• 26.2
• 26.1.2
• 1.21.11
• 1.21.10
• 1.21.8
• 1.21.4
• 1.21.1
• 1.20.4

Fabric API DSL

Documentation for the Fabric API support in the Fabric Loom Gradle plugin.

WARNING

This page is written for version 1.21.10. Documentation for older versions may be incomplete.

Loom has a DSL to help configure certain aspects of Fabric API such as data generation and tests.

Data Generation

For a step-by-step guide on how to use data generation, see the Data Generation Setup page. The most basic data generation setup can be configured with the following code:

fabricApi {
 configureDataGeneration()
}

This will create a new run configuration that runs Fabric API with data generation enabled. A range of more advanced options can be configured as shown below:

fabricApi {
 configureDataGeneration {
  // Contains the output directory where generated data files will be stored.
  // Defaults to `src/main/generated`
  outputDirectory = file("src/generated/resources")

  // Contains a boolean indicating whether a run configuration should be created for the data generation process.
  // Defaults to `true`
  createRunConfiguration = true

  // Contains a boolean indicating whether a new source set should be created for the data generation process.
  // This is useful if you do not want your datagen code to be exported in your mod jar.
  // Defaults to `false`
  createSourceSet = true

  // Contains a string representing the mod ID associated with the data generation process. This must be set if `createSourceSet` is true.
  // This must be the mod id of the mod used for datagen in the datagen source set and not your main mod id.
  modId = "example-datagen"

  // Contains a boolean indicating whether strict validation is enabled.
  // Defaults to `false`
  strictValidation = true

  // Contains a boolean indicating whether the generated resources will be automatically added to the main source set.
  // Defaults to `true`
  addToResources = true

  // Contains a boolean indicating whether data generation will be compiled and run with the client.
  // Defaults to `false`
  client = true
 }
}

Tests

As with data generation, you can set up basic testing with the following:

fabricApi {
 configureTests()
}

This will create 2 new run configurations, one for the server side game tests and one for the client side game tests. A range of more advanced options can be configured as shown below:

fabricApi {
 configureTests {
  // Contains a boolean indicating whether a new source set should be created for the tests.
  // Defaults to `false`
  createSourceSet = true

  // Contains a string representing the mod ID associated with the tests. This must be set if `createSourceSet` is true.
  // This must be the mod id of the mod used for tests in the gametest source set and not your main mod id.
  modId = "example-tests"

  // Contains a boolean indicating whether a run configuration will be created for the server side game tests, using Vanilla Game Test framework.
  // Defaults to `true`
  enableGameTests = true

  // Contains a boolean indicating whether a run configuration will be created for the client side game tests, using the Fabric API Client Test framework.
  // Defaults to `true`
  enableClientGameTests = true

  // Contains a boolean indicating whether the eula has been accepted. By enabling this you agree to the Minecraft EULA located at https://aka.ms/MinecraftEULA.
  // Defaults to `false`
  eula = true

  // Contains a boolean indicating whether the run directories should be cleared before running the tests.
  // This only works when `enableClientGameTests` is `true`.
  // Defaults to `true`
  clearRunDirectory = true

  // Contains a string representing the username to use for the client side game tests.
  // Defaults to `Player0`
  username = "Username"
 }
}