| github.com/docker/distribution | Package distribution will define the interfaces for the components of docker distribution. |
| github.com/docker/distribution/context | Package context provides several utilities for working with Go's context in http requests. |
| github.com/docker/distribution/digest | |
| github.com/docker/distribution/reference | Package reference is deprecated, and has moved to github.com/distribution/reference. |
| github.com/docker/distribution/registry/storage/cache | Package cache provides facilities to speed up access to the storage backend. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |