[Gradle, JS] Add webpack output

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

@@ -21,6 +21,7 @@ import org.jetbrains.kotlin.gradle.targets.js.nodejs.NodeJsRootPlugin
 import org.jetbrains.kotlin.gradle.targets.js.npm.RequiresNpmDependencies
 import org.jetbrains.kotlin.gradle.targets.js.npm.npmProject
 import org.jetbrains.kotlin.gradle.targets.js.webpack.KotlinWebpackConfig.Mode
+import org.jetbrains.kotlin.gradle.targets.js.webpack.KotlinWebpackOutput.Companion.UMD
 import org.jetbrains.kotlin.gradle.testing.internal.reportsDir
 import org.jetbrains.kotlin.gradle.utils.injected
 import java.io.File
@@ -75,6 +76,12 @@ open class KotlinWebpack : DefaultTask(), RequiresNpmDependencies {
     @Input
     var saveEvaluatedConfigFile: Boolean = true
 
+    @Nested
+    val output: KotlinWebpackOutput = KotlinWebpackOutput(
+        library = baseConventions?.archivesBaseName,
+        libraryTarget = UMD
+    )
+
     @get:Internal
     @Deprecated("use destinationDirectory instead", ReplaceWith("destinationDirectory"))
     val outputPath: File
@@ -129,6 +136,7 @@ open class KotlinWebpack : DefaultTask(), RequiresNpmDependencies {
             mode = mode,
             entry = entry,
             reportEvaluatedConfigFile = if (saveEvaluatedConfigFile) evaluatedConfigFile else null,
+            output = output,
             outputPath = destinationDirectory,
             outputFileName = outputFileName,
             configDirectory = configDirectory,

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

@@ -20,6 +20,7 @@ import java.io.StringWriter
 data class KotlinWebpackConfig(
     val mode: Mode = Mode.DEVELOPMENT,
     val entry: File? = null,
+    val output: KotlinWebpackOutput? = null,
     val outputPath: File? = null,
     val outputFileName: String? = entry?.name,
     val configDirectory: File? = null,
@@ -205,7 +206,12 @@ data class KotlinWebpackConfig(
     }
 
     private fun Appendable.appendEntry() {
-        if (entry == null || outputPath == null) return
+        if (
+            entry == null
+            || outputPath == null
+            || output == null
+        )
+            return
 
         val multiEntryOutput = "${outputFileName!!.removeSuffix(".js")}-[name].js"
 
@@ -223,7 +229,9 @@ data class KotlinWebpackConfig(
                         return chunkData.chunk.name === 'main'
                             ? ${outputFileName.jsQuoted()}
                             : ${multiEntryOutput.jsQuoted()};
-                    }
+                    },
+                    library: "${output.library}",
+                    libraryTarget: "${output.libraryTarget}",
                 };
                 
             """.trimIndent()

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

@@ -0,0 +1,17 @@
+/*
+ * 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.
+ */
+
+package org.jetbrains.kotlin.gradle.targets.js.webpack
+
+import org.gradle.api.tasks.Input
+
+data class KotlinWebpackOutput(
+    @Input var library: String?,
+    @Input var libraryTarget: String?
+) {
+    companion object {
+        const val UMD = "umd"
+    }
+}