post_remove() {
  # Since this wasn't done in package() we need to leave this unsafe code in for who knows how long? 2018-04-18
  if [ -d '/usr/share/ppd' ] ; then
    rm -f /usr/share/ppd/CN*ZK.ppd
  fi
}

_fn_post_up() {
  # This creates duplicate entries in CUPS. It should have been done in package()
  #if [ -d '/usr/share/ppd' ] ; then
  #  cd '/usr/share/cups/model'
  #  for fn in CN*ZK.ppd ; do \
  #    ln -sf "/usr/share/cups/model/$fn" "/usr/share/ppd/$fn"
  #  done
  #fi
  chmod 4755 '/usr/bin/cnpkmoduleufr2'
}

post_upgrade() {
  post_remove
  _fn_post_up
}

post_install() {
  _fn_post_up
  echo '
>>> Installation:
>>> 1) Make sure CUPS is running and your printer is turned on and connected to your computer.
>>> eg.
>>> systemctl start cups
>>>
>>> 2) Check the name of the device, udev created for you.
>>> eg. /dev/usb/lp0
>>>
>>> 3) /usr/bin/lpadmin -p [Printer Name] -m [PPD file] -v usb:[device file location] -E
>>> eg.
>>> /usr/bin/lpadmin -p LBP2900 -m CNCUPSLBP2900CAPTK.ppd -v usb:/dev/usblp0 -E
>>> you can find ppds in the /usr/share/cups/model/ directory)
>>>
>>> 4) Now you can print. Consider using "systemctl enable cups" to have it start automatically on boot
'
}