# File lib/puppet/module/tool/applications/checksummer.rb, line 11
      def run
        if metadata_file.exist?
          sums = Checksums.new(@path)
          (metadata['checksums'] || {}).each do |child_path, canonical_checksum|
            path = @path + child_path
            if canonical_checksum != sums.checksum(path)
              say child_path
            end
          end
        else
          abort "No metadata.json found."
        end
      end