/**
     * Gets the base directory of the current project (if any).
     *
     * @return The base directory of the current project or {@code null} if none.
     */
    File getProjectDirectory();

    /**
     * Gets current calculated project properties
     *
     * @return The project properties, never {@code null}.
     */
    Map<String, String> getProjectProperties();

        if (path == null) {
            return null;
        }

        RegexBasedInterpolator interpolator = new RegexBasedInterpolator();

        final File basedir = context.getProjectDirectory();

        if (basedir != null) {
            interpolator.addValueSource(new AbstractValueSource(false) {
                @Override
                public Object getValue(String expression) {

            task.into(extension.getDocumentationRenderedRoot());
        });

        extension.getSourceRoot().convention(layout.getProjectDirectory().dir("src/docs"));
        extension.getDocumentationRenderedRoot().convention(layout.getBuildDirectory().dir("docs"));
        extension.getStagingRoot().convention(layout.getBuildDirectory().dir("working"));

            task.getReleaseNotes().set(extension.getReleaseNotes().getMarkdownFile());
            task.getMilestone().convention(project.getProviders().fileContents(project.getIsolated().getRootProject().getProjectDirectory().file("version.txt")).getAsText().map(String::trim));
        });

        Configuration jquery = project.getConfigurations().create("jquery", conf -> {

        if (fromRepo) {
            // when model is read from repo, a stream is used, then pomFile == null
            // (has consequences in inheritance algorithm since getProjectDirectory() returns null)
            parent = parent.clone();
            parent.setPomFile(null);
            child = child.clone();
            child.setPomFile(null);
        }

        } else {
            this.userProperties = Collections.emptyMap();
        }

        return this;
    }

    @Override
    public File getProjectDirectory() {
        return projectDirectory;
    }

    /**
     * Sets the base directory of the current project.
     *