Allow setting DeleteBeforeReplace without the need to implement resource.CustomDiff

[danischm]

Hello!

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Issue details

It would be great if we could specify the DeleteBeforeReplace resource behavior without having to implement CustomDiff and therefore having to re-implement the default diff logic.

Affected area/feature

pulumi-go-provider/infer/resource.go

Line 690 in 16913d7

// DeleteBeforeReplace: ???,

[iwahbe]

Hi @danischm. Thanks for opening this issue. I agree that there should be a lighter way to do this then to reimplement Diff.

[danischm]

Hi @iwahbe ! What would be the right approach for this? I am thinking about an annotation at the resource level, something like:

func (c *CustomResource) Annotate(a infer.Annotator) {
	a.DeleteBeforeReplace(&c, true)
}

[iwahbe]

@danischm I think that makes a lot of sense.