Good evening. maybe a stupid question but… . We’re developing a KMP library targeting JS (web) (and in the future android, etc). The JS target are published as npm packages on our registry. We use the npm-packages in a SPA (not nodeJs) Now to my question, should JS target browser or nodejs? As I understand it, the DCE (threeshaking) is only used by the browser “target”. Using the DCE should result in smaller npm packages? Or?

hello, I have a project that uses build.gradle (groovy) instead of the kotlin version. I'm trying to translate the fatFramework logic for iOS in groovy but it's taking a long time. Wondering if anyone had a build.gradle to share with that logic already?

Hey, I'm developing a KMP library targeting iOS & Android. I have included library in Android app as a Jar. Now getting this exception while trying to access the service. java.lang.NoClassDefFoundError: Failed resolution of: Lkotlinx/serialization/json/JsonKt;

Hello everyone, hope this one is easy to answer, I’m trying to create a 

UITableView

 class, extending both `UITableViewDataSourceProtocol`and 

UITableViewDelegateProtocol

 , and when overriding methods, I get the following error when running (compiling does not produce any error):

/Users/teamcity1/teamcity_work/4d622a065c544371/runtime/src/main/cpp/ObjCInterop.cpp:137: runtime assert: Unable to add method to Objective-C class

I’m not really sure what’s causing the error, I only needed to extend the Delegate for the following method:

@Suppress("CONFLICTING_OVERLOADS")    
override fun tableView(tableView: UITableView, viewForHeaderInSection: NSInteger): UIView? {
    return UIView()
}

Does anyone knows what I could do? EDIT: Even if I remove the override, the compiler will tell me that: must override public open external fun debugDescription(): String? But when I override it, I get the same error.. (edited) (already tried asking on native channel but got no answer)

Hi, all. Being practical my question is “What can be used for files IO in Kotlin Multiplatform at the moment” (let’s say i want to open a text file and get all the lines on both iOS and Android)? I came up with some `expect`ed classes and home-brew 

actual

 impls using 

fopen(), ...

 in the 

native

 sourceSet. Any existing/proper way of doing that? PS. https://github.com/orangy/kotlinx-files seems to be discontinued

This message was deleted.

👆sorry for two different messages(slack broke into two). but i add more information on first thread. thanks

Hi all, I have multi module gradle project(mono repo) for spring boot micro services and their common libraries. I am trying to take one common library(ktor client http wrapper) and migrate it to multiplatform module by changing build.gradle.kts file like this:

I followed the official tutorial to create a mpp library https://kotlinlang.org/docs/tutorials/mpp/multiplatform-library.html How can I import that library into a javascript project?

I realized I have a similar feeling of when Google launched Firebase in 2016. At that time I thought: “This is great! finally a suite that unifies Google services for the different platforms! Everything looks so neat and clear! From the same console I can manage the Google services for both the Android and iOS apps!” Now the feeling is: “Wow, finally I can just use Android Studio to configure and build all my apps!” Kotlin MultiPlatform feels like the biggest step forward since Firebase. Not only Google services, but the whole application logic is now multiplatform. The next big step will happen when JetpackCompose will become multiplatform too. It’s probably going to take 2 more years.

Hi everyone! To enable the hierarchy structure support, I set

kotlin.mpp.enableGranularSourceSetsMetadata=true

in

gradle.properties

as you can find in https://kotlinlang.org/docs/reference/mpp-share-on-platforms.html#share-code-on-similar-platforms, but as a side effect, android source set is not included in the publication! How can I publish for android then? My project is https://github.com/hadilq/log4k/ if it helps. Thanks

Is anyone having issues with the IDE after updating to 1.4.0? Symbols from dependencies are red, even

platform.*

imports are red, but code compiles just fine. And the error stays after a clean build / invalidating the cache

Hi, I'm stuck with Koin DI. For explanation I have the same "setup" as this one: https://johnoreilly.dev/posts/kotlinmultiplatform-koin/ But the initialization if failing with:

Error Domain=KotlinException Code=0 "Could not create instance for [Single:'com.poc.app.kmm.core.interactors.login.getAuthenticationToken.GetAuthenticationTokenUseCase']"

If you have an idea?

how can i use

jvm()

to set a java 8 target?

hi all 👋 currently using Kotlin/Ktor

1.4.0

to make a very simple API call on a multiplatform mobile project, however I get

Thread 1: EXC_BAD_ACCESS(code=1, ...)

error when I run the IOS code. Anybody run into this issue? It throws the error on this line in the

mainIos

source set:

actual val engine by lazy { Ios.create() }

would appreciate any insight 🙂

Is there a workaround to the current unavailability of

kotlinx-coroutines-core-native:1.3.9

?

When starting a new KMM application, I ran into a crash on iOS that I’m trying to make some sense of. The error message is:

Uncaught Kotlin exception: kotlin.native.concurrent.FreezingException: freezing of com.ramseysolutions.proportalspike.shared.Globals.Companion@f13308 has failed, first blocker is HttpClient[io.ktor.client.engine.ios.IosClientEngine@f13488]

The offending code was:

kotlin

val json = kotlinx.serialization.json.Json { ignoreUnknownKeys = true }
fun createHttpClient() = HttpClient() {
    install(JsonFeature) {
        serializer = KotlinxSerializer(json)
    }
}


class Globals {
    companion object {
        client = createHttpClient()
    }
}

The iOS application utilizes that client in its first view. I noticed in my debugging, that the breakpoints in my iOS project were never getting hit. So I determined the crash was happening before the class that was referencing

client

was ever created. Working that theory, I was able to stop the crash from occurring and achieve the correct results on iOS and Android by removing that

client

property from the

companion object

and by creating a global variable in the iOS project:

// Kotlin Shared

class Globals {
    client = createHttpClient()
}

// iOS
let globals = Globals()

After resolving that, I asserted that a simple global variable would fail also, and I was correct when I tested that. My questions are: what was causing the failure? Are Coroutines unavailable until a certain point in the iOS application lifecycle? And what resources or tools can I use to figure that type of thing out on my own?

Hey all, new to Kotlin, come from a js background. Playing with https://github.com/Kotlin/kotlin-full-stack-application-demo, HMR fails. It looks like

PROJECT_ROOT/build/js/packages/kotlin-full-stack-application-demo-client/kotlin/kotlin-full-stack-application-demo-client.js

gets deleted during

compileKotlinJs

task which causes HMR to fail out with

Error: ENOENT: no such file or directory, open

. I'm trying to wrap my head around the config and it seems I need to have the task ``compileKotlinJs`` not clear the folder and just overwrite the content, but I'm not quite sure how, or if that's the correct solution.

Does anyone know where to put assets(html/js) in a kotlin mp project ios target so that they are available when the framework is imported? Thread in Slack Conversation

Hey all, new to KMP. I was wondering, is it possible to publish a “kotlin” library for use in multi platform projects? I don’t want Library A (kotlin code, no dependencies) to have to compile for every target that Library B wants to use. Especially with regards to macOS/iOS targets. If not, is it possible to compile for iOS targets (assuming we don’t use any of the framework code) without a mac?

Hello! Is there a sample project or a tutorial for K1.4 on how to build and publish Kotlin project as a Cocoapods?

Hi, I keep getting this error

There is no event loop. Use runBlocking { ... } to start one.

from the iOS part, I use kotlin 1.4, coroutines 1.3.9 and my iOS dispatcher is based on this https://github.com/JetBrains/kotlinconf-app/blob/33f2d4e65f470d1444c5d4b46249af8feb243d03/common/src/iosMain/kotlin/org/jetbrains/kotlinconf/DispatcherNative.kt I have tried using native-mt with Dispatchers.Main but this gives me another error

Fatal exception in coroutines machinery for CancellableContinuation

The Android part works as expected. I have searched and tried a lot of solutions, but can't seem to figure out what's going wrong, any guidance is much appreciated 🙂

I have this error on iOS when I'm calling my suspend KTOR functions.

Uncaught Kotlin exception: kotlinx.coroutines.CoroutinesInternalError: Fatal exception in coroutines machinery for DispatchedContinuation[WorkerCoroutineDispatcherImpl@1364278, Continuation @ $split$lambda-0$<anonymous>_3COROUTINE$2]. Please read KDoc to 'handleFatalException' method and report this incident to maintainers
HttpClient: RESPONSE <https://app.bluekango.com/mobile/app/login> failed with exception:
kotlin.native.concurrent.InvalidMutabilityException: mutation attempt of frozen kotlinx.coroutines.AwaitAll.AwaitAllNode@3eeba78

I have done some research and found that there are some issues with Ktor/Coroutines, but I don't know what can I do to avoid this issue..? I tried to retrograde my version (not working with my current project) and I'am already using the specific agent engine for iOS or Android. But not working. Link: https://github.com/ktorio/ktor/issues/1550

Hey guys, having pretty similar issues to the described above and cannot fix it

kotlin.native.concurrent.FreezingException: freezing of InvokeOnCompletion[InvokeOnCompletion@360fd08] has failed, first blocker is HttpClient[io.ktor.client.engine.ios.IosClientEngine@362a408]
freezing of InvokeOnCompletion[InvokeOnCompletion@360fd08] has failed, first blocker is HttpClient[io.ktor.client.engine.ios.IosClientEngine@362a408]

I’m running

const val kotlinVersion = "1.4.0"
const val coroutinesVersion = "1.3.9-native-mt"
const val ktorVersion = "1.4.0"
const val serializationVersion = "1.0.0-RC"

Anyone can help?

Hello, I have a doubt about something in native kotlin https://kotlinlang.org/docs/reference/native/objc_interop.html#kotlin-singletons We agree that if I declare an object like this

object MyObject {

val property: String = ""

}

In swift, I can call this singleton like this

MyObject().property

, it will not recreate a new instance of MyObject each time?

Anyone else run into issues with the cocoapods plugin using 1.4.10? No issues with 1.4.0.

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':tasks'.
> Could not create task ':shared:podInstall'.
   > Task with name 'podspec' not found in project ':shared:api'.

Hi guys! I am a Chinese developer and I am trying KMP recently. I have done enough research and it is great, and I am going to try KMP, but there are still two questions I haven’t found answers to. The questions are as follows: 1. What is the planning and ultimate goal of KMP in the later stage？ 2. The principle of KMP compiler I wonder if there are any Kotlin related developers or others who can help me? thank you very much!

Today's not-very-funny: I have a multiplatform project that I use as a dependency in several other projects (of course), and today, these other projects suddenly couldn't find my new snapshot versions ... (continued (and solved!) in thread)

Hi, I found this gradle property in kotlinx.coroutines repo:

kotlin.mpp.enableCompatibilityMetadataVariant=true

What does it do exactly? I'm interested because I'm in the process of testing publishing and consumption of multiplatform libraries (Android, native, JS and JVM).