JS: add tests for recompilation of only some files in a project

js/js.frontend/src/org/jetbrains/kotlin/frontend/js/di/injection.kt

@@ -22,6 +22,8 @@ import org.jetbrains.kotlin.container.get
 import org.jetbrains.kotlin.container.useImpl
 import org.jetbrains.kotlin.container.useInstance
 import org.jetbrains.kotlin.context.ModuleContext
+import org.jetbrains.kotlin.descriptors.PackageFragmentProvider
+import org.jetbrains.kotlin.descriptors.impl.CompositePackageFragmentProvider
 import org.jetbrains.kotlin.descriptors.impl.ModuleDescriptorImpl
 import org.jetbrains.kotlin.frontend.di.configureModule
 import org.jetbrains.kotlin.incremental.components.LookupTracker
@@ -30,12 +32,15 @@ import org.jetbrains.kotlin.resolve.*
 import org.jetbrains.kotlin.resolve.lazy.KotlinCodeAnalyzer
 import org.jetbrains.kotlin.resolve.lazy.ResolveSession
 import org.jetbrains.kotlin.resolve.lazy.declarations.DeclarationProviderFactory
+import org.jetbrains.kotlin.serialization.deserialization.DeserializationConfiguration
+import org.jetbrains.kotlin.serialization.js.KotlinJavascriptSerializationUtil
 
 fun createTopDownAnalyzerForJs(
         moduleContext: ModuleContext,
         bindingTrace: BindingTrace,
         declarationProviderFactory: DeclarationProviderFactory,
-        languageVersionSettings: LanguageVersionSettings
+        languageVersionSettings: LanguageVersionSettings,
+        fallbackMetadata: List<ByteArray> = emptyList()
 ): LazyTopDownAnalyzer {
     val storageComponentContainer = createContainer("TopDownAnalyzerForJs", JsPlatform) {
         configureModule(moduleContext, JsPlatform, TargetPlatformVersion.NoVersion, bindingTrace)
@@ -50,7 +55,13 @@ fun createTopDownAnalyzerForJs(
         useImpl<ResolveSession>()
         useImpl<LazyTopDownAnalyzer>()
     }.apply {
-        get<ModuleDescriptorImpl>().initialize(get<KotlinCodeAnalyzer>().packageFragmentProvider)
+        val packagePartProviders = mutableListOf<PackageFragmentProvider>(get<KotlinCodeAnalyzer>().packageFragmentProvider)
+        val moduleDescriptor = get<ModuleDescriptorImpl>()
+        if (fallbackMetadata.isNotEmpty()) {
+            packagePartProviders += KotlinJavascriptSerializationUtil.readScope(
+                    fallbackMetadata, moduleContext.storageManager, moduleDescriptor, DeserializationConfiguration.Default)
+        }
+        moduleDescriptor.initialize(CompositePackageFragmentProvider(packagePartProviders))
     }
     return storageComponentContainer.get<LazyTopDownAnalyzer>()
 }

js/js.frontend/src/org/jetbrains/kotlin/js/analyze/TopDownAnalyzerFacadeForJS.kt

@@ -22,6 +22,7 @@ import org.jetbrains.kotlin.context.ModuleContext
 import org.jetbrains.kotlin.context.ProjectContext
 import org.jetbrains.kotlin.frontend.js.di.createTopDownAnalyzerForJs
 import org.jetbrains.kotlin.js.analyzer.JsAnalysisResult
+import org.jetbrains.kotlin.js.config.JSConfigurationKeys
 import org.jetbrains.kotlin.js.config.JsConfig
 import org.jetbrains.kotlin.js.resolve.JsPlatform
 import org.jetbrains.kotlin.js.resolve.MODULE_KIND
@@ -56,7 +57,8 @@ object TopDownAnalyzerFacadeForJS {
         val analyzerForJs = createTopDownAnalyzerForJs(
                 moduleContext, trace,
                 FileBasedDeclarationProviderFactory(moduleContext.storageManager, files),
-                config.configuration.languageVersionSettings
+                config.configuration.languageVersionSettings,
+                config.configuration[JSConfigurationKeys.FALLBACK_METADATA].orEmpty()
         )
         analyzerForJs.analyzeDeclarations(TopDownAnalysisMode.TopLevelDeclarations, files)
         return JsAnalysisResult.success(trace, moduleContext.module)

js/js.frontend/src/org/jetbrains/kotlin/js/config/JSConfigurationKeys.java

@@ -39,4 +39,9 @@ public class JSConfigurationKeys {
 
     public static final CompilerConfigurationKey<Boolean> TYPED_ARRAYS_ENABLED =
             CompilerConfigurationKey.create("TypedArrays enabled");
+
+    public static final CompilerConfigurationKey<List<byte[]>> FALLBACK_METADATA =
+            CompilerConfigurationKey.create("fallback metadata");
+
+    public static final CompilerConfigurationKey<Boolean> SERIALIZE_FRAGMENTS = CompilerConfigurationKey.create("serialize fragments");
 }