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@@ -1 +1,8 @@
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+#!/usr/bin/env ruby
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+
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+require File.dirname(__FILE__) + '/../lib/haml'
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+require 'haml/exec'
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+
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+opts = Haml::Exec::CSS2Sass.new(ARGV)
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+opts.parse!

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@@ -253,6 +253,37 @@
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         output.write(::Haml::HTML.new(input).render)
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       end
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     end
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+
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+    # A class encapsulating executable functionality
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+    # specific to the css2sass executable.
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+    class CSS2Sass < Generic # :nodoc:
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+      def initialize(args)
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+        super
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+
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+        require 'sass/css'
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+      end
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+
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+      def set_opts(opts)
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+        opts.banner = <<END
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+Usage: css2sass [options] (css file) (output file)
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+
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+Description: Transforms a CSS file into corresponding Sass code.
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+
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+Options:
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+END
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+
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+        super
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+      end
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+
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+      def process_result
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+        super
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+
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+        input = @options[:input]
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+        output = @options[:output]
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+
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+        output.write(::Sass::CSS.new(input).render)
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+      end
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+    end
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   end
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 end

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@@ -1 +1,92 @@
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+require File.dirname(__FILE__) + '/../sass'
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+require 'sass/tree/node'
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+require 'strscan'
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+
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+module Sass
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+  # :stopdoc:
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+  module Tree
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+    class Node
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+      def to_sass
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+        result = ''
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+
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+        children.each do |child|
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+          result << "#{child.to_sass(0)}\n"
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+        end
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+
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+        result
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+      end
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+    end
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+
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+    class RuleNode
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+      def to_sass(tabs)
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+        str = "#{'  ' * tabs}#{rule}\n"
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+
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+        children.each do |child|
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+          str << "#{child.to_sass(tabs + 1)}\n"
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+        end
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+
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+        str
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+      end
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+    end
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+
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+    class AttrNode
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+      def to_sass(tabs)
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+        "#{'  ' * tabs}:#{name} #{value}"
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+      end
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+    end
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+  end
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+  # :startdoc:
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+
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+  # This class contains the functionality used in the +css2sass+ utility,
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+  # namely converting CSS documents to Sass templates.
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+  class CSS
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+    # :stopdoc:
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+
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+    # The Regexp matching a CSS rule
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+    RULE_RE = /\s*([^\{]+)\s*\{/
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+
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+    # The Regexp matching a CSS attribute
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+    ATTR_RE = /\s*[^::\{\}]+\s*:\s*[^:;\{\}]+\s*;/
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+
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+    # :startdoc:
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+
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+    # Creates a new instance of Sass::CSS that will compile the given document
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+    # to a Sass string when +render+ is called.
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+    def initialize(template)
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+      if template.is_a? IO
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+        template = template.read
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+      end
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+
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+      @template = StringScanner.new(template)
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+    end
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+
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+    # Processes the document and returns the result as a string
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+    # containing the CSS template.
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+    def render
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+      build_tree.to_sass
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+    end
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+
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+    private
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+
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+    def build_tree
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+      root = Tree::Node.new(nil)
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+
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+      while @template.scan(RULE_RE)
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+        rule = Tree::RuleNode.new(@template[0][0...-1].strip, nil)
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+        root << rule
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+
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+        while @template.scan(ATTR_RE)
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+          attrs = @template[0][0...-1].split(':').map {|s| s.strip}
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+          rule << Tree::AttrNode.new(attrs[0], attrs[1], nil)
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+        end
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+
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+        if @template.scan(/\s*\}/).nil?
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+          raise "Invalid CSS!"
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+        end
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+      end
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+
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+      root
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+    end
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+  end
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+end