submit spark-job to livy as gradle task

build.gradle

task submitLivy(type: Exec, dependsOn: shadowJar ) {

    def targetUrl = 'http://localhost:8998/batches'
    def sparkOption = file("livy.json").getText("utf-8")
    def curlComm = ['curl', '-X', 'POST', '-H', 'Content-Type: application/json', targetUrl, '-d',  sparkOption]

    doLast {
        ProcessBuilder builder = new ProcessBuilder(curlComm)
        println builder.command()
        Process process = builder.start()
        process.waitFor()
        println process.err.text
        println process.text
        process.destroy()
    }

} 

livy.json

{
  "conf": {
    "spark.master": "yarn-cluster",
    "spark.driver.extraJavaOptions": "-DENV=dev",
    "spark.driver.extraClassPath": "/home/ebong2/Downloads/spark-1.6.2-bin-hadoop2.6/conf/"
  },
  "file": "file:///home/ebong2/workspace/spark-modules/jobs/awesome-job/build/libs/awesome-job-1.0.0-all.jar",
  "className": "org.ebong2.awesome.Application",
  "name": "awesome-",
  "executorCores": 1,
  "executorMemory": "1g",
  "driverMemory": "1g",
  "queue": "default",
  "jars": [
    "file:///home/ebong2/Downloads/spark-1.6.2-bin-hadoop2.6/lib/datanucleus-api-jdo-3.2.6.jar",
    "file:///home/ebong2/Downloads/spark-1.6.2-bin-hadoop2.6/lib/datanucleus-core-3.2.10",
    "file:///home/ebong2/Downloads/spark-1.6.2-bin-hadoop2.6/lib/datanucleus-rdbms-3.2.9"
  ]
}