Ubuntu Minecraft Installation script

minecraft_installer.sh

#!/bin/bash


# Alloc's Minecraft Installer:

# feel free to change, update, improve, and release this script

# suggestions of feedback? reach me at alloc@dr.com

# This script, in no way, is directly distributing any protected minecraft files
# all files are downloaded directly from minecraft.net. Don't worry, you won't be
# breaking the "one big rule" :)

# happy mining!

# latest update 4/20/2011


echo ""
echo "@-------------------------------------------@"
echo "@     Alloc's Bash Minecraft Installer      @"
echo "@     Verion 1.8                            @" 
echo "@                                           @"
echo "@     Please feel free to improve           @"
echo "@     this script however you desire.       @"
echo "@                                           @"
echo "@     Alloc@dr.com                          @"
echo "@-------------------------------------------@"

counter=1

#----------------------------------#
#           DOTS FUNCTION          #
#----------------------------------#
# this function simply prints three dots. It waits .1 seconds between each dot
function dots {
while [ $counter -le 3 ]
do
echo -ne "."
sleep .1
((counter++))
done
let counter=1
echo
}
## END DOTS

#----------------------------------#
#         INSTALL FUNCTION         #
#----------------------------------#
# This is the main install function, here all the files are downloaded/created and installed
function Install {
# the first thing it does is check to see if the .minecraft folder already exists
# if so, then we don't need to create a new one, if not, we do.
if [ -e /home/$(whoami)/.minecraft ]
then
	echo  ".minecraft folder exists"
	if [ -e /home/$(whoami)/.minecraft/minecraft.jar ]
	then
		echo  -ne "have you run this before?"
		dots
	
	fi
	echo ""
else 
echo -ne "creating /home/$(whoami)/.minecraft"
dots
cd /home/$(whoami)
mkdir .minecraft
fi	




#--------------------------------------------
cd /home/$(whoami)/.minecraft
#--------------------------------------------
# after the .minecraft folder is created, the script checks for Sun-Java
# by checking to see if the installation folder is present, if so, then
# it will not download it, however it will still make sure that sun-java
# is default, just in case openjdk is already installed
echo -ne "looking for Sun-Java"
dots
if [ -e /usr/lib/jvm/java-6-sun ] 
then
	if [ -e /usr/lib/jvm/java-6-sun/bin ]
	then 
		if [ -e /usr/lib/jvm/java-6-sun/bin/java ]
		then
		echo "Sun-Java is already Installed!"
		echo -ne "We need to make sure that it is the default Java installation"
		dots
		echo "Don't worry if you see lots of errors"
		echo "this requires root access"
		# setting the default java creates alot of unneeded text, therefore it is done 
		# in a new terminal window, because people dont' really need to see it
		sudo gnome-terminal -x sudo update-java-alternatives -s java-6-sun
		echo "Sun Java set as Default."
		fi
	fi
echo ""
else
echo -ne "you'll need to install Sun-Java-JRE"
dots
echo "this will require root access!"
echo "prepare for lots of text!"
sudo apt-get install sun-java6-jre sun-java6-plugin
sudo update-java-alternatives -s java-6-sun
echo ""
echo ""
echo ""
echo " JAVA INSTALL SUCCESSFUL!"
echo "------------------------------------"
echo ""
echo ""
echo ""

fi 

#--------------------------------------------
# the .jar file is simply downloaded to the .minecraft folder from minecraft.net
# it first checks to see if the user already has it, if so, it won't be downloaded
echo -ne downloading minecraft.jar
dots
if [ -e /home/$(whoami)/.minecraft/minecraft.jar ] 
then
echo looks like you already downloaded it!
else
wget -q www.minecraft.net/download/minecraft.jar
echo "downloaded."
fi
echo""
echo -ne downloading icon
# the icon is also downloaded from minecraft.net, only if needed
dots
if [ -e /home/$(whoami)/.minecraft/icon.png ] 
then
echo "you already have the icon!"
else
wget -q http://www.minecraft.net/favicon.png
mv favicon.png icon.png
echo saved to /home/$(whoami)/.minecraft
fi
echo ""
#---------------------------------------------
echo -ne writing bin shell
# this writes a seperate shell script in the /usr/local/bin folder, this is what allows the user
# to run minecraft from terminal, just by typing minecraft.
dots
if [ ! -e /usr/local/bin/minecraft ] 
then
touch minecraft
echo java -jar /home/$(whoami)/.minecraft/minecraft.jar >> minecraft
echo -ne saving to usr/local/bin
dots
echo this requires root access:
sudo cp minecraft /usr/local/bin/
cd /
cd /usr/local/bin
sudo chmod +x minecraft
echo "done"
else 
echo excecutable already written
fi
echo ""
#--------------------------------------------
echo -ne writing desktop shortcut
dots
cd /home/$(whoami)/.minecraft/
if [ -e /home/$(whoami)/.minecraft/install_files ] 
then
echo -ne previous version detected, updating
dots
rm -rf install_files
fi
mkdir install_files
cd install_files

touch alloc-installer.desktop
echo "[Desktop Entry]" >> alloc-installer.desktop
echo "Type=Application" >> alloc-installer.desktop
echo "Encoding=UTF-8" >> alloc-installer.desktop
echo "Name=Minecraft" >> alloc-installer.desktop
echo "Comment=awesome game" >> alloc-installer.desktop
echo Exec= java -jar /home/$(whoami)/.minecraft/minecraft.jar >> alloc-installer.desktop
echo Icon= /home/$(whoami)/.minecraft/icon.png  >> alloc-installer.desktop
echo Categories=Game >> alloc-installer.desktop
echo "Terminal=false" >> alloc-installer.desktop
#----------------------------------------------------
echo -ne granting the shortcut excecution permissions
dots
echo this requires root access
cp alloc-installer.desktop /home/$(whoami)/Desktop
sudo chmod +x /home/$(whoami)/Desktop/alloc-installer.desktop
echo "done"
echo ""
#---------------------------------------------
echo -ne writing menu item
dots
touch alloc-menu.directory
echo [Desktop Entry] >> alloc-menu.directory
echo Value=1.0 >> alloc-menu.directory
echo Type=Directory >> alloc-menu.directory
echo Encoding=UTF-8 >> alloc-menu.directory
echo "done"
echo ""
echo -ne installing to Applications menu
dots
xdg-desktop-menu install alloc-menu.directory alloc-installer.desktop
xdg-desktop-menu forceupdate
echo installed
#--------------------------------------------
echo ""
echo "SUCCESS!"
echo ""
echo -e "Minecraft has been successfull Downloaded and Installed \nCheck your desktop and Applications menu for launchers! \nYou can also run it from terminal with a 'minecraft' command! \ncontact: alloc@dr.com" 
echo "Happy Mining!"

echo""

}
## END INSTALL

#----------------------------------#
#       UNINSTALL FUNCTION         #
#----------------------------------#
function Uninstall {
echo -ne "Looking for Minecraft"
dots
if [ ! -e /home/$(whoami)/.minecraft/minecraft.jar ]
then
	echo -ne "  -folder not detected"
	dots
	if [ ! -e /usr/local/bin/minecraft ]
	then
	echo -ne "  -bin launcher not detected"
	dots
	echo""
	echo "Minecraft doesn't seem to be installed!"
	Main
	return
	fi
fi
echo "Minecraft found!"
echo -ne "Uninstalling Minecraft"
dots
echo "NOTE: You're save files will be kept"
cd /home/$(whoami)/.minecraft
echo ""
echo -ne "Deleting files and folders"
dots
rm -rf bin
rm -rf texturepacks
rm minecraft.jar
if [ -e options.txt ]
then
	rm options.txt
fi
if [ -e lastlogin ]
then
	rm lastlogin
fi
rm minecraft
rm -rf resources
rm icon.png
cd install_files
echo "Removing Application Launcher"

xdg-desktop-menu uninstall alloc-menu.directory alloc-installer.desktop
echo "Removing Desktop Shortcut"
rm /home/$(whoami)/Desktop/alloc-installer.desktop
rm -rf /home/$(whoami)/.minecraft/install_files
echo ""
echo -ne "Removing Binary Launcher"
dots
echo "this requires root access:"
sudo rm /usr/local/bin/minecraft
echo ""
echo "Minecraft has been uninstalled :(" 

}
## END UNINSTALL

#----------------------------------#
#     TROUBLESHOOT FUNCTION        #
#----------------------------------#
function TroubleShoot {
echo ""
echo ""
echo "#----------------------------------#"
echo "#       Troubleshooting Menu       #"
echo "#----------------------------------#"

echo "What would you like to do? (enter number of choice)"; echo "";
echo "1. install/update Sun-Java"
echo "2. install/update OpenJDK"
echo "3. use Sun-Java to run minecraft from now on"
echo "4. use OpenJDK to run minecraft from now on (not generally encouraged)"
echo "5. these options didn't fix it!"
echo "6. return to the main menu"
TINPUT=0
read TINPUT
if [ $TINPUT -eq 1 ]
then
	echo -ne "Installing/Updating Sun-Java"
	dots
	echo "this requires root access:"
	sudo apt-get install sun-java6-jre
	echo ""; echo ""; echo; echo "Finished!"; echo "";
	TroubleShoot
else
if [ $TINPUT -eq 2 ]
then
	echo -ne "Installing/Updating OpenJDK"
	dots
	echo "this requires root access:"
	sudo apt-get install openjdk-6-jre
	echo ""; echo ""; echo; echo "Finished!"; echo "";
	TroubleShoot
else
if [ $TINPUT -eq 3 ]
then
	echo -ne "Making Sun-Java the default"
	dots
	echo "Don't worry if you see lots of errors"

	sudo gnome-terminal -x sudo update-java-alternatives -s java-6-sun
	echo ""; echo ""; echo; echo "Finished!"; echo "";
else 
if [ $TINPUT -eq 4 ]
then
	echo -ne "Making OpenJDK the default"
	dots
	echo "Don't worry if you see lots of errors"

	sudo gnome-terminal -x sudo update-java-alternatives -s java-6-openjdk
	echo ""; echo ""; echo; echo "Finished!"; echo "";
else
if [ $TINPUT -eq 5 ]
then
echo "-------------------------------------------------"
echo "if these troubleshooting options didn't fix your,"
echo "problem, I'd be glad to help you out! "
echo "Alloc@dr.com"
echo "-------------------------------------------------"
read NOTHING
Main
else
if [ $TINPUT -eq 6 ]
then
return
else
echo invalid choice
TroubleShoot
fi
fi
fi
fi
fi
fi
}

## END TROUBLESHOOT

#----------------------------------#
#          MAIN FUNCTION           #
#----------------------------------#
function Main {
echo ""
echo "------------------------------------------------------"
echo "What would you like to do? (enter number of choice) "; echo "";
INPUT=0
while [ $INPUT != 1 ] && [ $INPUT != 2 ] && [ $INPUT != 3 ]
do
echo "1. Install Minecraft"
echo "2. Uninstall Minecraft"
echo "3. Troubleshooting"
echo "4. Exit"
if [ -e /usr/local/bin/minecraft ] && [ -e /home/$(whoami)/.minecraft/minecraft.jar ]
then
echo "5. Play Minecraft!"
fi
read INPUT
if [ $INPUT -eq 1 ] 
then
	Install
	Main
	return
else 
if [ $INPUT -eq 2 ] 
then
	Uninstall
	Main
	return
else
if [ $INPUT -eq 3 ]
then
	TroubleShoot
	Main
	return
else
if [ $INPUT -eq 4 ]
then
	return
else
if [ $INPUT -eq 5 ] && [ -e /usr/local/bin/minecraft ] && [ -e /home/$(whoami)/.minecraft/minecraft.jar ]
then
minecraft
else

	echo "invalid choice"
	Main
fi
fi
fi
fi
fi

done
}


#----------------------------------#
#      CALL THE MAIN FUNCTION      #
#----------------------------------#

Main

# THE END