patty.rb、最小限 Chef 実行

patty.rb

require 'tmpdir'
require 'rubygems'
require 'chef/shef/ext'
require 'chef/providers'
require 'chef/resources'
require 'sinatra/base'

class Patty < Shef::StandAloneSession
  def reset!
    loading do
      rebuild_node
      @node = @client.node
      rebuild_context
      @recipe = Chef::Recipe.new(nil, nil, run_context)
    end
  end
end

Chef::Log.level = :debug
BANNER = 'Usage: ruby patty.rb recipe.rb'

def main(args)
  path = args.first or abort BANNER
  File.exists?(path) or abort "File not found: #{path}"

  patty = Patty.instance
  patty.reset!
  patty.recipe.instance_eval File.read(path)

  Dir.mktmpdir do |dir|
    sections = read_sections(path)
    sections.each do |name, content|
      File.open("#{dir}/#{name}", "w") do |f|
        f.write(content.first)
      end
    end
    Dir.chdir dir
    Chef::Runner.new(patty.run_context).converge
  end
end

def read_sections(path)
  Sinatra::Base.inline_templates = path
  Sinatra::Base.templates
end

main(ARGV.dup)

recipe.rb

file '/tmp/hello.txt' do
  content "hello!\n"
end

template "/tmp/hello2.txt" do
  local true
  source "hello"
  variables :name => 'world'
end

template "/tmp/foobar.txt" do
  local true
  source "foobar"
  variables :name => 'tily'
end

__END__
@@ hello
hello, <%= @name %>
@@ foobar
this is another template: name is <%= @name %>