Support generic GitRepoUpdate mechanism

[akselleirv]

I have my configuration file written in CUE which describes which "addons" or helm charts which should be deployed to a cluster. The version of the helm chart is specified within this custom structure.

For example:

package clusters

cluster: "p-my-cluster": {
	environment:     "prod"

	addon: {
		"ingress_nginx":  {
			values: "0.1.0": { 
				hello: "world"
			}
		}
	}
}

When I want to do a promotion I need to update the version in cluster."p-my-cluster".addon."ingress_nginx".values:

package clusters

cluster: "p-my-cluster": {
	environment:     "prod"

	addon: {
		"ingress_nginx":  {
			values: "0.2.0": { 
				hello: "world"
			}
		}
	}
}

The GitRepoUpdate config only supports Kustomize and Helm, however, I want to update this custom structure.

Suggestions:

1. Use a regex and do a replacement of the match. This can be a bit flaky.
2. Use a plugin system which allows for other custom ways of updating a file stored in Git.

[akselleirv]

I just found issue #424. Closing this one

[krancour]

Re-opening per this comment

[github-actions]

This issue has been automatically marked as stale because it had no activity for 90 days. It will be closed if no activity occurs in the next 30 days but can be reopened if it becomes relevant again.