#!/bin/sh
# Dolphin Build Script
# By Rob Vz, modified by Callum Dickinson

# FUNCTIONS
apt_dependencies() # Ubuntu/Debian/Linux Mint/many others
{
	sudo apt-get -y install cmake subversion g++ wx2.8-headers libwxbase2.8-dev libwxgtk2.8-dev libgtk2.0-dev libsdl1.2-dev nvidia-cg-toolkit libxrandr-dev libxext-dev libglew1.5-dev libao-dev libasound2-dev libpulse-dev libbluetooth-dev libreadline5-dev libavcodec-dev libavformat-dev libswscale-dev
}

yum_dependencies() # Fedora/Red Hat/CentOS/many others
{
	su -c 'yum -y install cmake subversion gcc-c++ wxGTK-devel wxBase wxGTK SDL-devel SDL Cg libXxf86vm libXxf86vm-devel libXext libXext-devel glew glew-devel cairo cairo-devel libao libao-devel bluez-devel bluez-libs-devel bluez-libs bluez'
}

zypper_dependencies() # openSUSE, and other distros relying on ZYpp for their RPM packaging
{
	sudo zypper -y install bluez-devel cmake subversion wxWidgets-devel wxGTK wxGTK-devel wxGTK-gl libSDL-devel libCg libCg-devel xorg-x11-libXext-devel xorg-x11-libX11-devel libao libao-devel gcc gcc-c++ readline5-devel readline5 cairo cairo-devel GLEW GLEW-devel
}

uwhich() # shell script-based which program from Ubuntu. Thanks! RPM-based distros usually don't have this.
{
	if test -n "$KSH_VERSION"; then
		puts() {
			print -r -- "$@"
		}
	else
		puts() {
			printf '%s\n' "$@"
		}
	fi
	ALLMATCHES=0
	while getopts a whichopts
	do
		case "$whichopts" in
		        a) ALLMATCHES=1 ;;
		        ?) puts "Usage: $0 [-a] args"; ALLRET=2 ;;
		esac
	done
	shift $(($OPTIND - 1)) # Shell-based libm math requirement poo
	if [ "$#" -eq 0 ]; then
		ALLRET=1
	else
		ALLRET=0
	fi
	case $PATH in
		(*[!:]:) PATH="$PATH:" ;;
	esac
	for PROGRAM in "$@"; do
		RET=1
		IFS_SAVE="$IFS"
		IFS=:
		case $PROGRAM in
	 		*/*)
				if [ -f "$PROGRAM" ] && [ -x "$PROGRAM" ]; then
					puts "$PROGRAM"
					RET=0
				fi
				;;
	 		*)
				for ELEMENT in $PATH; do
					[ -z "$ELEMENT" ] && ELEMENT=.
					if [ -f "$ELEMENT/$PROGRAM" ] && [ -x "$ELEMENT/$PROGRAM" ]; then
						puts "$ELEMENT/$PROGRAM"
						RET=0
						[ "$ALLMATCHES" -eq 1 ] || break
					fi
				done
				;;
		esac
		IFS="$IFS_SAVE"
		[ "$RET" -ne 0 ] && ALLRET=1
	done
	export ALLRET
}

# VARIABLES
folder="$HOME/dolphin-emu-read-only"
localrev="`svnversion $folder`"
remoterev="`svn info http://dolphin-emu.googlecode.com/svn/trunk/ | grep '^Revision:' | awk '{print$2}'`"
pkgmanager="`uwhich apt-get || uwhich yum || uwhich zypper`"

# Start process
if [ -d $folder ]; then
	echo "Your Current Revision is: $localrev"
	[ "$localrev" != "$remoterev" ] && echo -n "Would you like to update your Dolphin installation? (y/n) " || echo -n "Local revision is the same as the remote! Rebuild your Dolphin install? (y/n) "
	read des
	case "$des" in
		y|ye|yes) freshinst="1";;
	esac
else 
	echo "You haven't downloaded dolphin yet! No worries!"
	freshinst="1"
fi

if [ "$freshinst" = "1" ]; then
	echo "Detecting package manager and downloading dependencies..."
	case "$pkgmanager" in
		*apt-get*) apt_dependencies;;
		*yum*) yum_dependencies;;
		*zypper*) zypper_dependencies;;
	esac
	if [ "$localrev" != "$remoterev" ]; then
		echo "Revision $remoterev, coming right up!"
		svn co http://dolphin-emu.googlecode.com/svn/trunk $folder
	fi
	echo "Going into Dolphin Directory..."
	cd $folder
	echo "Configuring Using cmake..."
	mkdir -p Build && cd Build
	cmake ..
	echo "Building!"
	make
	echo "Installing!"
	[ "`echo $pkgmanager | grep yum`" ] && su -c 'make install' || sudo make install
	echo "All done!"
fi