Empty folders, #git, & #unity3d don't mix. Git doesn't track empty folders, why does @Unity3D?

code.rb

module BasicUnity

  class Code < Thor
    namespace :code
    include Thor::Actions

    desc "prune", "Remove empty folders and Unity meta files that point to empty folders"
    method_option "dry-run", :type => :boolean, :desc => "Show what will happen but don't 'rmdir' or 'rm'"
    def prune(folder=nil)
      # bash version, requires GNU find
      #
      # dry-run
      #     cmd = "find ./Assets -type d -empty -exec echo '{}' \; -exec echo '{}.meta' \;"
      #     run(cmd)
      #
      # for real
      #     cmd = "find ./Assets -type d -empty -exec rmdir '{}' \; -exec rm '{}.meta' \;"
      #     run(cmd)
      #
      folder = ASSETS_FOLDER unless folder
      Dir.glob(File.join(folder, "**", "*")).select do |d|
        File.directory?(d)
      end.reverse_each do |d|
        if ((Dir.entries(d) - %w[ . .. ]).empty?)
          puts d
          Dir.rmdir(d) unless options["dry-run"]
          meta = "#{d}.meta"
          if File.exist?(meta)
            puts meta
            File.delete(meta) unless options["dry-run"]
          end
        end
      end
    end
    
  end
end