[Gradle, JS] Publish with 2 variants

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

@@ -7,12 +7,15 @@ package org.jetbrains.kotlin.gradle.targets.js
 
 import org.gradle.api.NamedDomainObjectContainer
 import org.gradle.api.Project
+import org.gradle.api.artifacts.ConfigurablePublishArtifact
+import org.gradle.api.artifacts.Dependency
+import org.gradle.api.attributes.Usage
 import org.gradle.api.tasks.TaskProvider
+import org.jetbrains.kotlin.gradle.dsl.KotlinMultiplatformExtension
+import org.jetbrains.kotlin.gradle.dsl.kotlinExtension
+import org.jetbrains.kotlin.gradle.plugin.*
 import org.jetbrains.kotlin.gradle.plugin.AbstractKotlinTargetConfigurator.Companion.runTaskNameSuffix
-import org.jetbrains.kotlin.gradle.plugin.KotlinPlatformType
-import org.jetbrains.kotlin.gradle.plugin.KotlinTargetWithTests
-import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinJsCompilation
-import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinOnlyTarget
+import org.jetbrains.kotlin.gradle.plugin.mpp.*
 import org.jetbrains.kotlin.gradle.targets.js.dsl.KotlinJsBrowserDsl
 import org.jetbrains.kotlin.gradle.targets.js.dsl.KotlinJsNodeDsl
 import org.jetbrains.kotlin.gradle.targets.js.dsl.KotlinJsTargetDsl
@@ -22,6 +25,7 @@ import org.jetbrains.kotlin.gradle.targets.js.subtargets.KotlinNodeJs
 import org.jetbrains.kotlin.gradle.tasks.locateTask
 import org.jetbrains.kotlin.gradle.testing.internal.KotlinTestReport
 import org.jetbrains.kotlin.gradle.testing.testTaskName
+import org.jetbrains.kotlin.gradle.utils.isGradleVersionAtLeast
 import org.jetbrains.kotlin.gradle.utils.lowerCamelCaseName
 import javax.inject.Inject
 
@@ -37,6 +41,53 @@ constructor(
     override lateinit var testRuns: NamedDomainObjectContainer<KotlinJsReportAggregatingTestRun>
         internal set
 
+    override val kotlinComponents: Set<KotlinTargetComponent> by lazy {
+        if (irTarget == null)
+            super.kotlinComponents
+        else {
+            val usageContexts = mutableSetOf<DefaultKotlinUsageContext>()
+
+            // This usage value is only needed for Maven scope mapping. Don't replace it with a custom Kotlin Usage value
+            val javaApiUsage = project.usageByName(if (isGradleVersionAtLeast(5, 3)) "java-api-jars" else Usage.JAVA_API)
+
+            usageContexts += run {
+                DefaultKotlinUsageContext(
+                    compilations.getByName(KotlinCompilation.MAIN_COMPILATION_NAME),
+                    javaApiUsage,
+                    apiElementsConfigurationName
+                )
+            }
+
+            usageContexts += run {
+                DefaultKotlinUsageContext(
+                    irTarget!!.compilations.getByName(KotlinCompilation.MAIN_COMPILATION_NAME),
+                    javaApiUsage,
+                    irTarget!!.apiElementsConfigurationName
+                )
+            }
+
+            val componentName =
+                if (project.kotlinExtension is KotlinMultiplatformExtension)
+                    targetName
+                else PRIMARY_SINGLE_COMPONENT_NAME
+
+            val component =
+                createKotlinVariant(componentName, compilations.getByName(KotlinCompilation.MAIN_COMPILATION_NAME), usageContexts)
+
+            val sourcesJarTask =
+                sourcesJarTask(project, lazy { project.kotlinExtension.sourceSets.toSet() }, null, targetName.toLowerCase())
+
+            component.sourcesArtifacts = setOf(
+                project.artifacts.add(Dependency.ARCHIVES_CONFIGURATION, sourcesJarTask).apply {
+                    this as ConfigurablePublishArtifact
+                    classifier = "sources"
+                }
+            )
+
+            setOf(component)
+        }
+    }
+
     var irTarget: KotlinJsIrTarget? = null
 
     val testTaskName get() = testRuns.getByName(KotlinTargetWithTests.DEFAULT_TEST_RUN_NAME).testTaskName