Gradle build setup for minecraft 1.8.9 server. (there is no server source code)
to compile minecraft, you obviously need the source code. to get the code you need to decompile minecraft server 1.8.9 jar from https://mcversions.net/download/1.8.9. to decompile the jar using mcp (using fernflower) you need to first download mcp 1.8.8 from http://www.modcoderpack.com/
then put the server jar in the mcp/jars folder. then name the jar to minecraft_server.jar.
make sure your java version is 8 and run ./decompile.sh for linux and decompile.bat for windows (requires python2, modify the script to execute python2).
you might also need to have the client installed so it will also decompile the client. after it decompiled, you can copy the net folder in mcp/src/minecraft_server
and paste it in your project src directory (/src/java). do not touch netty and guava versions in build.gradle because it causes problems and minecraft code uses those versions.
if you found any higher version of guava or netty that supports minecraft's code, feel free to open a pull request or issue
You can use ./gradlew shadowjar to compile the server. After the compilation process, you should be able to find the
compiled jar file in build/libs directory. Using Java 8 is Recommended.