[Gradle, JS] Add possibility to configure dce task

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

@@ -13,6 +13,7 @@ import org.jetbrains.kotlin.gradle.targets.js.KotlinJsReportAggregatingTestRun
 import org.jetbrains.kotlin.gradle.targets.js.nodejs.NodeJsExec
 import org.jetbrains.kotlin.gradle.targets.js.testing.KotlinJsTest
 import org.jetbrains.kotlin.gradle.targets.js.webpack.KotlinWebpack
+import org.jetbrains.kotlin.gradle.tasks.KotlinJsDce
 
 interface KotlinJsTargetDsl {
     fun browser() = browser { }
@@ -59,6 +60,13 @@ interface KotlinJsBrowserDsl : KotlinJsSubTargetDsl {
             ConfigureUtil.configure(fn, this)
         }
     }
+
+    fun dceTask(body: KotlinJsDce.() -> Unit)
+    fun dceTask(fn: Closure<*>) {
+        dceTask {
+            ConfigureUtil.configure(fn, this)
+        }
+    }
 }
 
 interface KotlinJsNodeDsl : KotlinJsSubTargetDsl {

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

@@ -31,6 +31,7 @@ open class KotlinBrowserJs @Inject constructor(target: KotlinJsTarget) :
     KotlinJsSubTarget(target, "browser"),
     KotlinJsBrowserDsl {
 
+    private val dceConfigurations: MutableList<KotlinJsDce.() -> Unit> = mutableListOf()
     private val dceWebpackEntryAppliers: MutableList<KotlinJsDce.(File) -> Unit> = mutableListOf()
     private lateinit var dceTaskProvider: TaskProvider<KotlinJsDce>
 
@@ -55,6 +56,10 @@ open class KotlinBrowserJs @Inject constructor(target: KotlinJsTarget) :
         (project.tasks.getByName(webpackTaskName) as KotlinWebpack).body()
     }
 
+    override fun dceTask(body: KotlinJsDce.() -> Unit) {
+        dceConfigurations.add(body)
+    }
+
     override fun configureRun(compilation: KotlinJsCompilation) {
 
         val project = compilation.target.project
@@ -172,6 +177,10 @@ open class KotlinBrowserJs @Inject constructor(target: KotlinJsTarget) :
         val kotlinTask = compilation.compileKotlinTask
 
         return project.registerTask<KotlinJsDce>(dceTaskName) {
+            dceConfigurations.forEach { configuration ->
+                it.configuration()
+            }
+
             it.dependsOn(kotlinTask)
 
             it.classpath = project.configurations.getByName(compilation.compileDependencyConfigurationName)