first attempt at building gradle runner for bigtop tests

build.gradle

apply plugin: 'groovy'

repositories {
    mavenCentral()
}

dependencies {
    
    //needed to avoid groovy not on classpath error. 
    testCompile module('org.codehaus.groovy:groovy:1.8.0')
    testCompile group:'org.apache.bigtop.itest', name:'itest-common', version:'0.7.0',transitive:'true'
    testCompile group:'org.apache.hadoop',name:'hadoop-common', version:'2.0.6-alpha',transitive:'true'
    testCompile group:'org.apache.hadoop',name:'hadoop-hdfs', version:'2.1.0-beta',transitive:'true'
}


def tests_to_include(){
  return [ 
           "TestHadoopExamples.groovy"  
         ]
}


/**
* This is a function which includes directories from source sets,
* but filters out any groovy tests which don't match those in the
* defined list of tests we want to run. 
*
* For users:  Add new groovy script names to the array list below
* in order to include them.
*/
def doExclude(filename) {
    print("Exclude? ${filename} ... ")
    def keep_this_test=false; 
    tests_to_include().each() { 
      if(filename.contains(".groovy")){
        if(filename.contains(it))
           keep_this_test=true 
        else
           keep_this_test=false
      }
      else 
        keep_this_test=true;
    };

    println("Keep = ${keep_this_test} "+filename);
    
    return !keep_this_test ;
}

sourceSets {
 test {
        /**
        * This will put the input files into the jar. 
        * TODO: We should refactor tests, over time, not to require running from jar.
        */
  
        resources { 
              srcDirs = 
              [
               //'/opt/bigtop/bigtop-tests/test-artifacts/hadoop/src/main/resources/',
               //In here, we put the log4j.properties, so we have fine grained logging control.
               'conf/']
        }
        
        groovy {       
          srcDirs = ['/opt/bigtop/bigtop-tests/test-artifacts/hadoop/']
          exclude 'src/main/groovy/org/apache/bigtop/itest/hadoop/hdfs/**'
          //exclude 'src/main/groovy/org/apache/bigtop/itest/hadoop/hcfs/**'
          //exclude 'src/main/groovy/org/apache/bigtop/itest/hadoop/yarn/**'
          exclude { FileTreeElement elem -> ( doExclude(elem.getName()) ) }
       }
 }
}

println "SOURCES="
println sourceSets.main.allSource.files
println sourceSets.test.allSource.files


test.doFirst {
    
    
    def vars = [
       "BIGTOP_HOME", // for copying input files / resources
       "HADOOP_MAPRED_HOME" // required for mapreduce programs to run
    ];
    
    vars.each() {
        def value = System.getenv("${it}")
        if(value == null || value == "null")
            throw new GradleException("undeclared env variable: ${it}")
        else 
            println("${it} = $value");
    }

}