Android Extensions: Downgrade to old Android variant processing logic when 'experimental' flag is disabled (KT-19270)

plugins/android-extensions/android-extensions-idea/src/org/jetbrains/kotlin/android/synthetic/idea/ExperimentalUtils.kt

@@ -55,8 +55,13 @@ internal val Module.androidExtensionsIsEnabled: Boolean
 internal val ModuleInfo.androidExtensionsIsExperimental: Boolean
     get() {
         val module = (this as? ModuleSourceInfo)?.module ?: return false
-        if (isTestMode(module)) return true
-        return module.getOptionValueInFacet(EXPERIMENTAL_OPTION) == "true"
+        return module.androidExtensionsIsExperimental
+    }
+
+internal val Module.androidExtensionsIsExperimental: Boolean
+    get() {
+        if (isTestMode(this)) return true
+        return getOptionValueInFacet(EXPERIMENTAL_OPTION) == "true"
     }
 
 val ModuleInfo.androidExtensionsGlobalCacheImpl: CacheImplementation

plugins/android-extensions/android-extensions-idea/src/org/jetbrains/kotlin/android/synthetic/idea/res/IDEAndroidLayoutXmlFileManager.kt

@@ -28,6 +28,7 @@ import org.jetbrains.android.facet.AndroidFacet
 import org.jetbrains.kotlin.android.synthetic.AndroidConst.SYNTHETIC_PACKAGE_PATH_LENGTH
 import org.jetbrains.kotlin.android.synthetic.idea.AndroidPsiTreeChangePreprocessor
 import org.jetbrains.kotlin.android.synthetic.idea.AndroidXmlVisitor
+import org.jetbrains.kotlin.android.synthetic.idea.androidExtensionsIsExperimental
 import org.jetbrains.kotlin.android.synthetic.res.*
 import org.jetbrains.kotlin.descriptors.ModuleDescriptor
 import org.jetbrains.kotlin.descriptors.PropertyDescriptor
@@ -110,6 +111,33 @@ class IDEAndroidLayoutXmlFileManager(val module: Module) : AndroidLayoutXmlFileM
     private fun SourceProvider.toVariant() = AndroidVariant(name, resDirectories.map { it.canonicalPath })
 
     private fun getAndroidModuleInfo(androidFacet: AndroidFacet): AndroidModule? {
+        if (androidFacet.module.androidExtensionsIsExperimental) {
+            return getAndroidModuleInfoExperimental(androidFacet)
+        }
+
+        val applicationPackage = androidFacet.manifest?.`package`?.toString()
+
+        if (applicationPackage != null) {
+            val mainVariant = androidFacet.mainSourceProvider.toVariant()
+
+            val method = try { androidFacet::class.java.getMethod("getFlavorSourceProviders") } catch (e: NoSuchMethodException) { null }
+            val variants: List<AndroidVariant>? = if (method != null) {
+                val sourceProviders = method.invoke(androidFacet) as List<SourceProvider>?
+                sourceProviders?.map { it.toVariant() } ?: listOf()
+            }
+            else {
+                val model = AndroidGradleModel.get(androidFacet.module)
+                model?.flavorSourceProviders?.map { it.toVariant() } ?: listOf(androidFacet.mainSourceProvider.toVariant())
+            }
+
+            if (variants != null) {
+                return AndroidModule(applicationPackage, listOf(mainVariant) + variants)
+            }
+        }
+        return null
+    }
+
+    private fun getAndroidModuleInfoExperimental(androidFacet: AndroidFacet): AndroidModule? {
         val applicationPackage = androidFacet.manifest?.`package`?.toString() ?: return null
 
         val allResDirectories = androidFacet.getAppResources(true)?.resourceDirs.orEmpty().mapNotNull { it.canonicalPath }