site/docs/layouts/partials/parents.html

<div class="parents">
 <ul>
    {{- $currentNode := . }}
    {{- template "parent-loop" dict "currentnode" $currentNode }}

</ul>
</div>

{{- define "parent-loop" }}
{{- $currentNode := .currentnode }}
{{- $currentParent := $currentNode.Parent }}
    {{- if ne .Site.Home $currentParent}}
        <li {{ if eq $currentParent.Parent .Site.Home }} style="list-style-type:none;" {{ end }}>
            <a href="{{ $currentParent.RelPermalink }}">{{ $currentParent.Title }}</a>
        </li>
        {{- $currentNode = $currentParent }}
        {{- template "parent-loop" dict "currentnode" $currentNode }}
    {{ end }}
{{- end }}