Sample: use Gradle custom plugin

build.gradle

apply plugin: 'eclipse'
apply plugin: 'maven'
apply plugin: 'greeting'

buildscript {
    repositories { mavenLocal() }
    dependencies { classpath 'com.example:greet:1.0-SNAPSHOT' }
}

task hi(type:com.example.GreetingTask){
    greeting = 'Hi'
}