Groovyスクリプトを配布する1つの方法 ref: http://qiita.com/toby55kij/items/1172db965158dc7d1d2e

build.gradle

apply plugin: 'groovy'
apply plugin: 'application'

repositories {
    mavenCentral()
}

dependencies {
    compile 'org.codehaus.groovy:groovy-all:2.4.0'
}

mainClassName = "Hello"

Hello.groovy

println "Hello ${args.join(',')}."