Fabric

This page describes how to integrate Lamp with Fabric, as well as what to expect out of it.

Setting up

Prerequisites

• Java 21 or newer

Adding Lamp dependency

To add Lamp to your project, add the following (depending on your project structure):

pom.xml

<dependencies>
  <!-- Required for all platforms -->
  <dependency>
      <groupId>io.github.revxrsal</groupId>
      <artifactId>lamp.common</artifactId> 
      <version>[VERSION]</version>
  </dependency>

  <!-- Fabric module -->
  <dependency>
      <groupId>io.github.revxrsal</groupId>
      <artifactId>lamp.fabric</artifactId>
      <version>[VERSION]</version>
  </dependency>  
  
  <!-- Optional: Brigadier module -->
  <dependency>
      <groupId>io.github.revxrsal</groupId>
      <artifactId>lamp.brigadier</artifactId>
      <version>[VERSION]</version>
  </dependency>
</dependencies>

build.gradle

dependencies {
   // Required for all platforms
   implementation 'io.github.revxrsal:lamp.common:[VERSION]'
   
   // Velocity module
   implementation 'io.github.revxrsal:lamp.fabric:[VERSION]'
   
   // Optional: Brigadier module
   implementation 'io.github.revxrsal:lamp.brigadier:[VERSION]'
}

build.gradle.kts

dependencies {
    // Required for all platforms
    implementation("io.github.revxrsal:lamp.common:[VERSION]")
    
    // Velocity module
    implementation("io.github.revxrsal:lamp.fabric:[VERSION]")
    
    // Optional: Brigadier module
    implementation("io.github.revxrsal:lamp.brigadier:[VERSION]")
}

Latest version:

Optional: Preserve parameter names

Lamp identifies parameters by their names and uses them to generate relevant command metadata. By default, Java does not preserve parameter names reflectively. You need to add the following to your project:

pom.xml

<plugins>
  <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>3.8.0</version>
    <configuration>
      <compilerArgs>
        <!-- Preserves parameter names -->
        <arg>-parameters</arg>
      </compilerArgs>
    </configuration>
  </plugin>
</plugins>

build.gradle

compileJava { 
    // Preserve parameter names in the bytecode
    options.compilerArgs += ["-parameters"]
}

// optional: if you're using Kotlin
compileKotlin {
    kotlinOptions.javaParameters = true
}

build.gradle.kts

tasks.withType<JavaCompile> {
    // Preserve parameter names in the bytecode
    options.compilerArgs.add("-parameters")
}

// optional: if you're using Kotlin
tasks.withType<KotlinJvmCompile> {
    compilerOptions {
        javaParameters = true
    }
}

Fabric-specific annotations

@CommandPermission

Adds a command permission level for the given command

Supported Fabric types

• net.minecraft.server.command.ServerCommandSource and its subclasses in place of CommandActor

• net.minecraft.server.network.ServerPlayerEntity

• net.minecraft.world.World

Example

Java

public class MyMod implements ModInitializer {

    @Override
    public void onInitialize() {
        var lamp = FabricLamp.builder(this).build();
        lamp.register(new MyCommand());
    }

    public class MyCommand {

        @Command("hello")
        @Description("Sends a hello message")
        @CommandPermission(4)
        public void hello(FabricCommandActor actor) {
            actor.reply("Hello from Fabric mod!");
        }
    }
}

Kotlin

class MyMod : ModInitializer {

    override fun onInitialize() {
        val lamp = FabricLamp.builder(this).build()
        lamp.register(MyCommand())
    }

    inner class MyCommand {

        @Command("hello")
        @Description("Sends a hello message")
        @CommandPermission(4)
        fun hello(actor: FabricCommandActor) {
            actor.reply("Hello from Fabric mod!")
        }
    }
}