Kotlin Facet: Do not show implicit compiler arguments in "Additional arguments" field

idea/idea-maven/src/org/jetbrains/kotlin/idea/maven/KotlinMavenImporter.kt

@@ -127,8 +127,8 @@ class KotlinMavenImporter : MavenImporter(KOTLIN_PLUGIN_GROUP_ID, KOTLIN_PLUGIN_
         with(kotlinFacet.configuration.settings) {
             versionInfo.apiLevel = apiVersion
         }
-        parseCompilerArgumentsToFacet(sharedArguments, kotlinFacet)
-        parseCompilerArgumentsToFacet(executionArguments, kotlinFacet)
+        parseCompilerArgumentsToFacet(sharedArguments, emptyList(), kotlinFacet)
+        parseCompilerArgumentsToFacet(executionArguments, emptyList(), kotlinFacet)
         MavenProjectImportHandler.getInstances(module.project).forEach { it(kotlinFacet, mavenProject) }
     }
 

idea/kotlin-gradle-tooling/src/KotlinGradleModelBuilder.kt

@@ -25,13 +25,15 @@ import java.lang.Exception
 
 interface KotlinGradleModel : Serializable {
     val implements: String?
-    val serializedCompilerArguments: List<String>?
+    val currentCompilerArguments: List<String>?
+    val defaultCompilerArguments: List<String>?
     val coroutines: String?
 }
 
 class KotlinGradleModelImpl(
         override val implements: String?,
-        override val serializedCompilerArguments: List<String>?,
+        override val currentCompilerArguments: List<String>?,
+        override val defaultCompilerArguments: List<String>?,
         override val coroutines: String?
 ) : KotlinGradleModel
 
@@ -56,11 +58,11 @@ class KotlinGradleModelBuilder : ModelBuilderService {
     }
 
     @Suppress("UNCHECKED_CAST")
-    private fun getCompilerArguments(project: Project): List<String>? {
+    private fun getCompilerArguments(project: Project, methodName: String): List<String>? {
         val compileTask = compileTasks.mapNotNull { project.getTasksByName(it, false).firstOrNull() }.firstOrNull() ?: return null
         val taskClass = compileTask.javaClass
         return try {
-            taskClass.getDeclaredMethod("getSerializedCompilerArguments").invoke(compileTask) as List<String>
+            taskClass.getDeclaredMethod(methodName).invoke(compileTask) as List<String>
         }
         catch (e : NoSuchMethodException) {
             null
@@ -85,5 +87,10 @@ class KotlinGradleModelBuilder : ModelBuilderService {
     }
 
     override fun buildAll(modelName: String?, project: Project) =
-            KotlinGradleModelImpl(getImplements(project), getCompilerArguments(project), getCoroutines(project))
+            KotlinGradleModelImpl(
+                    getImplements(project),
+                    getCompilerArguments(project, "getSerializedCompilerArguments"),
+                    getCompilerArguments(project, "getDefaultSerializedCompilerArguments"),
+                    getCoroutines(project)
+            )
 }

idea/src/org/jetbrains/kotlin/idea/configuration/KotlinGradleProjectResolverExtension.kt

@@ -33,7 +33,8 @@ import org.jetbrains.plugins.gradle.model.data.GradleSourceSetData
 import org.jetbrains.plugins.gradle.service.project.AbstractProjectResolverExtension
 import org.jetbrains.plugins.gradle.service.project.GradleProjectResolverUtil.getModuleId
 
-var DataNode<ModuleData>.serializedCompilerArguments by UserDataProperty(Key.create<List<String>>("SERIALIZED_COMPILER_ARGUMENTS"))
+var DataNode<ModuleData>.currentCompilerArguments by UserDataProperty(Key.create<List<String>>("CURRENT_COMPILER_ARGUMENTS"))
+var DataNode<ModuleData>.defaultCompilerArguments by UserDataProperty(Key.create<List<String>>("DEFAULT_COMPILER_ARGUMENTS"))
 var DataNode<ModuleData>.coroutines by UserDataProperty(Key.create<String>("KOTLIN_COROUTINES"))
 
 class KotlinGradleProjectResolverExtension : AbstractProjectResolverExtension() {
@@ -60,7 +61,8 @@ class KotlinGradleProjectResolverExtension : AbstractProjectResolverExtension()
             }
         }
 
-        ideModule.serializedCompilerArguments = gradleModel.serializedCompilerArguments
+        ideModule.currentCompilerArguments = gradleModel.currentCompilerArguments
+        ideModule.defaultCompilerArguments = gradleModel.defaultCompilerArguments
         ideModule.coroutines = gradleModel.coroutines
 
         super.populateModuleDependencies(gradleModule, ideModule, ideProject)

idea/src/org/jetbrains/kotlin/idea/configuration/KotlinGradleSourceSetDataService.kt

@@ -121,7 +121,11 @@ private fun configureFacetByGradleModule(
     val kotlinFacet = ideModule.getOrCreateFacet(modelsProvider, false)
     kotlinFacet.configureFacet(compilerVersion, coroutinesProperty, platformKind, modelsProvider)
 
-    moduleNode.serializedCompilerArguments?.let { parseCompilerArgumentsToFacet(it, kotlinFacet) }
+    val currentCompilerArguments = moduleNode.currentCompilerArguments
+    val defaultCompilerArguments = moduleNode.defaultCompilerArguments ?: emptyList()
+    if (currentCompilerArguments != null) {
+        parseCompilerArgumentsToFacet(currentCompilerArguments, defaultCompilerArguments, kotlinFacet)
+    }
 
     return kotlinFacet
 }

idea/src/org/jetbrains/kotlin/idea/facet/facetUtils.kt

@@ -35,6 +35,7 @@ import org.jetbrains.kotlin.idea.compiler.configuration.KotlinCompilerSettings
 import org.jetbrains.kotlin.idea.framework.JSLibraryStdPresentationProvider
 import org.jetbrains.kotlin.idea.framework.JavaRuntimePresentationProvider
 import org.jetbrains.kotlin.idea.versions.*
+import java.lang.reflect.Field
 
 private fun getRuntimeLibraryVersions(
         module: Module,
@@ -207,7 +208,7 @@ private val CommonCompilerArguments.exposedFields: List<String>
         else -> commonExposedFields
     }
 
-fun parseCompilerArgumentsToFacet(arguments: List<String>, kotlinFacet: KotlinFacet) {
+fun parseCompilerArgumentsToFacet(arguments: List<String>, defaultArguments: List<String>, kotlinFacet: KotlinFacet) {
     val argumentArray = arguments.toTypedArray()
 
     with(kotlinFacet.configuration.settings) {
@@ -220,6 +221,9 @@ fun parseCompilerArgumentsToFacet(arguments: List<String>, kotlinFacet: KotlinFa
             else -> commonCompilerArguments
         }!!
 
+        val defaultCompilerArguments = compilerArguments.javaClass.newInstance()
+        parseArguments(defaultArguments.toTypedArray(), defaultCompilerArguments, true)
+
         val oldCoroutineSupport = CoroutineSupport.byCompilerArguments(commonCompilerArguments)
         commonCompilerArguments.coroutinesEnable = false
         commonCompilerArguments.coroutinesWarn = false
@@ -248,15 +252,17 @@ fun parseCompilerArgumentsToFacet(arguments: List<String>, kotlinFacet: KotlinFa
 
         val exposedFields = compilerArguments.exposedFields
 
+        fun exposeAsAdditionalArgument(field: Field) = field.name !in exposedFields && field.get(compilerArguments) != field.get(defaultCompilerArguments)
+
         val additionalArgumentsString = with(compilerArguments.javaClass.newInstance()) {
-            copyFieldsSatisfying(compilerArguments, this) { it.name !in exposedFields }
+            copyFieldsSatisfying(compilerArguments, this, ::exposeAsAdditionalArgument)
             ArgumentUtils.convertArgumentsToStringList(this).joinToString(separator = " ")
         }
         compilerInfo.compilerSettings!!.additionalArguments =
                 if (additionalArgumentsString.isNotEmpty()) additionalArgumentsString else CompilerSettings.DEFAULT_ADDITIONAL_ARGUMENTS
 
         with(compilerArguments.javaClass.newInstance()) {
-            copyFieldsSatisfying(this, compilerArguments) { it.name !in exposedFields }
+            copyFieldsSatisfying(this, compilerArguments, ::exposeAsAdditionalArgument)
         }
 
         copyInheritedFields(compilerArguments, commonCompilerArguments)

idea/tests/org/jetbrains/kotlin/idea/codeInsight/gradle/GradleFacetImportTest.kt

@@ -28,6 +28,7 @@ class GradleFacetImportTest : GradleImportingTestCase() {
     private val facetSettings: KotlinFacetSettings
         get() = KotlinFacet.get(getModule("project_main"))!!.configuration.settings
 
+    // TODO: Update this test to 1.1-RC when it's available
     @Test
     fun testJvmImport() {
         createProjectSubFile("build.gradle", """