build.gradle

task uberJar(type: Jar) {
    manifest {
        attributes 'Main-Class': 'main.RunTest'
    }
    dependsOn configurations.runtimeClasspath
    from sourceSets.main.output
    from sourceSets.test.output
    from sourceSets.main.resources
    from sourceSets.test.resources
    from {
        configurations.runtimeClasspath.findAll { it.name.endsWith('jar') }.collect { zipTree(it) }
    }
    from {
        project(':someothermoudule').sourceSets.main.resources // If current project depends on some other modules
        project(':someothermoudule').sourceSets.test.resources // If current project depends on some other modules
    }
    exclude 'META-INF/*.RSA'
    exclude 'META-INF/*.SF'
    exclude 'META-INF/*.DSA'
}