gradle recipe for OSGi uberjar

build.gradle

apply plugin: 'java'
apply plugin: 'osgi'

configurations {
    uberJar
}

repositories {
    mavenCentral()
    mavenRepo url: 'http://scala-tools.org/repo-releases'
}

dependencies {
    runtime 'org.scala-lang:scala-library:2.9.1'
    testCompile 'junit:junit:4.10'

    //add all the configurations/modules you want to include in the uberJar
    uberJar configurations.runtime
    uberJar configurations.testCompile {
        //exclude transitive dependencies
        exclude group:'org.hamcrest', artifact:'hamcrest-core', version:'1.1'
    }
}

jar {
    classifier = 'osgi'

    configurations.uberJar.each { from zipTree(it) }
    //generic file excludes when filling jar
    exclude 'META-INF/**', 'LICENSE.txt'

    manifest {
        name = 'foo-osgi'
        attributes 'Manifest-Version':'1.0', 'Created-By':'saager.mhatre@gmail.com'
        instruction 'Bundle-Vendor', 'MyCompany'
    }

    doLast {
        ant.signjar(jar: archivePath, keystore: './foo.jks', storepass: 'foobar', alias: 'osgi-key')
    }
}

Some help from the guys in http://markmail.org/thread/bigprn52qon4dl7n