#!/bin/bash -e
# install_linuxwacom ver 1.1
#
# This script installs the linuxwacom driver for wacom tablets
#
# Last updated: Sep 21, 2008
# Kristi Tsukida <kristi.tsukida@gmail.com>

# check ubuntu version
ubuntu_ver=$(lsb_release -a 2>/dev/null| grep "^Release" | awk '{print $2}')
if [ $ubuntu_ver != "8.10" ] ; then
	echo "Your Ubuntu version: $ubuntu_ver"
	echo "Warning: This script was written for Ubuntu 8.10 Intrepid."
	echo "    Driver installation may not work on other Ubuntu releases."
	echo "    Continue installation anyway? [y/N]"
	read input
	if [ "$input" == "y" ] || [ "$input" == "Y" ] ; then
		echo "Continuing linuxwacom installation."
		echo ""
	else
		exit
	fi
fi

# check for previous tarball download
if [ -e linuxwacom-0.8.1-4.tar.bz2 ] ; then
	echo "Found existing linuxwacom-0.8.1-4.tar.bz2"
	echo "Delete this and re-download the file? (Else existing tarball will be used) [y/N]"
	read input
	if [ "$input" == "y" ] || [ "$input" == "Y" ] ; then
		# delete previous tarball
		rm linuxwacom-0.8.1-4.tar.bz2
		# download the tarball
		wget -nd http://prdownloads.sourceforge.net/linuxwacom/linuxwacom-0.8.1-4.tar.bz2
	fi
else
	# download the tarball
	wget -nd http://prdownloads.sourceforge.net/linuxwacom/linuxwacom-0.8.1-4.tar.bz2
fi

# install dependencies
echo "Installing dependencies.  (You may be prompted for your password)"
sudo apt-get update
sudo apt-get install linux-headers-$(uname -r) build-essential x11proto-core-dev libxau-dev libxdmcp-dev x11proto-input-dev x11proto-kb-dev xtrans-dev libx11-dev x11proto-xext-dev libxext-dev libxi-dev linux-libc-dev libc6-dev libncurses5-dev xserver-xorg-dev tk-dev tcl-dev -y
echo "Finished installing dependencies."
echo ""

# extract
tar xjvf linuxwacom-0.8.1-4.tar.bz2
cd linuxwacom-0.8.1-4

# X crashing fix
sed -i -e '381s/WCM_UNINIT_CALLED/WCM_XORG_XSERVER_1_4/' src/xdrv/wcmConfig.c

# compile
./configure --enable-wacom
make
echo "Finished compiling linuxwacom driver."
echo ""

# install driver
echo "Installing driver files.  (You may be prompted for your password)"
sudo make install
echo "Finished installing linuxwacom driver."
echo ""

# install kernel module
echo "Installing linuxwacom kernel module.  (You may be prompted for your password)"
if [ -f src/2.6.26/wacom.ko ] ; then
	# backup old kernel module
	cp --backup=numbered /lib/modules/$(uname -r)/kernel/drivers/input/tablet/wacom.ko wacom.ko.$(uname -r)
	sudo cp src/2.6.26/wacom.ko /lib/modules/$(uname -r)/kernel/drivers/input/tablet/wacom.ko
else
	# if the kernel was compatible, the make would have compiled the 2.6.26 driver
	echo "Warning: Your kernel version $(uname -r) is not compatible with"
	echo "    the 2.6.26 linuxwacom kernel module."
	# see if a differrent version was compiled
	module=$(find src -name wacom.ko)
	if [ -f "$module" ] ; then
		echo "Attempt to install $module? [y/N]"
		read input
		if [ "$input" == "y" ] || [ "$input" == "Y" ] ; then
			cp --backup=numbered /lib/modules/$(uname -r)/kernel/drivers/input/tablet/wacom.ko wacom.ko.$(uname -r)
			sudo cp "$module" /lib/modules/$(uname -r)/kernel/drivers/input/tablet/wacom.ko
		fi
	else
		echo "Incomplete linuxwacom installation.  Exiting."
		exit 1
	fi
fi

# reload the wacom kernel module
sudo rmmod wacom
sudo modprobe wacom

echo "Finished installing linuxwacom kernel module."
echo ""
echo "linuxwacom driver (0.8.1-4) installation complete."