{%- assign feed_page = site.pages | where: 'url', '/feed.xml' | first -%}
{%- if feed_page -%}
<link rel="alternate" type="application/rss+xml" href="{{ feed_page.url | relative_url | escape }}" title="{{ site.title | escape }}">
{% endif -%}

{%- assign page_title = page.title -%}
{%- if page_title == nil and page.date -%}
    {%- comment -%}
    Deal with jekyll-archives refusing to add, or facilitate addition of, a title to archive pages.
    {%- endcomment -%}
    {%- if page.type == "year" -%}
        {%- assign page_title = page.date | date: '%Y' -%}
    {%- elsif page.type == "month" -%}
        {%- assign page_title = page.date | date: '%B %Y' -%}
    {%- endif -%}
{%- endif -%}

<title>{% if page.url != '/' and page_title %}{{ page_title | escape }} | {% endif %}{{ site.title | escape }}</title>

{%- comment -%}
    See https://ogp.me/
{%- endcomment %}
{% capture opengraph %}

<meta property="og:title" content="{{ page_title | default: site.title | escape }}">

{% if page.excerpt %}
    {%- assign excerpt = page.excerpt %}
{% elsif page.layout == "home" %}
    {% assign excerpt = site.description %}
{% else %}
    {% assign excerpt = "" %}
{% endif %}
{% if excerpt and excerpt != empty %}
<meta name="description" content="{{ excerpt | strip_html | truncate: 200 | normalize_whitespace | escape }}">
<meta property="og:description" content="{{ excerpt | strip_html | truncate: 200 | normalize_whitespace | escape }}">
{% endif %}

{% if site.amethyst.mastodon %}
<link rel="me" href="{{ site.amethyst.mastodon | escape }}">
{% endif %}
{% if site.amethyst.twitter %}
<meta name="twitter:creator" content="@{{ site.amethyst.twitter | escape }}">
<meta name="twitter:site" content="@{{ site.amethyst.twitter | escape }}">
{% endif %}
<meta name="twitter:card" content="summary_large_image">

{% endcapture -%}
{{ opengraph | strip_newlines }}