#!/bin/sh

echo "Welcome to the Linux bzflag installation program."
echo "No files will be installed until after a final warning."
echo

#
# Check for root
#
if [ $EUID != 0 ]; then
	echo "You must run the bzflag install program as root."
	exit 1
fi

#
# Pick a destination
#
dest=/usr/local/bzflag
echo -n "Where would you like bzflag installed? [$dest] "
read ans
if [ x$ans != "x" ]; then
	dest=$ans
fi

#
# See if Mesa is installed
#
echo
echo "bzflag uses the Mesa libraries.  Versions of Mesa prior to"
echo "2.6 Beta 3 will not work correctly with bzflag."
installMesa=y
ans=x
while [ $ans != y -a $ans != n ]; do
	echo -n "Do you want to install the Mesa libraries packaged with bzflag? [y] "
	read ans
	ans=`echo ${ans}y | sed -e 'y/YN/yn/' -e 's/^\(.\).*/\1/'`
done
if [ $ans = n ]; then
	installMesa=n
fi

#
# Where should Mesa go?
#
mesaDest=$dest/lib
if [ $installMesa = y ]; then
	echo
	echo "Where would you like to install Mesa?  The directory"
	echo -n "will be created if it doesn't exist. [$mesaDest] "
	read ans
	if [ x$ans != "x" ]; then
		mesaDest=$ans
	fi
fi

#
# Check for 3Dfx board
#
use3Dfx=n
if [ -f /usr/local/glide/lib/libglide2x.so ]; then
	echo
	echo "You appear to have the 3Dfx libraries installed."
	ans=x
	while [ $ans != y -a $ans != n ]; do
		echo -n "Should bzflag try to use an installed 3Dfx board? [y] "
		read ans
		ans=`echo ${ans}y | sed -e 'y/YN/yn/' -e 's/^\(.\).*/\1/'`
	done
	if [ $ans = y ]; then
		use3Dfx=y
	fi
fi

#
# warn about requiring root access for 3Dfx board
#
nonRoot3Dfx=n
if [ $use3Dfx = y ]; then
	echo
	echo "Using the 3Dfx board requires that bzflag be run as superuser"
	echo "(so the glide libraries can access the hardware).  Since"
	echo "LD_LIBRARY_PATH is ignored for setuid programs, you must"
	echo "either run bzflag as superuser or add the paths to the"
	echo "Mesa and glide libraries to your ld.so.conf file.  This"
	echo "installer can add those entries and make bzflag setuid root"
	echo "so that regular users can run bzflag using the 3Dfx card."

	ans=x
	while [ $ans != y -a $ans != n ]; do
		echo -n "Make bzflag with 3Dfx available to all users? [y] "
		read ans
		ans=`echo ${ans}y | sed -e 'y/YN/yn/' -e 's/^\(.\).*/\1/'`
	done
	if [ $ans = y ]; then
		nonRoot3Dfx=y
	fi
fi

#
# about to install
#
echo
echo -n "About to begin installation.  Press enter to proceed."
read ans

#
# make directories
#
if [ ! -d $dest ]; then
	mkdir -p $dest
	if [ ! -d $dest ]; then
		echo "Failed to make bzflag directory $dest"
		exit 1
	fi
fi
if [ ! -d $dest/bin ]; then
	mkdir $dest/bin
	if [ ! -d $dest/bin ]; then
		echo "Failed to make bzflag bin directory $dest/bin"
		exit 1
	fi
fi
if [ ! -d $dest/data ]; then
	mkdir $dest/data
	if [ ! -d $dest/data ]; then
		echo "Failed to make bzflag data directory $dest/data"
		exit 1
	fi
fi
if [ $installMesa = y -a ! -d $mesaDest ]; then
	mkdir -p $mesaDest
	if [ ! -d $mesaDest ]; then
		echo "Failed to make Mesa directory $mesaDest"
		exit 1
	fi
fi

#
# Install the binaries
#
cp bin/* $dest/bin

#
# Install the data
#
cp data/* $dest/data

#
# Install Mesa libs
#
if [ $installMesa = y ]; then
	if [ $use3Dfx = y ]; then
		cp lib/lib3DfxMesaGL.so.2 $mesaDest/libMesaGL.so.2
	else
		cp lib/libMesaGL.so.2 $mesaDest/libMesaGL.so.2
	fi
	cp lib/libMesaGLU.so.2 $mesaDest
fi

#
# Add Glide and Mesa to system library path.  Just setting LD_LIBRARY_PATH
# in the wrapper script won't work because that variable isn't used for
# setuid executables.
#
ldConfig=n
if [ $installMesa = y ]; then
	egrep "^$dest/lib$" /etc/ld.so.conf >/dev/null 2>&1
	if [ $? -ne 0 ]; then
		echo $dest/lib >> /etc/ld.so.conf
		ldConfig=y
	fi
fi
if [ $nonRoot3Dfx = y ]; then
	egrep "^/usr/local/glide/lib$" /etc/ld.so.conf >/dev/null 2>&1
	if [ $? -ne 0 ]; then
		echo /usr/local/glide/lib >> /etc/ld.so.conf
		ldConfig=y
	fi
fi
if [ $ldConfig = y ]; then
	/sbin/ldconfig
fi

#
# Make the wrapper scripts
#
if [ $use3Dfx = y ]; then
	cat <<_EOS_ > $dest/bin/bzflag
#!/bin/sh -f

export LD_LIBRARY_PATH=${mesaDest}:/usr/local/glide/lib
export MESA_GLX_FX=fullscreen
$dest/bin/bzflag.real -directory $dest/data \$*

_EOS_
	if [ $nonRoot3Dfx = y ]; then
		chown root $dest/bin/bzflag.real
		chmod u+s $dest/bin/bzflag.real
	fi
else
	cat <<_EOS_ > $dest/bin/bzflag
#!/bin/sh -f

export LD_LIBRARY_PATH=${mesaDest}
$dest/bin/bzflag.real -directory $dest/data \$*

_EOS_
fi
chmod +x $dest/bin/bzflag

echo "Installation complete"