Treat `Schema.ForceNew == true` attributes as immutable once set

[ulucinar]

What problem are you facing?

Because we set the prevent_destroy lifecycle meta-argument, if a Terraform configuration argument with Schema.ForceNew set to true in its schema is modified, terraform plan calls fail complaining about the prevent_destroy arg.

How could Terrajet help solve your problem?

Because to adhere to XRM we set the prevent_destroy lifecycle meta-argument, with the introduction of validating admission webhooks in Crossplane, we can consider using the ForceNew schema to prevent modification of such parameters once they are set.

[muvaf]

https://github.com/crossplane/crossplane-tools/issues/40 should help when it's implemented.

[stale[bot]]

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