_docs/_includes/toc.html

<div class="toc">
{% assign path =  page.path | remove: "/index.adoc" | remove_first: "_" | remove_first:  page.collection | remove_first: "/"  %}

{% assign current_guide = path | split: "/" | first %}
{% assign section = path | remove: current_guide | remove : "/" %}


{% if current_guide != nil %}

    {% assign current_guide_url = current_guide | prepend: "/" %} 


    {% assign guide = site.data.toc | where: "url", current_guide_url | first %} 


    {% if section != "" %}
       {% assign section_url = "/" | append: current_guide | append: "/" | append: section %}
       {% assign sect = guide.items | where: "url", section_url | first %}

       {% include section-toc.html section=sect title=false %}   
    {% else %}
        <ul>
            {% for sect in guide.items %}
               <li>
                   {% include section-toc.html section=sect title=true%}   
               </li>
            {% endfor %}
        </ul> 
    {% endif %}
{% else %}  
    {% for guide in site.data.toc %}

        <h2> 
<a href="{{site.attrs.base_url}}{{guide.url}}" class=''>{{guide.title}}</a> </h2>
        {% if guide.items %}
        <ul>
          {% for sect in guide.items %}
              <li>
                  {% include section-toc.html section=sect title=true%}   
              </li>
          {% endfor %}
        </ul>
        {% endif %}
    {% endfor %}
{% endif %}
</div>