kubenix/docs/layouts/shortcodes/source.html

{{- $file := .Get 0 -}}
<div class="source">
    <pre class="filename">
    <a href="{{ $.Site.Params.BookRepo}}/tree/main/docs/content/{{ .Page.File.Dir }}/{{ $file }}">
        {{- $file -}}
    </a>
    </pre>
  {{- $file := path.Join .Page.File.Dir $file -}}
  {{- highlight ($file | readFile | safeHTML) (path.Ext $file) -}}
</div>