{% macro options(pages, indent, selectedId, excludeId) %}
    {% for p in pages %}
        {% if p.id != excludeId %}
            <option value="{{ p.id }}" {% if selectedId and selectedId == p.id %}selected{% endif %}>{{ indent }}{% if indent %}└ {% endif %}{{ p.title }}</option>
            {{ _self.options(p.children, indent ~ '    ', selectedId, excludeId) }}
        {% endif %}
    {% endfor %}
{% endmacro %}