Sass support should be shipped outside core.

jekyll.gemspec

@@ -38,8 +38,8 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency('colorator', "~> 0.1")
   s.add_runtime_dependency('redcarpet', "~> 3.1")
   s.add_runtime_dependency('toml', '~> 0.1.0')
-  s.add_runtime_dependency('sass', '~> 3.2')
   s.add_runtime_dependency('jekyll-coffeescript', '~> 1.0')
+  s.add_runtime_dependency('jekyll-sass-converter', '~> 1.0.0.alpha.1')
 
   s.add_development_dependency('rake', "~> 10.1")
   s.add_development_dependency('rdoc', "~> 3.11")

lib/jekyll.rb

@@ -27,7 +27,6 @@ require 'liquid'
 require 'maruku'
 require 'colorator'
 require 'toml'
-require 'sass'
 
 # internal requires
 require 'jekyll/version'

lib/jekyll/converters/sass.rb

@@ -1,58 +0,0 @@
-module Jekyll
-  class Sass < Converter
-    safe true
-    priority :low
-
-    def matches(ext)
-      ext =~ /^\.s(a|c)ss$/i
-    end
-
-    def output_ext(ext)
-      ".css"
-    end
-
-    def jekyll_sass_configuration
-      @config["sass"] || {}
-    end
-
-    def sass_build_configuration_options(overrides)
-      jekyll_sass_configuration.deep_merge(overrides).symbolize_keys
-    end
-
-    def syntax_type_of_content(content)
-      if content.include?(";") || content.include?("{")
-        :scss
-      else
-        :sass
-      end
-    end
-
-    def sass_dir
-      return "_sass" if jekyll_sass_configuration["sass_dir"].to_s.empty?
-      jekyll_sass_configuration["sass_dir"]
-    end
-
-    def sass_dir_relative_to_site_source
-      File.join(
-        @config["source"],
-        File.expand_path(sass_dir, "/") # FIXME: Not windows-compatible
-      )
-    end
-
-    def allow_caching?
-      !@config["safe"]
-    end
-
-    def sass_configs(content = "")
-      sass_build_configuration_options({
-        "syntax" => syntax_type_of_content(content),
-        "cache"  => allow_caching?,
-        "load_paths" => [sass_dir_relative_to_site_source]
-      })
-    end
-
-    def convert(content)
-      ::Sass.compile(content, sass_configs(content))
-    end
-  end
-end