Use new Kotlin/JS plugin (Kotlin#1983)

* Use new Kotlin/JS plugin
* Support legacy DCE mode for 1.4-M2

Author: turansky

build.gradle

@@ -252,7 +252,7 @@ configure(subprojects.findAll { it.name != coreModule && it.name != rootModule }
 }
 
 // Redefine source sets because we are not using 'kotlin/main/fqn' folder convention
-configure(subprojects.findAll { !sourceless.contains(it.name) && it.name != "benchmarks" && it.name != coreModule }) {
+configure(subprojects.findAll { !sourceless.contains(it.name) && it.name != "benchmarks" && it.name != 'example-frontend-js' && it.name != coreModule }) {
     sourceSets {
         main.kotlin.srcDirs = ['src']
         test.kotlin.srcDirs = ['test']

gradle/compile-js.gradle

@@ -4,22 +4,29 @@
 
 // Platform-specific configuration to compile JS modules
 
-apply plugin: 'kotlin2js'
+apply plugin: 'org.jetbrains.kotlin.js'
+
+kotlin.sourceSets {
+    main.kotlin.srcDirs = ['src']
+    test.kotlin.srcDirs = ['test']
+    main.resources.srcDirs = ['resources']
+    test.resources.srcDirs = ['test-resources']
+}
 
 dependencies {
     compile "org.jetbrains.kotlin:kotlin-stdlib-js:$kotlin_version"
     testCompile "org.jetbrains.kotlin:kotlin-test-js:$kotlin_version"
 }
 
-tasks.withType(compileKotlin2Js.getClass()) {
+tasks.withType(compileKotlinJs.getClass()) {
     kotlinOptions {
         moduleKind = "umd"
         sourceMap = true
         metaInfo = true
     }
 }
 
-compileKotlin2Js {
+compileKotlinJs {
     kotlinOptions {
         // drop -js suffix from outputFile
         def baseName = project.name - "-js"

js/example-frontend-js/build.gradle

@@ -5,36 +5,19 @@
 apply plugin: 'kotlin-dce-js'
 apply from: rootProject.file('gradle/node-js.gradle')
 
-// Workaround resolving new Gradle metadata with kotlin2js
-// TODO: Remove once KT-37188 is fixed
-try {
-    def jsCompilerType = Class.forName("org.jetbrains.kotlin.gradle.targets.js.KotlinJsCompilerAttribute")
-    def jsCompilerAttr = Attribute.of("org.jetbrains.kotlin.js.compiler", jsCompilerType)
-    project.dependencies.attributesSchema.attribute(jsCompilerAttr)
-    configurations {
-        matching {
-            it.name.endsWith("Classpath")
-        }.forEach {
-            it.attributes.attribute(jsCompilerAttr, jsCompilerType.legacy)
-        }
-    }
-} catch (java.lang.ClassNotFoundException e) {
-    // org.jetbrains.kotlin.gradle.targets.js.JsCompilerType is missing in 1.3.x
-    // But 1.3.x doesn't generate Gradle metadata, so this workaround is not needed
-}
-
 dependencies {
     compile "org.jetbrains.kotlinx:kotlinx-html-js:$html_version"
 }
 
-compileKotlin2Js {
+compileKotlinJs {
     kotlinOptions {
         main = "call"
     }
 }
 
-task bundle(type: NpmTask, dependsOn: [npmInstall, runDceKotlinJs]) {
+task bundle(type: NpmTask, dependsOn: [npmInstall, build]) {
     inputs.files(fileTree("$buildDir/kotlin-js-min/main"))
+    inputs.files(fileTree("$buildDir/kotlin-js-min/legacy/main"))
     inputs.files(fileTree(file("src/main/web")))
     inputs.file("npm/webpack.config.js")
     outputs.dir("$buildDir/dist")
@@ -44,11 +27,3 @@ task bundle(type: NpmTask, dependsOn: [npmInstall, runDceKotlinJs]) {
 task start(type: NpmTask, dependsOn: bundle) {
     args = ["run", "start"]
 }
-
-// we have not tests but kotlin-dce-js still tries to work with them and crashed.
-// todo: Remove when KT-22028 is fixed
-afterEvaluate {
-    if (tasks.findByName('unpackDependenciesTestKotlinJs')) {
-        tasks.unpackDependenciesTestKotlinJs.enabled = false
-    }
-}

js/example-frontend-js/npm/webpack.config.js

@@ -38,6 +38,7 @@ module.exports = {
     resolve: {
         modules: [
             path.resolve(__dirname, "kotlin-js-min/main"),
+            path.resolve(__dirname, "kotlin-js-min/legacy/main"),
             path.resolve(__dirname, "../src/main/web/")
         ]
     },