require "Spaceship"

file = 'RemoteBuildNumber'

user = ARGV[0]
pass = ARGV[1]
appid = ARGV[2]
version = ARGV[3]

File.delete(file) if File.exist?(file)

Spaceship::Tunes.login(user, pass)

app = Spaceship::Tunes::Application.find(appid)

train = app.build_trains[version]
build = train.first # Array first is the last new build

File.write(file, build.build_version)