layouts/_default/rss.xml

<!-- internal template -->
{{- /* Deprecate site.Author.email in favor of site.Params.author.email */}}
{{- $authorEmail := "" }}
{{- with site.Params.author }}
  {{- if reflect.IsMap . }}
    {{- with .email }}
      {{- $authorEmail = . }}
    {{- end }}
  {{- end }}
{{- else }}
  {{- with site.Author.email }}
    {{- $authorEmail = . }}
    {{- warnf "The author key in site configuration is deprecated. Use params.author.email instead." }}
  {{- end }}
{{- end }}

{{- /* Deprecate site.Author.name in favor of site.Params.author.name */}}
{{- $authorName := "" }}
{{- with site.Params.author }}
  {{- if reflect.IsMap . }}
    {{- with .name }}
      {{- $authorName = . }}
    {{- end }}
  {{- else }}
    {{- $authorName  = . }}
  {{- end }}
{{- else }}
  {{- with site.Author.name }}
    {{- $authorName = . }}
    {{- warnf "The author key in site configuration is deprecated. Use params.author.name instead." }}
  {{- end }}
{{- end }}

{{- $desc := or .Params.Subtitle .Params.Description .Description .Summary }}

{{- $pctx := . }}
{{- if .IsHome }}{{ $pctx = site }}{{ end }}
{{- $pages := slice }}
{{- if or $.IsHome $.IsSection }}
{{- $pages = where $pctx.RegularPages "Type"  (or "post" "articles") }}
{{- else }}
{{- $pages = $pctx.Pages }}
{{- end }}
{{- $limit := site.Config.Services.RSS.Limit }}
{{- if ge $limit 1 }}
{{- $pages = $pages | first $limit }}
{{- end }}
{{- printf "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\"?>" | safeHTML }}
<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
  <channel>
    <title>{{ if eq .Title site.Title }}{{ site.Title }}{{ else }}{{ with .Title }}{{ . }} on {{ end }}{{ site.Title }}{{ end }}</title>
    <link>{{ .Permalink }}</link>
    <description>{{ i18n "recent"}} {{ if ne .Title site.Title }}{{ with .Title }}{{ i18n "in" | lower}} {{ . }} {{ end }}{{ end }}{{ i18n "on" | lower }} {{ site.Title }}</description>
    <generator>Hugo {{ hugo.Version }}</generator>
    <language>{{ site.Language.LanguageCode }}</language>
    {{ with $authorName -}}
      <managingEditor>{{ . }}</managingEditor>
    {{ end -}}
    {{ with $authorName }}
      <webMaster>{{ . }}</webMaster>
    {{ end -}}
    {{ with site.Copyright -}}
      <copyright>{{ . }}</copyright>
    {{ end -}}
    <lastBuildDate>{{ now.Format "Mon, 02 Jan 2006 15:04:05 -0700" | safeHTML }}</lastBuildDate>
    {{ with .OutputFormats.Get "RSS" -}}
      {{ printf "<atom:link href=%q rel=\"self\" type=%q />" .Permalink .MediaType | safeHTML -}}
    {{ end -}}
    {{- range $pages }}
    <item>
      <title>{{ .Title }}</title>
      <link>{{ .Permalink }}</link>
      <pubDate>{{ .PublishDate.Format "Mon, 02 Jan 2006 15:04:05 -0700" | safeHTML }}</pubDate>
      {{ with $authorName -}}
        <author>{{ . }}</author>
      {{ end -}}
      <guid>{{ .Permalink }}</guid>
      <description>{{ $desc | transform.XMLEscape | safeHTML }}</description>
      {{- $cover := partial "partials/page/cover.html" (dict "page" .) }}
      {{ with $cover -}}
        <enclosure url="{{ . }}" length="0" type="image/jpeg" />
      {{- end }}
    </item>
    {{- end }}
  </channel>
</rss>