This project is based on the work of DecompilerMC and is up to date with this commit 3a8aa87
What is this for?
This tool generates git-like diff of two minecraft versions src.
Primary usage is to check what Mojang has changed between two versions in terms of server architecture.
Important Note
This project requires any of the JetBrains IDE to compare the decompiled versions.
You need an internet connection to download the mappings, you can ofc put them in the respective folder if you have them physically
We support Windows and probably MacOS and linux
You need a java runtime inside your path (Java 8 for older versions, Java 11+ for newer versions)
CFR decompilation is approximately 60s and fernflower takes roughly 200s, please give it time
You can run it directly with python 3.11+ with python3 main.py
You can find the jar and the version manifest in the ./versions/ directory
The code will then be inside the folder called ./src/<name_version(option_hash)>/<side>
The ./tmp/ directory can be removed without impact
Usage
usage: main.py [-h] [--ide-location [IDE_LOCATION]] [--re-download] [--no-compare] [--fern-flower] version [compare]
Decompile and Compare two Minecraft versions
positional arguments:
version Minecraft Version 1
compare Minecraft Version 2 (Default Latest Snapshot)
options:
-h, --help show this help message and exit
--ide-location [IDE_LOCATION], -l [IDE_LOCATION]
Provide JetBrains IDE location or PATH name
--re-download, -rd Force re-download
--no-compare, -nc Skip comparing the decompiled versions
--fern-flower, -ff Use FernFlower Decompiler instead of CFR
If no -l argument is provided, script will try to use idea64.exe from path.
Examples
Compare 1.17.1 server src to the latest snapshot
python3 main.py -l "C:\Program Files\Jetbrains\apps\IDEA-U\ch-0\241.15989.150\bin\idea64.exe" 1.17.1
Compare 1.17.1 server src to the latest snapshot
python3 main.py -l "C:\Program Files\Jetbrains\apps\IDEA-U\ch-0\241.15989.150\bin\idea64.exe" 1.17.1 snap
Compare 1.17.1 server src to the latest full release
python3 main.py -l "C:\Program Files\Jetbrains\apps\IDEA-U\ch-0\241.15989.150\bin\idea64.exe" 1.17.1 latest
Compare 1.17.1 server src to 1.17.2
python3 main.py -l "C:\Program Files\Jetbrains\apps\IDEA-U\ch-0\241.15989.150\bin\idea64.exe" 1.17.1 1.17.2
Compare 1.17.1 server src to 1.17.2 using FernFlower
python3 main.py -l "C:\Program Files\Jetbrains\apps\IDEA-U\ch-0\241.15989.150\bin\idea64.exe" -ff 1.17.1 1.17.2
You can probably use it as executable by creating a standalone executable with pyinstaller, although I haven't fully tested it yet.
pip install pyinstaller
pyinstaller main.py --distpath build --onefile