[Gradle, JS] Configure compiler args for produceKotlinLibrary in IR

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

@@ -76,6 +76,8 @@ interface KotlinJsIrSubTargetDsl {
         }
     }
 
+    fun produceKotlinLibrary()
+
     val testRuns: NamedDomainObjectContainer<KotlinJsIrPlatformTestRun>
 }
 

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

@@ -49,6 +49,24 @@ abstract class KotlinJsIrSubTarget(
         }
     }
 
+    override fun produceKotlinLibrary() {
+        target.compilations
+            .matching { it.name == KotlinCompilation.TEST_COMPILATION_NAME }
+            .all {
+                it.kotlinOptions {
+                    freeCompilerArgs += listOf("-Xir-produce-klib-dir", "-Xir-produce-js")
+                }
+            }
+
+        target.compilations
+            .matching { it.name == KotlinCompilation.MAIN_COMPILATION_NAME }
+            .all {
+                it.kotlinOptions {
+                    freeCompilerArgs += listOf("-Xir-produce-klib-dir")
+                }
+            }
+    }
+
     override fun testTask(body: KotlinJsTest.() -> Unit) {
         testRuns.getByName(KotlinTargetWithTests.DEFAULT_TEST_RUN_NAME).executionTask.configure(body)
     }

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/KotlinJsIrTargetConfigurator.kt

@@ -57,6 +57,8 @@ open class KotlinJsIrTargetConfigurator(kotlinPluginVersion: String) :
                 moduleKind = "umd"
                 sourceMap = true
                 sourceMapEmbedSources = null
+
+                freeCompilerArgs += listOf("-Xir-only")
             }
         }
     }