Support runtime compilation

lib/hamlit/filters/coffee.rb

@@ -4,12 +4,29 @@ module Hamlit
   class Filters
     class Coffee < TiltBase
       def compile(node)
+        if Haml::Util.contains_interpolation?(node.value[:text])
+          return runtime_compile(node)
+        end
+
         temple = [:multi]
         temple << [:static, "<script>\n".freeze]
         temple << [:static, TiltBase.render('coffee', node.value[:text])]
         temple << [:static, "</script>".freeze]
         temple
       end
+
+      private
+
+      def runtime_compile(node)
+        source = Haml::Util.unescape_interpolation(node.value[:text])
+        code = "::Hamlit::Filters::TiltBase.render('coffee', #{source})"
+
+        temple = [:multi]
+        temple << [:static, "<script>\n".freeze]
+        temple << [:dynamic, code]
+        temple << [:static, "</script>".freeze]
+        temple
+      end
     end
   end
 end

lib/hamlit/filters/tilt_base.rb

@@ -1,11 +1,9 @@
 module Hamlit
   class Filters
     class TiltBase < Base
-      class << self
-        def render(name, source)
-          text = ::Tilt["t.#{name}"].new { source }.render
-          text.gsub!(/^/, '  '.freeze)
-        end
+      def self.render(name, source)
+        text = ::Tilt["t.#{name}"].new { source }.render
+        text.gsub!(/^/, '  '.freeze)
       end
     end
   end

test/hamlit/filters/coffee_test.rb

@@ -41,7 +41,6 @@ describe Hamlit::Filters do
     end
 
     it 'renders coffeescript filter' do
-      skip
       assert_render(<<-'HAML', <<-HTML)
         :coffee
           foo = ->