Ruby dependency management with Puppet

deps.pp

stage { "pre": before => Stage["main"] }
class pre {
	package {
		"build-essential": ensure => latest;
		"ruby": ensure => "4.5"; # Ruby 1.8.7
		"ruby-dev": ensure => "4.5"; # Ruby 1.8.7
		"rubygems": ensure => "1.3.7-2";
	}
}
class { "pre": stage => "pre" }

package {
	"json":
		ensure   => "1.4.6",
		provider => gem;
	"libmysqlclient-dev":
		ensure => "5.1.49-1ubuntu8";
	"mysql2":
		ensure   => "0.2.6",
		provider => gem,
		require  => Package["libmysqlclient-dev"];
	"nginx":
		ensure => "0.7.67-3ubuntu1";
	"sinatra":
		ensure   => "1.1.0",
		provider => gem;
}

file {
	"/etc/nginx/sites-available/example":
		content => "
server {
	listen 80;
	root /var/www/example;
}
",	  
		ensure  => file;
	"/etc/nginx/sites-enabled/example":
		ensure => "/etc/nginx/sites-available/example";
	"/var/www/example":
		a	  => /foo/,
		b	  => "$bar",
		c	  => $baz,
		ensure => directory;
}