implement /comments.rss

app/models/comment.rb

@@ -272,6 +272,10 @@ class Comment < ActiveRecord::Base
     end
   end
 
+  def short_id_url
+    self.story.short_id_url + "/_/comments/#{self.short_id}"
+  end
+
   def url
     self.story.comments_url + "/comments/#{self.short_id}"
   end

app/views/comments/index.rss

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<% coder = HTMLEntities.new %>
+<rss version="2.0">
+  <channel>
+    <title>lobste.rs<%= @title.present? ? ": " + h(@title) : "" %></title>
+    <description><%= @title %></description>
+    <link><%= root_url %>comments</link>
+
+    <% @comments.each do |comment| %>
+      <item>
+        <title>on <%= raw coder.encode(comment.story.title, :decimal) %></title>
+        <link><%= comment.url %></link>
+        <guid><%= comment.short_id_url %></guid>
+        <author><%= comment.user.username %></author>
+        <pubDate><%= comment.created_at.rfc2822 %></pubDate>
+        <comments><%= comment.url %></comments>
+        <description><%= raw coder.encode(comment.markeddown_comment,
+          :decimal) %></description>
+      </item>
+    <% end %>
+  </channel>
+</rss>
+