//noinspection IOStreamConstructor
                    try (InputStream input = new FileInputStream(file)) {
                        BuildCacheLoadResult metadata = doUnpack(entity, input);
                        context.setResult(new UnpackOperationResult(metadata.getArtifactEntryCount()));
                        return metadata;
                    }
                }

	if vflag > 1 {
		errprintf("cp %s %s\n", src, dst)
	}
	writefile(readfile(src), dst, flag)
}

// dopack copies the package src to dst,
// appending the files listed in extra.
// The archive format is the traditional Unix ar format.
func dopack(dst, src string, extra []string) {
	bdst := bytes.NewBufferString(readfile(src))
	for _, file := range extra {
		b := readfile(file)