Programmatically adds an AirPrint printer, ideally with an icon

Install_AirPrint_Printer.sh

#!/bin/bash

# Use the built-in ipp2ppd tool to create a PPD file for AirPrint
# Add icon to PPD (if we can get one) and install the printer

# Required printer info
readonly PRINTER_IP='XXX.XXX.XXX.XXX'
readonly PRINTER_NAME='PRINTER_NAME'
readonly PRINTER_DISPLAY_NAME='PRINTER NAME'
readonly PRINTER_LOCATION='PRINTER LOCATION'
# Requiring icon will prevent install if we can't get it
readonly REQUIRE_ICON=true
#readonly REQUIRE_ICON=false
# Number of seconds to wait for TCP verification before exiting
readonly CHECK_TIMEOUT=2
# Custom PPD info
readonly PPD_PATH='/tmp'
readonly PPD="${PPD_PATH}/${PRINTER_NAME}.ppd"
# Base info
readonly AIR_PPD='/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/PrintCore.framework/Versions/A/Resources/AirPrint.ppd'
readonly EXE='/System/Library/Printers/Libraries/ipp2ppd'
readonly ICON_PATH='/Library/Printers/Icons'
readonly ICON="${ICON_PATH}/${PRINTER_NAME}.icns"

AppendPPDIcon() {
	# Verify we have a file
	if [ ! -f "$ICON" ] && [ "$ICON_AVAILABLE" != "false" ]; then
		/bin/echo "Don't have an icon. Exiting..."
		exit 1
	fi

	/bin/echo "Appending ${ICON} to ${PPD}..."
	# Append the icon to the PPD
	/bin/echo "*APPrinterIconPath: \"${ICON}\"" >> "${PPD}"
}

CheckPrinter() {
	# Verify we can communicate with the printer via the AirPrint port via TCP
	local CHECK=$(/usr/bin/nc -G ${CHECK_TIMEOUT} -z ${PRINTER_IP} 631 2&> /dev/null; /bin/echo $?)

	if [ "$CHECK" != 0 ]; then
		/bin/echo "Cannot communicate with ${PRINTER_IP} on port 631/tcp. Exiting..."
		exit 1
	fi
}

CheckIcon() {
	# Query & parse printer icon, largest usually last?
	readonly PRINTER_ICON=$(/usr/bin/ipptool -tv ipp://${PRINTER_IP}/ipp/print get-printer-attributes.test \
	| /usr/bin/awk -F, '/printer-icons/ {print $NF}')

	# Verify we have an icon to download
	if [ -z "$PRINTER_ICON" ] && [ "$REQUIRE_ICON" = "true" ]; then
		/bin/echo "Did not successfully query a printer icon. Will not install printer. Exiting..."
		exit 1
	elif [ -z "$PRINTER_ICON" ]; then
		/bin/echo "Did not successfully query printer icon. Will continue with printer install..."
		readonly ICON_AVAILABLE=false
	fi

	/bin/echo "Downloading printer icon from ${PRINTER_ICON} to ${ICON}..."
	# Download the PNG icon and make it an .icns file
	/usr/bin/curl -skL "$PRINTER_ICON" -o "$ICON"
	
	# Did we actually write an icon successfully?
	STATUS=$(echo $?)
	if [[ "${STATUS}" != 0 ]]; then
		/bin/echo ""
		/bin/echo "Was not able to write the file ${ICON}..."
		/bin/echo "Does the user running this script have the ability to write to ${ICON_PATH}?"
		/bin/echo "If not, either run with 'sudo' or choose a different location to write the icon file."
		exit 1 
	fi
}

CreatePPD() {
	# Create the PPD file
	/bin/echo "Creating the .ppd file at ${PPD}..."
	$EXE ipp://${PRINTER_IP} "$AIR_PPD" > "$PPD"
}

InstallPrinter() {
	/bin/echo "Installing printer..."
	/usr/sbin/lpadmin -p ${PRINTER_NAME} -D "${PRINTER_DISPLAY_NAME}" -L "${PRINTER_LOCATION}" -E -v ipp://${PRINTER_IP} -P ${PPD} -o printer-is-shared=false
}

main() {
	CheckPrinter
	CreatePPD
	CheckIcon
	AppendPPDIcon
	InstallPrinter
}

main "@"

What's new in this fork? Did you add features or fix bugs?