Print iOS console error in After Scenario on failure using Cucumber + Calabash-ios

gistfile1.txt

After do |scenario|
  if(scenario.failed?)
    $stdout.print "\n[Fail] #{scenario.exception.message}\n----------\n"
    system("tail -r -100 \"#{ENV['HOME']}/Library/Logs/iOS Simulator/7.0.3/system.log\" | grep -A1000 Error -i -m1")
    $stdout.print "----------\n"
  end
  unless @calabash_launcher.calabash_no_stop?
    calabash_exit
    if @calabash_launcher.active?
      @calabash_launcher.stop
    end
  end
end