feat: Flux package manager that can renovate HelmRelease manifests

[danports]

Adds a new flux package manager that parses HelmRelease and HelmRepository manifests. Mostly code adapted from the helmfile, gitlabci, and kubernetes managers. Closes #5984.

• Update docs
• Add unit tests
• Test on a real repository
• Add more tests to achieve 100% code coverage
• Review SkipReason returned when failing to match a HelmRelease to a HelmRepository

This was my first time writing TypeScript, and it was really quite pleasant! 🙂

[rarkins]

Needs some defensive non-null checks added in quite a few places, unless the response is first fully validated to conform to the TS type(s)

[anthr76]

Any chance we can cover a flux kustomization in this PR? It would resolve #12139

[danports]

@anthr76 I read through #12139 but it's not clear to me what needs to be renovated in Kustomization resources. Can you clarify in that issue? I've only used Kustomization manifests at a very basic level in Flux, so perhaps I just haven't run into that use case yet. My preference would be to land this PR and then consider extending the Flux manager in future PRs.

[anthr76]

Sure

Here's a few usecase examples.. Looking back I suppose this is more or less for a gitReository spec

1. https://github.com/anthr76/infra/blob/main/gitops/base/monitoring/kube-prometheus-stack/crds/kustomize.yaml#L9-L17
2. https://github.com/anthr76/infra/blob/ab4463314fe1cca8d5af2b440a30e2281f7ab7ba/gitops/base/database/kubegres/git-repository.yaml#L9-L13
3. https://github.com/anthr76/infra/blob/ab4463314fe1cca8d5af2b440a30e2281f7ab7ba/gitops/base/kube-system/kubelet-serving-cert-approver/kustomize.yaml#L9-L12

I glue these together today with a regex manager https://github.com/anthr76/infra/blob/ab4463314fe1cca8d5af2b440a30e2281f7ab7ba/.github/renovate.json5#L38-L49 basically looking at it's source and updating the git tags most of the time.

[danports]

Got it. I don't currently use GitRepository resources in my Flux repositories so that wouldn't be a priority for me but is certainly something that could be added in a future PR.

[rarkins]

@anthr76 can you create a feature request for the additional features? Either create once this is merged or assume this PR will be merged soon!

[rarkins]

Confusion over extractAllPackageFiles

[viceice]

LGTM, waiting for doc fixes 🤗

[HonkingGoose]

I'm happy with the docs now. 😄

[ChipWolf]

🚀

[renovate-release]

🎉 This PR is included in version 31.35.0 🎉

The release is available on:

• GitHub release
• 31.35.0

Your semantic-release bot 📦🚀

[danports]

How long does it take new builds to make it to Docker Hub? Was hoping to update my GitLab Renovate runner to use this release, but I don't see it on Docker Hub yet.

[rarkins]

Usually a few hours. Keep an eye on the renovatebot/docker-renovate-full repo

[danports]

Awesome, I see the 31.35-slim tag on Docker Hub now. Thanks all for helping to get this PR over the finish line in under a week! 🙂