<!-- Nested / Iteration / Recursion -->
{{- $.Scratch.Delete "sections" -}}
{{- $.Scratch.Delete "pages" -}}
{{- $contentDir := $.Site.Params.contentDir -}}
{{- template "treeSections" (dict "$" $ "path" (cond $.Site.IsMultiLingual (printf `./%s` $contentDir) (printf `./content`))) -}}

{{- define "treeSections" -}}
    {{- $ := index . "$" -}}
    {{- $path := .path -}}
    {{- range (readDir $path) -}}
        {{- $fileName := .Name -}}
        {{- if .IsDir -}}
            {{- $pagePath := (cond $.Site.IsMultiLingual (strings.TrimPrefix (printf `./%s` $.Site.Params.contentDir) (printf `%s/%s` $path $fileName)) (strings.TrimPrefix "./content" (printf `%s/%s` $path $fileName))) -}}
            {{- with $.Site.GetPage $pagePath -}}
                {{- if and (eq .Kind "section") (in $.Site.Params.mainSections .Section) -}}
                    {{- $.Scratch.Add "sections" (slice $fileName) -}}
                    {{- $.Scratch.Add "pages" (slice $pagePath) -}}
                {{- end -}}
            {{- end -}}
            {{- template "treeSections" (dict "$" $ "path" (printf `%s/%s` $path $fileName)) -}}
        {{- end -}}
    {{- end -}}
{{- end -}}