Generate an XML site map using Jekyll.

jekyll-sitemap

---
layout:
permalink: /sitemap.xml
---
<?xml version="1.0" encoding="UTF-8"?>

<urlset
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd
    http://www.w3.org/1999/xhtml http://www.w3.org/2002/08/xhtml/xhtml1-strict.xsd"
    xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" 
    xmlns:xhtml="http://www.w3.org/1999/xhtml"
>
  {% for post in site.posts %}
    <url>
      <loc>{{ site.url }}{{ site.baseurl}}{{ post.url }}</loc>
      <xhtml:link rel="alternate" hreflang="en" href="{{ site.url }}{{ site.baseurl}}{{ post.url }}" />
      {% if post.last_modified_at %}
        <lastmod>{{ post.last_modified_at | date_to_xmlschema }}</lastmod>
      {% else %}
        <lastmod>{{ post.date | date_to_xmlschema }}</lastmod>
      {% endif %}
    </url>
  {% endfor %}

  {% for page in site.html_pages %}
    <url>
      <loc>{{ site.url }}{{ site.baseurl }}/{{ page.path }}</loc>
      <xhtml:link rel="alternate" hreflang="en" href="{{ site.url }}{{ site.baseurl }}/{{ page.path }}" />
    </url>
  {% endfor %}
</urlset>