hacks-guide-minimal-mistakes-theme/_includes/comments-providers/scripts.html

{% if site.comments.provider and page.comments %}
  {% case site.comments.provider %}
    {% when "disqus" %}
      {% include /comments-providers/disqus.html %}
    {% when "discourse" %}
      {% include /comments-providers/discourse.html %}
    {% when "facebook" %}
      {% include /comments-providers/facebook.html %}
    {% when "google-plus" %}
      {% include /comments-providers/google-plus.html %}
    {% when "staticman" %}
      {% include /comments-providers/staticman.html %}
    {% when "custom" %}
      {% include /comments-providers/custom.html %}
  {% endcase %}
{% endif %}