hugo-theme-hilfe/layouts/partials/menu-filetree.html

{{ $current := . }}
{{ template "tree-nav" dict "sect" .Site.Home.Sections "current" $current }}

<!-- templates -->
{{ define "tree-nav" }}
    {{ $current := .current }}

    <ul class="gdoc-nav__list">
        {{ range .sect.GroupBy "Weight" }}
            {{ range .ByTitle }}
            {{ if not .Params.geekdocHidden }}
            <li>
            {{ if or .Content .Params.geekdocFlatSection }}
                <span class="flex">
                    <a href="{{ .RelPermalink }}" class="gdoc-nav__entry {{ if eq $current . }}is-active{{ end }}">
                        {{ partial "title" . }}
                    </a>
                </span>
            {{ else }}
                <span class="flex">{{ partial "title" . }}</span>
            {{ end }}

            {{ $numberOfPages := (add (len .Pages) (len .Sections)) }}
            {{ if and (ne $numberOfPages 0) (not .Params.geekdocFlatSection) }}
                {{ template "tree-nav" dict "sect" .Pages "current" $current}}
            {{ end }}
            </li>
            {{ end }}
            {{ end }}
        {{ end }}
    </ul>
{{ end }}