argocd: OCI chart targetRevision containing a digest is rejected as invalid-value

[ribbybibby]

How are you running Renovate?

Self-hosted Renovate CLI

Which platform you running Renovate on?

GitHub.com

Which version of Renovate are you using?

44.11.1

Please tell us more about your question or problem

Minimal reproduction repo: https://github.com/ribbybibby/renovate-argocd-oci-digest-repro

The argocd manager doesn't seem to support updating targetRevision for an OCI helm chart when it is set to, or includes, a digest.

As mentioned in the ArgoCD docs, digest is a supported value for targetRevision:

Use this field to specify the desired image tag or digest.

So I would expect Renovate to support updating it.

Example argocd-application.yaml with just digest:

apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: grafana
spec:
  source:
    repoURL: oci://ghcr.io/grafana/helm-charts
    chart: grafana
    targetRevision: sha256:3d75dc3173c3fb07eaa8853283f38558c7c27259f7ed00cf8c096173667426a1

Example argocd-application.yaml with both tag and digest:

apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: grafana
spec:
  source:
    repoURL: oci://ghcr.io/grafana/helm-charts
    chart: grafana
    targetRevision: 10.5.15@sha256:3d75dc3173c3fb07eaa8853283f38558c7c27259f7ed00cf8c096173667426a1

Relevant skip log:

DEBUG: Dependency ghcr.io/grafana/helm-charts/grafana has unsupported/unversioned value sha256:3d75dc3173c3fb07eaa8853283f38558c7c27259f7ed00cf8c096173667426a1 (versioning=docker)
DEBUG: Skipping ghcr.io/grafana/helm-charts/grafana because no currentDigest or pinDigests

Extracted dep:

{
  "depName": "ghcr.io/grafana/helm-charts/grafana",
  "currentValue": "sha256:3d75dc3173c3fb07eaa8853283f38558c7c27259f7ed00cf8c096173667426a1",
  "datasource": "docker",
  "packageName": "ghcr.io/grafana/helm-charts/grafana",
  "versioning": "docker",
  "skipReason": "invalid-value",
  "updates": []
}

Logs (if relevant)

Logs

DEBUG: Dependency ghcr.io/grafana/helm-charts/grafana has unsupported/unversioned value sha256:3d75dc3173c3fb07eaa8853283f38558c7c27259f7ed00cf8c096173667426a1 (versioning=docker)
DEBUG: Skipping ghcr.io/grafana/helm-charts/grafana because no currentDigest or pinDigests