Experiment with using findReferencedIdentifiers to avoid extra aggressive DCE

[EskiMojo14]

this is pretty messy currently, but the idea based on pcattori/babel-dead-code-elimination#34 (comment) is to find some way of getting the referenced identifiers before Start does any transformations, so it can use them when doing dead code elimination. this would mean that the only dead code that gets eliminated is any that wasn't there before Start.

I also have no idea how to test that a server side effect happened in Playwright, so that'll be a fun hurdle to cross.

from research i have basically found two "accepted" ways of communicating between plugins:

• attaching things to options in one plugin and getting them out in the other
• exposing methods on one plugin and finding the plugin from the other using buildStart

This PR currently uses the first, because buildStart seems to be receiving an empty object in my tests.

[nx-cloud]

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☁️ Nx Cloud last updated this comment at 2025-01-12 21:06:46 UTC

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