post_install() {
  echo ''
  echo 'concrete5 was installed to /usr/share/webapps/concrete5'
  echo 'Please make sure that the mysqli extension is enabled in /etc/php/php.ini.'
  echo ''
}

pre_remove() {
  if [ -d "/usr/share/webapps/concrete5_backup" ]; then 
    echo ''
    echo 'There is already a concrete5 backup directory in place.'
    echo 'It will be replaced in favor of the concrete5 installation which is currently'
    echo '  being uninstalled.'
    rm -rf /usr/share/webapps/concrete5_backup
  fi

  mv /usr/share/webapps/concrete5 /usr/share/webapps/concrete5_backup
  echo ''
  echo 'Your concrete5 installation was backed up to /usr/share/webapps/concrete5_backup.'
  echo 'To permanently remove concrete5, delete that directory and its contents.'
  echo ''
}

post_remove() {
  # Nothing needs to be done, so do a noop, as otherwise will get an error
  :
}

pre_upgrade() {
  oldpkgver=${2%-*}

  # Move the old installation temporarily
  mv /usr/share/webapps/concrete5 /usr/share/webapps/concrete$oldpkgver
}

post_upgrade() {
  newpkgver=${1%-*}
  oldpkgver=${2%-*}

  # Apply the newest concrete5 update into /usr/share/webapps/concrete5/updates
  mv /usr/share/webapps/concrete5 /usr/share/webapps/concrete$newpkgver
  mv /usr/share/webapps/concrete$oldpkgver /usr/share/webapps/concrete5
  mv /usr/share/webapps/concrete$newpkgver /usr/share/webapps/concrete5/updates

  echo ''
  echo 'The latest concrete5 update was placed in /usr/share/webapps/concrete5/updates.'
  echo 'Go to Dashboard -> System & Settings -> Backup & Restore -> Update concrete5'
  echo '  to finish the update process.'
  echo ''
}