[Gradle, JS] Check if resourcesDir exists and resourceDir is input directory

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

@@ -182,13 +182,16 @@ open class KotlinBrowserJs @Inject constructor(target: KotlinJsTarget) :
                 }
 
                 it.doLast { _ ->
-                    compilation.output.resourcesDir
+                    val resourcesDir = compilation.output.resourcesDir
+                    if (resourcesDir.exists()) {
+                        resourcesDir
                             .copyRecursively(
                                 target = it.destinationDirectory!!,
                                 overwrite = true
                             )
                     }
                 }
+            }
 
             if (kind == BuildVariantKind.PRODUCTION) {
                 project.tasks.getByName(LifecycleBasePlugin.ASSEMBLE_TASK_NAME).dependsOn(webpackTask)

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

@@ -101,6 +101,16 @@ open class KotlinWebpack : DefaultTask(), RequiresNpmDependencies {
     open val evaluatedConfigFile: File
         @OutputFile get() = reportDir.resolve("webpack.config.evaluated.js")
 
+    val resourcesDir: File?
+        @Optional
+        @InputDirectory
+        get() {
+            val resourcesDir = compilation.output.resourcesDir
+            return if (resourcesDir.exists()) {
+                resourcesDir
+            } else null
+        }
+
     @Input
     var bin: String = "webpack/bin/webpack.js"