[Gradle, JS] Throw error in JS part when plugins goes from different classloaders

^KT-39210 fixed
^KT-31669 fixed

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KotlinGradleBuildServices.kt

@@ -133,7 +133,7 @@ internal class KotlinGradleBuildServices private constructor(
         val onRegister = {
             gradle.taskGraph.whenReady {
                 if (multipleProjectsHolder.isInMultipleProjects(project, kotlinPluginVersion)) {
-                    val loadedInProjects = multipleProjectsHolder.getAffectedProjects(project, kotlinPluginVersion)
+                    val loadedInProjects = multipleProjectsHolder.getAffectedProjects(project, kotlinPluginVersion)!!
                     if (PropertiesProvider(project).ignorePluginLoadedInMultipleProjects != true) {
                         project.logger.warn(MULTIPLE_KOTLIN_PLUGINS_LOADED_WARNING)
                         project.logger.warn(

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KotlinPluginInMultipleProjectsHolder.kt

@@ -16,22 +16,13 @@ internal class KotlinPluginInMultipleProjectsHolder(
     fun addProject(
         project: Project,
         kotlinPluginVersion: String? = null,
-        onRegister: () -> Unit
+        onRegister: () -> Unit = {}
     ) {
         require(differentVersionsInDifferentProject == (kotlinPluginVersion != null))
 
         val projectPath = project.path
 
-        val loadedInProjectsPropertyName = listOf(
-            "kotlin",
-            "plugin",
-            "loaded",
-            "in",
-            "projects",
-            kotlinPluginVersion
-        )
-            .filterNotNull()
-            .joinToString(".")
+        val loadedInProjectsPropertyName = getPropertyName(kotlinPluginVersion)
 
         if (!differentVersionsInDifferentProject || loadedInProjectPath == null) {
             loadedInProjectPath = projectPath
@@ -52,29 +43,47 @@ internal class KotlinPluginInMultipleProjectsHolder(
         kotlinPluginVersion: String? = null
     ): Boolean {
         require(differentVersionsInDifferentProject == (kotlinPluginVersion != null))
-        return getAffectedProjects(project, kotlinPluginVersion).size > 1
+        return getAffectedProjects(project, kotlinPluginVersion)?.let {
+            it.size > 1
+        } ?: false
     }
 
     fun getAffectedProjects(
         project: Project,
         kotlinPluginVersion: String? = null
-    ): List<String> {
+    ): List<String>? {
         require(differentVersionsInDifferentProject == (kotlinPluginVersion != null))
 
         val ext = getExt(project)
 
-        val loadedInProjectsPropertyName = "kotlin.plugin.loaded.in.projects.${kotlinPluginVersion}"
+        val propertyName = getPropertyName(kotlinPluginVersion)
 
-        return (ext.get(loadedInProjectsPropertyName) as String).split(";")
+        if (!ext.has(propertyName)) {
+            return null
+        }
+
+        return (ext.get(propertyName) as String).split(";")
     }
 
     private fun getExt(project: Project): ExtraPropertiesExtension {
         return project.rootProject.extensions.getByType(ExtraPropertiesExtension::class.java)
     }
+
+    private fun getPropertyName(version: String?): String {
+        return listOfNotNull(
+            "kotlin",
+            "plugin",
+            "loaded",
+            "in",
+            "projects",
+            version
+        )
+            .joinToString(".")
+    }
 }
 
 const val MULTIPLE_KOTLIN_PLUGINS_LOADED_WARNING: String =
-    "\nThe Kotlin Gradle plugin was loaded multiple times in different subprojects, which is not supported and may break the build. \n" +
+    "The Kotlin Gradle plugin was loaded multiple times in different subprojects, which is not supported and may break the build. \n" +
 
             "This might happen in subprojects that apply the Kotlin plugins with the Gradle 'plugins { ... }' DSL if they specify " +
             "explicit versions, even if the versions are equal.\n" +

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/KotlinJsIrSubTarget.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
@@ -10,10 +10,7 @@ import org.gradle.api.Task
 import org.gradle.api.plugins.ExtensionAware
 import org.gradle.api.tasks.TaskProvider
 import org.gradle.language.base.plugins.LifecycleBasePlugin
-import org.jetbrains.kotlin.gradle.plugin.AbstractKotlinTargetConfigurator
-import org.jetbrains.kotlin.gradle.plugin.KotlinCompilation
-import org.jetbrains.kotlin.gradle.plugin.KotlinTargetWithTests
-import org.jetbrains.kotlin.gradle.plugin.whenEvaluated
+import org.jetbrains.kotlin.gradle.plugin.*
 import org.jetbrains.kotlin.gradle.targets.js.KotlinJsPlatformTestRun
 import org.jetbrains.kotlin.gradle.targets.js.dsl.KotlinJsBinaryType
 import org.jetbrains.kotlin.gradle.targets.js.dsl.KotlinJsSubTargetDsl
@@ -31,6 +28,23 @@ abstract class KotlinJsIrSubTarget(
     private val disambiguationClassifier: String
 ) : KotlinJsSubTargetDsl {
     val project get() = target.project
+
+    init {
+        val kotlinPluginInMultipleProjectsHolder = KotlinPluginInMultipleProjectsHolder(
+            differentVersionsInDifferentProject = false
+        )
+
+        val anyProjectAffected = kotlinPluginInMultipleProjectsHolder.getAffectedProjects(project)
+            ?.isNotEmpty() ?: false
+
+        if (anyProjectAffected) {
+            error(MULTIPLE_KOTLIN_PLUGINS_LOADED_WARNING)
+        }
+
+        kotlinPluginInMultipleProjectsHolder
+            .addProject(project)
+    }
+
     private val nodeJs = NodeJsRootPlugin.apply(project.rootProject)
 
     abstract val testTaskDescription: String

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/subtargets/KotlinJsSubTarget.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
@@ -10,11 +10,8 @@ import org.gradle.api.Task
 import org.gradle.api.plugins.ExtensionAware
 import org.gradle.api.tasks.TaskProvider
 import org.gradle.language.base.plugins.LifecycleBasePlugin
-import org.jetbrains.kotlin.gradle.plugin.AbstractKotlinTargetConfigurator
-import org.jetbrains.kotlin.gradle.plugin.KotlinCompilation
-import org.jetbrains.kotlin.gradle.plugin.KotlinTargetWithTests
+import org.jetbrains.kotlin.gradle.plugin.*
 import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinJsCompilation
-import org.jetbrains.kotlin.gradle.plugin.whenEvaluated
 import org.jetbrains.kotlin.gradle.targets.js.KotlinJsPlatformTestRun
 import org.jetbrains.kotlin.gradle.targets.js.KotlinJsTarget
 import org.jetbrains.kotlin.gradle.targets.js.dsl.KotlinJsSubTargetDsl
@@ -33,6 +30,23 @@ abstract class KotlinJsSubTarget(
     private val disambiguationClassifier: String
 ) : KotlinJsSubTargetDsl {
     val project get() = target.project
+
+    init {
+        val kotlinPluginInMultipleProjectsHolder = KotlinPluginInMultipleProjectsHolder(
+            differentVersionsInDifferentProject = false
+        )
+
+        val anyProjectAffected = kotlinPluginInMultipleProjectsHolder.getAffectedProjects(project)
+            ?.isNotEmpty() ?: false
+
+        if (anyProjectAffected) {
+            error(MULTIPLE_KOTLIN_PLUGINS_LOADED_WARNING)
+        }
+
+        kotlinPluginInMultipleProjectsHolder
+            .addProject(project)
+    }
+
     private val nodeJs = NodeJsRootPlugin.apply(project.rootProject)
 
     abstract val testTaskDescription: String