[Gradle, JS] Extension for outputFileProperty

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/KotlinJsIrLink.kt

@@ -56,6 +56,10 @@ abstract class KotlinJsIrLink @Inject constructor(
         return !entryModule.get().asFile.exists()
     }
 
+    val platformType by lazy {
+        compilation.platformType
+    }
+
     @Transient
     @get:Internal
     internal lateinit var compilation: KotlinCompilationData<*>
@@ -147,3 +151,16 @@ abstract class KotlinJsIrLink @Inject constructor(
             .filterNot { it.isEmpty() }
     }
 }
+
+val KotlinPlatformType.fileExtension
+    get() = when (this) {
+        KotlinPlatformType.wasm -> {
+            ".mjs"
+        }
+
+        KotlinPlatformType.js -> {
+            ".js"
+        }
+
+        else -> error("Only JS and WASM supported for KotlinJsTest")
+    }

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/KotlinJsIrSubTarget.kt

@@ -124,22 +124,11 @@ abstract class KotlinJsIrSubTarget(
             testJs.inputFileProperty.set(
                 project.layout.file(
                     binary.linkSyncTask.flatMap { copyTask ->
-                        val extension = when (compilation.platformType) {
-                            KotlinPlatformType.wasm -> {
-                                ".mjs"
-                            }
-
-                            KotlinPlatformType.js -> {
-                                ".js"
-                            }
-
-                            else -> error("Only JS and WASM supported for KotlinJsTest")
-                        }
                         binary.linkTask
                             .flatMap { linkTask -> linkTask.compilerOptions.moduleName }
                             .map { outputName ->
                                 copyTask.destinationDir
-                                    .resolve(outputName + extension)
+                                    .resolve(outputName + compilation.platformType.fileExtension)
                             }
                     }
                 )

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/tasks/Tasks.kt

@@ -1006,6 +1006,12 @@ abstract class Kotlin2JsCompile @Inject constructor(
         (compilerOptions as CompilerJsOptionsDefault).fillDefaultValues(args)
         super.setupCompilerArgs(args, defaultsOnly = defaultsOnly, ignoreClasspathResolutionErrors = ignoreClasspathResolutionErrors)
 
+        if (defaultsOnly) return
+
+        (compilerOptions as CompilerJsOptionsDefault).fillCompilerArguments(args)
+        if (!args.sourceMapPrefix.isNullOrEmpty()) {
+            args.sourceMapBaseDirs = sourceMapBaseDir.get().asFile.absolutePath
+        }
         if (isIrBackendEnabled()) {
             val outputFilePath: String? = compilerOptions.outputFile.orNull
             if (outputFilePath != null) {
@@ -1019,15 +1025,6 @@ abstract class Kotlin2JsCompile @Inject constructor(
         } else {
             args.outputFile = outputFileProperty.get().absoluteFile.normalize().absolutePath
         }
-
-        if (defaultsOnly) return
-
-        (compilerOptions as CompilerJsOptionsDefault).fillCompilerArguments(args)
-        if (!args.sourceMapPrefix.isNullOrEmpty()) {
-            args.sourceMapBaseDirs = sourceMapBaseDir.get().asFile.absolutePath
-        }
-        // Rewriting default outputFile property back to outputFilePropertyValue
-        args.outputFile = outputFileProperty.get().absoluteFile.normalize().absolutePath
         // Overriding freeArgs from compilerOptions with enhanced one + additional one set on execution phase
         // containing additional arguments based on the js compilation configuration
         args.freeArgs = enhancedFreeCompilerArgs.get().union(additionalFreeCompilerArgs).toList()

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/tasks/configuration/Kotlin2JsCompileConfig.kt

@@ -13,6 +13,7 @@ import org.jetbrains.kotlin.gradle.targets.js.ir.PRODUCE_UNZIPPED_KLIB
 import org.jetbrains.kotlin.gradle.targets.js.ir.PRODUCE_ZIPPED_KLIB
 import org.jetbrains.kotlin.gradle.tasks.Kotlin2JsCompile
 import org.jetbrains.kotlin.gradle.utils.klibModuleName
+import java.io.File
 
 internal typealias Kotlin2JsCompileConfig = BaseKotlin2JsCompileConfig<Kotlin2JsCompile>
 
@@ -39,8 +40,12 @@ internal open class BaseKotlin2JsCompileConfig<TASK : Kotlin2JsCompile>(
             @Suppress("DEPRECATION")
             task.outputFileProperty.value(
                 task.destinationDirectory.flatMap { dir ->
-                    task.compilerOptions.moduleName.map { name ->
+                    if (task.compilerOptions.outputFile.orNull != null) {
-                        dir.file(name).asFile
+                        task.compilerOptions.outputFile.map { File(it) }
+                    } else {
+                        task.compilerOptions.moduleName.map { name ->
+                            dir.file(name + compilation.platformType.fileExtension).asFile
+                        }
                     }
                 }
             )