private
fun parameterNamesFrom(gradleApiJars: Collection<File>): List<Properties> =
    gradleApiJars.mapNotNull { gradleApiJar ->
        JarFile(gradleApiJar).use { jar ->
            jar.loadPropertiesOrNull(parameterNamesResourceNameFor(gradleApiJar))
        }
    }


private
fun JarFile.loadPropertiesOrNull(name: String): Properties? =
    getJarEntry(name)?.let { entry ->
        getInputStream(entry)?.use { input ->

        given:
        createJarWithMarkerFile(jarFile)
        def clazz = loadClassForJar()

        expect:
        GradleRuntimeShadedJarDetector.isLoadedFrom(clazz)
    }

    def "cannot find marker file in standard JAR file"() {
        given:
        createJarWithoutMarkerFile(jarFile)
        def clazz = loadClassForJar()

        expect:

    @Override
    public void jar(File jarFile, Action action) {
        try {
            buildJar(jarFile, action);
        } catch (Exception e) {
            throw new GradleException(String.format("Failed to create Jar file %s.", jarFile), e);
        }
    }

    private static void buildJar(File jarFile, Action action) throws IOException {
        Files.createDirectories(jarFile.getParentFile().toPath());

        new JarRelocator(primaryInput.get().asFile, output, relocations).run()
    }
// end::artifact-transform-relocate[]

    private Set<String> readPackages(File file)  {
        return new JarFile(file).withCloseable { jarFile ->
            return jarFile.stream()
                .filter(Predicate.not { it.directory })
                .filter { it.name.endsWith(".class") }
                .map { entry ->

        then:
        def outputDir = temporaryFolder.testDirectory.file(outputDirPath)
        def jarFiles = outputDir.listFiles()
        jarFiles.size() == 2
        def gradleApiJar = jarFiles.find { it.name.startsWith('gradle-api-') }
        def testKitJar = jarFiles.find { it.name.startsWith('gradle-test-kit-') }

    /**
     * Jarファイル形式のファイルに含まれるリソースをトラバースします。
     *
     * @param jarFile
     *            jarファイル形式のファイル。{@literal null}であってはいけません
     * @param handler
     *            リソースを処理するハンドラ。{@literal null}であってはいけません
     */
    public static void forEach(final JarFile jarFile, final ResourceHandler handler) {
        assertArgumentNotNull("jarFile", jarFile);
        assertArgumentNotNull("handler", handler);

     * </p>
     *
     * @param jarFile
     *            Jarファイル。{@literal null}であってはいけません
     * @param handler
     *            クラスを処理するハンドラ。{@literal null}であってはいけません
     */
    public static void forEach(final JarFile jarFile, final ClassHandler handler) {
        assertArgumentNotNull("jarFile", jarFile);
        assertArgumentNotNull("handler", handler);

     *     }
     *
     * </pre>
     * @param jarFile the jar file to create
     * @param closure the configuration of the JAR file
     * @return the path to the created JAR file.
     */
    static File jar(File jarFile, @DelegatesTo(value = JarBuilder, strategy = Closure.DELEGATE_FIRST) Closure<?> closure) {
        try (def out = jarFile.newOutputStream(); def jarOut = new JarOutputStream(out)) {

        then: "Version 1.1 is used"
        file('libs').assertHasDescendants('projectA-1.1.jar', 'projectB-1.1.jar')
        file('libs/projectA-1.1.jar').assertIsCopyOf(projectA1.jarFile)
        file('libs/projectB-1.1.jar').assertIsCopyOf(projectB1.jarFile)

        when: "New versions are published"
        server.resetExpectations()
        def projectA2 = ivySftpRepo.module("group", "projectA", "1.2")
        projectA2.publish()

        }
    }

    def "files are requested once only when dependency is resolved"() {
        buildFile << '''
            def jarFile = file("jar-1.jar")
            jarFile << 'content'
            def libFiles = {
                println "FILES REQUESTED"
                [jarFile]
            }

            configurations { compile }
            dependencies {
                compile files(libFiles)