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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'))
# 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
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
abort 'Flay is not available. In order to run flay, you must: gem install flay'
end
end
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