build.gradle

apply plugin: 'groovy'
apply plugin: 'java'
apply plugin: 'eclipse'
// need to include spark libs in jar
apply plugin: 'com.github.johnrengelman.shadow'

// set the dependencies for running the groovy script
buildscript {
    repositories {
        mavenCentral()
        jcenter()
    }
    dependencies {
        classpath 'org.codehaus.groovy:groovy-all:2.0.5'
        classpath 'org.apache.knox:gateway-shell:0.6.0'
        // uberjar
        classpath 'com.github.jengelman.gradle.plugins:shadow:1.2.2'
    }
}

// set the dependencies for compiling the groovy script and mapreduce classes
repositories {
    mavenCentral()
}

dependencies {
    compile 'org.codehaus.groovy:groovy-all:2.0.5'
    compile 'org.apache.knox:gateway-shell:0.6.0'
    // compile Spark class
    compile 'org.apache.spark:spark-core_2.10:1.4.1'
}

sourceCompatibility = 1.7
targetCompatibility = 1.7

// tell gradle the groovy script is in the same folder as the build.gradle file
sourceSets {
    main {
        groovy {
            srcDirs = ['.']
        }
    }
}

// task to run the groovy script
task('OozieMapReduce', dependsOn:'jar', type: JavaExec) {

    Properties props = new Properties()
    props.load(new FileInputStream("$projectDir/../../connection.properties"))

    environment 'gateway', props.gateway
    environment 'username', props.username
    environment 'password', props.password

    main = 'Example'
    classpath = sourceSets.main.runtimeClasspath
}

task('Example') {
    dependsOn OozieMapReduce
}