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adding --skip-existing flag to sync #2426
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Thanks for reaching out. The code is already supposed to avoid syncing images that exist on the destination, based on manifest comparison — but that does require reading at least the manifests. Removing even more accesses would require making an assumption, necessarily by user opt-in, that once a tag exists, it is never moved to a different image. And a single global tag is unlikely to be ideal for that, at least because the practice of having a |
We would like to use skopeo for registry syncing, but without support to skipping existing tags in the destination the amount of resulting docker pulls would be too large on a daily basis (our use-case is very simple - daily syncing of images from dockerhub repo to ghcr).
We have tried running it both in dry-run and without and dockerhub rate-limiting is choking it very quickly. Please let me know if there is already an existing work-around!
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