module ParallelTest::CLI

def self.parse_options!(argv)
  options = {}
  OptionParser.new do |opts|
    opts.banner = <<BANNER
all tests in parallel, giving each process ENV['TEST_ENV_NUMBER'] ('', '2', '3', ...)
ional] Only run selected files & folders:
parallel_test test/bar test/baz/xxx_text.rb
ons are:
ER
    opts.on("-n [PROCESSES]", Integer, "How many processes to use, default: available CPUs") { |n| options[:count] = n }
    opts.on("-p", '--pattern [PATTERN]', "run tests matching this pattern") { |pattern| options[:pattern] = /#{pattern}/ }
    opts.on("--group-by [TYPE]", <<-TEXT
p tests by:
      found - order of finding files
      steps - number of cucumber steps
      default - runtime or filesize

|type| options[:group_by] = type.to_sym }
    opts.on("-m [FLOAT]", "--multiply-processes [FLOAT]", Float, "use given number as a multiplier of processes to run") { |multiply| options[:multiply] = multiply }
    opts.on("-s [PATTERN]", "--single [PATTERN]", "Run all matching files in only one process") do |pattern|
      options[:single_process] ||= []
      options[:single_process] << /#{pattern}/
    end
    opts.on("-e", '--exec [COMMAND]', "execute this code parallel and with ENV['TEST_ENV_NUM']") { |path| options[:execute] = path }
    opts.on("-o", "--test-options '[OPTIONS]'", "execute test commands with those options") { |arg| options[:test_options] = arg }
    opts.on("-t", "--type [TYPE]", "test(default) / rspec / cucumber") { |type| options[:type] = type }
    opts.on("--non-parallel", "execute same commands but do not in parallel, needs --exec") { options[:non_parallel] = true }
    opts.on("--chunk-timeout [TIMEOUT]", "timeout before re-printing the output of a child-process") { |timeout| options[:chunk_timeout] = timeout.to_f }
    opts.on('-v', '--version', 'Show Version') { puts ParallelTests::VERSION; exit }
    opts.on("-h", "--help", "Show this.") { puts opts; exit }
  end.parse!(argv)
  raise "--group-by found and --single-process are not supported" if options[:group_by] == :found and options[:single_process]
  options[:files] = argv
  options
end