Update Kotlin to version 2.1.0

[andreas-eberle]

Update Kotlin to version 2.1.0, Kotlinx Serialization to 1.8.0 and Kotlin Coroutines to 1.10.0

Since the Kotlin update was removed again from PR #45228, I'm opening this PR to add it separately. This is an updated version of the original PR #44809.

[github-actions]

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[andreas-eberle]

I see the quickstarts compilation failed. I had a look at a problematic project and noticed that it has Kotlin version 1.7.20 set in its pom: https://github.com/quarkusio/quarkus-quickstarts/blob/main/hibernate-orm-panache-kotlin-quickstart/pom.xml

Why is there a specific version set? Should it use the version comping from the platform bom? Can I update that quickstart to use Kotlin 2.1?

[andreas-eberle]

There is also a failure in the Gradle tests. I'm not sure if I understand this test correctly, but it looks like it might use old Quarkus libraries compiled without the changes in this PR. Is this possible? Or am I misunderstanding this?

The shows:

2025-01-10T13:07:05.9811852Z e: file:///home/runner/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-reflect/2.1.0/dc3753b59b67d79b7d2f546d51e22a0ec1f082d8/kotlin-reflect-2.1.0.jar!/META-INF/descriptors.jvm.kotlin_moduleModule was compiled with an incompatible version of Kotlin. The binary version of its metadata is 2.1.0, expected version is 1.9.0.
2025-01-10T13:07:05.9813996Z e: file:///home/runner/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-reflect/2.1.0/dc3753b59b67d79b7d2f546d51e22a0ec1f082d8/kotlin-reflect-2.1.0.jar!/META-INF/descriptors.runtime.kotlin_moduleModule was compiled with an incompatible version of Kotlin. The binary version of its metadata is 2.1.0, expected version is 1.9.0.
2025-01-10T13:07:05.9815954Z e: file:///home/runner/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-reflect/2.1.0/dc3753b59b67d79b7d2f546d51e22a0ec1f082d8/kotlin-reflect-2.1.0.jar!/META-INF/deserialization.common.jvm.kotlin_moduleModule was compiled with an incompatible version of Kotlin. The binary version of its metadata is 2.1.0, expected version is 1.9.0.
2025-01-10T13:07:05.9817916Z e: file:///home/runner/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-reflect/2.1.0/dc3753b59b67d79b7d2f546d51e22a0ec1f082d8/kotlin-reflect-2.1.0.jar!/META-INF/deserialization.common.kotlin_moduleModule was compiled with an incompatible version of Kotlin. The binary version of its metadata is 2.1.0, expected version is 1.9.0.
2025-01-10T13:07:05.9820265Z e: file:///home/runner/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-reflect/2.1.0/dc3753b59b67d79b7d2f546d51e22a0ec1f082d8/kotlin-reflect-2.1.0.jar!/META-INF/deserialization.kotlin_moduleModule was compiled with an incompatible version of Kotlin. The binary version of its metadata is 2.1.0, expected version is 1.9.0.
2025-01-10T13:07:05.9822371Z e: file:///home/runner/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-reflect/2.1.0/dc3753b59b67d79b7d2f546d51e22a0ec1f082d8/kotlin-reflect-2.1.0.jar!/META-INF/kotlin-reflection.kotlin_moduleModule was compiled with an incompatible version of Kotlin. The binary version of its metadata is 2.1.0, expected version is 1.9.0.
2025-01-10T13:07:05.9824426Z e: file:///home/runner/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-reflect/2.1.0/dc3753b59b67d79b7d2f546d51e22a0ec1f082d8/kotlin-reflect-2.1.0.jar!/META-INF/metadata.jvm.kotlin_moduleModule was compiled with an incompatible version of Kotlin. The binary version of its metadata is 2.1.0, expected version is 1.9.0.
2025-01-10T13:07:05.9826350Z e: file:///home/runner/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/2.1.0/85f8b81009cda5890e54ba67d64b5e599c645020/kotlin-stdlib-2.1.0.jar!/META-INF/kotlin-stdlib-jdk7.kotlin_moduleModule was compiled with an incompatible version of Kotlin. The binary version of its metadata is 2.1.0, expected version is 1.9.0.
2025-01-10T13:07:05.9828354Z e: file:///home/runner/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/2.1.0/85f8b81009cda5890e54ba67d64b5e599c645020/kotlin-stdlib-2.1.0.jar!/META-INF/kotlin-stdlib-jdk8.kotlin_moduleModule was compiled with an incompatible version of Kotlin. The binary version of its metadata is 2.1.0, expected version is 1.9.0.
2025-01-10T13:07:05.9830202Z e: file:///home/runner/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/2.1.0/85f8b81009cda5890e54ba67d64b5e599c645020/kotlin-stdlib-2.1.0.jar!/META-INF/kotlin-stdlib.kotlin_moduleModule was compiled with an incompatible version of Kotlin. The binary version of its metadata is 2.1.0, expected version is 1.9.0.
2025-01-10T13:07:05.9832342Z e: file:///home/runner/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlinx/kotlinx-coroutines-core-jvm/1.10.0/37966d769934a42566dec1ca2e1da6e5565c4e06/kotlinx-coroutines-core-jvm-1.10.0.jar!/META-INF/kotlinx-coroutines-core.kotlin_moduleModule was compiled with an incompatible version of Kotlin. The binary version of its metadata is 2.1.0, expected version is 1.9.0.
2025-01-10T13:07:05.9834437Z e: file:///home/runner/.m2/repository/io/quarkus/quarkus-rest-kotlin/999-SNAPSHOT/quarkus-rest-kotlin-999-SNAPSHOT.jar!/META-INF/quarkus-rest-kotlin.kotlin_moduleModule was compiled with an incompatible version of Kotlin. The binary version of its metadata is 2.1.0, expected version is 1.9.0.
2025-01-10T13:07:05.9836159Z e: file:///home/runner/.m2/repository/io/quarkus/quarkus-vertx-kotlin/999-SNAPSHOT/quarkus-vertx-kotlin-999-SNAPSHOT.jar!/META-INF/quarkus-vertx-kotlin.kotlin_moduleModule was compiled with an incompatible version of Kotlin. The binary version of its metadata is 2.1.0, expected version is 1.9.0.
2025-01-10T13:07:05.9836177Z 

[gsmet]

Which specific Gradle test is failing?

[andreas-eberle]

It's ConditionalDependenciesKotlinTest

[gsmet]

You lost some of the additional changes I made in the operation. I added a commit restoring them.

[gsmet]

That being said, I'm unsure how it will fly with Gradle as I ended up having issues with Gradle compatibility itself.

[andreas-eberle]

I've created quarkusio/quarkus-quickstarts#1489 to update the Quickstart to fix that build error. Unfortunately, I don't understand the other compilation errors. Are they just flaky tests or is there something I need to fix? I'm a bit confused...

[gsmet]

Yeah so the remaining error is the one for which I was thinking we would need a Gradle upgrade to be compatible but I'm not entirely sure:

java.lang.NoSuchMethodError: 'org.gradle.internal.buildoption.BuildOption$Value org.gradle.api.internal.StartParameterInternal.getIsolatedProjects()'	
	at org.jetbrains.kotlin.gradle.plugin.internal.ProjectIsolationStartParameterAccessorG76$isProjectIsolationEnabled$2.invoke(ProjectIsolationStartParameterAccessorG76.kt:16)	
	at org.jetbrains.kotlin.gradle.plugin.internal.ProjectIsolationStartParameterAccessorG76$isProjectIsolationEnabled$2.invoke(ProjectIsolationStartParameterAccessorG76.kt:15)	
	at kotlin.SynchronizedLazyImpl.getValue(LazyJVM.kt:74)	
	at org.jetbrains.kotlin.gradle.plugin.internal.ProjectIsolationStartParameterAccessorG76.isProjectIsolationEnabled(ProjectIsolationStartParameterAccessorG76.kt:15)	
	at org.jetbrains.kotlin.gradle.plugin.internal.ProjectIsolationStartParameterAccessorKt.isProjectIsolationEnabled(ProjectIsolationStartParameterAccessor.kt:45)	
	at org.jetbrains.kotlin.gradle.plugin.statistics.BuildFusService$Companion.registerIfAbsentImpl(BuildFusService.kt:94)	
	at org.jetbrains.kotlin.gradle.plugin.statistics.BuildFusService$Companion.registerIfAbsent(BuildFusService.kt:80)	
	at org.jetbrains.kotlin.gradle.plugin.DefaultKotlinBasePlugin.apply(KotlinPluginWrapper.kt:75)	
	at org.jetbrains.kotlin.gradle.plugin.KotlinBasePluginWrapper.apply(KotlinPluginWrapper.kt:197)	
	at org.jetbrains.kotlin.gradle.plugin.KotlinMultiplatformPluginWrapper.apply(PluginWrappers.kt:74)	
	at org.jetbrains.kotlin.gradle.plugin.KotlinMultiplatformPluginWrapper.apply(PluginWrappers.kt:68)	
	at org.gradle.api.internal.plugins.ImperativeOnlyPluginTarget.applyImperative(ImperativeOnlyPluginTarget.java:54)

I think you will need to have a look at what this method is and why it can't find it.

[andreas-eberle]

This might be caused by https://youtrack.jetbrains.com/issue/KTIJ-31860/Sync-failure-when-using-Kotlin-2.1.20-dev-1129

[andreas-eberle]

@gsmet : How did you find this exception? I tried to look in the raw logs of the failed builds, but couldn't find it.

[gsmet]

There is a link to a Gradle build scan. I just searched for the module name and loaded the build scan.

[andreas-eberle]

So from what I found, it seems Gradle moved/renamed a class (remvoing BuildOption in favour of Option), which the kotlin-gradle plugin depends on. In https://youtrack.jetbrains.com/issue/KTIJ-31860/Sync-failure-when-using-Kotlin-2.1.20-dev-1129 it was suggested to manually set the Gradle Plugin Variant to gradle85. I tried to acomplish this by setting it in the Quarkus Gradle Plugin Code but couldn't get it to work.

To reproduce this issue, the simplest way is to switch into the directory devtools/gradle in the Quarkus main project and then run ./gradlew :gradle-application-plugin:test --tests "io.quarkus.gradle.QuarkusPluginTest.shouldNotFailOnProjectDependenciesWithoutMain"

Maybe a gradle expert has an idea?

[gsmet]

I think we will just have to wait for a new version of Gradle compatible with Kotlin 2.1.0.

[gastaldi]

Probably related to gradle/gradle#31549