script for loading a node from json, expanding the run list and saving.

load_expanded_node.rb

#!/usr/bin/env ruby
# Copyright 2012 Opscode <legal@opscode.com>
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
# 
#   http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
#
# Loads a node from a json file, expands roles + recipes, saves it to the server
#
# 2012-09-27 Initial writeup - Bryan McLellan <btm@opscode.com>

require 'rubygems'
require 'chef/node'
require 'chef/config'
require 'chef/log'
require 'chef/rest'
require 'json'

unless ARGV.length == 2
  puts STDERR, "Missing arguments"
  puts STDERR, "./load_expanded_node.rb .chef/knife.rb node_name.json"

config_file = ARGV[0]
node_file = ARGV[1]

puts "Loading Chef configuration from #{config_file}"
Chef::Config.from_file(config_file)

if File.exists?(node_file)
  puts "Loading node from file #{node_file}"
  node_json = JSON.parse(IO.read("#{node_file}"))
else
  puts STDERR, "Unable to find node file: '#{node_file}'"
  exit 1
end

node = Chef::Node.json_create(node_json)

puts "Expanding run list for #{node.name}"
puts "Current run list: #{node.run_list}"

node.expand!
puts "Expanded recipes: #{node.recipes.inspect}"
puts "Expanded roles: #{node.roles.inspect}"

puts "Saving node"
node.save