Testing out Hugo's image finding routine in the twitter_card shortcode

tct.html

<!-- save in /layouts/shortcodes/tct.html -->
<!-- usage: {{< tct >}}                   -->
<div>
    {{- with $.Page.Params.images -}}
    <span>Image: page.params.images[0]: <code>{{ index . 0 | absURL }}</code> </span> 
    {{ else -}}
    {{- $images := $.Page.Resources.ByType "image" -}}
    {{- $featured := $images.GetMatch "*feature*" -}}
    {{- $featured := cond (ne $featured nil) $featured ($images.GetMatch "{*cover*,*thumbnail*}") -}}
    {{- with $featured -}}
    <span>Image: page.resources./.*featured.*/: <code>{{ $featured.Permalink }}</code></span> 
    {{- else -}}
    {{- with $.Site.Params.images -}}
    <span>Image: site.params.images[0]: <code>{{ index . 0 | absURL }}</code></span> 
    {{ else -}}
    {{- end -}}
    {{- end -}}
    {{- end }}
</div>