Import new Gradle coroutines DSL setting into Kotlin facet

idea/idea-jps-common/src/org/jetbrains/kotlin/config/KotlinFacetSettings.kt

@@ -82,7 +82,7 @@ enum class CoroutineSupport(
         }
 
         fun byCompilerArgument(argument: String): CoroutineSupport {
-            return CoroutineSupport.values().find { it.compilerArgument == argument } ?: DEFAULT
+            return CoroutineSupport.values().find { it.compilerArgument.equals(argument, ignoreCase = true) } ?: DEFAULT
         }
     }
 }

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

@@ -26,11 +26,13 @@ import java.lang.Exception
 interface KotlinGradleModel : Serializable {
     val implements: String?
     val serializedCompilerArguments: List<String>?
+    val coroutines: String?
 }
 
 class KotlinGradleModelImpl(
         override val implements: String?,
-        override val serializedCompilerArguments: List<String>?
+        override val serializedCompilerArguments: List<String>?,
+        override val coroutines: String?
 ) : KotlinGradleModel
 
 class KotlinGradleModelBuilder : ModelBuilderService {
@@ -65,6 +67,23 @@ class KotlinGradleModelBuilder : ModelBuilderService {
         }
     }
 
+    private fun getCoroutines(project: Project): String? {
+        val kotlinExtension = project.extensions.findByName("kotlin") ?: return null
+        val experimentalExtension = try {
+            kotlinExtension.javaClass.getMethod("getExperimental").invoke(kotlinExtension)
+        }
+        catch(e: NoSuchMethodException) {
+            return null
+        }
+
+        return try {
+            experimentalExtension.javaClass.getMethod("getCoroutines").invoke(experimentalExtension)?.toString()
+        }
+        catch(e: NoSuchMethodException) {
+            null
+        }
+    }
+
     override fun buildAll(modelName: String?, project: Project) =
-            KotlinGradleModelImpl(getImplements(project), getCompilerArguments(project))
+            KotlinGradleModelImpl(getImplements(project), getCompilerArguments(project), getCoroutines(project))
 }

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

@@ -34,6 +34,7 @@ import org.jetbrains.plugins.gradle.service.project.AbstractProjectResolverExten
 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>.coroutines by UserDataProperty(Key.create<String>("KOTLIN_COROUTINES"))
 
 class KotlinGradleProjectResolverExtension : AbstractProjectResolverExtension() {
     override fun getToolingExtensionsClasses(): Set<Class<out Any>> {
@@ -60,6 +61,7 @@ class KotlinGradleProjectResolverExtension : AbstractProjectResolverExtension()
         }
 
         ideModule.serializedCompilerArguments = gradleModel.serializedCompilerArguments
+        ideModule.coroutines = gradleModel.coroutines
 
         super.populateModuleDependencies(gradleModule, ideModule, ideProject)
     }

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

@@ -115,7 +115,8 @@ private fun configureFacetByGradleModule(
                           ?: return null
     val platformKind = detectPlatformByPlugin(moduleNode) ?: detectPlatformByLibrary(moduleNode)
 
-    val coroutinesProperty = findKotlinCoroutinesProperty(ideModule.project)
+    val coroutinesProperty = CoroutineSupport.byCompilerArgument(
+            moduleNode.coroutines ?: findKotlinCoroutinesProperty(ideModule.project))
 
     val kotlinFacet = ideModule.getOrCreateFacet(modelsProvider, false)
     kotlinFacet.configureFacet(compilerVersion, coroutinesProperty, platformKind, modelsProvider)
@@ -127,14 +128,13 @@ private fun configureFacetByGradleModule(
 
 private val gradlePropertyFiles = listOf("local.properties", "gradle.properties")
 
-private fun findKotlinCoroutinesProperty(project: Project): CoroutineSupport {
+private fun findKotlinCoroutinesProperty(project: Project): String {
     for (propertyFileName in gradlePropertyFiles) {
         val propertyFile = project.baseDir.findChild(propertyFileName) ?: continue
         val properties = Properties()
         properties.load(propertyFile.inputStream)
-        val coroutinesProperty = properties.getProperty("kotlin.coroutines") ?: continue
+        properties.getProperty("kotlin.coroutines")?.let { return it }
-        return CoroutineSupport.byCompilerArgument(coroutinesProperty)
     }
 
-    return CoroutineSupport.DEFAULT
+    return CoroutineSupport.DEFAULT.compilerArgument
 }