Kotlin Facet: Detect module platform by 'kotlin'/'kotlin2js' plugin

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

@@ -49,6 +49,10 @@ class KotlinGradleModelBuilder : ModelBuilderService {
         val kotlinCompileTaskClasses = listOf("org.jetbrains.kotlin.gradle.tasks.KotlinCompile_Decorated",
                                               "org.jetbrains.kotlin.gradle.tasks.Kotlin2JsCompile_Decorated")
         val platformPluginIds = listOf("kotlin-platform-jvm", "kotlin-platform-js", "kotlin-platform-common")
+        val pluginToPlatform = linkedMapOf(
+                "kotlin" to "kotlin-platform-jvm",
+                "kotlin2js" to "kotlin-platform-js"
+        )
     }
 
     override fun getErrorMessageBuilder(project: Project, e: Exception): ErrorMessageBuilder {
@@ -126,12 +130,15 @@ class KotlinGradleModelBuilder : ModelBuilderService {
             collectCompilerArguments(compileTask, "getDefaultSerializedCompilerArguments", defaultCompilerArgumentsBySourceSet)
         }
 
+        val platform = platformPluginIds.singleOrNull { project.plugins.findPlugin(it) != null }
+                       ?: pluginToPlatform.entries.singleOrNull { project.plugins.findPlugin(it.key) != null }?.value
+
         return KotlinGradleModelImpl(
                 getImplements(project),
                 currentCompilerArgumentsBySourceSet,
                 defaultCompilerArgumentsBySourceSet,
                 getCoroutines(project),
-                platformPluginIds.singleOrNull { project.plugins.findPlugin(it) != null }
+                platform
         )
     }
 }