Support chartRef for flux HelmRelease

[ssams]

Tell us more.

Current Flux documentation suggests using "chart reference" in HelmRelease objects: https://fluxcd.io/flux/guides/helmreleases/#using-a-chart-reference

For this there are two options. First once can reference an OCIRepository in which case everything works nicely with Renovate as the OCIRepository itself contains the version, and Renovate will support this already.

However, the second option is to reference a HelmChart: https://fluxcd.io/flux/components/helm/helmreleases/#helmchart-reference-example

In this case there is another indirection which is currently not supported by Renovate. First the HelmChart needs to be determined which contains the current version, and then from this figure out the HelmRepository which contains the actual remote source. Implementation is likely very similar to the existing lookup of HelmRepository from a sourceRef (

renovate/lib/modules/manager/flux/extract.ts

Lines 135 to 142 in 5cb1078

	const matchingRepositories = helmRepositories.filter(
	(rep) =>
	rep.kind === resource.spec.chart.spec.sourceRef?.kind &&
	rep.metadata.name === resource.spec.chart.spec.sourceRef.name &&
	rep.metadata.namespace ===
	(resource.spec.chart.spec.sourceRef.namespace ??
	resource.metadata?.namespace),
	);

)

[github-actions[bot]]

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