{{ $scratch := newScratch }}
{{ $productPathData := findRE "[^/]+.*?" .RelPermalink }}
{{ $product := index $productPathData 0 }}
{{ $currentVersion := index $productPathData 1 }}

{{ if or (eq $product nil) (lt (len (findRE `v[0-2]\.[0-9x]{1,2}` $currentVersion)) 1) }}
{{ else }}
<div class="dropdown">
  <p class="selected">{{ cond (in $currentVersion "v") $currentVersion (title $currentVersion) }}</p>
  <ul class="item-list versions">
    {{ if ne $product "flux" }}
      <li><a href="https://archive.docs.influxdata.com/{{ $product }}/" class="legacy" target="_blank">older</a></li>
    {{ end }}
    {{ range (index .Site.Data.products $product).versions }}
      {{ $scratch.Set "link" (print "/" $product "/" . "/") }}
      {{ $altVersionPage := $.GetPage ((replaceRE $currentVersion . $.Page.RelPermalink) | replaceRE `\/$` "") }}
      {{ if gt (len $altVersionPage.Title) 0 }}
        {{ $scratch.Set "link" $altVersionPage.RelPermalink }}
      {{ else if eq . $currentVersion }}
        {{ $scratch.Set "link" "" }}
      {{ end }}
      {{ $link := $scratch.Get "link" }}
      <li>
        <a href="{{ $link }}" {{ if eq . $currentVersion }}class="active"{{ end }}>{{ cond (in . "v") . (title .) }}</a>
      </li>
    {{ end }}
  </ul>
</div>
{{ end }}