task.getDocumentationRoot().convention(extension.getUserManual().getRoot());
            task.getDestinationDirectory().convention(layout.getBuildDirectory().dir("tmp/" + task.getName()));
        });

        TaskProvider<Sync> userguideFlattenSources = tasks.register("stageUserguideSource", Sync.class, task -> {
            task.setDuplicatesStrategy(DuplicatesStrategy.FAIL);

        String quotedRootProjectDir = quote(rootProjectDir);
        String perfTestClasspathPattern = "(?:-cp.+\\\\build\\\\tmp\\\\performance-test-files.+?" + GRADLE_MAIN_CLASS_PATTERN_STR + ")";
        String buildDirClasspathPattern = "(?:-(classpath|cp) \"?" + quotedRootProjectDir + ".+?" + GRADLE_MAIN_CLASS_PATTERN_STR + ")";