"Downloaded empty artifact" when oras pull from docker.io

[codewithcheese]

Hey all, I was expecting to be able to pull a docker hub image using ORAS CLI.

oras pull docker.io/library/ubuntu:latest

results in:

Downloaded empty artifact
Pulled docker.io/library/ubuntu:latest
Digest: sha256:b6b83d3c331794420340093eb706a6f152d9c1fa51b262d9bf34594887c2c7ac

With no image on disk, I would expect it to write a tar like any other mime type.

I am writing a TypeScript client to push/pull images AND artifacts and would prefer to only have a single implementation using oras for all the mime types. Don't necessarily need docker hub support, simply using it for testing an image pull.

[qweeah]

ORAS v0.13.0 cannot be used to download an image. It will only download layers annotated with OCI image title

[shizhMSFT]

As @qweeah has mentioned, the current oras CLI can only pull named artifacts.

In the future version of oras, we will support oras copy from a remote registry to a local OCI store or a tarball in OCI layout.

[FeynmanZhou]

As @qweeah has mentioned, the current oras CLI can only pull named artifacts.

In the future version of oras, we will support oras copy from a remote registry to a local OCI store or a tarball in OCI layout.

Is it corresponding to this feature request?

[shizhMSFT]

@FeynmanZhou Yes, exactly.

[qweeah]

Closing as it's already supportted in oras cp.

[qweeah]

@codewithcheese You may build from main branch and try below commands to download a image to the downloaded folder in current working directory

oras cp docker.io/library/ubuntu:latest --to-oci-layout downloaded

This feature will be included in oras 1.0.0-rc.1 release planned for end of Jan 2023.