cf-get

#! /usr/bin/env ruby
require "rubygems"
require "bundler/setup"
require "fog"
require "fileutils"
require 'trollop'
require 'yaml'


def set_environment(environment)
	environments[environment]
end

def environments
	YAML::load_file(File.join(File.dirname(File.expand_path(__FILE__)), 'config.yml'))
end

opts = Trollop::options do
	opt :file, "", :type => :string 
	opt :stack, "", :type => :string
	opt :environment, "", :type => :string
end	
Trollop::die :file, "represent a file to write to" unless opts[:file]
Trollop::die :stack, "represent a stack on aws" unless opts[:stack]
Trollop::die :environment, "needs an environment. Valid values(#{environments.keys.join(',')})" unless environments.keys.include? opts[:environment]


settings = set_environment(opts[:environment])

@connection = Fog::AWS::CloudFormation.new(settings)
stack = @connection.get_template opts[:stack]
filename = opts[:file]



 if File.exists?(filename)
 	old_filename = "#{filename}.#{Time.now.to_i.to_s}"
	FileUtils.mv(filename, old_filename)
	puts "old cloudformation: #{old_filename}"
end

File.open(filename, mode= "w+"){|file| file.write(stack.body["TemplateBody"]) }
puts filename