# File lib/buildr/java/packaging.rb, line 58
          def from_zip(file)
            Zip::ZipInputStream::open(file.to_s) do |zip|
              while (entry = zip.get_next_entry)
                if entry.name == 'META-INF/MANIFEST.MF'
                  return Manifest.parse zip.read
                end
              end
            end
            Manifest.new
          end