cupper-hugo-theme/layouts/partials/disqus.html

<div id="disqus-container">
  {{ $ctx := . }}
  {{ with .Site.DisqusShortname }}
    <button id="disqus-button" onclick="showComments()">Show comments</button>
    <div id="disqus-comments">
      {{ if eq . "yourdiscussshortname" }}
        <p>Disqus comments are disabled.</p>
      {{ else }}
        {{ template "_internal/disqus.html" $ctx }}
      {{ end }}
    </div>
  {{ end }}
</div>