Vagrantfile that installs the latest version of Puppet into the official Ubuntu 12.04 Vagrant image. Also opens up port 5000 (default Foreman port).

Vagrantfile

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

VAGRANTFILE_API_VERSION = "2"

$script = <<SCRIPT
INITIAL_PROVISION=/var/cache/initial_provision

DISTRIB_CODENAME=$(lsb_release --codename --short)
DEB="puppetlabs-release-${DISTRIB_CODENAME}.deb"

if [ ! -e $INITIAL_PROVISION ]
then
    sudo apt-get update
    sudo apt-get install --yes language-pack-en

    sudo apt-get remove --yes puppet*

    wget -q http://apt.puppetlabs.com/$DEB
    sudo dpkg -i $DEB

    rm -f $DEB

    sudo apt-get update
    sudo apt-get install --yes puppet

    sudo puppet module install puppetlabs/apt

    sudo touch $INITIAL_PROVISION
fi
SCRIPT

Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
  config.vm.box = "precise64"
  config.vm.box_url = "http://cloud-images.ubuntu.com/vagrant/precise/current/precise-server-cloudimg-amd64-vagrant-disk1.box"
  config.vm.network :forwarded_port, guest: 5000, host: 5000
  config.vm.hostname = "vagrant.example.com"
  config.vm.provision :shell, :inline => $script
  config.vm.provision :puppet do |puppet|
    puppet.options = "--hiera_config /vagrant/hiera.yaml"
  end
end