Contents

# encoding: utf-8

namespace :metrics do
  require 'flay'

  project = Devtools.project
  config  = project.flay

  # Original code by Marty Andrews:
  # http://blog.martyandrews.net/2009/05/enforcing-ruby-code-quality.html
  desc 'Measure code duplication'
  task :flay do
    threshold   = config.threshold
    total_score = config.total_score
    files       = Flay.expand_dirs_to_files(config.lib_dirs).sort

    # Run flay first to ensure the max mass matches the threshold
    flay = Flay.new(fuzzy: false, verbose: false, mass: 0)
    flay.process(*files)
    flay.analyze

    masses = flay.masses.map do |hash, mass|
      Rational(mass, flay.hashes[hash].size)
    end

    max = (masses.max || 0).to_i
    unless max >= threshold
      Devtools.notify_metric_violation "Adjust flay threshold down to #{max}"
    end

    total = masses.inject(:+).to_i
    unless total == total_score
      Devtools.notify_metric_violation "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)
    flay.analyze

    mass_size = flay.masses.size

    if mass_size.nonzero?
      flay.report
      Devtools.notify_metric_violation "#{mass_size} chunks have a duplicate mass > #{threshold}"
    end
  end
end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
devtools-0.1.2	tasks/metrics/flay.rake
devtools-0.1.1	tasks/metrics/flay.rake
devtools-0.1.0	tasks/metrics/flay.rake