fix(rss): update RSS template and Hugo version for compatibility (#417)

Hugo v0.156.0 removed the deprecated .Site.Author field, breaking the
RSS template. Align the RSS template with Hugo's current embedded
default by using site.Params.author, transform.XMLEscape, .PublishDate,
and proper lastBuildDate computation. Bump CI Hugo version from 0.151.0
to 0.157.0.

Signed-off-by: Marco Nenciarini <marco.nenciarini@enterprisedb.com>

Author: mnencia

.github/workflows/hugo_build.yml

@@ -36,7 +36,7 @@ jobs:
       - name: Setup Hugo
         uses: peaceiris/actions-hugo@v2
         with:
-          hugo-version: "0.151.0"
+          hugo-version: "0.157.0"
           extended: true
 
       - name: Build

layouts/home.rss.xml

@@ -1,39 +1,59 @@
-{{- $pctx := . -}}
-{{- if .IsHome -}}{{ $pctx = .Site }}{{- end -}}
-{{- $pages := slice -}}
-{{- if or $.IsHome $.IsSection -}}
-{{- $pages = where $pctx.RegularPages "Type" "blog" -}}
-{{- else -}}
-{{- $pages = where $pctx.Pages "Type" "blog" -}}
-{{- end -}}
-{{- $limit := .Site.Config.Services.RSS.Limit -}}
-{{- if ge $limit 1 -}}
-{{- $pages = $pages | first $limit -}}
-{{- end -}}
+{{- $authorEmail := "" }}
+{{- with site.Params.author }}
+  {{- if reflect.IsMap . }}
+    {{- with .email }}
+      {{- $authorEmail = . }}
+    {{- end }}
+  {{- end }}
+{{- end }}
+
+{{- $authorName := "" }}
+{{- with site.Params.author }}
+  {{- if reflect.IsMap . }}
+    {{- with .name }}
+      {{- $authorName = . }}
+    {{- end }}
+  {{- else }}
+    {{- $authorName  = . }}
+  {{- end }}
+{{- end }}
+
+{{- $pctx := . }}
+{{- if .IsHome }}{{ $pctx = .Site }}{{ end }}
+{{- $pages := slice }}
+{{- if or $.IsHome $.IsSection }}
+{{- $pages = where $pctx.RegularPages "Type" "blog" }}
+{{- else }}
+{{- $pages = where $pctx.Pages "Type" "blog" }}
+{{- 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>
+    <title>{{ if eq .Title .Site.Title }}{{ .Site.Title }}{{ else }}{{ with .Title }}{{ . }} on {{ end }}{{ .Site.Title }}{{ end }}</title>
     <link>{{ .Permalink }}</link>
-    <description>Recent content {{ if ne  .Title  .Site.Title }}{{ with .Title }}in {{.}} {{ end }}{{ end }}on {{ .Site.Title }}</description>
-    <generator>Hugo -- gohugo.io</generator>{{ with .Site.LanguageCode }}
-    <language>{{.}}</language>{{end}}{{ with .Site.Author.email }}
-    <managingEditor>{{.}}{{ with $.Site.Author.name }} ({{.}}){{end}}</managingEditor>{{end}}{{ with .Site.Author.email }}
-    <webMaster>{{.}}{{ with $.Site.Author.name }} ({{.}}){{end}}</webMaster>{{end}}{{ with .Site.Copyright }}
-    <copyright>{{.}}</copyright>{{end}}{{ if not .Date.IsZero }}
-    <lastBuildDate>{{ .Date.Format "Mon, 02 Jan 2006 15:04:05 -0700" | safeHTML }}</lastBuildDate>{{ end }}
-    {{- with .OutputFormats.Get "RSS" -}}
+    <description>Recent content {{ if ne .Title .Site.Title }}{{ with .Title }}in {{ . }} {{ end }}{{ end }}on {{ .Site.Title }}</description>
+    <generator>Hugo</generator>
+    <language>{{ site.LanguageCode }}</language>{{ with $authorEmail }}
+    <managingEditor>{{ . }}{{ with $authorName }} ({{ . }}){{ end }}</managingEditor>{{ end }}{{ with $authorEmail }}
+    <webMaster>{{ . }}{{ with $authorName }} ({{ . }}){{ end }}</webMaster>{{ end }}{{ with .Site.Copyright }}
+    <copyright>{{ . }}</copyright>{{ end }}{{ if not .Date.IsZero }}
+    <lastBuildDate>{{ (index $pages.ByLastmod.Reverse 0).Lastmod.Format "Mon, 02 Jan 2006 15:04:05 -0700" | safeHTML }}</lastBuildDate>{{ end }}
+    {{- with .OutputFormats.Get "RSS" }}
     {{ printf "<atom:link href=%q rel=\"self\" type=%q />" .Permalink .MediaType | safeHTML }}
-    {{- end -}}
-    {{ range $pages }}
+    {{- end }}
+    {{- range $pages }}
     <item>
       <title>{{ .Title }}</title>
       <link>{{ .Permalink }}</link>
-      <pubDate>{{ .Date.Format "Mon, 02 Jan 2006 15:04:05 -0700" | safeHTML }}</pubDate>
-      {{ with .Site.Author.email }}<author>{{.}}{{ with $.Site.Author.name }} ({{.}}){{end}}</author>{{end}}
+      <pubDate>{{ .PublishDate.Format "Mon, 02 Jan 2006 15:04:05 -0700" | safeHTML }}</pubDate>
+      {{- with $authorEmail }}<author>{{ . }}{{ with $authorName }} ({{ . }}){{ end }}</author>{{ end }}
       <guid>{{ .Permalink }}</guid>
-      <description>{{ .Summary | html }}</description>
+      <description>{{ .Summary | transform.XMLEscape | safeHTML }}</description>
     </item>
-    {{ end -}}
+    {{- end }}
   </channel>
 </rss>