build.gradle

apply plugin:'application'

def mainClassName = "ensemble.EnsembleApp"

def FileCollection apachecp = files(
   "./lib/lucene-grouping-3.2.0.jar",
   "./lib/lucene-core-3.2.0.jar") 

sourceSets {
    main {
        java {
            srcDirs 'src/app/java',  
                    'src/generated/java', 
                    'src/samples/java'
        }
        resources {
            srcDirs 'src/app/resources', 
                    'src/generated/resources', 
                    'src/samples/resources'
        }
        compileClasspath += apachecp
    }
}

jar {
    manifest.attributes("Main-Class": mainClassName)

    // add in the sample sources....
    from fileTree('src/samples/java')

    // Note: this would be the "gradle" way to add in the Lucene jars
    // BUT we run into total path length on Windows with the temp file in ./build
    //apachecp.each { from zipTree(it) } 
    //exclude 'META-INF/*'
}

// Merge the Apache Lucene jars into our master jar.
jar.doLast() {
    ant.zip(destfile: jar.archivePath, update: true, duplicate: "preserve") {
        zipgroupfileset(dir: new File("./lib"), includes:"*.jar")
    }
}