hugo-theme-relearn/layouts/partials/menupermalink.gotmpl

{{- $url := "" }}
{{- with .menu }}
  {{- $errorlevel := or $.page.Params.link.errorlevel $.page.Site.Params.link.errorlevel }}
  {{- if .PageRef }}
    {{- with .Page }}
      {{- $url = partial "permalink.gotmpl" (dict "to" .) }}
    {{- else }}
      {{- if eq $errorlevel "warning" }}
        {{- warnf "%q: menu link '%s' is not a page but linked anyways" $.page.File.Filename .PageRef }}
      {{- else if eq $errorlevel "error" }}
        {{- errorf "%q: menu link '%s' is not a page" $.page.File.Filename .PageRef }}
      {{- end }}
    {{- end }}
  {{- else }}
    {{- with .URL }}
      {{- $url = . | relLangURL }}
      {{- $u := urls.Parse $url }}
      {{- if $u.IsAbs }}
        {{- partialCached "_relearn/urlExists.gotmpl" (dict "url" $url "page" $.page "type" "menu link") $u.String }}
      {{- else }}
        {{- if eq $errorlevel "warning" }}
          {{- warnf "%q: local menu link '%s' was given by 'URL'; if it points to a page inside your Hugo site use 'pageRef' instead; link created anyways" $.page.File.Filename . }}
        {{- else if eq $errorlevel "error" }}
          {{- errorf "%q: local menu link '%s' was given by 'URL'; if it points to a page inside your Hugo site use 'pageRef' instead" $.page.File.Filename . }}
        {{- end }}
      {{- end }}
    {{- end }}
  {{- end }}
{{- end }}
{{- return $url }}