Reusing file sets in Gradle builds

example.groovy

def commonCrap = copySpec {
  from('dir1') {
    include '**/*.jar'
  }
  from('dir2') {
    include '**/*.dll'
  }
}

task copy1(type: Copy) {
  into "${buildDir}/copy1"
  with commonCrap
}
task copy2(type: Copy) {
  into "${buildDir}/copy2"
  with commonCrap
}
task zip3(type: Zip) {
  archiveFile = "${buildDir}/blah.zip"
  with commonCrap
}