{% macro commit_link(head, repo_url, status=none) -%}
<p class="preview-commit">Built from commit <a class="preview-commit-link" target="_blank"
    href="{{ repo_url ~ 'commit/' ~ head }}">{{ head }}</a>
  {% if status is not none %}
  {{ " (" ~ status ~ ")" }}
  {% endif %}
</p>
{% endmacro %}