To use the GWT plugin, include in your build script:

apply plugin: 'gwt'

The plugin JAR needs to be defined in the classpath of your build script. It is directly available on BinTray. Alternatively, you can download it from GitHub and deploy it to your local repository. The following code snippet shows an example on how to retrieve it from Bintray:

buildscript {
    repositories {
        maven { url { 'http://dl.bintray.com/youribonnaffe/maven' } }
    }

    dependencies {
        classpath 'org.gradle.api.plugins:gradle-gwt-plugin:0.1-02112013'
    }
}

The GWT plugin defines the following tasks:

• compileGwt: Run GWT compiler
• gwtSources: Build sources JAR to be used in GWT module
• gwtDevMode: Run GWT compiler

The GWT plugin defines the following convention properties in the gwt closure:

• gwtModules: Specifies the name(s) of the module(s) to host (List of strings)
• gwtVersion: GWT version to use (Default to 2.5.1)

The configuration gwt is created for GWT dependencies (compile time only). You can eventually define them yourself, otherwise they will be automatically defined from gwtVersion.

The task compileGwt allows to run the GWT compiler. Define the tasks' properties in the closure compileGwt:

• buildDir: The directory into which deployable output files will be written (must be writeable; defaults to build/gwt/out)
• workDir: The compiler's working directory for internal use (must be writeable; defaults to build/gwt/work)
• genDir: The directory into which generated files, not intended for deployment, will be written (defaults to build/gwt/gen)
• extraDir: The directory into which extra files, not intended for deployment, will be written (defaults to build/gwt/extra)
• style: Script output style: OBF[USCATED], PRETTY, or DETAILED (defaults to OBF)
• disableClassMetadata: EXPERIMENTAL: Disables some java.lang.Class methods (e.g. getName())
• disableCastChecking: EXPERIMENTAL: Disables run-time checking of cast operations
• validateOnly: Validate all source code, but do not compile
• draftCompile: Enable faster, but less-optimized, compilations
• localWorkers: The number of local workers to use when compiling permutations
• modules: Specifies the name(s) of the module(s) to host (List of strings)

The task gwtDevMode allows to run your GWT application in development mode. Define the tasks' properties in the closure gwtDevMode:

• noserver: Prevents the embedded web server from running
• port: Specifies the TCP port for the embedded web server (defaults to 8888)
• whitelist: Allows the user to browse URLs that match the specified regexes (comma or space separated)
• blacklist: Prevents the user browsing URLs that match the specified regexes (comma or space separated)
• logdir: Logs to a file in the given directory, as well as graphically (File)
• bindAddress: Specifies the bind address for the code server and web server (defaults to 127.0.0.1)
• codeServerPort: Specifies the TCP port for the code server (defaults to 9997)
• startupUrls: Automatically launches the specified URLs (List of strings)
• warDir: The directory into which deployable output files will be written (defaults to 'src/main/webapp')
• workDir: The compiler's working directory for internal use (must be writeable; defaults to build/gwt/work)
• genDir: The directory into which generated files, not intended for deployment, will be written (defaults to build/gwt/gen)
• extraDir: The directory into which extra files, not intended for deployment, will be written (defaults to build/gwt/extra)
• modules: Specifies the name(s) of the module(s) to host (List of strings)

gwt {
    gwtModules << 'com.acme.MyModule'
}

gwt {
    gwtVersion = '2.5.1' // default value, will add GWT dependencies (user, dev, servlet, validation)
    // to define the dependencies yourself use gwt scope in dependencies

    modules << 'com.acme.AnotherModule'
    modules = ['com.acme.MyModule', 'com.acme.AnotherModule']

}

compileGwt {
    style = 'DETAILED'
    compileReport = true
    jvmArgs =   [ '-Xmx512M', '-Xss1024k'] // JVM Options from JavaExec are supported
}

Based on https://github.com/desource/gradle-gwt-plugin and inspired by GWT Maven plugin

Readme format from https://github.com/bmuschko/gradle-gae-plugin

Travis CI: