Contents

# encoding: utf-8

PLATFORM = defined?(RUBY_ENGINE) && RUBY_ENGINE || 'ruby'

namespace :metrics do
  if RUBY_VERSION >= '1.9.3' && PLATFORM == 'ruby'
    begin
      require 'flay'
      require 'yaml'

      config      = YAML.load_file(File.expand_path('../../../config/flay.yml', __FILE__)).freeze
      threshold   = config.fetch('threshold').to_i
      total_score = config.fetch('total_score').to_f
      files       = Flay.expand_dirs_to_files(config.fetch('path', 'lib')).sort

      # original code by Marty Andrews:
      # http://blog.martyandrews.net/2009/05/enforcing-ruby-code-quality.html
      desc 'Analyze for code duplication'
      task :flay do
        # run flay once without a threshold to ensure the max mass matches the threshold
        flay = Flay.new(:fuzzy => false, :verbose => false, :mass => 0)
        flay.process(*files)

        max = (flay.masses.map { |hash, mass| mass.to_f / flay.hashes[hash].size }.max) || 0
        unless max >= threshold
          raise "Adjust flay threshold down to #{max}"
        end

        total = flay.masses.reduce(0.0) { |total, (hash, mass)| total + (mass.to_f / flay.hashes[hash].size) }
        unless total == total_score
          raise "Flay total is now #{total}, but expected #{total_score}"
        end

        # run flay a second time with the threshold set
        flay = Flay.new(:fuzzy => false, :verbose => false, :mass => threshold.succ)
        flay.process(*files)

        if flay.masses.any?
          flay.report
          raise "#{flay.masses.size} chunks of code have a duplicate mass > #{threshold}"
        end
      end
    rescue LoadError
      task :flay do
        $stderr.puts 'Flay is not available. In order to run flay, you must: gem install flay'
      end
    end
  else
    task :flay do
      $stderr.puts "Flay is disabled under #{PLATFORM}-#{RUBY_VERSION} since it is not score compatible with other implementations"
    end
  end
end

Version data entries

4 entries across 4 versions & 1 rubygems

Version	Path
yardstick-0.9.6	tasks/metrics/flay.rake
yardstick-0.9.5	tasks/metrics/flay.rake
yardstick-0.9.4	tasks/metrics/flay.rake
yardstick-0.9.3	tasks/metrics/flay.rake