From b7ba05f7c1c018ff318888eaea1cf7d21216c48c Mon Sep 17 00:00:00 2001
From: Chris Eppstein <chris@eppsteins.net>
Date: Sun, 16 Aug 2009 18:12:59 -0700
Subject: [PATCH] [Extensions] Compass extensions can now process the content
 they deliver through ERB.

---
 lib/compass/actions.rb                     |  6 ++++
 lib/compass/installers/base.rb             |  7 ++++-
 lib/compass/installers/template_context.rb | 34 ++++++++++++++++++----
 3 files changed, 40 insertions(+), 7 deletions(-)

diff --git a/lib/compass/actions.rb b/lib/compass/actions.rb
index 3959f7a2..0c7c2cae 100644
--- a/lib/compass/actions.rb
+++ b/lib/compass/actions.rb
@@ -32,6 +32,7 @@ module Compass
     def write_file(file_name, contents, options = nil, binary = false)
       options ||= self.options if self.respond_to?(:options)
       skip_write = options[:dry_run]
+      contents = process_erb(contents, options[:erb]) if options[:erb]
       if File.exists?(file_name)
         existing_contents = IO.read(file_name)
         if existing_contents == contents
@@ -57,6 +58,11 @@ module Compass
       end
     end
 
+    def process_erb(contents, ctx = nil)
+      ctx = Object.new.instance_eval("binding") unless ctx.is_a? Binding
+      ERB.new(contents).result(ctx)
+    end
+
     # Compile one Sass file
     def compile(sass_filename, css_filename, options)
       if options[:force] || Sass::Plugin.exact_stylesheet_needs_update?(css_filename, sass_filename)
diff --git a/lib/compass/installers/base.rb b/lib/compass/installers/base.rb
index eab60e54..6d9b6295 100644
--- a/lib/compass/installers/base.rb
+++ b/lib/compass/installers/base.rb
@@ -133,11 +133,16 @@ module Compass
       def install_html(from, to, options)
         if to =~ /\.haml$/
           require 'haml'
-          html = Haml::Engine.new(File.read(templatize(from)), :filename => templatize(from)).render
           to = to[0..-(".haml".length+1)]
           if respond_to?(:install_location_for_html)
             to = install_location_for_html(to, options)
           end
+          contents = File.read(templatize(from))
+          if options.delete(:erb)
+            ctx = TemplateContext.ctx(:to => to, :options => options)
+            contents = process_erb(contents, ctx)
+          end
+          html = Haml::Engine.new(contents, :filename => templatize(from)).render
           write_file(targetize(to), html, options)
         else
           install_html_without_haml(from, to, options)
diff --git a/lib/compass/installers/template_context.rb b/lib/compass/installers/template_context.rb
index a86d9142..4df933fa 100644
--- a/lib/compass/installers/template_context.rb
+++ b/lib/compass/installers/template_context.rb
@@ -1,22 +1,44 @@
 module Compass
   module Installers
     class TemplateContext
+
       def self.ctx(*arguments)
-        new(*arguments).get_binding
+        new(*arguments).send(:get_binding)
       end
-      def initialize(locals = {})
+
+      def initialize(template, locals = {})
+        @template = template
         @locals = locals
       end
+
+      def http_stylesheets_path
+        config.http_stylesheets_path ||
+        config.default_for(:http_stylesheets_path) ||
+        config.http_root_relative(config.css_dir)
+      end
+
+      Compass::Configuration::ATTRIBUTES.each do |attribute|
+        unless instance_methods.include?(attribute.to_s)
+          define_method attribute do
+            config.send(attribute) || config.default_for(attribute)
+          end
+        end
+      end
+
+      def config
+        Compass.configuration
+      end
+
+      alias configuration config
+
+      protected
+
       def get_binding
         @locals.each do |k, v|
           eval("#{k} = v")
         end
         binding
       end
-      def config
-        Compass.configuration
-      end
-      alias configuration config
     end
   end
 end
\ No newline at end of file