SecretTemplate's type cannot be updated

[Samze]

Describe the problem/challenge you have

#66 Introduced the SecretTemplate API. This allows you to define arbitrary input resources that are used to generate a new Kubernetes Secret based on templating.

One of the fields that is available for templating within the Secret is type. Given this field is immutable the question is what should happen if this value changes within the template.

This could change if someone updates the SecretTemplate type field directly .eg. type: foo to type: bar or if they are using templating and the field changes. e.g. type: $(.resource.data.foo).

The current behaviour is that SecretTemplate attempts to update the Secret but fails. A user will have to delete and recreate the SecretTemplate to get the new value.

Describe the solution you'd like
This may not be a huge issue as it's fairly unlikely that type will be a dynamic field. However if someone typos the type field being able to simply update the template would be nice.

So for changes to type we should consider deleting and re-creating the entire secret.

Anything else you would like to add:
More context in this comment #66 (comment)

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[neil-hickey]

Hey @Samze any idea if you have a priority idea on this issue? Or shall I just leave it open until it might get picked up at some point in the future?