given:
        def parentDir = temporaryFolder.createDir("parent")
        def childDir = parentDir.createDir("child")
        parentDir.createDir("sibling")
        childDir.file("file.txt").createFile()

        allowFileSystemAccess(true)
        def childSnapshot = read(childDir)

        when:
        def parentSnapshot = read(parentDir)

        def rootBuild = rootBuild(rootDir)
        registry.attachRootBuild(rootBuild)

        def parentDir = rootDir.file("parent").createDir()
        parentDir.file("buildSrc/build.gradle").createFile()

        def parentDefinition = build(parentDir, "parent")
        def parent = expectIncludedBuildAdded("parent", parentDefinition)

        registry.addIncludedBuild(parentDefinition)

                }
            }
        }
        for (File parentDir : parentsOfDeletedDistributions) {
            if (listFiles(parentDir).isEmpty()) {
                parentDir.delete();
            }
        }
    }

    private Multimap<GradleVersion, File> determineChecksumDirsByVersion() {

	// fstore guarantees an atomic write, we need durability too.
	parentDir, err := os.Open(dir)
	if err != nil {
		return err
	}

	if err = parentDir.Sync(); err != nil {
		// Ignore return here, there is already an error reported.
		parentDir.Close()
		return err
	}

	return parentDir.Close()
}

    }

    TestFile file(String filename) {
        def file = new TestFile(testProjectDir, filename)
        def parentDir = file.getParentFile()
        assert parentDir.isDirectory() || parentDir.mkdirs()

        file
    }

    SmokeTestGradleRunner runner(String... tasks) {
        def gradleRunner = GradleRunner.create()

	}

	// create target_dir before call to NodePublish
	parentDir := filepath.Dir(dir)
	if err := os.MkdirAll(parentDir, 0750); err != nil {
		return errors.New(log("mounter.SetUpAt failed to create dir %#v:  %v", parentDir, err))
	}
	klog.V(4).Info(log("created target path successfully [%s]", parentDir))

	nodePublishSecrets = map[string]string{}
	if secretRef != nil {

var overlyCautiousIllegalFileCharacters = regexp.MustCompile(`[^(\w/.)]`)

// computeDiscoverCacheDir takes the parentDir and the host and comes up with a "usually non-colliding" name.
func computeDiscoverCacheDir(parentDir, host string) string {
	// strip the optional scheme from host if its there:
	schemelessHost := strings.Replace(strings.Replace(host, "https://", "", 1), "http://", "", 1)

	// safe to do because the lock file ensures that their writers are no longer
	// active.
	parentDir := filepath.Dir(dir)
	tmpPrefix := filepath.Base(dir) + ".tmp-"
	if old, err := filepath.Glob(filepath.Join(str.QuoteGlob(parentDir), str.QuoteGlob(tmpPrefix)+"*")); err == nil {
		for _, path := range old {
			RemoveAll(path) // best effort
		}
	}
	if dirExists {

	if dir == "." {
		t.Skip("skipping; running test at root somehow")
	}
	parentDir := filepath.Dir(dir) // "/tmp/go-buildNNNN/os/exec"
	dirBase := filepath.Base(dir)  // "_test"
	if dirBase == "." {
		t.Skipf("skipping; unexpected shallow dir of %q", dir)
	}

	cmd.Path = filepath.Join(dirBase, base)
	cmd.Dir = parentDir

	out, err := cmd.Output()
	if err != nil {
		t.Errorf("echo: %v", err)
	}

            assert operation.id != null
            parent1Id = operation.id
            assert operation.parentId == null
        }
        1 * listener.start({ it.displayName == "<parent-2>" }, _) >> { BuildOperationDescriptor descriptor, BuildOperationState operation ->
            assert operation.id != null
            parent2Id = operation.id
            assert operation.parentId == null
        }