[Suggestion] Resource Diff Printer

[10000-ki]

Idea

I'd like to propose an idea. How about providing a utility function that outputs the diff information to show which fields have changed between the actual resource and the desired resource?

Currently, it seems that such a feature doesn't exist, so when unintended events are generated, we have to log both the actual and desired resources as text and manually compare them field by field to find the differences. This process takes too much time.

Example

    override fun match(
        actualResource: StatefulSet,
        desired: StatefulSet,
        primary: OpenSearch,
        context: Context<OpenSearch>,
    ): Matcher.Result<StatefulSet> {
        println(ResourceDiffPrinter.printDiff(actualResource, desired))
    }

---

"""
Diff : 
(actual) -> (desired)
annotations.last-modification-timestamp: "2024-08-13T11:07:04+09:00" -> annotations.last-modification-timestamp: "2024-08-13T12:07:04+09:00" 
spec.replicas: "3" -> spec.replicas: "4"
"""

[csviri]

Would make sense IMO, I can imagine that as part of SSABasedGenericKubernetesResourceMatcher, that could also log this information.

Do you plan to also create a PR?

[10000-ki]

Do you plan to also create a PR?

@csviri Of course! In that case, would it be okay if I work on it and then submit a PR?

[csviri]

sure, pls do! thx!

[10000-ki]

@csviri the PR should be created based on the next branch right??

[metacosm]

@csviri the PR should be created based on the next branch right??

Yes, please.