listener.visitArtifacts(new EndCollection(this));
            return;
        }

        FileCollectionInternal fileCollection = dependencyMetadata.getFiles();
        Set<File> files;
        try {
            files = fileCollection.getFiles();
        } catch (Exception throwable) {
            listener.visitArtifacts(new BrokenArtifacts(throwable));
            return;
        }

        FileTree scriptPluginFiles = pluginSourceSet.getAllSource().matching(PrecompiledGroovyScript::filterPluginFiles);

        List<PrecompiledGroovyScript> scriptPlugins = scriptPluginFiles.getFiles().stream()
            .map(file -> new PrecompiledGroovyScript(file, getTextFileResourceLoader()))
            .peek(scriptPlugin -> validateScriptPlugin(project, scriptPlugin))
            .collect(Collectors.toList());

    SourceElement getGreeter() {
        return app.greeter
    }

    SourceElement getLogger() {
        return app.logger
    }

    @Override
    List<SourceFile> getFiles() {
        return Lists.newArrayList(Iterables.concat(super.getFiles(), app.greeter.files, app.logger.files, sum.files, multiply.files))
    }

        when:
        Set<File> files = collection.getFiles()

        then:
        collection.toString() == 'test files'
        files == [tmpDir.file('abc')] as Set
    }

    def 'resolving collection source #description can return null'() {
        def collection = factory.resolving('test files', input)

        when:
        Set<File> files = collection.getFiles()

        then:
        files.isEmpty()

                Path outputDir

                @TaskAction
                def go() {
                    outputFile.toFile().text = inputFile.toFile().text
                    inputDir.toFile().listFiles().each { f -> outputDir.resolve(f.name).toFile().text = f.text }
                }
            }

            task transform(type: TransformTask) {
                inputFile = file("file1.txt").toPath()

		t.Skip("skipping in short mode")
	}

	testenv.MustHaveGoBuild(t)

	// Collect non-test files.
	dirFiles := make(map[string][]string)
	root := filepath.Join(testenv.GOROOT(t), "src")
	walkPkgDirs(root, func(dir string, filenames []string) {
		dirFiles[dir] = filenames
	}, t.Error)

	c := &stdlibChecker{
		dirFiles: dirFiles,
		pkgs:     make(map[string]*futurePackage),
	}

	start := time.Now()

        left.visitDependencies(context);
    }

    @Override
    protected Set<File> getIntrinsicFiles() {
        Set<File> files = new LinkedHashSet<File>(left.getFiles());
        files.removeAll(right.getFiles());
        return files;
    }

    @Override
    public boolean contains(File file) {
        return left.contains(file) && !right.contains(file);
    }

            }
        }

        // Wait for all asynchronous work submitted to this queue to complete before continuing
        workQueue.await()
        logger.lifecycle("Created ${outputDir.get().asFile.listFiles().size} reversed files in ${outputDir.get().asFile.toRelativeString(projectLayout.projectDirectory.asFile)}")
        // end::wait-for-completion[]
    }
}

tasks.register<ReverseFiles>("reverseFiles") {

    @TaskAction
    fun run() {
        val bundleFile = projectLayout.buildDirectory.file("bundle.js").get().asFile
        val scriptsFiles = projectLayout.projectDirectory.dir("scripts").asFile.listFiles()

        bundleFile.outputStream().use { stream ->
            scriptsFiles.sorted().forEach {
                stream.write(it.readBytes())
            }
        }
    }
}

// tag::bundle-task[]

    }

    @Override
    protected String getConfiguredModule() {
        return "idea.module"
    }

    @Override
    protected String projectName(String path) {
        File iml = file(path).listFiles().find { it.name.endsWith("iml") }
        assert iml != null
        return iml.name - ".iml"
    }

    @Override
    String[] getGenerationTaskNames(String projectPath) {
        def taskNames = []