Runs mutant selectively

mutant.rake

namespace :mutant do

  MUTANT_VERSION = `mutant --version`.strip.split('-').last

  def complete?(log)
    content = File.read(log)
    /Kills:/.match(content)
  end

  def preface(file, base)
    rest = file.sub('app/', '').sub(/(lib)\//, AOT::EMPTY_STRING).sub(base.to_s, AOT::EMPTY_STRING)
    return AOT::EMPTY_STRING if rest == AOT::EMPTY_STRING
    sections = rest.split(AOT::SLASH)
    if sections.size == 1
      segment = sections.first
      segment = 'SIT' if segment == 'Sit'
      if segment.size <= 3
        return (segment.upcase + '::').sub('::::', '::').sub('Agr', "AGR")
      end
    end

    (rest.camelize + '::').sub('::::', '::').sub('Agr', "AGR")
  end

  task :lib do
    require 'fileutils'
    require_relative '../../config/environment.rb'

    begin
      FileList.new('app/lib/**/*.rb',
                   'app/export/**/*.rb',
                   'app/queuer/**/*.rb',
                   'app/worker/**/*.rb',
                   'app/mailers/**/*.rb',
                   'app/import/**/*.rb')
        .sort_by { |x| File.size(x) }.each do |file|
        next if file =~ /shared/ || file =~ /observer/ || file =~ /eradicator/
        parms = ['-r./config/environment.rb']
        parms << '-j6'
        path = Pathname.new(file)
        md5 = Digest::MD5.file(path).hexdigest
        # parms << "-I#{path.dirname}"
        # parms << "-r#{path.basename}"
        parms << '--use rspec'

        base = path.basename.to_s.sub(path.extname, '').camelize

        if base.present?

          parms << preface(file, path.basename) + base

          spec = path.sub('app/', 'spec/').sub('.rb', '_spec.rb')

          md5_spec = Digest::MD5.file(spec).hexdigest

          log_dir = path.dirname.sub('app/', 'log/mutant/')
          log_location = path.sub('app/', 'log/mutant/').sub('.rb', '_')
          log = "#{log_location}#{md5}_#{md5_spec}_#{MUTANT_VERSION}.log"
          FileUtils.mkdir_p(log_dir)
          parms << '> ' + log


          cmd = 'RAILS_ENV=test bundle exec mutant ' + parms.join(AOT::BLANK)
          if Dir.glob(log).empty? || !complete?(log)
            File.delete(Dir.glob("#{log_location}*.log").first) rescue nil
            File.write('/Users/tj/.rspec', "--pattern '#{spec}'")
            puts "[#{Time.now.iso8601}] #{cmd}"
            `#{cmd}`
          end

          if File.exists?(log)
            content = File.read(log)
            if /Mysql2::Error:/.match(content)
              FileUtils.cp(log, '/tmp')
              File.write('/Users/tj/.rspec', "--pattern '#{spec}'")
              cmd2 = cmd.sub('-j6', '-j1')
              puts log
              puts "[#{Time.now.iso8601}] #{cmd2}"
              `#{cmd2}`

            end
          end
        end
      end
    ensure
      File.write('/Users/tj/.rspec', '')
    end
  end
end