How can I add a generated Source Folder to my Source Path in Gradle?

Question

I use annotation processing. Therefore I use the apt plugin. It generates new java sources in build/source/apt.

Here is my build.gradle:

apply plugin: 'java' apply plugin: 'eclipse' apply plugin: 'apt' apply plugin: 'war' apply plugin: 'gwt' apply plugin: 'jetty'  sourceCompatibility = 1.7 version = '1.0'  eclipse {     classpath {        downloadSources=true        downloadJavadoc=true     } }  buildscript {     repositories {         mavenCentral()         jcenter()         maven {             url "https://oss.sonatype.org/content/repositories/snapshots/"         }     }     dependencies {         classpath 'de.richsource.gradle.plugins:gwt-gradle-plugin:0.6'               classpath 'com.jimdo.gradle:gradle-apt-plugin:0.5-SNAPSHOT'     } }  repositories {     mavenCentral()     maven {         name = "sonatype"         url = "https://oss.sonatype.org/content/repositories/snapshots/"     } }  dependencies {     apt 'com.google.dagger:dagger-compiler:2.0-SNAPSHOT:jar-with-dependencies'      compile 'com.google.guava:guava:18.0'     compile 'com.google.guava:guava-gwt:18.0'     compile 'javax.inject:javax.inject:1'        compile 'com.google.dagger:dagger:2.0-SNAPSHOT' }  gwt {     gwtVersion='2.7.0'     logLevel = 'INFO'     minHeapSize = "512M";     maxHeapSize = "1024M";       compiler {         strict = true;     }     modules 'test.GWTT'      }  tasks.withType(de.richsource.gradle.plugins.gwt.AbstractGwtActionTask) {     args '-XjsInteropMode', 'JS' } 

I need this sources to be available in my project such that eclipse can find them and such that they are included while compiling the project how can I do that?

Edit: Using

sourceSets {     apt{         java{             srcDir 'build/source/apt'         }     } } 

Leads to the following errors when running gradle build:

Compiling module test.GWTT    Tracing compile failure path for type 'test.client.GWTT'       [ERROR] Errors in 'file:/Users/mg/Documents/Grails/GGTS3.6.2/TestGradle2/src/main/java/test/client/GWTT.java'          [ERROR] Line 17: No source code is available for type test.client.test2.Dagger_MyWidgetGinjector; did you forget to inherit a required module?    Finding entry point classes       Tracing compile failure path for type 'test.client.GWTT'          [ERROR] Errors in 'file:/Users/mg/Documents/Grails/GGTS3.6.2/TestGradle2/src/main/java/test/client/GWTT.java'             [ERROR] Line 17: No source code is available for type test.client.test2.Dagger_MyWidgetGinjector; did you forget to inherit a required module?       [ERROR] Hint: Check the inheritance chain from your module; it may not be inheriting a required module or a module may not be adding its source path entries properly :compileGwt FAILED 

Using the former Eclipse finds the sources of the generated files but build does not.

Answer 1

sourceSets.main.java.srcDirs = ['build/generated-sources/xjc','src/main/java'] worked for me.