minecraft

#!/bin/sh

GAME_DIR="$HOME/.mclauncher"
BASE_DIR="$GAME_DIR/nofollow"
BACK_DIR="$BASE_DIR/backups"

# Check that the mclauncher directory exists
if [ ! -d "$GAME_DIR" ]; then
  echo "ERROR: mclauncher directory doesn't exist. (Have you ran 'mcltool setup'?)"
  exit 1
fi

# If another minecraft install was specified attempt to use it
if [ -n "$1" ]; then
  [ "$1" != "nofollow" -a -d "$GAME_DIR/$1" ] && MCDIR="$GAME_DIR/$1"
  if [ -n "$MCDIR" ]; then
    if [ -e "$HOME/.minecraft" -o -h "$HOME/.minecraft" ]; then
      unlink $HOME/.minecraft >/dev/null 2>&1
      if [ "$?" != "0" ]; then
        echo "ERROR: Unable to unlink ~/.minecraft"
        exit 1
      fi
    fi
    ln -s $MCDIR $HOME/.minecraft
  else
    echo "ERROR: '$1' does not exist"
    exit 1
  fi
fi

MCNAME="$(basename $(readlink $HOME/.minecraft))"

# Check the vanilla minecraft version and make a backup if needed
if [ -e "$HOME/.minecraft/bin/minecraft.jar" -a "$MCNAME" = "vanilla" ]; then
  MCVER="$(unzip -qqp $HOME/.minecraft/bin/minecraft.jar net/minecraft/client/Minecraft.class | grep -Eao "Minecraft Minecraft [A-Za-z0-9\.-]+" | cut -c21-)"
  [ ! -e "$BACK_DIR/$MCVER.jar" ] && cp "$HOME/.minecraft/bin/minecraft.jar" "$BACK_DIR/$MCVER.jar"
fi

# Have java take over the process from here
echo "Starting '$MCNAME'..."
exec java -jar $GAME_DIR/minecraft.jar