crane: how to copy a sub-set of a image platforms?

[rgl]

How can we copy the images of a manifest list that match a given platform list?

Using crane --all we can copy all the images from a manifest list.

Using crane --platform we can can copy a single image that matches the given singular platform, but how about a sub-set? Something like crane --platform linux/amd64,linux/arm64?

This would be useful for copying a sub-set of the debian:bullseye-slim images (e.g. just the linux/amd64 and linux/arm64 platform images).

[jonjohnsonjr]

This is an interesting idea.

Do you want to copy both images separately to the destination? Or do you want to take the existing manifest list, filter out all the platforms you don't care about, and push a new manifest list with just those two platforms?

We might want to revive #891 and add this to the list of things we'd like to support.

I could see this being a crane copy flag, but it feels like it should probably be a separate command if we're synthesizing new artifacts. Currently, crane copy is a digest-preserving operation (either the index digest or an individual image's digest ends up in the target), and I'd like to keep it that way.

[rgl]

Do you want to copy both images separately to the destination? Or do you want to take the existing manifest list, filter out all the platforms you don't care about, and push a new manifest list with just those two platforms?

The second one :-)

[jonjohnsonjr]

X-ref: containers/skopeo#1511

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[gpsmit]

I would love to have this feature as well.
Today I pushed 5GB worth of windows images when im only interested in linux arm & and images