Add support for docker-archive: to skopeo list-tags

[guanxingfeng]

command: skopeo inspect docker-archive:/root/busybox.tar
{
"Digest": "sha256:d8db71d650ed60da14a6c6d46ea1103d253a1117586e846020b82726e71d3b19",
"RepoTags": [],
"Created": "2020-06-29T20:21:41.42102751Z",
"DockerVersion": "18.09.7",
"Labels": null,
"Architecture": "amd64",
"Os": "linux",
"Layers": [
"sha256:50761fe126b6e4d90fa0b7a6e195f6030fe250c016c2fc860ac40f2e8d2f2615"
],
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
]
}

expect display right ,eg "RepoTags":["busybox:latest"]!!

[mtrmac]

Thanks for your report.

Conceptually, skopeo inspect exists to provide information about an image; the way it also provides repository tags, only for docker/distribution registries, does not really generalize (and is often actively unwanted in inspect due to the extra overhead). It’s more or less a historical accident preserved for compatibility, and not something that we want to further enhance.

This functionality would be a good fit for skopeo list-tags, though.

[rhatdan]

@guanxingfeng Does list-tags satify your needs?

[mtrmac]

@rhatdan skopeo list-tags doesn’t currently implement docker-archive:.

[guanxingfeng]

@rhatdan I want to get tags from a image tar，skopeo list-tags doesn’t currently implement docker-archive:

[rhatdan]

Would that change make more sense? Using skopeo list-tags on a docker-archive?

[guanxingfeng]

I wang to implement upload multiple docker tars to image hub using UI，like this，

It will be very useful and convenient to get the image tags automatically instead of manual input.

[github-actions]

A friendly reminder that this issue had no activity for 30 days.

[mtrmac]

FWIW containers/image#991 has built the infrastructure necessary to implement this.

[zhangguanzhang]

FWIW containers/image#991 has built the infrastructure necessary to implement this.

Is there any update for this? I use the latest code, it still not implement this

$ skopeo --version
skopeo version 1.7.0-dev commit: 22d187181b0e92a3290c9e63909c4bde98353ed7
skopeo list-tags  docker-archive:test.tar
FATA[0000] Unsupported transport 'docker-archive' for tag listing. Only 'docker' currently supported

[djpbessems]

I could definitely use this; right now I have to resort to parsing the manifest inside the tarball with jq, this is far from efficient.

[vrothberg]

You can use it with the latest version of Skopeo.

[djpbessems]

Yeah sorry, I did not realise that I'm still stuck on an ancient version; SLES' repository still has 1.4.1.

I'll instead run my commands within the official container image.