roast

A JVM starter in Rust

roast is a small executable that launches a JVM, similar to what using jpackage would output. It uses a config file to determine some options, following packr json format:

{
  "classPath": [
    "my-game.jar"
  ],
  "mainClass": "io.github.fourlastor.gdx.lwjgl3.Lwjgl3Launcher",
  "useZgcIfSupportedOs": true,
  "vmArgs": [
    "-Xmx1G"
  ]
}

In addition to launching the JVM, it hints Windows systems with hybrid GPU setups (NVIDIA Optimus, AMD PowerXpress) to use the discrete GPU.

API

roast will look for the following in its containing folder:

1. Config file config.json and the referenced jars.
2. A JDK/JRE (or a minimized image from jlink) in a folder called jdk