quality.rake

# extracted from marty andrew's presentation on ruby static code analysis
# http://www.slideshare.net/martin_j_andrews/code-quality-analysis

require 'flog'
require 'flay'
require 'roodi'
require 'roodi_task'
require 'metric_fu'

desc "Analyze for code complexity"
task :flog do
  flog = Flog.new
  flog.flog_files ['app', 'lib']
  threshold = 40
  
  bad_methods = flog.totals.select do |name, score|
    score > threshold
  end
  bad_methods.sort { |a,b| a[1] <=> b[1] }.each do |name, score|
    puts "%8.1f: %s" % [score, name]
  end
  
  raise "#{bad_methods.size} methods have a flog complexity > #{threshold} unless bad_methods.empty?"
end

desc "Analyze for code duplication"
task :flay do
  threshold = 25
  flay = Flay.new({:fuzzy => false, :verbose => false, :mass => threshold})
  flay.process(*Flay.expand_dirs_to_files(['app']))
  
  flay.report
  
  raise "#{flay.masses.size} chunks of code have a duplicate mass > #{threshold}" unless flay.masses.empty?
end

RoodiTask.new 'roodi', ['app/**/*.rb', 'lib/**/*.rb']

task :quality => [:flog, :flay, :roodi, 'metrics:all']