{{- $currentPage := .Page -}}
{{- $u := urls.Parse .Destination -}}
{{- if not $u.Scheme -}}
  {{- with site.GetPage .Destination -}}
    {{- $backlinks := .Store.Get "backlinks" | default slice -}}
    {{- $backlinks := $backlinks|append $currentPage.RelPermalink -}}
    {{- .Store.Set "backlinks" ($backlinks|uniq) -}}
  {{- end -}}
{{- end -}}
<a href="{{ .Destination | safeURL }}"
  {{- with .Title }} title="{{ . }}"{{ end -}}
  {{- if $u.IsAbs }} rel="external"{{ end -}}
>
  {{- with .Text }}{{ . }}{{ end -}}
</a>
{{- /* chomp trailing newline */ -}}