I'm not able to run a simple example with Koin (4....

# koin

[Roberto Fernandez Montero]

I'm not able to run a simple example with Koin (4.1) + KMP (Web & desktop target) + Koin Annotations (4.0,1RC) , having this error

[ksp] --> Missing Definition for property 'settings : com.russhwolf.settings.Settings' in 'com.binshelve.data.local.UserRepository'. Fix your configuration: add definition annotation on the class.

[Kibet Theophilus]

share you local repository setup

i.e

class LocalRepository(....)

[Roberto Fernandez Montero]

I've a shared module with this class in commonMain

package com.binshelve.shared.data

import com.russhwolf.settings.Settings
import org.koin.core.annotation.Factory
import org.koin.core.annotation.Module

@Module
expect class SettingsModule() {
    @Factory
    fun providesSettings(): Settings
}

expect fun settings(): Settings

And the actual implementations (Wasm as example)

package com.binshelve.shared.data

import com.russhwolf.settings.Settings
import com.russhwolf.settings.StorageSettings
import org.koin.core.annotation.Factory
import org.koin.core.annotation.Module
import org.koin.core.annotation.Single

@Module
actual class SettingsModule actual constructor() {
    @Factory
    actual fun providesSettings() = settings()
}

actual fun settings(): Settings = StorageSettings()

Also in my app gradle module, I have this

package com.binshelve.ui.components

import androidx.compose.runtime.Composable
import com.binshelve.data.di.DataModule
import com.binshelve.shared.SharedModule
import com.binshelve.ui.di.UIModule
import com.binshelve.ui.screen.application.applicationsUiModule
import com.binshelve.usecases.di.UseCasesModule
import org.koin.compose.KoinApplication
import org.koin.ksp.generated.module

@Composable
fun Koin(content: @Composable () -> Unit) {
    KoinApplication(
        application = {
            modules(
                UIModule().module,
                DataModule().module,
                UseCasesModule().module,
                SettingsModule().module,
                applicationsUiModule, //Needed to instantiate viewmodel with params
            )
        }
    ) { content() }
}

And also in build.gradle.kts configurations for app

dependencies {
    debugImplementation(compose.uiTooling)
    add("kspCommonMainMetadata", libs.koin.ksp.compiler)
    add("kspJs", libs.koin.ksp.compiler)
    add("kspJvm", libs.koin.ksp.compiler)
    add("kspWasmJs", libs.koin.ksp.compiler)
    add("kspAndroid", libs.koin.ksp.compiler)
}

ksp {
    arg("KOIN_CONFIG_CHECK", "true")
    arg("KOIN_USE_COMPOSE_VIEWMODEL", "true")
    arg("KOIN_DEFAULT_MODULE", "true")
}

tasks.withType<KotlinCompilationTask<*>>().all {
    if(name != "kspCommonMainKotlinMetadata") {
        dependsOn("kspCommonMainKotlinMetadata")
    }
}

tasks.findByName("compileDebugKotlinAndroid")?.dependsOn("kspCommonMainKotlinMetadata")
tasks.findByName("compileReleaseKotlinAndroid")?.dependsOn("kspCommonMainKotlinMetadata")
tasks.findByName("compileKotlinJvm")?.dependsOn("kspCommonMainKotlinMetadata")
tasks.findByName("compileKotlinJs")?.dependsOn("kspCommonMainKotlinMetadata")
tasks.findByName("compileKotlinWasmJs")?.dependsOn("kspCommonMainKotlinMetadata")

And build.gradle.kts in shared module

dependencies {
    implementation(libs.androidx.startup.runtime)
    ksp(libs.koin.ksp.compiler)
    add("kspCommonMainMetadata", libs.koin.ksp.compiler)
    add("kspJs", libs.koin.ksp.compiler)
    add("kspJvm", libs.koin.ksp.compiler)
    add("kspWasmJs", libs.koin.ksp.compiler)
    add("kspAndroid", libs.koin.ksp.compiler)
}

ksp {
    arg("KOIN_DEFAULT_MODULE", "true")
}

tasks.withType<KotlinCompilationTask<*>>().all {
    if (name != "kspCommonMainKotlinMetadata") {
        dependsOn("kspCommonMainKotlinMetadata")
    }
}

tasks.findByName("compileDebugKotlinAndroid")?.dependsOn("kspCommonMainKotlinMetadata")
tasks.findByName("compileReleaseKotlinAndroid")?.dependsOn("kspCommonMainKotlinMetadata")
tasks.findByName("compileKotlinJvm")?.dependsOn("kspCommonMainKotlinMetadata")
tasks.findByName("compileKotlinJs")?.dependsOn("kspCommonMainKotlinMetadata")
tasks.findByName("compileKotlinWasmJs")?.dependsOn("kspCommonMainKotlinMetadata")

And usage of it is simple

@Single
class UserRepository(
    private val json: Json = Json { ignoreUnknownKeys = true },
    private val settings: Settings,
) {
    fun saveUser(user: User) {
        settings.putString("user", json.encodeToString(user))
    }

    fun getUser(): User? =
        settings.getStringOrNull("user")?.let { json.decodeFromString(it) }
}

Am I missing something?

[Roberto Fernandez Montero]

Added the repository as well in the question

[Kibet Theophilus]

can you try adding @Provided
i.e

@Single
class UserRepository(
    private val json: Json = Json { ignoreUnknownKeys = true },
    @Provided private val settings: Settings,
) {
   ....
}

[Roberto Fernandez Montero]

Done, not sure why this annotation is needed honestly 😕

Now it's a different error:

e: file:///Users/user/branches/Binshelve/composeApp/src/commonMain/kotlin/com/binshelve/ui/components/Koin.kt:20:32 None of the following candidates is applicable:
val DataModule.module: Module
val UIModule.module: Module
val UseCasesModule.module: Module

It is not able to find SettingsModule (Which is in shared gradle's module)

Looks like annotations are not being well processed?

[Kibet Theophilus]

let me try come up with a repro, but if you have a ready project you can share

[Roberto Fernandez Montero]

I can set it up one. On it

[Roberto Fernandez Montero]

So I've found the issue, it is just something in my configuration becuse in the basic project I was setting up to show the case it is working. Will investigate a bit more

[Kibet Theophilus]

okay

[Roberto Fernandez Montero]

Thanks!!

[Roberto Fernandez Montero]

Not sure what did I have wrong with the project, but finally it worked.

[Roberto Fernandez Montero]

Thanks for the help

[Kibet Theophilus]

Glad to hear you solved it, welcome.