git.slaskete.net - einar-bin/blob - minecraft.sh

   1 #!/bin/bash
   2 # This script assumes that you have prepared various versions of
   3 # Minecraft bin folders in your $MC_HOME like this:
   4 # ${MC_HOME}/bin-version (example: ${MC_HOME}/bin-1.2.5)
   5 #
   6 # The script tries to preserve the various versions of the bin folder
   7 # by copying the selected bin folder to a "working folder", to prevent
   8 # accidental updates on launch.
   9 #
  10 # Use at your own risk, changing minecraft versions around may result in
  11 # unexpected and undesirable behaviour. You may lose your saves.
  12 # This script does not handle backups of the world data, I suggest using
  13 # deja-dup or similar backup software. It's good for you.
  14
  15 # Written by Einar Jørgen Haraldseid <einar@haraldseid.net>
  16 # inspired by a similar idea by Lars Erik Pedersen
  17
  18 # Released to the public under the WTFPL: http://sam.zoy.org/wtfpl/COPYING
  19
  20 # CONFIG STUFF - change these to suit your system
  21 # Minecraft home folder, where the binaries and saves and stuff are stored:
  22 MC_HOME="${HOME}/.minecraft"
  23 # Location and filename for the Minecraft launcher jar:
  24 MC_LAUNCHER="${HOME}/bin/minecraft.jar"
  25 # Command line to run to start Minecraft:
  26 MC_COMMAND="java -Xmx2048M -Xms1024M -cp ${MC_LAUNCHER} net.minecraft.LauncherFrame"
  27
  28 # This might be needed to fix 64bit java on Linux (path to your 64bit java libs)
  29 # Uncomment this if not suitable.
  30 export LD_LIBRARY_PATH="/usr/lib/jvm/jre/lib/amd64/"
  31
  32
  33 # Here comes the code
  34
  35 if [ ${#} -ne 1 ]; then
  36         echo "Usage: 'minecraft <version>'"
  37         exit 1
  38 fi
  39
  40 if [ -z ${MC_HOME} ]; then
  41         echo "Minecraft home folder not set! Baaaad idea!"
  42         exit 1
  43 fi
  44
  45 if [ ! -d ${MC_HOME} ]; then
  46         echo "Minecraft home folder (${MC_HOME}) not found!"
  47         exit 1
  48 fi
  49
  50 MC_VERSION_FOLDER="${MC_HOME}/bin-${1}"
  51 MC_WORKING_FOLDER="${MC_HOME}/bin"
  52
  53 if [ ! -d "${MC_VERSION_FOLDER}" ]; then
  54         echo "Could not find that version folder (${MC_WORKING_FOLDER})."
  55         exit 1
  56 fi
  57
  58 if [ -d "${MC_WORKING_FOLDER}" ]; then
  59         rm -rf ${MC_WORKING_FOLDER}
  60 elif [ ! -d "${MC_WORKING_FOLDER}" ]; then
  61         echo "Minecraft bin folder (${MC_WORKING_FOLDER}) is not a directory, bailing out."
  62         exit 1
  63 fi
  64
  65 if [ ! -e "${MC_WORKING_FOLDER}" ]; then
  66         cp -r ${MC_VERSION_FOLDER} ${MC_WORKING_FOLDER}
  67         ${MC_COMMAND}
  68 fi