kitty
PID=$(pidof $TERMSESSION)
if [ -n "$PID" ]; then
    if tmux has-session -t $MYSESSION ; then
        tmux detach-client -s $MYSESSION
        kill -9 $PID
    fi
else
    if tmux has-session -t $MYSESSION ; then
        exec $TERMCMD tmux attach-session -t $MYSESSION
    else
        exec $TERMCMD tmux new-session -A -D -s $MYSESSION
    fi
fi