Building a Kotlin Compiler Plugin for Compose Insights

on YouTube ↗37m

" summary

Builds two plugins — a front-end plugin that inspects FIR function calls and enforces a restricted scope annotation on slot lambdas, emitting compiler errors when a composable is not a member of the receiver; and a backend plugin that injects a call to a runtime composition tracker into composable block bodies via IR transformation. Project includes Gradle + CLI plumbing, a runtime library with a CompositionLocal, and UI tests that assert exact recomposition counts (demo shows asserting two recompositions).

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" chapters (10)

1. 0:00Compiler plugins intro
2. 2:28Plugins for large teams
3. 5:13Tool for code analysis
4. 9:03Front-end vs backend plugins
5. 10:06Front-end plugin for Compose slots
6. 18:07Project setup with Gradle
7. 20:11FIR checker for restricted composables
8. 26:31Backend plugin for composition tracking
9. 31:11IR transformer for code injection
10. 36:24Testing and validating plugins

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