shared-bulma-theme/layouts/sitemap.xml

<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:image="http://www.google.com/schemas/sitemap-image/1.1">
  {{ range .Site.RegularPages }}
  {{ if (eq .IsPage true) }}
  {{ $rating := index .Site.Data.compatibility ( string .Params.compatibility | default "0" ) }}
  <url>

    <loc>{{ .Permalink }}</loc>

    {{ if (eq .Section "entry") }}{{- $banner_fn := .Params.Banner | default (print .File.BaseFileName ".png") -}}
    <image:image>{{- $fn := printf "/images/banners/%s" $banner_fn -}}{{- $banner := resources.Get $fn -}}
      {{ with $banner }}<image:loc>{{- $thumb := .Fit "824x306 jpg" | resources.Copy (printf "%s.jpg" $fn) -}}{{ $thumb.Permalink }}</image:loc>{{ end }}
    </image:image>
    {{ else if (eq .Section "game") }}
    <image:image>{{- $fn := printf "/images/game/icons/%s.png" .File.BaseFileName -}}{{- $icon := resources.Get $fn -}}
      {{ with $icon }}<image:loc>{{- $thumb := .Fill "48x48 jpg" | resources.Copy (printf "%s.jpg" $fn) -}}{{ $thumb.Permalink }}</image:loc>{{ end }}
    </image:image>
    {{ end }}

    {{ if not .Lastmod.IsZero }}<lastmod>{{ safeHTML ( .Lastmod.Format "2006-01-02T15:04:05-07:00" ) }}</lastmod>{{ end }}
    {{ with .Sitemap.ChangeFreq }}<changefreq>{{ . }}</changefreq>{{ end }}
    {{ if ge .Sitemap.Priority 0.0 }}<priority>{{ .Sitemap.Priority }}</priority>{{ end }}
  </url>
  {{ end }}
  {{ end }}
</urlset>