pre_upgrade() {
  ln -s mantis_offline.php.sample /usr/share/webapps/mantisbt/mantis_offline.php
}

post_upgrade() {
  local new_package_version="${1}"
  local old_package_version="${2}"

  if [ "$(vercmp "${old_package_version}" "2.22.1")" -le 0 ]; then
    echo 'The webapp now needs to be run as its own user/group: mantisbt/mantisbt.'
  fi

  if [ "$(vercmp "${new_package_version}" "2.5.2")" -ge 0 ]; then
    echo 'Follow the upgrade steps:'
    echo 'https://mantisbt.org/docs/master/en-US/Admin_Guide/html-desktop/#admin.install.upgrade'
    echo 'Afterwards, remove /usr/share/webapps/mantisbt/mantis_offline.php'
  fi
}

post_install() {
  echo 'Make sure your HTTP server/PHP is part of the "mantisbt" group'
}