Feed: Use full URL for entry links; set <updated>.

Relative URLs for entries confused TwitterFeed.com, so we now use the full
URL.

Previously, the <updated> element of <feed> wasn't dynamic. Now it's set to
the date of the most recent entry.

Rakefile

@@ -147,9 +147,11 @@ task :html => SOURCE_HTML do |t|
          result({:toc => toc.dup.reject{|e| e[:type] == :subsection}})
   mkdir_p 'output/toc'
   File.open('output/toc/index.html','w') {|file| file.puts page}
+  recipes_by_time = toc.reject{|e| e[:type] == :subsection}.
+                        sort_by{|e| e[:time]}.reverse
   page = Erubis::Eruby.new(File.open('templates/atom.atom').read).
-         result({:toc => toc.
-                reject{|e| e[:type] == :subsection}.sort_by{|e| e[:time]}.reverse
+         result({:toc => recipes_by_time,
+                 :updated => recipes_by_time.first[:time]            
           })
   File.open('output/index.atom','w') {|file| file.puts page}
 end

templates/atom.atom

@@ -3,26 +3,25 @@
   xmlns:thr="http://purl.org/syndication/thread/1.0">
   <link rel="self" href="http://vim.runpaint.org/index.atom"/>
   <id>http://vim.runpaint.org/index.atom</id>
-
   <title>Vim Recipes</title>
   <subtitle>A cookbook for the Vim text editor</subtitle>
   <author>
     <name>Run Paint Run Run</name>
     <email>runrun@runpaint.org</email>
     <uri>http://runpaint.org/</uri>
   </author>
-  <updated>2009-05-13T08:42:22-04:00</updated> <!-- FIXME -->
+  <% require 'time' %>
+  <updated><%= updated.xmlschema %></updated>
   <link href="http://vim.runpaint.org/"/>
   <link rel="license" href="http://creativecommons.org/licenses/by-sa/3.0/"/>
 
   <% 
-  require 'time'
   toc.each do |entry|
     next unless entry[:type] == :recipe
   %>  
   <entry>
     <id>tag:vim.runpaint.org,2009:<%= entry[:id] %></id>
-    <link href="/<%= entry[:section_id] %>/<%= entry[:id] %>/"/>
+    <link href="http://vim.runpaint.org/<%= entry[:section_id] %>/<%= entry[:id] %>/"/>
     <title><%= entry[:title] %></title>
     <updated><%= entry[:time].xmlschema %></updated>
     <content type="xhtml"><div xmlns="http://www.w3.org/1999/xhtml">