mkdocs-material/material/partials/source.html

{% set platform = config.extra.repo_icon or config.repo_url %}
{% if "github" in platform %}
  {% set repo_type = "github" %}
{% elif "gitlab" in platform %}
  {% set repo_type = "gitlab" %}
{% elif "bitbucket" in platform %}
  {% set repo_type = "bitbucket" %}
{% else %}
  {% set repo_type = "" %}
{% endif %}
<a href="{{ config.repo_url }}" title="Go to repository" class="md-source" data-md-source="{{ repo_type }}">
  {% if repo_type %}
    <svg class="md-source__icon">
      <use href="#{{ repo_type }}" x="12" y="12" width="24" height="24"></use>
    </svg>
  {% endif %}
  <div class="md-source__repository">
    {{ config.repo_name }}
  </div>
</a>