custom_data_source: {
  name: "dir"
  base_data_source: "compileunits"

  rewrite: {
    pattern: "^(.*/tile/)(third_party/\\w+)"
    replacement: "\\2"
  }

  rewrite: {
    pattern: "^(.*/tile/)((\\w+/)+)"
    replacement: "\\2"
  }
}