Use the snip extension to detect a render if one is present.

Gemfile.lock

@@ -7,7 +7,7 @@ PATH
       haml
       rack (>= 0.9.1)
       ratom (>= 0.3.5)
-      soup (>= 1.0.3)
+      soup (>= 1.0.5)
       treetop (>= 1.4.1)
 
 GEM
@@ -25,7 +25,7 @@ GEM
     rake (0.8.7)
     ratom (0.6.7)
       libxml-ruby (>= 1.1.2)
-    soup (1.0.3)
+    soup (1.0.5)
     treetop (1.4.9)
       polyglot (>= 0.3.1)
 

Rakefile

@@ -41,7 +41,7 @@ if Object.const_defined?(:Gem)
 
     # All the other gems we need.
     s.add_dependency("rack", ">= 0.9.1")
-    s.add_dependency("soup", ">= 1.0.3")
+    s.add_dependency("soup", ">= 1.0.5")
     s.add_dependency("ratom", ">= 0.3.5")
     s.add_dependency("RedCloth", ">= 4.1.1")
     s.add_dependency("BlueCloth", ">= 1.0.0")

lib/vanilla/app.rb

@@ -75,6 +75,8 @@ def rendering(snip)
     def renderer_for(snip)
       if snip && snip.render_as && !snip.render_as.empty?
         Vanilla::Renderers.const_get(snip.render_as)
+      elsif snip && snip.extension && !snip.extension.empty?
+        Vanilla::Renderers.const_get(renderer_for_extension(snip.extension))
       else
         Vanilla::Renderers::Base
       end
@@ -103,6 +105,16 @@ def snip(attributes)
 
     private
 
+    def renderer_for_extension(extension)
+      mapping = Hash.new("Base")
+      mapping["markdown"] = "Markdown"
+      mapping["textile"] = "Textile"
+      mapping["erb"] = "Erb"
+      mapping["rb"] = "Ruby"
+      mapping["haml"] = "Haml"
+      mapping[extension]
+    end
+
     def prepare_configuration(config_file)
       config_file ||= "config.yml"
       @config = YAML.load(File.open(config_file)) rescue {}

test/vanilla_app_test.rb

@@ -46,6 +46,21 @@
       assert_equal Vanilla::Renderers::Raw, @app.renderer_for(snip)
     end
 
+    context "using the snip extension" do
+      {
+        "markdown" => Vanilla::Renderers::Markdown,
+        "textile" => Vanilla::Renderers::Textile,
+        "erb" => Vanilla::Renderers::Erb,
+        "rb" => Vanilla::Renderers::Ruby,
+        "haml" => Vanilla::Renderers::Haml
+      }.each do |extension, renderer|
+        should "return the renderer #{renderer} when the snip has extension #{extension}" do
+          snip = create_snip(:name => "blah", :extension => extension)
+          assert_equal renderer, @app.renderer_for(snip)
+        end
+      end
+    end
+
     should "return Vanilla::Renderers::Base if no render_as property exists" do
       snip = create_snip(:name => "blah")
       assert_equal Vanilla::Renderers::Base, @app.renderer_for(snip)

vanilla.gemspec

@@ -29,11 +29,6 @@ Gem::Specification.new do |s|
     "test/snip_reference_parser_test.rb",
     "test/snip_reference_test.rb",
     "test/test_helper.rb",
-    "test/tmp",
-    "test/tmp/config.yml",
-    "test/tmp/soup",
-    "test/tmp/soup/current_snip.snip",
-    "test/tmp/soup/layout.snip",
     "test/vanilla_app_test.rb",
     "test/vanilla_presenting_test.rb",
     "test/vanilla_request_test.rb",
@@ -105,7 +100,7 @@ Gem::Specification.new do |s|
 
     if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0') then
       s.add_runtime_dependency(%q<rack>, [">= 0.9.1"])
-      s.add_runtime_dependency(%q<soup>, [">= 1.0.3"])
+      s.add_runtime_dependency(%q<soup>, [">= 1.0.5"])
       s.add_runtime_dependency(%q<ratom>, [">= 0.3.5"])
       s.add_runtime_dependency(%q<RedCloth>, [">= 4.1.1"])
       s.add_runtime_dependency(%q<BlueCloth>, [">= 1.0.0"])
@@ -115,7 +110,7 @@ Gem::Specification.new do |s|
       s.add_development_dependency(%q<mocha>, [">= 0"])
     else
       s.add_dependency(%q<rack>, [">= 0.9.1"])
-      s.add_dependency(%q<soup>, [">= 1.0.3"])
+      s.add_dependency(%q<soup>, [">= 1.0.5"])
       s.add_dependency(%q<ratom>, [">= 0.3.5"])
       s.add_dependency(%q<RedCloth>, [">= 4.1.1"])
       s.add_dependency(%q<BlueCloth>, [">= 1.0.0"])
@@ -126,7 +121,7 @@ Gem::Specification.new do |s|
     end
   else
     s.add_dependency(%q<rack>, [">= 0.9.1"])
-    s.add_dependency(%q<soup>, [">= 1.0.3"])
+    s.add_dependency(%q<soup>, [">= 1.0.5"])
     s.add_dependency(%q<ratom>, [">= 0.3.5"])
     s.add_dependency(%q<RedCloth>, [">= 4.1.1"])
     s.add_dependency(%q<BlueCloth>, [">= 1.0.0"])