[JetBrains] Make backend-plugin compatible with 2025.2

components/ide/jetbrains/backend-plugin/build.gradle-latest.kts

@@ -12,9 +12,9 @@ plugins {
     // Java support
     id("java")
     // Kotlin support - check the latest version at https://plugins.gradle.org/plugin/org.jetbrains.kotlin.jvm
-    id("org.jetbrains.kotlin.jvm") version "2.0.0"
+    id("org.jetbrains.kotlin.jvm") version "2.2.0-RC"
     // gradle-intellij-plugin - read more: https://github.com/JetBrains/gradle-intellij-plugin
-    id("org.jetbrains.intellij.platform") version "2.0.0-beta8"
+    id("org.jetbrains.intellij.platform") version "2.6.0"
 //    id("org.jetbrains.intellij.platform.migration") version "2.0.0-beta7"
     // detekt linter - read more: https://detekt.github.io/detekt/gradle.html
     id("io.gitlab.arturbosch.detekt") version "1.23.6"
@@ -158,7 +158,9 @@ tasks {
         targetCompatibility = "21"
     }
     withType<KotlinCompile> {
-        kotlinOptions.jvmTarget = "21"
+        compilerOptions {
+            jvmTarget.set(org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_21)
+        }
     }
 
     buildSearchableOptions {
@@ -175,8 +177,8 @@ tasks {
 
 tasks.register("runPluginVerifier") {
     if (properties("platformType") == "RD") {
-        intellijPlatform.verifyPlugin.ides.ide(IntelliJPlatformType.Rider, properties("pluginVerifierIdeVersions"))
+        intellijPlatform.pluginVerification.ides.ide(IntelliJPlatformType.Rider, properties("pluginVerifierIdeVersions"))
     } else {
-        intellijPlatform.verifyPlugin.ides.ide(IntelliJPlatformType.IntellijIdeaUltimate, properties("pluginVerifierIdeVersions"))
+        intellijPlatform.pluginVerification.ides.ide(IntelliJPlatformType.IntellijIdeaUltimate, properties("pluginVerifierIdeVersions"))
     }
 }

components/ide/jetbrains/backend-plugin/build.gradle.kts

@@ -12,9 +12,9 @@ plugins {
     // Java support
     id("java")
     // Kotlin support - check the latest version at https://plugins.gradle.org/plugin/org.jetbrains.kotlin.jvm
-    id("org.jetbrains.kotlin.jvm") version "2.0.0"
+    id("org.jetbrains.kotlin.jvm") version "2.2.0-RC"
     // gradle-intellij-plugin - read more: https://github.com/JetBrains/gradle-intellij-plugin
-    id("org.jetbrains.intellij.platform") version "2.0.0-beta8"
+    id("org.jetbrains.intellij.platform") version "2.6.0"
 //    id("org.jetbrains.intellij.platform.migration") version "2.0.0-beta7"
     // detekt linter - read more: https://detekt.github.io/detekt/gradle.html
     id("io.gitlab.arturbosch.detekt") version "1.23.6"
@@ -158,7 +158,9 @@ tasks {
         targetCompatibility = "21"
     }
     withType<KotlinCompile> {
-        kotlinOptions.jvmTarget = "21"
+        compilerOptions {
+            jvmTarget.set(org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_21)
+        }
     }
 
     buildSearchableOptions {
@@ -175,8 +177,8 @@ tasks {
 
 tasks.register("runPluginVerifier") {
     if (properties("platformType") == "RD") {
-        intellijPlatform.verifyPlugin.ides.ide(IntelliJPlatformType.Rider, properties("pluginVerifierIdeVersions"))
+        intellijPlatform.pluginVerification.ides.ide(IntelliJPlatformType.Rider, properties("pluginVerifierIdeVersions"))
     } else {
-        intellijPlatform.verifyPlugin.ides.ide(IntelliJPlatformType.IntellijIdeaUltimate, properties("pluginVerifierIdeVersions"))
+        intellijPlatform.pluginVerification.ides.ide(IntelliJPlatformType.IntellijIdeaUltimate, properties("pluginVerifierIdeVersions"))
     }
 }

components/ide/jetbrains/backend-plugin/gradle-latest.properties

@@ -2,10 +2,10 @@
 # See https://plugins.jetbrains.com/docs/intellij/build-number-ranges.html
 # for insight into build numbers and IntelliJ Platform versions.
 # revert pluginSinceBuild if it's unnecessary
-pluginSinceBuild=251.17181
-pluginUntilBuild=251.*
+pluginSinceBuild=252.18003
+pluginUntilBuild=252.*
 # Plugin Verifier integration -> https://github.com/JetBrains/gradle-intellij-plugin#plugin-verifier-dsl
 # See https://jb.gg/intellij-platform-builds-list for available build versions.
-pluginVerifierIdeVersions=2025.1
+pluginVerifierIdeVersions=2025.2
 # Version from "com.jetbrains.intellij.idea" which can be found at https://www.jetbrains.com/updates/updates.xml or exec `./gradlew printProductsReleases`
-platformVersion=251.17181.16
+platformVersion=252.18003.27

components/ide/jetbrains/backend-plugin/gradle-stable.properties

@@ -8,4 +8,4 @@ pluginUntilBuild=251.*
 # See https://jb.gg/intellij-platform-builds-list for available build versions.
 pluginVerifierIdeVersions=2025.1
 # Version from "com.jetbrains.intellij.idea" which can be found at https://www.jetbrains.com/intellij-repository/snapshots
-platformVersion=251.25410-EAP-CANDIDATE-SNAPSHOT
+platformVersion=251.26094.98

components/ide/jetbrains/backend-plugin/src/main/kotlin/kotlinx/coroutines/guava/ListenableFuture.kt

@@ -5,8 +5,7 @@
 package kotlinx.coroutines.guava
 
 import com.google.common.util.concurrent.*
-import com.google.common.util.concurrent.internal.InternalFutureFailureAccess
-import com.google.common.util.concurrent.internal.InternalFutures
+import com.google.common.util.concurrent.internal.*
 import kotlinx.coroutines.*
 import java.util.concurrent.*
 import java.util.concurrent.CancellationException
@@ -138,10 +137,10 @@ public fun <T> ListenableFuture<T>.asDeferred(): Deferred<T> {
     // Finally, if this isn't done yet, attach a Listener that will complete the Deferred.
     val deferred = CompletableDeferred<T>()
     Futures.addCallback(this, object : FutureCallback<T> {
-        override fun onSuccess(result: T?) {
+        override fun onSuccess(result: T) {
             // Here we work with flexible types, so we unchecked cast to trick the type system
             @Suppress("UNCHECKED_CAST")
-            runCatching { deferred.complete(result as T) }
+            runCatching { deferred.complete(result) }
                 .onFailure { handleCoroutineException(EmptyCoroutineContext, it) }
         }
 
@@ -225,7 +224,7 @@ public fun <T> Deferred<T>.asListenableFuture(): ListenableFuture<T> {
  *
  * This suspend function is cancellable.
  *
- * If the [Job] of the current coroutine is cancelled or completed while this suspending function is waiting, this function
+ * If the [Job] of the current coroutine is cancelled while this suspending function is waiting, this function
  * stops waiting for the future and immediately resumes with [CancellationException][kotlinx.coroutines.CancellationException].
  *
  * This method is intended to be used with one-shot Futures, so on coroutine cancellation, the Future is cancelled as well.
@@ -247,8 +246,7 @@ public suspend fun <T> ListenableFuture<T>.await(): T {
     return suspendCancellableCoroutine { cont: CancellableContinuation<T> ->
         addListener(
             ToContinuation(this, cont),
-            MoreExecutors.directExecutor()
-        )
+            MoreExecutors.directExecutor())
         cont.invokeOnCancellation {
             cancel(false)
         }
@@ -265,7 +263,7 @@ public suspend fun <T> ListenableFuture<T>.await(): T {
 private class ToContinuation<T>(
     val futureToObserve: ListenableFuture<T>,
     val continuation: CancellableContinuation<T>
-) : Runnable {
+): Runnable {
     override fun run() {
         if (futureToObserve.isCancelled) {
             continuation.cancel()
@@ -346,7 +344,7 @@ private class ListenableFutureCoroutine<T>(
  *     could probably be compressed into one subclass of [AbstractFuture] to save an allocation, at the
  *     cost of the implementation's readability.
  */
-private class JobListenableFuture<T>(private val jobToCancel: Job) : ListenableFuture<T> {
+private class JobListenableFuture<T>(private val jobToCancel: Job): ListenableFuture<T> {
     /**
      * Serves as a state machine for [Future] cancellation.
      *
@@ -356,7 +354,7 @@ private class JobListenableFuture<T>(private val jobToCancel: Job) : ListenableF
      *
      * To preserve Coroutine's [CancellationException], this future points to either `T` or [Cancelled].
      */
-    private val auxFuture = SettableFuture.create<Any>()
+    private val auxFuture = SettableFuture.create<Any?>()
 
     /**
      * `true` if [auxFuture.get][ListenableFuture.get] throws [ExecutionException].
@@ -441,7 +439,7 @@ private class JobListenableFuture<T>(private val jobToCancel: Job) : ListenableF
     }
 
     /** See [get()]. */
-    private fun getInternal(result: Any): T = if (result is Cancelled) {
+    private fun getInternal(result: Any?): T = if (result is Cancelled) {
         throw CancellationException().initCause(result.exception)
     } else {
         // We know that `auxFuture` can contain either `T` or `Cancelled`.

components/ide/jetbrains/backend-plugin/src/test/kotlin/io/gitpod/jetbrains/remote/util/LocalHostUriTest.kt

@@ -4,12 +4,15 @@
 
 package io.gitpod.jetbrains.remote.util
 
-import com.intellij.testFramework.fixtures.BasePlatformTestCase
 import io.gitpod.jetbrains.remote.utils.LocalHostUri
 import io.gitpod.jetbrains.remote.utils.LocalHostUri.LocalHostUriMetadata
 import java.net.URI
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertTrue
 
-class LocalHostUriTest : BasePlatformTestCase() {
+internal class LocalHostUriTest {
+    @Test
     fun testExtractLocalHostUriMetaDataForPortMapping() {
         val urlToMetadataMap = mapOf(
             "https://localhost:80" to object: LocalHostUriMetadata {