middleman--middleman/lib/middleman/renderers/sass.rb

require "sass"
require "sass/plugin"
require "compass"
require "susy"

module Middleman
  module Renderers
    module Sass
      class << self
        def registered(app)
          app.after_feature_init do
            views_root = File.basename(self.views)
            ::Compass.configuration do |config|
              config.cache_path            = File.join(self.root, ".sass-cache") # For sassc files
              config.project_path          = self.root
              config.sass_dir              = File.join(views_root, self.css_dir)
              config.output_style          = :nested
              config.fonts_dir             = File.join(views_root, self.fonts_dir)
              config.css_dir               = File.join(views_root, self.css_dir)
              config.images_dir            = File.join(views_root, self.images_dir)      
              config.http_images_path      = self.http_images_path rescue File.join(self.http_prefix || "/", self.images_dir)
              config.http_stylesheets_path = self.http_css_path rescue File.join(self.http_prefix || "/", self.css_dir)
              config.asset_cache_buster :none

              config.add_import_path(config.sass_dir)
            end

            configure :build do
              build_root = File.basename(self.build_dir)
              ::Compass.configuration do |config|
                config.css_dir    = File.join(build_root, self.css_dir)
                config.images_dir = File.join(build_root, self.images_dir)
              end
            end
          end
        end
        alias :included :registered
      end
    end
  end
end

class Tilt::SassPlusCSSFilenameTemplate < Tilt::SassTemplate
  def sass_options
    return super if basename.nil?
    
    location_of_sass_file = Middleman::Server.environment == :build ? 
                              File.join(Middleman::Server.root, Middleman::Server.build_dir) : 
                              Middleman::Server.views

    parts = basename.split('.')
    parts.pop
    css_filename = File.join(location_of_sass_file, Middleman::Server.css_dir, parts.join("."))
    super.merge(::Compass.configuration.to_sass_engine_options).merge(:css_filename => css_filename)
  end
  
  def evaluate(scope, locals, &block)
    begin
      super
    rescue Sass::SyntaxError => e
      Sass::SyntaxError.exception_to_css(e, :full_exception => true)
    end
  end
end
Tilt.register 'sass', Tilt::SassPlusCSSFilenameTemplate

class Tilt::ScssPlusCSSFilenameTemplate < Tilt::SassPlusCSSFilenameTemplate
  def sass_options
    super.merge(:syntax => :scss)
  end
end
Tilt.register 'scss', Tilt::ScssPlusCSSFilenameTemplate


module Middleman::Renderers::Haml
  module Sass
    include ::Haml::Filters::Base

    def render(text)
      ::Sass::Engine.new(text, ::Compass.configuration.to_sass_engine_options).render
    end
  end
end