Option? to ignore semver metadata after `_`

[pefeigl]

Hello!

We're trying to skopeo sync oci artifacts for use with helm. They are versioned according to semver, but also contain metadata (after the + character, which helm changes to an underscore _, see https://helm.sh/docs/chart_best_practices/conventions/#version-numbers). We've tried to use skopeo sync in combination with images-by-semver: to copy these, but skopeo does not actually find the version numbers that contain metadata after a _.

Is there any way to make this work, or will we need to remove the metadata from the semver version?

Thanks for any help with this, greetings,
Peter

[mtrmac]

Thanks for reaching out.

Without an example label I’m just guessing; but the spec says +, not _; https://semver.org does not contain a _ character at all. So I’d expect values with _ are not recognized, and at least right now there is no option for them to be.

[fuero]

It's about Helm's peculiarity of replacing + with _ when dealing with charts:

https://helm.sh/docs/chart_best_practices/conventions/#version-numbers

The text in the source I provided is a little misleading, Helm will also act on the replacement when pushing or pulling.

So in short, Helm treats + and _ the same leaving other tools to pick up where it muddles the spec.

[pefeigl]

I think fuero is refering to the source examples in this issue: renovatebot/renovate#29764

[pefeigl]

As an example, with the following tags in the registry:

1.2.3-1_2024-01-17.7da0fd4
1.2.3-3_2024-01-18.5eceb63
1.2.3-4_2024-03-04.600aa2a
1.2.3_2024-03-04.600aa2a
1.2.3_2024-03-04.bc2e912
1.2.4-2_2024-03-15.a3db0f3
1.2.4-3_2024-03-15.18a741a
1.2.4_2024-03-15.18a741a

helm will use 1.2.3_2024-03-04.bc2e912 for semver =1.2.3.

[github-actions]

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