Bitness in Vagrant/Ruby

os.rb

module OS
  def OS.windows?
    (/cygwin|mswin|mingw|bccwin|wince|emx/ =~ RUBY_PLATFORM) != nil
  end

  def OS.mac?
   (/darwin/ =~ RUBY_PLATFORM) != nil
  end

  def OS.unix?
    !OS.windows?
  end

  def OS.linux?
    OS.unix? and not OS.mac?
  end
  
  def OS.bitness
    if unix?
      ( 1.size == 8 ) ? 64 : 32
    else windows?
      ENV.has_key?('ProgramFiles(x86)') ? 64 : 32
    end
  end
  
end

Vagrantfile

# -*- mode: ruby -*-
# vi: set ft=ruby :

# require 'rbconfig'
require './os'

# Vagrantfile API/syntax version. Don't touch unless you know what you're doing!
VAGRANTFILE_API_VERSION = "2"

Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
  host_os_bitness = OS.bitness
  if host_os_bitness == 64
    railo_installer_download_url = "http://www.getrailo.org/railo/remote/download42/4.2.1.000/tomcat/linux/railo-4.2.1.000-pl2-linux-x64-installer.run"
  else
    railo_installer_download_url = "http://www.getrailo.org/railo/remote/download42/4.2.1.000/tomcat/linux/railo-4.2.1.000-pl2-linux-installer.run"
  end
end