Basic support for Haml layouts.

README.textile

@@ -172,8 +172,8 @@ To transform ".haml":http://github.com/nex3/haml/tree/master files to HTML
 
   $ jekyll --haml
 
-Note that files must have a YAML metadata block at the top to be converted,
-and that Haml cannot currently be used for layouts -- only posts and pages.
+Note that pages and posts must have a YAML metadata block at the top to be
+converted. Layouts don't need to.
 
 Haml content is intentionally not filtered, so you can use any Ruby code.
 
@@ -269,9 +269,8 @@ h2. Data
 
 Jekyll traverses your site looking for files to process. Any files with YAML
 front matter (see below) are subject to processing. For each of these files,
-Jekyll makes a variety of data available to the pages via Haml (regular pages
-only) or the Liquid templating system. The following is a reference of the
-available data.
+Jekyll makes a variety of data available to the pages via Haml or the Liquid
+Liquid templating system. The following is a reference of the available data.
 
 h3. Global
 

lib/jekyll/convertible.rb

@@ -89,7 +89,17 @@ def do_layout(payload, layouts)
       layout = layouts[self.data["layout"]]
       while layout
         payload = payload.deep_merge({"content" => self.output, "page" => layout.data})
-        self.output = Liquid::Template.parse(layout.content).render(payload, info)
+
+        if site.config['haml'] && layout.content.is_a?(Haml::Engine)
+          context = OpenStruct.new(
+            :page => OpenStruct.new(payload["page"]),
+            :site => OpenStruct.new(payload["site"]),
+            :content => payload["content"])
+          context.extend(HamlHelpers)
+          self.output = layout.content.render(context)
+        else
+          self.output = Liquid::Template.parse(layout.content).render(payload, info)
+        end
 
         layout = layouts[layout.data["layout"]]
       end

lib/jekyll/layout.rb

@@ -22,6 +22,7 @@ def initialize(site, base, name)
 
       self.process(name)
       self.read_yaml(base, name)
+      self.transform
     end
 
     # Extract information from the layout filename