Using groovy classes within Gradle build

build, gradle, groovy

Solution

You need to add the class to `buildSrc` if you want to reference it from the build (and not in a simple Exec task). Given this directory structure:

|-buildSrc
|    |- src
|        |- main
|            |- groovy
|                |- GroovyClass.groovy
|- build.gradle

Where `GroovyClass.groovy` is:

class GroovyClass {
    void foo() {
        println 'foo'
    }
}

And `build.gradle` is:

apply plugin: 'groovy'

dependencies {
    compile 'org.codehaus.groovy:groovy-all:2.2.1'
}

task fooTask << {
    GroovyClass g = new GroovyClass()
    g.foo()
}

Then, running `gradle fooTask` gives the output:

$ gradle fooTask
:buildSrc:compileJava UP-TO-DATE
:buildSrc:compileGroovy UP-TO-DATE
:buildSrc:processResources UP-TO-DATE
:buildSrc:classes UP-TO-DATE
:buildSrc:jar UP-TO-DATE
:buildSrc:assemble UP-TO-DATE
:buildSrc:compileTestJava UP-TO-DATE
:buildSrc:compileTestGroovy UP-TO-DATE
:buildSrc:processTestResources UP-TO-DATE
:buildSrc:testClasses UP-TO-DATE
:buildSrc:test UP-TO-DATE
:buildSrc:check UP-TO-DATE
:buildSrc:build UP-TO-DATE
:fooTask
foo

BUILD SUCCESSFUL

Total time: 4.604 secs

Problem

I'm trying to run a Groovy class from within my build.gradle file. I'm following the direction in the use guide however I get an error. The build file is: ``` apply plugin: 'java' apply plugin: 'groovy' main { java { srcDirs = ["$projectDir/src/java"] } groovy { srcDirs = ["$projectDir/src/groovy"] } } dependencies { compile 'org.codehaus.groovy:groovy-all:2.2.0', files(....) } task fooTask << { groovyClass groovyClass = new groovyClass() groovyClass.foo() } ``` The groovy class is very simple: ``` public class groovyClass { public void foo() { println 'foo' } } ``` However when I try to run gradlew compile fooTask I get the following error: unable to resolve class groovyClass Any idea why? Thanks

Original source