anyone added with success some kotlin generated code in a kotlin multiplatform module?

# kotlin-native

[gianluz]

anyone added with success some kotlin generated code in a kotlin multiplatform module?

[gildor]

There is no simple solution, you of course can generate some code before compilation, for example SQLDelight does this for MPP, but you have no access to kapt because it’s JVM only API

[Dominaezzz]

I currently do this in kgl using kotlinpoet. There's no nice way of reading/modifying existing Kotlin code (at least outside the JVM backend). We're sorta waiting for IR to land before anything like that is available.

[gildor]

modifying existing Kotlin code

It’s also impossible on JVM, JSR-269 allows only read existing code and generate new code

[gianluz]

if i’m generating a static configuration class with kotlin poet, there is no possibilities to add this class to the classpath and use this fields? basically i need something that works like the Android BuildConfig

[Dominaezzz]

You can do that easily.

[Dominaezzz]

You just need to generate code into some folder in the build directory and add that folder to you source set.

[gianluz]

this is what i was trying to do :

import gen.BuildConfigGeneratorPlugin

plugins {
    id 'kotlin-multiplatform'
}

apply plugin: BuildConfigGeneratorPlugin

sourceSets {
    generated {
        kotlin.srcDir += "generated/source/main/kotlin"
    }
}

kotlin {
    targets {
        fromPreset(MPPTools.defaultHostPreset(project), 'runner') {
            compilations.main.outputKinds 'EXECUTABLE'
            compilations.main.entryPoint 'com.danger.runner.main'
        }
    }
}

compileKotlinRunner{
    dependsOn(generateBuildConfig)
}

but i’ve got this error:

BUILD FAILED in 0s
Could not get unknown property 'srcDir' for object of type org.jetbrains.kotlin.gradle.dsl.KotlinMultiplatformExtension.

[Dominaezzz]

You'll probably need to look into using buildSrc.

[gianluz]

yes i’m generating the code with a plugin in buildSrc

[Dominaezzz]

Move the sourceSets block into the kotlin block.

[Dominaezzz]

You'll also want to add a source set dependency from runnerMain to generated.

[gianluz]

mmmh how? 😄 now is compiling but the buildconfig is still not resolved

[Dominaezzz]

https://kotlinlang.org/docs/reference/building-mpp-with-gradle.html#connecting-source-sets should help. Can't be arsed to type on my phone 😅.

[gianluz]

unfortunately is still failing:

.BuildConfig
                         ^

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':{moduleName}:compileKotlinRunner'.

here my build.gradle:

import gen.BuildConfigGeneratorPlugin

plugins {
    id 'kotlin-multiplatform'
}

apply plugin: BuildConfigGeneratorPlugin


kotlin {
    sourceSets {
        generated {
            kotlin.srcDirs += "generated/source/main/kotlin"
        }

        runnerMain {
            dependsOn generated
        }
    }
    targets {
        fromPreset(MPPTools.defaultHostPreset(project), 'runner') {
            compilations.main.outputKinds 'EXECUTABLE'
            compilations.main.entryPoint 'com.danger.runner.main'
        }
    }
}

compileKotlinRunner {
    dependsOn(generateBuildConfig)
}


MPPTools.createRunTask(project, 'runProgram', kotlin.targets.runner) {
    
}

[gianluz]

@Dominaezzz thanks for your time btw

[Dominaezzz]

Move sourceSets below targets and if that doesn't work just rename generated to runnerMain and call it a day lol.

[gianluz]

before it was below targets already 😄 lol.. ok let me try

[gianluz]

hahah same.. 😅

[Dominaezzz]

You might need to add stdlib dependency to generated.

[yshrsmz]

btw you can use this plugin to generate somthing similar to BuildConfig 😉
https://github.com/yshrsmz/BuildKonfig