A shell script dedicated to automatically downloading and setting up a ModCoderPack workspace. Now includes more functionality than ever!

mcp_setup.sh

#!/bin/sh

# I highly recommend this video: https://www.youtube.com/watch?v=b2gJfKNSb1k
# It can help troubleshoot, and is the sole reason I decided to even expand this script for such complex tasks in the first place

# update these urls correctly for yourself
MC_VERSION="1.8.8" # just the minecraft version you are planning to decompile
MCP_ZIP="http://www.modcoderpack.com/files/mcp918.zip" # the modcoderpack zip. Download the one closest to your version
SERVER_JAR="https://launcher.mojang.com/v1/objects/5fafba3f58c40dc51b5c3ca72a98f62dfdae1db7/server.jar" # the server jar. Download the exact one for your version
MAPPINGS_ZIP="http://export.mcpbot.bspk.rs/mcp_stable/20-1.8.8/mcp_stable-20-1.8.8.zip" # the obfuscated mappings. Download the stable ones, if possible
PATCHES_ZIP="https://bitbucket.org/ProfMobius/mcpbot/raw/f53f7839cb0524a918c1d772b495243f18c8f9b0/mcp-$MC_VERSION-srg.zip" # the patches for each version. Download for your exact version, however if not possible, do note that any close version may work

# directory path. Be careful with this, and NEVER leave this as just $PWD, as it will overwrite itself and anything inside the folder due to the rm -rf instructions below
MCP_DIR=$PWD/mcp
OG_DIR=$PWD

# only set these values if you are trying to decompile a custom jar file. WARNING, this will take a little bit longer, since it decompiles twice, once for vanilla, and once for custom.
# additionally, decompiling a custom jar WILL cause errors. That is unavoidable. You will need to fix all of them yourself
BACKUP_DIR=$MCP_DIR/backup

function download() {
  # $1 = File to download
  # $2 = Directory to save in
  # $3 = Any custom names for the file
  # $4 = Is it a zip? Should it have 'unzip' run on it?

  cd $2 # the directory must have been created prior
  wget $1 -O $3 # download the file
  if [ $4 = "true" ]; then
    unzip -o $3 && rm $3 # unzip (-o means force overwrite anything that may be similar and collides) and remove
  fi
}

function replace() {
  # $1 = text to replace
  # $2 = replacement text
  # $3 = file path
  sed -i "s/$1/$2/" $3
}

function decompile_custom() {
  echo "Setting up environment for custom jar..."
  rm -rf $BACKUP_DIR
  mkdir $BACKUP_DIR
  python2 runtime/cleanup.py "$@" --force # remove all decompiled code, leaving the libraries and other's for reuse
  mv $MCP_DIR/jars/versions/$MC_VERSION/$MC_VERSION.jar $BACKUP_DIR/$MC_VERSION.jar # copy the jar, do not remove it just yet
  echo "### Decompiling a custom jar ###"
  echo "Please download the jar file, and place it into the backup folder, name is custom.jar"
  echo "The script will extract and wrap it back into a decompilable jar merged with Minecraft's code"
  echo "Please make sure the jar file you are providing is actually a minecraft jar and not a mod"
  echo "You can tell if it has a.class aa.class or such within it, alongside assets, net or other folders"
  read -n1 -s -r -p "Press any key when you have completed and read the above steps..."
  cd $BACKUP_DIR
  mkdir tmp
  cp $MC_VERSION.jar tmp/$MC_VERSION.jar && cp custom.jar tmp/custom.jar # copy the jars into the temporary folder
  cd tmp
  jar xvf $MC_VERSION.jar && jar xvf custom.jar # extract both jars into the tmp directory. MC_VERSION must go first, so custom.jar, when extracting, will overwrite all same files
  rm $MC_VERSION.jar && rm custom.jar # remove both
  jar cvf $MC_VERSION-custom.jar * # create a jar file with all the extracted and replaced contents
  mv $MC_VERSION-custom.jar $MCP_DIR/backup/$MC_VERSION-custom.jar
  cd $MCP_DIR/backup
  rm -rf tmp
  mv $MC_VERSION-custom.jar $MCP_DIR/jars/versions/$MC_VERSION/$MC_VERSION.jar # represent the 'vanilla' jar, MCP will be tricked into decompiling this

  cd $MCP_DIR
  python2 runtime/decompile.py "$@" # call decompile again. This time, it will attempt to decompile the new jar instead.
}

clear # initial clear.
echo "### Please Read ###"
echo "Make sure you've run MC $MC_VERSION at least once on the official launcher"
echo "Make sure that the directory $MCP_DIR contains no important files"
echo "WARNING: Errors may be present in the code. They will not be large issues"
echo "Please attempt to correct them manually. This script will not fix them for you"
read -n1 -s -r -p "Press any key if you understand and wish to continue..."

clear # final clear. Never clear again
echo "Downloading various files..."
rm -rf $MCP_DIR # if it already exists, remove it
mkdir $MCP_DIR

echo "Downloading MCP..."
download $MCP_ZIP $MCP_DIR "mcp.zip" "true"
echo "Downloading server jar..."
download $SERVER_JAR $MCP_DIR/jars "minecraft_server.$MC_VERSION.jar" "false"
echo "Downloading and applying specified mappings..."
download $MAPPINGS_ZIP $MCP_DIR/conf "mappings.zip" "true"
# note, it is usually not necessary to download the patches. Only uncomment the following if it fails to correctly decompile without them
echo "Downloading and applying specified patches..."
download $PATCHES_ZIP $MCP_DIR/conf "patches.zip" "true"

echo "Updating version.cfg to accept configured version..."
# the reason we can't wildcard anything before Version is that MCP will change, and I don't really want to do that.
replace "ClientVersion =.*" "ClientVersion = $MC_VERSION" $MCP_DIR/conf/version.cfg
replace "ServerVersion =.*" "ServerVersion = $MC_VERSION" $MCP_DIR/conf/version.cfg

echo "Decompiling Minecraft"
cd $MCP_DIR # return to the main directory
python2 runtime/decompile.py "$@"
# only uncomment below if decompiling a custom jar as well
# decompile_custom
zip -r $OG_DIR/mcp_workspace.zip $MCP_DIR