.bash_profile function to keep touchbar sudo setup (especially after an OS upgrade has undone it)

enable_touchbar_sudo.sh

(psudo=/etc/pam.d/sudo;
  if test -e "$psudo" \
    && ! grep --silent pam_tid.so "$psudo" \
    && test -t 0; then
      false
  fi) || function sudo() {
  set -e
  sudo_=$(which sudo)
  if ! test -t 0; then
    # no tty, just pass the sudo call through
    $sudo_ "$@"
  else
    echo "Enabling touchbar authentication for sudo"
    psudo=/etc/pam.d/sudo
    $sudo_ --validate
    (set -x
      $sudo_ chmod 0644 "$psudo"
      $sudo_ sed -i '' '2i\
auth       sufficient     pam_tid.so
' "$psudo"
      $sudo_ chmod 0444 "$psudo")
    unset -f sudo
    echo "Touchbar sudo is setup, calling sudo for your original purpose..."
    sudo "$@" || true
  fi
}