Xtend Compiler

A Gradle plugin for compiling Xtend source code.

Getting Started

Apply the latest org.xtext.xtend plugin. Then add the Xtend library.

plugins {
  id "org.xtext.xtend" version "4.0.0"
}

repositories.mavenCentral()

dependencies {
  compile 'org.eclipse.xtend:org.eclipse.xtend.lib:2.30.0'
}

Features

Incrementally compiles Xtend sources to Java
Enhances Java classes with Xtend debug information
Integrates seamlessly with the Xtext Builder plugin and other Xtext languages
Hooks into ‘gradle eclipse’, so the Xtend compiler is configured for your project when you import it into Eclipse
Supports Gradle 7.1 and above (tested up to 8.0)
Supports Xtend 2.17 and above (tested up to 29.0)

Options

The Xtend plugin comes with good default settings that will suit most projets. But you can customize every aspect:

xtend {
  generator {
    //whether to generate @SuppressWarnings("all"), enabled by default
    suppressWarningsAnnotation = false
    //whether to generate the @Generated annotation, disabled by default
    generatedAnnotation {
      active = true
      comment = "Copyright My Cool Company"
      includeDate = true
    }
  }
  debugger {
    //how to install debug info into generated Java code
    //SMAP adds Xtend debug info on top of Java
    //PRIMARY makes Xtend the only debug info (throws away Java line numbers)
    //default is SMAP
    sourceInstaller = 'SMAP' //or 'PRIMARY' or 'NONE'
    //whether to hide synthetic variables in the debugger
    hideSyntheticVariables = true
  }
  validator {
    //adjust severity of issues
    //available levels are error, warning, info and ignore
    error 'org.eclipse.xtend.core.validation.IssueCodes.unused_private_member'
    // These issue IDs can be found in your Eclipse project's .settings/org.eclipse.xtend.core.Xtend.prefs
    // after enabling Project > Properties > Xtend > Errors/Warnings: [X] Enable project specific settings
  }
}

The output folder can be configured for each sourceSet. By default it will be build/xtend/<sourceSet.name>.

sourceSets {
  main.xtend.outputDir = 'xtend-gen'
  test.xtend.outputDir = 'test/xtend-gen'
}