Global snapd hook

Hey, are there any snapd hooks that could be used to launch a script after any snap updates?

I am not talking about an individual snap hook, but a global hook that applies to any/all snap updates. This would useful to update system environment variables or perform testing of the system and force a “revert” if something fails.

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I don’t think so, see also Hook to run scripts before and after refresh

@ijohnson totally related, I have commented there. Thanks!