What is a working configuration to auto-generate L...

# arrow

[Daniel TIefenauer]

What is a working configuration to auto-generate Lenses when using Arrow's optics? I followed the guide on https://arrow-kt.io/learn/quickstart/#additional-setup-for-plug-ins and added the following to my build.gradle.kts (the version is 1.2.0 and provided through version catalog):

plugins {
    kotlin("jvm") version "1.9.21"
    id("com.google.devtools.ksp") version "1.8.21-1.0.11"
}

dependencies {
    implementation(libs.arrow.optics)
    implementation(libs.arrow.optics.ksp.plugin)
}

I then created some data classes annotated with `@optics`:

@optics data class InsurancePolicy(val policyNumber: String, val insurant: Insurant, val vehicle: Vehicle) {companion object}
@optics data class Insurant(val firstName: String, val lastName: String, val address: Address) {companion object}
@optics data class Vehicle(val make: String, val model: String, val horsePower: Int) {companion object}
@optics data class Address(val street: String, val streetNumber: String, val zip: String, val city: String) {companion object}

but none of the companion object's properties seem to be generated (e.g. InsurandPolicy.insurant is not found)

[Gemy]

If you are using gradle, make sure KSPDebug task is built. (Double check task name, I'm not sure)

[Daniel TIefenauer]

I was missing the following line from the build output:

ksp-1.8.21-1.0.11 is too old for kotlin-1.9.21. Please upgrade ksp or downgrade kotlin-gradle-plugin to 1.8.21.

but even after upgrading to

id("com.google.devtools.ksp") version "1.9.21-1.0.16"

no code seems to be generated

[Daniel TIefenauer]

d'oh! Just noticed my error:

implementation(libs.arrow.optics.ksp.plugin)

should be

ksp(libs.arrow.optics.ksp.plugin)

after fixing this and upgrading the plugin it now works

[Gemy]

Okayy nice 👍