preexec to sync DISPLAY env

preexec-display

function preexec {                                                                                    
  if [ -n "$TMUX" ]; then                                                                               
    export DISPLAY=$(tmux show-environment | grep -oP "(?<=SSH_CLIENT=)[\d\.]*"):0.0
  else
    export DISPLAY=$(env | grep -oP "(?<=SSH_CLIENT=)[\d\.]*"):0.0

  fi
}