Tweak the RSS feed

The default RSS template comes from
https://gohugo.io/templates/rss/#the-embedded-rss-xml

* Limit the number of items (it's unlimited by default)
* Rename the feed from "index.xml" to "feed.xml"
* Provide the full content of each post instead of a summary
* Change the title and description of the feed
* Add a link to the feed at the bottom of each post

config.yaml

@@ -9,6 +9,7 @@ googleAnalytics: UA-90320718-1
 languageCode: en-us
 pygmentsCodefences: true
 pygmentsStyle: monokai
+rssLimit: 20
 title: Danny Guo
 
 outputFormats:
@@ -17,11 +18,13 @@ outputFormats:
     isPlainText: true
     mediaType: "application/json"
     notAlternative: true
+  RSS:
+    mediatype: application/rss
+    baseName: feed
 
 outputs:
   home:
     - HTML
-    - RSS
     - Algolia
 
 params:

layouts/blog/rss.xml

@@ -0,0 +1,26 @@
+<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
+  <channel>
+    <title>{{ .Site.Author.name }}</title>
+    <link>{{ .Permalink }}</link>
+    <description>Blog posts by {{ .Site.Author.name }}</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" }}
+        {{ printf "<atom:link href=%q rel=\"self\" type=%q />" .Permalink .MediaType | safeHTML }}
+    {{ 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}}
+      <guid>{{ .Permalink }}</guid>
+      <description>{{ .Content | html }}</description>
+    </item>
+    {{ end }}
+  </channel>
+</rss>

layouts/blog/single.html

@@ -27,6 +27,8 @@ <h1>{{ .Title }}</h1>
     <hr class="separator">
 
     <p class="edit-message">
+        Subscribe to <a href="{{ "/blog/feed.xml" | absURL }}" type="application/rss+xml">this RSS feed</a> for more posts.
+        <br>
         Found an error or typo? Feel free to open a pull request on
         <a href="{{ .Site.Params.sourceCodeRepo }}/content/{{ .File.Path }}">GitHub</a>.
     </p>