iTunesConnect: Receive the app identifier of the next app to be uploaded (Waiting for Upload status), since you can not specify which app you want to deploy next (http://stackoverflow.com/questions/7568420/how-to-perform-ios-app-validation-from-the-command-line#comment23525642_7569194)

get_identifier_to_be_uploaded.rb

# encoding: utf-8

require 'pty'
require 'pry'

command = "xcrun -sdk iphoneos Validation -online -upload -verbose notHere.ipa"
# upload it now: http://stackoverflow.com/questions/7568420/how-to-perform-ios-app-validation-from-the-command-line

output = ''
begin
  PTY.spawn(command) do |stdin, stdout, pid|
    begin
      stdin.each do |line| 
        output += line

        if line.include?"ExistingBundleIdentifier" or line.include?"ReservedBundleIdentifier"
          identifier = line.split('"')[1]
          puts identifier
          exit
        end

        if line.include?"warning: Can't connect to iTunesConnect"
          puts output
          raise "Some error when trying to fetch the app identifier"
        end
      end
    rescue Errno::EIO
      binding.pry
      puts "Errno:EIO error, but this probably just means " +
            "that the process has finished giving output"
    end
  end
rescue PTY::ChildExited
  puts "The child process exited!"
  binding.pry
end