Vagrant com provisionamento via Ruby code

provision.rb

#!/opt/vagrant_ruby/bin/ruby

module Shell
  def apt_get(cmd, param="")
    sys_call "apt-get #{cmd.to_s} #{param}"
  end

  def curl(url)
    sys_call "curl #{url}"
  end

  private

  def sys_call(cmd)
    system cmd
  end
end

class Packages
  include Shell

  def initialize(packages)
    @packages
  end

  def install
    puts "installing packages"
    apt_get :update
    apt_get :install, @packages
    puts "installing packages.. done"
  end
end

class RVM
  include Shell

  def install
    puts "installing rvm"
    curl "-L https://get.rvm.io | bash -s stable --auto-dotfiles --ruby"
    puts "installing rvm.. done"
  end
end

Packages.new("build-essential git vim nmap").install
RVM.new.install

Vagrantfile

Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
  config.vm.provision "shell", path: "provision.rb"
end