Make it easier to specify a directory's contents in a Berksfile for test-kitchen

cookbook_helper.rb

# Scan a directory in the gitroot for cookbook directories
def cookbook_search(book_directory, exclusions=[])
  git_root = %x[ git rev-parse --show-toplevel ].chomp

  Dir.entries("#{git_root}/#{book_directory}")
    .reject { |i| %w(. ..).include?(i) }
    .select { |i| File.directory?(File.join("#{git_root}/#{book_directory}", i)) }
    .each do |cb|
    if cb != File.basename(Dir.pwd) # Don't add an entry for ourself or Berks will error
      if not exclusions.include?(cb)
        if File.exists?("#{git_root}/#{book_directory}/#{cb}/metadata.rb")
          cb_name = %x[ grep '^name' #{git_root}/#{book_directory}/#{cb}/metadata.rb].chomp.split[1].tr("'",'').tr('"','')
          cookbook cb_name, path: "#{git_root}/#{book_directory}/#{cb}"
        end
      end
    end
  end
end

from jamescarr on hangops