Add internal compiler argument to change metadata version

Will be used in tests to check how we behave on binaries produced by a
"future" compiler

js/js.translator/src/org/jetbrains/kotlin/js/facade/K2JSTranslator.java

@@ -19,6 +19,7 @@ package org.jetbrains.kotlin.js.facade;
 import com.intellij.openapi.vfs.VfsUtilCore;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
+import org.jetbrains.kotlin.config.CommonConfigurationKeys;
 import org.jetbrains.kotlin.config.CommonConfigurationKeysKt;
 import org.jetbrains.kotlin.config.LanguageVersionSettings;
 import org.jetbrains.kotlin.descriptors.DeclarationDescriptor;
@@ -42,12 +43,14 @@ import org.jetbrains.kotlin.js.translate.general.AstGenerationResult;
 import org.jetbrains.kotlin.js.translate.general.Translation;
 import org.jetbrains.kotlin.js.translate.utils.ExpandIsCallsKt;
 import org.jetbrains.kotlin.metadata.ProtoBuf;
+import org.jetbrains.kotlin.metadata.deserialization.BinaryVersion;
 import org.jetbrains.kotlin.progress.ProgressIndicatorAndCompilationCanceledStatus;
 import org.jetbrains.kotlin.psi.KtFile;
 import org.jetbrains.kotlin.resolve.BindingTrace;
 import org.jetbrains.kotlin.resolve.diagnostics.Diagnostics;
 import org.jetbrains.kotlin.serialization.js.KotlinJavascriptSerializationUtil;
 import org.jetbrains.kotlin.serialization.js.ast.JsAstSerializer;
+import org.jetbrains.kotlin.utils.JsMetadataVersion;
 
 import java.io.ByteArrayOutputStream;
 import java.io.File;
@@ -176,9 +179,12 @@ public final class K2JSTranslator {
 
                 List<DeclarationDescriptor> scope = translationResult.getFileMemberScopes().get(file);
                 assert scope != null : "Could not find descriptors for file: " + file;
+                BinaryVersion metadataVersion = config.getConfiguration().get(CommonConfigurationKeys.METADATA_VERSION);
                 ProtoBuf.PackageFragment packagePart = serializationUtil.serializeDescriptors(
                         bindingTrace.getBindingContext(), moduleDescriptor, scope, file.getPackageFqName(),
-                        CommonConfigurationKeysKt.getLanguageVersionSettings(config.getConfiguration()));
+                        CommonConfigurationKeysKt.getLanguageVersionSettings(config.getConfiguration()),
+                        metadataVersion != null ? metadataVersion : JsMetadataVersion.INSTANCE
+                );
 
                 File ioFile = VfsUtilCore.virtualToIoFile(file.getVirtualFile());
                 incrementalResults.processPackagePart(ioFile, packagePart.toByteArray(), binaryAst);

js/js.translator/src/org/jetbrains/kotlin/js/facade/TranslationResult.kt

@@ -19,6 +19,7 @@ package org.jetbrains.kotlin.js.facade
 import com.intellij.openapi.util.text.StringUtil
 import com.intellij.openapi.vfs.VfsUtilCore
 import org.jetbrains.kotlin.backend.common.output.*
+import org.jetbrains.kotlin.config.CommonConfigurationKeys
 import org.jetbrains.kotlin.config.languageVersionSettings
 import org.jetbrains.kotlin.descriptors.ModuleDescriptor
 import org.jetbrains.kotlin.js.backend.JsToStringGenerationVisitor
@@ -39,6 +40,7 @@ import org.jetbrains.kotlin.resolve.diagnostics.Diagnostics
 import org.jetbrains.kotlin.serialization.js.JsModuleDescriptor
 import org.jetbrains.kotlin.serialization.js.JsSerializerProtocol
 import org.jetbrains.kotlin.serialization.js.KotlinJavascriptSerializationUtil
+import org.jetbrains.kotlin.utils.JsMetadataVersion
 import org.jetbrains.kotlin.utils.KotlinJavascriptMetadataUtils
 import java.io.File
 import java.util.*
@@ -109,16 +111,18 @@ abstract class TranslationResult protected constructor(val diagnostics: Diagnost
                     kind = config.moduleKind,
                     imported = importedModules
                 )
-                val settings = config.configuration.languageVersionSettings
-                val serializedMetadata = KotlinJavascriptSerializationUtil.serializeMetadata(bindingContext, moduleDescription, settings)
+                val serializedMetadata = KotlinJavascriptSerializationUtil.serializeMetadata(
+                    bindingContext, moduleDescription,
+                    config.configuration.languageVersionSettings,
+                    config.configuration.get(CommonConfigurationKeys.METADATA_VERSION) as? JsMetadataVersion ?: JsMetadataVersion.INSTANCE
+                )
                 val metaFileContent = serializedMetadata.asString()
                 val sourceFilesForMetaFile = ArrayList(sourceFiles)
                 val jsMetaFile = SimpleOutputFile(sourceFilesForMetaFile, metaFileName, metaFileContent)
                 outputFiles.add(jsMetaFile)
 
                 for (serializedPackage in serializedMetadata.serializedPackages()) {
-                    val outputBinaryFile = kjsmFileForPackage(serializedPackage.fqName, serializedPackage.bytes)
-                    outputFiles.add(outputBinaryFile)
+                    outputFiles.add(kjsmFileForPackage(serializedPackage.fqName, serializedPackage.bytes))
                 }
             }