[K/JS] Introduce v2015 target

libraries/tools/kotlin-gradle-plugin-api/api/kotlin-gradle-plugin-api.api

@@ -336,7 +336,7 @@ public abstract interface class org/jetbrains/kotlin/gradle/dsl/KotlinJsOptions
 	public abstract fun getSourceMapPrefix ()Ljava/lang/String;
 	public abstract fun getTarget ()Ljava/lang/String;
 	public abstract fun getTypedArrays ()Z
-	public abstract fun getUseEsClasses ()Z
+	public abstract fun getUseEsClasses ()Ljava/lang/Boolean;
 	public abstract fun setFriendModulesDisabled (Z)V
 	public abstract fun setMain (Ljava/lang/String;)V
 	public abstract fun setMetaInfo (Z)V
@@ -349,7 +349,7 @@ public abstract interface class org/jetbrains/kotlin/gradle/dsl/KotlinJsOptions
 	public abstract fun setSourceMapPrefix (Ljava/lang/String;)V
 	public abstract fun setTarget (Ljava/lang/String;)V
 	public abstract fun setTypedArrays (Z)V
-	public abstract fun setUseEsClasses (Z)V
+	public abstract fun setUseEsClasses (Ljava/lang/Boolean;)V
 }
 
 public final class org/jetbrains/kotlin/gradle/dsl/KotlinJsOptions$DefaultImpls {
@@ -370,7 +370,7 @@ public final class org/jetbrains/kotlin/gradle/dsl/KotlinJsOptions$DefaultImpls
 	public static fun getSuppressWarnings (Lorg/jetbrains/kotlin/gradle/dsl/KotlinJsOptions;)Z
 	public static fun getTarget (Lorg/jetbrains/kotlin/gradle/dsl/KotlinJsOptions;)Ljava/lang/String;
 	public static fun getTypedArrays (Lorg/jetbrains/kotlin/gradle/dsl/KotlinJsOptions;)Z
-	public static fun getUseEsClasses (Lorg/jetbrains/kotlin/gradle/dsl/KotlinJsOptions;)Z
+	public static fun getUseEsClasses (Lorg/jetbrains/kotlin/gradle/dsl/KotlinJsOptions;)Ljava/lang/Boolean;
 	public static fun getUseK2 (Lorg/jetbrains/kotlin/gradle/dsl/KotlinJsOptions;)Z
 	public static fun getVerbose (Lorg/jetbrains/kotlin/gradle/dsl/KotlinJsOptions;)Z
 	public static fun setAllWarningsAsErrors (Lorg/jetbrains/kotlin/gradle/dsl/KotlinJsOptions;Z)V
@@ -390,7 +390,7 @@ public final class org/jetbrains/kotlin/gradle/dsl/KotlinJsOptions$DefaultImpls
 	public static fun setSuppressWarnings (Lorg/jetbrains/kotlin/gradle/dsl/KotlinJsOptions;Z)V
 	public static fun setTarget (Lorg/jetbrains/kotlin/gradle/dsl/KotlinJsOptions;Ljava/lang/String;)V
 	public static fun setTypedArrays (Lorg/jetbrains/kotlin/gradle/dsl/KotlinJsOptions;Z)V
-	public static fun setUseEsClasses (Lorg/jetbrains/kotlin/gradle/dsl/KotlinJsOptions;Z)V
+	public static fun setUseEsClasses (Lorg/jetbrains/kotlin/gradle/dsl/KotlinJsOptions;Ljava/lang/Boolean;)V
 	public static fun setUseK2 (Lorg/jetbrains/kotlin/gradle/dsl/KotlinJsOptions;Z)V
 	public static fun setVerbose (Lorg/jetbrains/kotlin/gradle/dsl/KotlinJsOptions;Z)V
 }

libraries/tools/kotlin-gradle-plugin-api/src/common/kotlin/org/jetbrains/kotlin/gradle/dsl/KotlinJsCompilerOptions.kt

@@ -38,12 +38,13 @@ interface KotlinJsCompilerOptions : org.jetbrains.kotlin.gradle.dsl.KotlinCommon
     val metaInfo: org.gradle.api.provider.Property<kotlin.Boolean>
 
     /**
-     * The kind of JS module generated by the compiler.
+     * The kind of JS module generated by the compiler. ES modules are enabled by default in case of ES2015 target usage
      *
      * Possible values: "plain", "amd", "commonjs", "umd"
      *
-     * Default value: JsModuleKind.MODULE_PLAIN
+     * Default value: null
      */
+    @get:org.gradle.api.tasks.Optional
     @get:org.gradle.api.tasks.Input
     val moduleKind: org.gradle.api.provider.Property<org.jetbrains.kotlin.gradle.dsl.JsModuleKind>
 
@@ -107,9 +108,9 @@ interface KotlinJsCompilerOptions : org.jetbrains.kotlin.gradle.dsl.KotlinCommon
     /**
      * Generate JS files for the specified ECMA version.
      *
-     * Possible values: "v5"
+     * Possible values: "es5", "es2015"
      *
-     * Default value: "v5"
+     * Default value: "es5"
      */
     @get:org.gradle.api.tasks.Input
     val target: org.gradle.api.provider.Property<kotlin.String>
@@ -123,10 +124,11 @@ interface KotlinJsCompilerOptions : org.jetbrains.kotlin.gradle.dsl.KotlinCommon
     val typedArrays: org.gradle.api.provider.Property<kotlin.Boolean>
 
     /**
-     * Let generated JavaScript code use ES2015 classes.
+     * Let generated JavaScript code use ES2015 classes. Enabled by default in case of ES2015 target usage
      *
-     * Default value: false
+     * Default value: null
      */
+    @get:org.gradle.api.tasks.Optional
     @get:org.gradle.api.tasks.Input
     val useEsClasses: org.gradle.api.provider.Property<kotlin.Boolean>
 }

libraries/tools/kotlin-gradle-plugin-api/src/common/kotlin/org/jetbrains/kotlin/gradle/dsl/KotlinJsOptions.kt

@@ -51,19 +51,19 @@ interface KotlinJsOptions : org.jetbrains.kotlin.gradle.dsl.KotlinCommonOptions
         get() = options.metaInfo.get()
         set(value) = options.metaInfo.set(value)
 
-    private val kotlin.String.moduleKindCompilerOption get() = org.jetbrains.kotlin.gradle.dsl.JsModuleKind.fromKind(this)
+    private val kotlin.String?.moduleKindCompilerOption get() = this?.let { org.jetbrains.kotlin.gradle.dsl.JsModuleKind.fromKind(it) }
 
-    private val org.jetbrains.kotlin.gradle.dsl.JsModuleKind.moduleKindKotlinOption get() = this.kind
+    private val org.jetbrains.kotlin.gradle.dsl.JsModuleKind?.moduleKindKotlinOption get() = this?.kind
 
     /**
-     * The kind of JS module generated by the compiler.
+     * The kind of JS module generated by the compiler. ES modules are enabled by default in case of ES2015 target usage
      *
      * Possible values: "plain", "amd", "commonjs", "umd"
      *
-     * Default value: JsModuleKind.MODULE_PLAIN
+     * Default value: null
      */
-    var moduleKind: kotlin.String
-        get() = options.moduleKind.get().moduleKindKotlinOption
+    var moduleKind: kotlin.String?
+        get() = options.moduleKind.orNull.moduleKindKotlinOption
         set(value) = options.moduleKind.set(value.moduleKindCompilerOption)
 
     /**
@@ -136,9 +136,9 @@ interface KotlinJsOptions : org.jetbrains.kotlin.gradle.dsl.KotlinCommonOptions
     /**
      * Generate JS files for the specified ECMA version.
      *
-     * Possible values: "v5"
+     * Possible values: "es5", "es2015"
      *
-     * Default value: "v5"
+     * Default value: "es5"
      */
     var target: kotlin.String
         get() = options.target.get()
@@ -154,11 +154,11 @@ interface KotlinJsOptions : org.jetbrains.kotlin.gradle.dsl.KotlinCommonOptions
         set(value) = options.typedArrays.set(value)
 
     /**
-     * Let generated JavaScript code use ES2015 classes.
+     * Let generated JavaScript code use ES2015 classes. Enabled by default in case of ES2015 target usage
      *
-     * Default value: false
+     * Default value: null
      */
-    var useEsClasses: kotlin.Boolean
-        get() = options.useEsClasses.get()
+    var useEsClasses: kotlin.Boolean?
+        get() = options.useEsClasses.orNull
         set(value) = options.useEsClasses.set(value)
 }