Gratatouille: metaprogramming for your build-logic

Transcript

1. Gratatouille Webinar - Apr 2024
2. Hi 👋 🥐
3. apollographql/apollo-kotlin
4. Automatic code generation 4 query.graphql schema.graphqls Kotlin
5. Codegen 5 { sessions { nodes { language title startsAt speakers { name } } } } class Session(val nodes: List<Node>) class Node( val language: String, val title: String, val startsAt: DateTime, val speakers: List<Speaker> ) class Speaker(val name: String)
8. Classloaders 8 • Several ones ◦ root project classloader ◦ subproject classloader ◦ buildSrc classloader • See Crash course in classloaders
10. 10 Yes, BUT… johnrengelman/shadow
11. 11 Yes, BUT… • Slow to compile • Duplicates bytecode • Doesn’t fix everything GradleUp/Gr8 🐘🆙
12. Other things 12 • Overlapping outputs • Build cache • Path sensitivity • Manual serialization • Parallel execution • Optional/nullable ⁉ • Type safety
13. Entering Gratatouille Even more classloaders… ;-)
14. Live demo?
15. Status 15 • Mostly proof of concept • Branch of Apollo working with it • Single artifact mode • Testing