Add layer sizes to buildx imagetools inspect

[ddelange]

Hi 👋

I'd like to use docker manifest inspect -v to sum up layer sizes: https://stackoverflow.com/a/73108928/5511061

However, this command does not currently support OCI manifests. The alternative, docker buildx imagetools inspect --raw, does not include the verbosity needed to sum up layer sizes.

Leaving this here as suggested in docker/build-push-action#764 (comment) and in moby/moby#43126 (comment)

Originally posted by @ddelange in #1509 (comment)

[ddelange]

@jedevc this ticket was not yet included in docker/cli#3990 right? I need to upgrade my Mac OS before I can upgrade Docker to test it myself, hence me asking 😅

[jedevc]

Yeah, this is completely different from that ticket.

The CLI issue is about supporting OCI images in docker manifest, while this one is about adding layer size support into docker buildx imagetools.

The latest release of docker (v23.0) should include the manifest patch, I haven't had a proper look at this one yet 👀

[ddelange]

Thanks for the quick reply! So having image layer sizes for OCI manifests in docker manifest inspect -v would be a different ticket, after this one, to port that over?

[jedevc]

docker manifest inspect -v should get layer sizes for OCI images in v23.0 I think! Unless I implemented something wrong 👀

[ddelange]

Aha awesome! Ok I really need to upgrade my Mac 🙈 thanks again!