Allow to create atom feeds for selected tags

_ext/pipeline.rb

@@ -1,3 +1,4 @@
+require 'tag-atomizer'
 
 Awestruct::Extensions::Pipeline.new do
   extension Awestruct::Extensions::Posts.new('/blog')
@@ -14,6 +15,7 @@
   extension Awestruct::Extensions::TagCloud.new(:posts,
                                                 '/blog/tags/index.html',
                                                 :layout=>'base')
+  extension TagAtomizer.new(:tags => ['fedora'])
 
   helper Awestruct::Extensions::GoogleAnalytics
 end

_ext/tag-atomizer.rb

@@ -0,0 +1,20 @@
+class TagAtomizer
+  def initialize(entries_name, options = {})
+    @entries_name = entries_name
+    @options = {
+        :tags => []
+    }.merge(options)
+  end
+
+  def execute(site)
+    atoms = {}
+
+    site.posts_tags.each do |tag|
+      if @options[:tags].include?(tag.to_s) or @options[:tags].empty?
+        site.send( "#{@entries_name}_#{tag.to_s}=", tag.pages )
+        Awestruct::Extensions::Atomizer.new("#{@entries_name}_#{tag.to_s}".to_sym, "/#{tag.to_s}.atom").execute(site)
+      end
+    end
+  end
+end
+