/usr/lib/ruby/1.8/compass/stats.rb is in libcompass-ruby1.8 0.10.6~dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 | module Compass
  module Stats
    class StatsVisitor
      attr_accessor :rule_count, :prop_count, :mixin_def_count, :mixin_count
      def initialize
        self.rule_count = 0
        self.prop_count = 0
        self.mixin_def_count = 0
        self.mixin_count = 0
      end
      def visit(node)
        self.prop_count += 1 if node.is_a?(Sass::Tree::PropNode) && !node.children.any?
        if node.is_a?(Sass::Tree::RuleNode)
          self.rule_count += node.rule.reject{|r| r.is_a?(Sass::Script::Node)}.map{|r| r.split(/,/)}.flatten.compact.size
        end
        self.mixin_def_count += 1 if node.is_a?(Sass::Tree::MixinDefNode)
        self.mixin_count += 1 if node.is_a?(Sass::Tree::MixinNode)
      end
      def up(node)
      end
      def down(node)
      end
      def import?(node)
        return false
        full_filename = node.send(:import)
        full_filename != Compass.deprojectize(full_filename)
      end
    end
    class CssFile
      attr_accessor :path, :css
      attr_accessor :selector_count, :prop_count
      def initialize(path)
        require 'css_parser'
        self.path = path
        self.css = CssParser::Parser.new
        self.css.add_block!(contents)
        self.selector_count = 0
        self.prop_count = 0
      end
      def contents
        @contents ||= File.read(path)
      end
      def lines
        contents.inject(0){|m,c| m + 1 }
      end
      def analyze!
        css.each_selector do |selector, declarations, specificity|
          sels = selector.split(/,/).size
          props = declarations.split(/;/).size
          self.selector_count += sels
          self.prop_count += props
        end
      end
    end
    class SassFile
      attr_accessor :path
      attr_reader :visitor
      def initialize(path)
        self.path = path
      end
      def contents
        @contents ||= File.read(path)
      end
      def tree
        opts = Compass.configuration.to_sass_engine_options
        opts[:syntax] = path[-4..-1].to_sym
        @tree = Sass::Engine.new(contents, opts).to_tree
      end
      def visit_tree!
        @visitor = StatsVisitor.new
        tree.visit_depth_first(@visitor)
        @visitor
      end
      def analyze!
        visit_tree!
      end
      def lines
        contents.inject(0){|m,c| m + 1 }
      end
      def rule_count
        visitor.rule_count
      end
      def prop_count
        visitor.prop_count
      end
      def mixin_def_count
        visitor.mixin_def_count
      end
      def mixin_count
        visitor.mixin_count
      end
    end
  end
end
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