Apply librarian-chef's cookbook versions to a Chef environment

Rakefile

require "ridley"
require "librarian/chef"

Celluloid.logger = nil

namespace :chef do
  desc "Apply cookbook verions from librarian-chef's lockfile to a chef environment"
  task :apply, :environment do |t, args|
    write_chef_environment(args.environment, librarian_locked_verions)
  end

  def librarian_locked_verions
    versions = {}
    e = Librarian::Chef::Environment.new
    e.lock.manifests_index.each do |dep|
      versions[dep[0]] = "= #{dep[1].version.to_s}"
    end
    return versions
  end

  def write_chef_environment(env, versions)
    Ridley.open(server_url:   ENV['CHEF_SERVER_URL'],
                client_name:  ENV['CHEF_USER_NAME'],
                client_key:   ENV['CHEF_CLIENT_KEY'],
                ssl: {verify: false}) do |connection|
      environment = connection.environment.find(env)
      raise EnvironmentNotFound.new(name) if environment.nil?

      environment.cookbook_versions = versions
      environment.save
    end
  end
end