build.gradle

apply plugin: 'war'
apply plugin: 'java'
apply plugin: 'gwt'
apply plugin: 'jetty'
apply plugin: 'eclipse'

sourceCompatibility = 1.8
targetCompatibility = 1.8
version = '1.0'

buildscript {
    repositories {
        jcenter() //repository where to fetch gwt gradle plugin
    }
    dependencies {
        classpath 'de.richsource.gradle.plugins:gwt-gradle-plugin:0.6'
    }
}

dependencies {
    compile 'com.google.gwt:gwt-user:2.8.0-SNAPSHOT'
}

repositories {
    jcenter()
    maven { url 'https://oss.sonatype.org/content/repositories/google-snapshots' }
}

compileJava{
    options.incremental = true
}

gwt {
    gwtVersion = '2.8.0-SNAPSHOT'
    logLevel = 'ERROR'
    minHeapSize = "256M";
    maxHeapSize = "1024M";
    // specify your main module
    modules 'joelhandwell.HelloWorld'

    sourceSets {
        main {
            java {
                srcDir 'src/main/java'
            }
        }
    }

    superDev {
        noPrecompile = true
    }

    // specify the deployment port
    jettyRunWar.httpPort = 8089
}

task jettyDraftWar(type: JettyRunWar) {
    dependsOn draftWar
    dependsOn.remove('war')
    webApp=draftWar.archivePath
}