post_install() {
  # display some info
  echo "For command line options see '/usr/share/doc/giana/options.txt'."
}

post_upgrade() {
  post_install
}

post_remove() {
  echo "You may safely delete the '~/.giana' directory containing the config/highscore"
  echo "files, if you do not want to preserve them."

  # leftover files from old behaviour
  if [ -d opt/giana ]; then
    echo "You may also safely delete /opt/giana and it's contents."
  fi
}