allow setting of markdown engine with symbol

features/markdown.feature

@@ -0,0 +1,7 @@
+Feature: Markdown support
+  In order to test included Maruku support
+
+  Scenario: Rendering html
+    Given the Server is running at "test-app"
+    When I go to "/markdown.html"
+    Then I should see "<p>Hello World</p>"

fixtures/test-app/config.rb

@@ -11,6 +11,7 @@ page "/target_ignore.html", :proxy => "/should_be_ignored3.html", :ignore => tru
 end
 
 with_layout false do
+  page "/markdown.html"
   page "/relative_image.html"
   page "/inline-css.html"
   page "/inline-js.html"

fixtures/test-app/source/markdown.html.markdown

@@ -0,0 +1 @@
+Hello World

lib/middleman/core_extensions/front_matter.rb

@@ -6,23 +6,23 @@ module Middleman::CoreExtensions::FrontMatter
     def registered(app)
       app.extend ClassMethods
       
-      ::Tilt::register RDiscountTemplate, 'markdown', 'mkd', 'md'
-      ::Tilt::register RedcarpetTemplate, 'markdown', 'mkd', 'md'
-      ::Tilt::register MarukuTemplate, 'markdown', 'mkd', 'md'
-      ::Tilt::register KramdownTemplate, 'markdown', 'mkd', 'md'
-      app.set :markdown_engine, MarukuTemplate
+      Tilt::register RDiscountTemplate, 'markdown', 'mkd', 'md'
+      Tilt::register RedcarpetTemplate, 'markdown', 'mkd', 'md'
+      Tilt::register MarukuTemplate, 'markdown', 'mkd', 'md'
+      Tilt::register KramdownTemplate, 'markdown', 'mkd', 'md'
+      app.set :markdown_engine_prefix, Middleman::CoreExtensions::FrontMatter
       
-      ::Tilt::register RedClothTemplate,  'textile'
-      ::Tilt.prefer(RedClothTemplate)
+      Tilt::register RedClothTemplate,  'textile'
+      Tilt.prefer(RedClothTemplate)
       
-      ::Tilt::register ERBTemplate,       'erb', 'rhtml'
-      ::Tilt.prefer(ERBTemplate)
+      Tilt::register ERBTemplate,       'erb', 'rhtml'
+      Tilt.prefer(ERBTemplate)
       
-      ::Tilt::register SlimTemplate,      'slim'
-      ::Tilt.prefer(SlimTemplate)
+      Tilt::register SlimTemplate,      'slim'
+      Tilt.prefer(SlimTemplate)
       
-      ::Tilt::register HamlTemplate,      'haml'
-      ::Tilt.prefer(HamlTemplate)
+      Tilt::register HamlTemplate,      'haml'
+      Tilt.prefer(HamlTemplate)
       
       app.after_configuration do
         app.before_processing do
@@ -82,27 +82,27 @@ module Middleman::CoreExtensions::FrontMatter
     end
   end
 
-  class RDiscountTemplate < ::Tilt::RDiscountTemplate
+  class RDiscountTemplate < Tilt::RDiscountTemplate
     include Middleman::CoreExtensions::FrontMatter::YamlAware
   end
-  class RedcarpetTemplate < ::Tilt::RedcarpetTemplate
+  class RedcarpetTemplate < Tilt::RedcarpetTemplate
     include Middleman::CoreExtensions::FrontMatter::YamlAware
   end
-  class MarukuTemplate < ::Tilt::MarukuTemplate
+  class MarukuTemplate < Tilt::MarukuTemplate
     include Middleman::CoreExtensions::FrontMatter::YamlAware
   end
-  class RedClothTemplate < ::Tilt::RedClothTemplate
+  class RedClothTemplate < Tilt::RedClothTemplate
     include Middleman::CoreExtensions::FrontMatter::YamlAware
   end
-  class KramdownTemplate < ::Tilt::KramdownTemplate
+  class KramdownTemplate < Tilt::KramdownTemplate
     include Middleman::CoreExtensions::FrontMatter::YamlAware
   end
  
-  class ERBTemplate < ::Tilt::ERBTemplate
+  class ERBTemplate < Tilt::ERBTemplate
     include Middleman::CoreExtensions::FrontMatter::YamlAware
   end
 
-  class HamlTemplate < ::Tilt::HamlTemplate
+  class HamlTemplate < Tilt::HamlTemplate
     include Middleman::CoreExtensions::FrontMatter::YamlAware
   end
   

lib/middleman/renderers/markdown.rb

@@ -1,11 +1,34 @@
+require "tilt"
+
 module Middleman::Renderers::Markdown
   class << self
     def registered(app)
-      app.set :markdown_engine, ::Tilt::MarukuTemplate
+      app.extend ClassMethods
+      
+      app.set :markdown_engine, :maruku
+      
+      if !app.respond_to? :markdown_engine_prefix
+        app.set :markdown_engine_prefix, Tilt
+      end
+      
       app.after_configuration do
-        ::Tilt.prefer(app.settings.markdown_engine)
+        engine = app.settings.markdown_engine
+        
+        if engine.is_a? Symbol
+          engine = app.tilt_template_from_symbol(engine)
+        end
+        
+        Tilt.prefer(engine)
       end
     end
     alias :included :registered
   end
+  
+  module ClassMethods
+    def tilt_template_from_symbol(engine)
+      engine = engine.to_s
+      engine = engine == "rdiscount" ? "RDiscount" : engine.camelize
+      settings.markdown_engine_prefix.const_get("#{engine}Template")
+    end
+  end
 end