projectRegistry.getAllProjects() >> Collections.singleton(projectDescriptor)
        projectDescriptor.getProjectDir() >> buildLayout.settingsDir
        projectDescriptor.getBuildFile() >> new File(buildLayout.settingsDir, "build.gradle")
        gradle.getStartParameter() >> startParameter
        gradle.getServices() >> services
        gradle.getIdentityPath() >> Path.ROOT

            subProjects << p;
            ConfigureUtil.configure(configClosure, p);
        }

        File getBuildFile() {
            def buildFile = projectDir.file("build.gradle")
            if (!buildFile.exists()) {
                buildFile.createFile()
            }
            return buildFile
        }
    }

        StartParameter startParameter = action.getStartParameter();
        @SuppressWarnings("deprecation")
        File customBuildFile = DeprecationLogger.whileDisabled(startParameter::getBuildFile);
        if (customBuildFile != null) {
            validateIsFileAndExists(customBuildFile, "build file");
        }
        if (startParameter.getProjectDir() != null) {

            Actions.doNothing(),
            publicBuildPath,
            true
        );
        @SuppressWarnings("deprecation")
        File customBuildFile = DeprecationLogger.whileDisabled(buildSrcStartParameter::getBuildFile);
        assert customBuildFile == null;
        return buildDefinition;
    }

    private static StartParameterInternal buildSrcStartParameterFor(File buildSrcDir, StartParameter containingBuildParameters) {

            .setProjectDirectory(project.getProjectDir())
            .setBuildTreePath(projectIdentityPath)
            .setChildren(children);

        gradleProject.getBuildScript().setSourceFile(project.getBuildFile());

        for (DefaultGradleProject child : children) {
            child.setParent(gradleProject);
        }

        if (realizeTasks) {

     */
    void setBuildFileName(String name);

    /**
     * Returns the build file for this project.
     *
     * @return The build file. Never returns null.
     */
    File getBuildFile();

    /**
     * Returns the parent of this project, if any. Returns null if this project is the root project.
     *
     * @return The parent, or null if this is the root project.
     */
    @Nullable

            return build.buildDir.createDir(projectDirRelativePath)
        }

        String getProjectDirRelativePath() {
            return path.replaceAll(':', '/')
        }

        TestFile getBuildFile() {
            return projectDir.file('build.gradle')
        }

        void writeFiles() {
            projectDir.file('build.gradle') << """

        return buildFile().getName();
    }

    @Override
    public void setBuildFileName(String name) {
        this.buildFileName = name;
    }

    @Override
    public File getBuildFile() {
        return FileUtils.normalize(buildFile());
    }

    private File buildFile() {
        if (buildFileName != null) {
            return new File(getProjectDir(), buildFileName);
        }

    String packageName = "org.gradle.test"

    final Map<String, String> pluginIds = [:]

    PluginBuilder(TestFile projectDir) {
        this.projectDir = projectDir
    }

    TestFile getBuildFile() {
        file("build.gradle")
    }

    TestFile file(String path) {
        projectDir.file(path)
    }

    TestFile groovy(String path) {
        file("src/main/groovy/${sourceFilePath(path)}")