kotlinlang #build-tools

Eugen Martynov

01/09/2023, 1:16 PM

Does kotlin 1.8.0 strip in the bytecode parameter names in public functions? When IDE decompiles artifact built with Kotlin 1.8.0 I see

Copy code

@Nullable
 Object createConversation(int var1, @NotNull String var2, @Nullable String var3, boolean var4, @Nullable String var5, @NotNull Continuation<? super CreateConversationResult> var6);

 @Nullable
 Object retrySdkSessionInit(@NotNull Continuation<? super Unit> var1);

Or could it be R8? (this is an Android library).

Lucy

01/16/2023, 7:05 PM

Hello, 🙂 has anyone noticed differences with minification and Kotlin 1.8.0 (kotlin-gradle-plugin)? I'm building an Android library with minified enabled and the resulting class files are completely different from Kotlin 1.7.2. Example using 1.7.2 and minify

Copy code

public final class Test public constructor() {
    public final fun addOne(num: <http://kotlin.Int|kotlin.Int>): <http://kotlin.Int|kotlin.Int> { /* compiled code */ }

    public final suspend fun suspendAddOne(num: <http://kotlin.Int|kotlin.Int>): <http://kotlin.Int|kotlin.Int> { /* compiled code */ }
}

Same code after using 1.8.0 and minify

Copy code

public final class Test {
    public static final int $stable;

    public Test() {
    }

    public final Object suspendAddOne(int var1, Continuation<? super Integer> var2) {
        return Boxing.boxInt(var1 + 1);
    }

    public final int addOne(int var1) {
        return var1 + 2;
    }
}

In 1.8.0, I am also getting an extra parameter variable with suspend functions. I can't find any documentation or logs about this change (looked at kotlin, gradle, and minify/R8 release pages). If anyone could point me in the right direction it would be greatly appreciated!

jean

02/07/2023, 8:16 AM

I have a multiplatform library project that uses ksp to generate some code. When I try to publish that library to a maven repo I get

Unresolved reference

wherever the library is referencing a generated class/function. What am I suppose to do to tell the publish gradle task to also publish the generated code?

David Kubecka

04/13/2023, 10:31 AM

kotlin-maven-plugin

question: I'm using that plugin to run a (java) annotation processor. That processor uses

Diagnostic.Kind.NOTE

for diagnostic messages. These show up as ERROR in the plugin output, whereas the equivalent java plugin shows them as INFO. Is this expected?

Daniele Segato

06/06/2023, 7:09 AM

Does anyone know what this error means?

Copy code

java.lang.IllegalArgumentException: com.intellij.openapi.externalSystem.model.project.dependencies.DependencyScopeNode is not an interface
	at java.base/java.lang.reflect.Proxy$ProxyBuilder.validateProxyInterfaces(Unknown Source)
	at java.base/java.lang.reflect.Proxy$ProxyBuilder.<init>(Unknown Source)
	at java.base/java.lang.reflect.Proxy$ProxyBuilder.<init>(Unknown Source)
	at java.base/java.lang.reflect.Proxy.lambda$getProxyConstructor$0(Unknown Source)
	at java.base/jdk.internal.loader.AbstractClassLoaderValue$Memoizer.get(Unknown Source)
	at java.base/jdk.internal.loader.AbstractClassLoaderValue.computeIfAbsent(Unknown Source)
	at java.base/java.lang.reflect.Proxy.getProxyConstructor(Unknown Source)
	at java.base/java.lang.reflect.Proxy.newProxyInstance(Unknown Source)
	at org.gradle.tooling.internal.adapter.ProtocolToModelAdapter.createView(ProtocolToModelAdapter.java:160)
	at org.gradle.tooling.internal.adapter.ProtocolToModelAdapter.convert(ProtocolToModelAdapter.java:276)
	at org.gradle.tooling.internal.adapter.ProtocolToModelAdapter.access$1500(ProtocolToModelAdapter.java:56)
	at org.gradle.tooling.internal.adapter.ProtocolToModelAdapter$AdaptingMethodInvoker.invoke(ProtocolToModelAdapter.java:477)
	at org.gradle.tooling.internal.adapter.ProtocolToModelAdapter$PropertyCachingMethodInvoker.invoke(ProtocolToModelAdapter.java:705)
	at org.gradle.tooling.internal.adapter.ProtocolToModelAdapter$SafeMethodInvoker.invoke(ProtocolToModelAdapter.java:742)
	at org.gradle.tooling.internal.adapter.ProtocolToModelAdapter$SupportedPropertyInvoker.invoke(ProtocolToModelAdapter.java:766)
	at org.gradle.tooling.internal.adapter.ProtocolToModelAdapter$InvocationHandlerImpl.invoke(ProtocolToModelAdapter.java:432)
	at jdk.proxy6/jdk.proxy6.$Proxy166.getCompileDependenciesGraph(Unknown Source)
	in ProjectDependenciesSerializationService$2.process(ProjectDependenciesSerializationService.java:90)

The project get stuck at initial import when I open Android Studio, this started happening with AS Hedgehog Canary 6: worked in Canary 5. https://issuetracker.google.com/issues/285195965

dave08

06/19/2023, 11:33 AM

Anyone know how to solve

Cannot use @TaskAction annotation on method AbstractKotlinCompile.execute() because interface org.gradle.api.tasks.incremental.IncrementalTaskInputs is not a valid parameter to an action method.

when upgrading from an older AGP version to 8.0.2?

Norbi

09/05/2023, 12:41 PM

I try to upgrade my project to Kotlin 1.9.10 + Compose Multiplatform 1.5.0. Until now I used this configuration to ignore Compose incompatibility checks (with Kotlin 1.8.21 and Compose Multiplatform 1.5.0-dev1084):

Copy code

compose {
    kotlinCompilerPlugin.set(dependencies.compiler.forKotlin("1.8.20"))
    kotlinCompilerPluginArgs.add("suppressKotlinVersionCompatibilityCheck=1.8.21")
}

How should I modify the above configuration to prevent

Copy code

Compose Multiplatform 1.5.0 doesn't support Kotlin 1.9.10

error? Thanks.

chi

09/18/2023, 5:17 AM

I’m trying to upgrade my project from

kapt

ksp

but I’m seeing the following error;

Copy code

Execution failed for task ':app:kspDebugKotlin'.
> A failure occurred while executing org.jetbrains.kotlin.compilerRunner.GradleCompilerRunnerWithWorkers$GradleKotlinCompilerWorkAction
   > Compilation error. See log for more details

Please any idea what could be the cause and how I can fix this?

d4span

11/01/2023, 9:31 PM

After I upgraded to Kotlin 1.9.20, my Maven build breaks with the following error:

Copy code

[INFO] --- kotlin:1.9.20:kapt (default-kapt) @ awesomeproject ---
[ERROR] java.lang.IllegalAccessError: superclass access check failed: class org.jetbrains.kotlin.kapt3.base.javac.KaptJavaCompiler (in unnamed module @0x63300c4b) cannot access class com.sun.tools.javac.main.JavaCompiler (in module jdk.compiler) because module jdk.compiler does not export com.sun.tools.javac.main to unnamed module @0x63300c4b
	at java.base/java.lang.ClassLoader.defineClass1(Native Method)
	at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1027)
	at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:150)
	at java.base/java.net.URLClassLoader.defineClass(URLClassLoader.java:524)
	at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:427)
	at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:421)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:714)
	at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:420)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:593)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526)
	at org.jetbrains.kotlin.kapt3.base.KaptContext.<init>(KaptContext.kt:55)

With Kotlin 1.9.10, everything works as expected. Any ideas how I can fix this?

Christopher Hübner

01/15/2024, 9:08 AM

What book/course/documentation for getting deep dive in gradle, kotlin, testing and multi module pattern? 🙂

Vivek Rajendran

02/21/2024, 6:01 AM

Do we have any library similar to androidx.annotation.RestrictTo in kotlin? I am trying to create modular kmp sdk with limited api surface. I want some of the apis to be accessible in my other sdks but restrict them in public. For similar case, androidx has androidx.annotation.RestrictTo. Do we have anything similar in kotlin kmp world?

Dmytro Serdiuk

02/26/2024, 12:34 AM

Hello! I saw that to run kotlin compiler before java using maven we need to add:

Copy code

<executions>
<!-- Replacing default-compile as it is treated specially by maven -->
<execution> <id>default-compile</id> <phase>none</phase>
</execution>
<!-- Replacing default-testCompile as it is treated specially by maven --> <execution>
<id>default-testCompile</id>
<phase>none</phase>

I know that default-goal is added as an ID by default, but why “default-compile” is called first even if the plugin defined the second inn the pom file? Thanks!

cfleming

04/09/2024, 6:39 AM

Is there any way to get incremental Kotlin compilation using the CLI compiler?

czuckie

04/15/2024, 11:08 AM

Fwiw: I got an email asking me to take a survey from JB and it renders incorrectly on mobile and is unresponsive

Andy Hebert

04/18/2024, 7:15 PM

Has anyone had issues with a Kotlin JVM app when trying to use AppCDS. I am running into

Copy code

[5.016s][info   ][cds         ] Run GC done
[5.016s][error  ][cds         ] Error: non-empty directory '/home/a/git/u/build/classes/kotlin/main'
Hint: enable -Xlog:class+path=info to diagnose the failure

Because Kotlin is putting a app-name.kotlin_module int the build/classes/kotlin/main/META-INF directory. Anyone have a way to work around this?

Norbi

08/16/2024, 1:55 PM

I have realized that originally I posted to the wrong channel...

robnik

08/21/2024, 3:57 PM

I tried upgrading Kotlin to 2.0.10 (from 1.something), and now our Maven builds are sporadically failing with this. Anyone know what this is?

Copy code

[INFO] --- kotlin-maven-plugin:2.0.10:compile (compile) @ omnisee ---
[WARNING] Using experimental Kotlin incremental compilation
[ERROR] Incremental compilation failed: java.lang.NegativeArraySizeException
java.io.IOException: java.lang.NegativeArraySizeException
	at com.intellij.util.io.IOUtil.readString(IOUtil.java:48)
	at org.jetbrains.kotlin.incremental.storage.StringExternalizer.read(externalizers.kt:225)
	at org.jetbrains.kotlin.incremental.storage.FileDescriptor.read(FileToPathConverter.kt:37)
	at org.jetbrains.kotlin.incremental.storage.FileDescriptor.read(FileToPathConverter.kt:30)

Harish Reddy

09/16/2024, 10:28 AM

Hello folks! Hope you are all doing great! I am facing some issues with Publishing Android library setup. Any help/pointers would be greatly appreciated. I have a KMP project with multi-module setup. Module-1:

CoreModule

Module-2:

FeatureModule

FeatureModule

references

CoreModule

internally using

api(project(path = ":CoreModule))

. The final artifact

FeatureModule

after publishing to maven/maven local is supposed to be integrated in main Android app. So, now my expectation is to have the code within

CoreModule

to be accessible inside the main Android app since

FeatureModule

includes the

CoreModule

. But, I can’t access the code/classes within

CoreModule

inside the main Android app. This is a KMP project which I am not so familiar with. So, not sure if it is a KMP thing or something else. Any idea what could be missing in this setup? I am attaching reference code in the thread.

Natalia Mishina

10/09/2024, 9:16 AM

Hey! Kotlin team is wondering if this feedback question would be clear to you. Could you help us by letting us know how you understand it? kodee pleased Imagine that, while working in IntelliJ IDEA, you see this feedback window pop up (see the picture attached). What do you think we're asking you to evaluate? Please vote by reacting to this post: 1️⃣ It’s about my experience with Gradle as a build tool. 2️⃣ It’s about my experience with Gradle in the context of Kotlin. 3️⃣ It’s about how Gradle integrates with the IDE. 4️⃣ It’s about my overall experience using Gradle. 5️⃣ It’s about my overall experience using Kotlin. 6️⃣ I’ll write my own interpretation in the thread. Thanks a lot for your help!

2️⃣ 1

3️⃣ 11

4️⃣ 1

5️⃣ 1

6️⃣ 1

1️⃣ 8

10/24/2024, 4:14 AM

Hello! With Kotlin 2.0.20 deprecating support for Gradle's built-in 'application' plugin for packaging distributable JVM executable archives, can https://youtrack.jetbrains.com/issue/KT-41409 be reopened for a first-party KGP replacement?

👌 6

👌🏾 2

➕ 4

Charlie Tapping

01/20/2025, 6:15 PM

Whats the chances we can get a linuxArm64Test task? Github now supports linux arm runners and I’d like to add a workflow to cover this platform

calidion

02/02/2025, 2:08 PM

seems I cannot download this package now.

sad panda 1

joseph_ivie

02/20/2025, 5:39 AM

I'm looking into putting together an alternative to Gradle and Amper for KMP projects, mostly as a hobby. I think I've figured out the majority of what I need by reading through Amper's source, but I'm lost on how these integrate into IntelliJ - I've seen how IntelliJ only JVM projects use

.iml

files to define the modules, but the Gradle integration does not appear to generate any of these files, yet somehow works. Is an IntelliJ plugin necessary to define the projects and modules? If so, can anyone get me a good starting point? My non-multiplatform version of this project just used those `.iml`s but that's not an option this time around.

jrod

04/03/2025, 12:36 AM

👋 seeing this issue on our CI/Jenkins environments while building KMP projects. looks like it's been open for a while; are we misconfiguring something or is the suggestion about the lazy caching of the device map a valid concern?

dead.fish

05/05/2025, 3:05 PM

Hi, I recently updated to KSP 2.1.20-1.0.32 (Kotlin 2.1.20) and get an exception when compiling:

Copy code

java.lang.NoSuchMethodError: 'void org.jetbrains.kotlin.incremental.IncrementalCompilationFeatures.<init>(boolean, boolean, boolean, boolean, boolean, int, kotlin.jvm.internal.DefaultConstructorMarker)'
        at org.jetbrains.kotlin.gradle.tasks.AbstractKotlinCompile.makeIncrementalCompilationFeatures(AbstractKotlinCompile.kt:288)
        at org.jetbrains.kotlin.gradle.tasks.KotlinCompile.makeIncrementalCompilationFeatures(KotlinCompile.kt:476)
        at org.jetbrains.kotlin.gradle.tasks.KotlinCompile.callCompilerAsync$kotlin_gradle_plugin_common(KotlinCompile.kt:331)
        at org.jetbrains.kotlin.gradle.tasks.KotlinCompile.callCompilerAsync$kotlin_gradle_plugin_common(KotlinCompile.kt:55)
        at org.jetbrains.kotlin.gradle.tasks.AbstractKotlinCompile.executeImpl(AbstractKotlinCompile.kt:314)
        at org.jetbrains.kotlin.gradle.tasks.AbstractKotlinCompile.execute(AbstractKotlinCompile.kt:263)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:568)
        at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:125)
        at org.gradle.api.internal.project.taskfactory.IncrementalTaskAction.doExecute(IncrementalTaskAction.java:45)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:51)
        at org.gradle.api.internal.project.taskfactory.IncrementalTaskAction.execute(IncrementalTaskAction.java:26)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:29)
        at org.gradle.api.internal.tasks.execution.TaskExecution$3.run(TaskExecution.java:244)

Anybody has seen this before?

dead.fish

05/05/2025, 3:08 PM

Switching off incremental compilation (via

-Pkotlin.incremental=false

) fixes the issue. This seems to affect both Android and multiplatform projects.

06/04/2025, 2:00 AM

As of KGP 2.1 using

associateWith

on a custom compilation seems to depend on the jar output of the target compilation whereas in 2.0 it depended only on the classes. Depending on the jar is problematic because this is was a handy mechanism for creating multi-release jars. But with

associateWith

depending on the jar, this creates a task cycle. Is there some other way to do what

associateWith

was doing without depending on the jar?

10/02/2025, 6:40 PM

The

com.android.kotlin.multiplatform.library

plugin creates a

KotlinTarget

(

com.android.build.api.variant.impl.KotlinMultiplatformAndroidLibraryTargetImpl

) whose

platformType

is "jvm" as opposed to "androidJvm". @Sebastian Sellmair [JB] indicated on another Slack workspace that this was intentional. A few questions have come up related to this. How should we write code that operates on all targets (or a subset of them) and correctly differentiate JVM vs. Android. For example, Android differs from the JVM in having multiple variants by default, having two test compilations (times the number of product flavors), etc. Should we prefer doing type checks on the target instead of using

platformType

? And the fact that this comes with extra burden when you have a

compileOnly

dependency on AGP, since you can no longer do a simple

as? KotlinMultiplatformAndroidLibraryTarget

without a try/catch on

NoClassDefFoundException

, or otherwise doing a

Class.forName

and then reflective

isInstance

Timofey Solonin

10/13/2025, 8:25 AM

Hi folks. Last week, we published a KEEP design proposal for the new KMP library serialization format (the UKlib) and the overhaul of the dependency model. Your critique and thorny edge cases are welcome in the discussion for the KEEP.

K 7

Marcin Mycek

10/14/2025, 2:01 PM

👋🏻 Looking for DSL design input! 🙂 Question to all people that write/edit (or look at) KMP Gradle build scripts: What things do you configure on the level of either: • low-level platforms (so

linuxArm64

yes, but not `linux`;

macosX64

yes, but not `macos`; etc.) ◦ Ignoring platforms that don't have lower-level (

android

and

jvm

) :) • OR higher-level platforms that are not
common
(so

native

apple

web

, or any similar level custom source set) Please share: • What do you configure? Why? Is it app module or library module? ◦ What others have seen do? • Can you point me to the repository if it's public? Share a build script or part of it? If you want write a bit or just share a link - kodee loving thank you color ! If you have time to write more - kodee loving thank you color !