mc-launcher

mc-launcher is a zero-dependency (lightweight) helpful crate, that adds functionality to run Minecraft via Rust.

Features

• Lightweight
• Fast
• authlib-injector support

Installation

cargo add mc-launcher

Usage

Minecraft's game_dir structure

.minecraft/
  🗁 assets/
  🗁 libraries/
  🗁 versions/
    🗁 <version_name>/
      🗁 natives
      🖹 client.json
      🖹 client.jar

Launching Minecraft

let config = MinecraftConfiguration {
  session: MinecraftSession {
    username: String::from("smxkin"), // username of player
    ..Default::default()
  },

  client: MinecraftClient {
    path: Path::new("C:\\Users\\smxkin\\AppData\\Roaming\\ru.riverfall.launcher\\clients\\technorpg").to_path_buf(),
    version: String::from("Forge 1.12.2"),
    ..Default::default()
  },

  ..Default::default()
};

MinecraftLauncher::new(config)
  .start()?;

Authlib-injector support

[!NOTE] The authlib-injector file should be located in .minecraft/libraries/moe/yushi/authlibinjector/<version>/authlibinjector-<version>.jar.

That is, for version 1.2.5 the path will be as follows: .minecraft/libraries/moe/yushi/authlibinjector/1.2.5/authlibinjector-1.2.5.jar.

MinecraftConfiguration {
  session: MinecraftSession {
    username: "smxkin", // username of player
    authlib_server: Some(AuthLibConfiguration {
        server: String::from("https://auth.mojang.com"),
        version: String::from("1.2.5")
      }),
    ..Default::default()
  },
};

Finding Java on PC

let java = Java::find()?;

Java version comparison

let java = Java::find()?;

if java.is_version_equal(8) {
  println!("Version == 8");
}

if java.is_version_at_least(8) {
  println!("Version >= 8");
}