metric_fu.rake

require 'rake'
namespace :metrics do
  desc "Generate all metrics reports"
  task :all do
    MetricFu::Configuration.run {}
    MetricFu.metrics.each {|metric| MetricFu.report.add(metric) }
    MetricFu.report.save_output(MetricFu.report.to_yaml,
                                MetricFu.base_directory, 
                                'report.yml')
    MetricFu.report.save_templatized_report
    if MetricFu.report.open_in_browser?
      MetricFu.report.show_in_browser(MetricFu.output_directory)
    end
  end
  
  desc "Generates aggregated metrics by file on CSV format"
  task :csv => [:all] do
    require 'yaml'
    require 'csv'
    generate_csv(File.join(MetricFu.base_directory, 'metrics.csv'))
  end
end

def generate_csv(out)
  metrics = YAML.load_file(File.join(MetricFu.base_directory, 'report.yml'))

  aggregated_results = {}

  metrics[:rcov].each_pair do |filename, v|
    next if filename == :global_percent_run
    aggregated_results[filename] ||= {}
    aggregated_results[filename][:coverage] = v[:percent_run]
  end if metrics[:rcov]

  metrics[:flog][:pages].each do |k, v|
    filename = k[:path].sub(/^\//, '')
    aggregated_results[filename] ||= {}
    aggregated_results[filename][:flog_total] = k[:score] 
    aggregated_results[filename][:flog_methods] = k[:scanned_methods].length 
    aggregated_results[filename][:flog_average] = k[:average_score] 
    aggregated_results[filename][:flog_highest] = k[:highest_score] 
  end if metrics[:flog]

  metrics[:saikuro][:files].each do |k, v|
    filename = k[:path].sub(/.*\/scratch\/saikuro\//, '')
    filename = filename.sub(/_cyclo\.html$/, '')
    complexity = 0.0
    size = 0
    k[:classes].each do |klass|
      complexity += klass[:complexity]
      size += klass[:lines]
    end
    aggregated_results[filename] ||= {}
    aggregated_results[filename][:complexity] = complexity
    aggregated_results[filename][:size] = size
  end if metrics[:saikuro]
  
  metrics[:flay][:matches].each do |dup_match|
    score = dup_match[:reason].match(/mass.*= (\d+)/)[1].to_i rescue 0
    dup_match[:matches].each do |file|
      filename = file[:name]
      aggregated_results[filename][:flay] ||= 0
      aggregated_results[filename][:flay] += score
    end
  end if metrics[:flay]

  outfile = File.open(out, 'wb')
  now = DateTime.now
  CSV::Writer.generate(outfile) do |csv|
    csv << ['Filename', 'Date', 'Size', 'Complexity', 'Coverage', 'Flog total', 'Flog methods', 'Flog average', 'Flog highest', 'Flay']
    aggregated_results.each do |filename, metrics|
      csv << [filename, now.strftime('%d/%m/%Y'), metrics[:size], metrics[:complexity], (metrics[:coverage] || 0), (metrics[:flog_total] || 0), (metrics[:flog_methods] || 0), (metrics[:flog_average] || 0), (metrics[:flog_highest] || 0), (metrics[:flay] || 0)]
    end
  end
rescue Errno::ENOENT
  raise "report.yml file not found. Try running rake metrics:all before running this script"
ensure
  outfile.close if outfile
end