Files.copy(file, manifest)
                        }
                    }
                    return FileVisitResult.CONTINUE
                }

                override fun visitFileFailed(file: Path?, exc: IOException?) =
                    FileVisitResult.TERMINATE

                override fun postVisitDirectory(dir: Path?, exc: IOException?) =
                    FileVisitResult.CONTINUE

                    deleteFiles();
                }
            }
            return FileVisitResult.CONTINUE;
        }

        @Override
        public FileVisitResult visitFileFailed(final Path file, final IOException e) throws IOException {
            if (e != null) {
                logger.warn("I/O exception on {}", file, e);
            }
            return FileVisitResult.CONTINUE;