Is there any guidance or example project for how to use KSP2? All I could find is <https://android-d...

# ksp

[David Herman]

Is there any guidance or example project for how to use KSP2? All I could find is https://android-developers.googleblog.com/2023/12/ksp2-preview-kotlin-k2-standalone.html which only feels like it scratches the surface and left me with so many questions as to how to proceed.

[David Herman]

val kspConfig = KSPJvmConfig.Builder().apply {
  // All configurations happen here.
}.build()
val exitCode = KotlinSymbolProcessing(kspConfig, listOfProcessors, kspLoggerImpl).execute()

☝️ from the post. Where does this code even go? What does my build.gradle.kts file look like? What does migrating from KSP to KSP2 look like?

[Ting-Yuan Huang]

If you're using KSP's Gradle plugin, just set the Gradle property ksp.useKSP2 to true and use it as if it was KSP1.

To use KSP2 without KSP's Gradle plugin, e.g., without the ksp(some_processor) dependencies, you'll only need implementation("com.google.devtools.ksp:symbol-processing-aa-embeddabe:<version>") in build.gradle.kts. The val kspConfig... snippet is placed in your main or test entry points. For example, you'll need to setup sourceRoots and javaSourceRoots to tell KSP where to find the source files, and kotlinOutputDir to write generated Kotlin files. Here are a few examples that fill up the config and calls KSP:
1. KSP's test code
2. KSP's Gradle plugin. This one creates a clean classpath and is a bit complicated.

[David Herman]

Thanks! It might be good to document this in the project README or blog post maybe?

[Ting-Yuan Huang]

Yes, and we should have done it a couple of months ago 😢 I'll try my best to do it next week.

[David Herman]

Appreciate it!