From 0 to ready in one command. vagrant+packer=the\ future.

Vagrantfile

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

Vagrant.configure("2") do |config|
    config.vm.box = "symfony2"
    config.vm.box_url = "/Users/ash/Projects/packer-templates/symfony2/vmware.box"

    config.vm.hostname = 'stage1'
    config.vm.network :private_network, ip: '192.168.215.42'
    config.vm.synced_folder ".", "/vagrant", :nfs => true

    config.hostmanager.enabled = true
    config.hostmanager.manage_host = true

    config.vm.provision :shell,
        :inline => "if [ -f /vagrant/composer.json ]; then cd /vagrant && composer install; else composer create-project symfony/framework-standard-edition /tmp/symfony 2.3.1; mv /tmp/symfony/* /vagrant; fi"
end