class RSpec::Core::CommandLine

def run(err, out)
  @options.configure(@configuration)
  @configuration.error_stream = err
  @configuration.output_stream ||= out
  @configuration.require_files_to_run
  @configuration.configure_mock_framework
  @world.announce_inclusion_filter
  @configuration.reporter.report(example_count) do |reporter|
    begin
      @configuration.run_hook(:before, :suite)
      example_groups.run_examples(reporter)
    ensure
      @configuration.run_hook(:after, :suite)
    end
  end
  example_groups.success?
end