Commit cb6f002350 implemented a generic
Manifest interface to represent manifests in the registry and remove
references to schema specific manifests.
As part of this refactor, the Describable interface was introduced,
which allowed for a single ManifestBuilder interface to handle both
schema1 and schema2 manifests. Implementations of Describable are
generally objects which can be described, not simply descriptors, but
for convenience, this interface was also implemented on Descriptor in
2ff77c00ba.
This interface served its purpose, but no longer needed for most cases;
schema2 (and OCI) descriptors do not need this method, making it only
needed for `schema1.Reference`, which is now deprecated.
Requiring this interface to be implemented limits interoperability
between distribution's Descriptor and the OCI Descriptor types, which
are identical in every other way, except for the presence of the
Describable interface.
This patch:
- Removes the `Descriptor.Descriptor()` method (no longer implementing
the `Describable` interface).
- Updates ManifestBuilder interface and implementations to accept either
- Updates ManifestBuilder interface and implementations to accept a
`Descriptor`.
After this patch, the caller is responsible for changing a describable
type into a descriptor;
builder.AppendReference(describable.Descriptor())
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Defining an interface on the implementer side is generally not best
practice in Go code. There is no code in the distribution module which
consumes a ManifestBuilder value so there is no need to define the
interface in the distribution module. Export the concrete
ManifestBuilder types and modify the constructors to return concrete
values.
Co-authored-by: Sebastiaan van Stijn <github@gone.nl>
Signed-off-by: Cory Snider <csnider@mirantis.com>
Go 1.13 and up enforce import paths to be versioned if a project
contains a go.mod and has released v2 or up.
The current v2.x branches (and releases) do not yet have a go.mod,
and therefore are still allowed to be imported with a non-versioned
import path (go modules add a `+incompatible` annotation in that case).
However, now that this project has a `go.mod` file, incompatible
import paths will not be accepted by go modules, and attempting
to use code from this repository will fail.
This patch uses `v3` for the import-paths (not `v2`), because changing
import paths itself is a breaking change, which means that the
next release should increment the "major" version to comply with
SemVer (as go modules dictate).
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
OCI Image manifests and indexes are supported both with and without
an embeded MediaType (the field is reserved according to the spec).
Test storing and retrieving both types from the manifest store.
Signed-off-by: Owen W. Taylor <otaylor@fishsoup.net>
