No support for --kube-version to set .Capabilities.KubeVersion.Version

[scarby]

Seemingly helm diff lacks support for any way of specifying which kube-version is in use, it also doesn't honor the version used on the server or client.

desired functionality:

helm diff upgrade --kube-version 1.22.4

should allow the use of:

{{- if semverCompare ">= 1.19.0" $.Capabilities.KubeVersion.Version }}

at present $.Capabilities.KubeVersion.Version seems to be null

[mumoshu]

@scarby Hey! Thanks for reporting. I think Capabilities.KubeVersion is deprecated and every chart relying on it should migrate to use Capabilities.ApiVersions.Has instead. Also, there's no programmatic way to let helm template (which we relies on in the no-three-way-merge mode) use arbitrary Capabilities.KubeVersion so what you asked is actually impossible.

Probably we'd better add support for --api-versions, same as helm template. Then you'd migrate your chart to use ApiVersions.Has. Does that sound good to you?

[mumoshu]

@scarby BTW... are you still using Helm 2? I think it's EOLed in 2020 and --kube-version was available only in helm-template for helm v2.