Imports
- github.com/docker/distribution/registry/api/errcode
- github.com/docker/docker/autogen/dockerversion
- github.com/docker/docker/pkg/archive
- github.com/docker/docker/pkg/fileutils
- github.com/docker/docker/pkg/stringid
- github.com/docker/docker/pkg/symlink
- github.com/docker/docker/pkg/urlutil