Add Jekyll RSS

- Use Jekyll Feed
- Strip whitespace from the Gemfile
- Add `rss.xml` in the web root

Author: jbampton

Gemfile

@@ -1,10 +1,14 @@
 source 'https://rubygems.org'
 
-gem 'github-pages'
+gem 'github-pages', group: :jekyll_plugins
+
+group :jekyll_plugins do
+  gem 'jekyll-feed'
+end
 
 group :scripts do 
-  gem 'mgem' 
-  gem 'git' 
+  gem 'mgem'
+  gem 'git'
 
   # API Docs
   gem 'yard-mruby'

Gemfile.lock

@@ -266,6 +266,7 @@ PLATFORMS
 DEPENDENCIES
   git
   github-pages
+  jekyll-feed
   mgem
   yard-coderay
   yard-mruby

_config.yml

@@ -11,6 +11,8 @@ highlighter: rouge
 url: https://mruby.org
 repository: https://github.com/mruby/mruby.github.io
 include: _index.html
+plugins:
+  - jekyll-feed
 exclude:
 - Gemfile
 - Gemfile.lock

_includes/footer.html

@@ -2,4 +2,9 @@
         <div class="container">
           <a href="https://github.com/h2so5/mruby-logo">mruby-logo</a> provided by <a href="https://github.com/h2so5">h2so5</a>
         </div>
+        <div>
+          <a href="/rss.xml">
+            <img src="/images/icons/rss-feed.png" alt="RSS feed" title="RSS feed" width="25" height="25">
+          </a>
+        </div>
       </footer>

images/icons/rss-feed.png

@@ -0,0 +1,31 @@
+---
+layout: null
+---
+<?xml version="1.0" encoding="UTF-8"?>
+<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
+    <channel>
+        <title>{{ site.title | xml_escape }}</title>
+        <description>{{ site.description | xml_escape }}</description>
+        <link>{{ site.url }}{{ site.baseurl }}/</link>
+        <atom:link href="{{ "/rss.xml" | prepend: site.baseurl | prepend: site.url }}" rel="self" type="application/rss+xml"/>
+        <pubDate>{{ site.time | date_to_rfc822 }}</pubDate>
+        <lastBuildDate>{{ site.time | date_to_rfc822 }}</lastBuildDate>
+        <generator>Jekyll v{{ jekyll.version }}</generator>
+        {% for post in site.posts %}
+        <item>
+            <title>{{ post.title | xml_escape }}</title>
+            <author></author>
+            <description>{{ post.content | xml_escape }}</description>
+            <pubDate>{{ post.date | date_to_rfc822 }}</pubDate>
+            <link>{{ post.url | prepend: site.baseurl | prepend: site.url }}</link>
+            <guid isPermaLink="true">{{ post.url | prepend: site.baseurl | prepend: site.url }}</guid>
+            {% for tag in post.tags %}
+            <category>{{ tag | xml_escape }}</category>
+            {% endfor %}
+            {% for cat in post.categories %}
+            <category>{{ cat | xml_escape }}</category>
+            {% endfor %}
+        </item>
+        {% endfor %}
+    </channel>
+</rss>