#! /bin/sh

set -e

rm_udevrule() {
    PKG="$1"
    CONFFILE="$2"

    if [ -e "$CONFFILE" ]; then
        md5sum="$(md5sum "$CONFFILE" | awk '{print $1}')"
        old_md5sum="$(dpkg-query -W -f='${Conffiles}' $PKG | sed -n -e "\' $CONFFILE ' { s/ obsolete$//; s/.* //; p }")"
        if [ "$md5sum" = "$old_md5sum" ]; then
            rm -f "$CONFFILE"
        fi
    fi
}

case "$1" in
    upgrade|install|abort-upgrade)
	# Remove symlink, dpkg doesn't like it at all
	if [ -h /usr/share/doc/hplip ]; then
		rm -f /usr/share/doc/hplip
	fi

	# Stop and remove any daemon from old HPLIP installations
	if [ -x /etc/init.d/hplip ]; then
		pkill hpiod || true
		if pgrep hpiod >/dev/null; then sleep 3; pkill -9 hpiod || true; fi
		if pgrep hpiod >/dev/null; then
			echo 'Old HPLIP daemon (hpiod) should have been stopped, but did not.  Please kill manually before hplip can proceed'
		    exit 1
		fi
		rm -fR /etc/init.d/hplip
	        update-rc.d -f hplip remove
	fi

	# Remove obsolete config file for HPLIP startup script
	rm -f /etc/default/hplip

	# Remove obsolete udev rules
	rm_udevrule hplip /etc/udev/rules.d/55-hpmud.rules
	rm_udevrule hplip /etc/udev/rules.d/45-hplip.rules
	rm_udevrule hplip /etc/udev/rules.d/024_hpmud.rules
	rm_udevrule hplip /etc/udev/rules.d/56-hpmud_support.rules
	rm_udevrule hplip /etc/udev/rules.d/z60_hplip.rules
	rm_udevrule hplip /etc/udev/rules.d/86-hpmud_plugin.rules
	rm_udevrule hplip /etc/udev/rules.d/56-hpmud_add_printer.rules
	rm_udevrule hplip /etc/udev/rules.d/40-hplip.rules

    ;;

    *)
        echo "preinst called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac



exit 0