run groovy in gradle

run_groovy.gradle

//You can create src/main/groovy, put your script called 'myscript.groovy' in there:
apply plugin: 'groovy'
apply plugin: 'java'
apply plugin: 'application'

configurations {
    excludeFromJar
    compile.extendsFrom excludeFromJar
}

repositories {
    mavenCentral()
}

dependencies {
    excludeFromJar 'donotincludeinjar'
    compile 'org.codehaus.groovy:groovy-all:2.0.5'
}

task runScript (dependsOn: 'classes', type: JavaExec) {
    main = 'myscript'
    classpath = sourceSets.main.runtimeClasspath
}

task uberJar(dependsOn: 'classes', type:'Jar') {
    dependsOn configurations.runtime
    from files(sourceSets.main.output.classesDir)
    from {
        (configurations.runtime - configurations.excludeFromJar).collect {
            it.isDirectory() ? it : zipTree(it)
        }
    }
    mainfest {
        attributes 'Main-Class': 'MyMainClass'
    }
}