This talk will introduce learnings from Facebook’s first explorations using Kotlin Compiler Plugins. Kotlin Compiler Plugins are a powerful tool that can transform your source code inline, and we will provide step-by-step code instruction on how.

Kotlin Compiler Plugins, though powerful, aren’t broadly used yet due to lack of documentation and the difficulty of manipulating bytecode. Our talk will explain not only how to write a Compiler Plugin, but also how to easily parse and transform source code as text and avoid the difficulties of working with bytecode. We hope by showing these techniques more engineers will be able to unlock the power of Kotlin Compiler Plugins.