KT-11410: Add Xmultifile-parts-inherit CLI option.

compiler/backend/src/org/jetbrains/kotlin/codegen/state/GenerationState.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2016 JetBrains s.r.o.
+ * Copyright 2010-2015 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -57,6 +57,7 @@ class GenerationState @JvmOverloads constructor(
         disableInline: Boolean = false,
         disableOptimization: Boolean = false,
         val useTypeTableInSerializer: Boolean = false,
+        val inheritMultifileParts: Boolean = false,
         val packagesWithObsoleteParts: Collection<FqName> = emptySet(),
         val obsoleteMultifileClasses: Collection<FqName> = emptySet(),
         // for PackageCodegen in incremental compilation mode

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/K2JVMCompilerArguments.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2016 JetBrains s.r.o.
+ * Copyright 2010-2015 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -64,6 +64,9 @@ public class K2JVMCompilerArguments extends CommonCompilerArguments {
     @Argument(value = "Xreport-perf", description = "Report detailed performance statistics")
     public boolean reportPerf;
 
+    @Argument(value = "Xmultifile-parts-inherit", description = "Compile multifile classes as a hierarchy of parts and facade")
+    public boolean inheritMultifileParts;
+
     @Argument(value = "Xallow-kotlin-package", description = "Allow compiling code in package 'kotlin'")
     public boolean allowKotlinPackage;
 

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/K2JVMCompiler.kt

@@ -280,6 +280,7 @@ open class K2JVMCompiler : CLICompiler<K2JVMCompilerArguments>() {
             configuration.put(JVMConfigurationKeys.DISABLE_INLINE, arguments.noInline)
             configuration.put(JVMConfigurationKeys.DISABLE_OPTIMIZATION, arguments.noOptimize)
             configuration.put(JVMConfigurationKeys.DECLARATIONS_JSON_PATH, arguments.declarationsOutputPath)
+            configuration.put(JVMConfigurationKeys.INHERIT_MULTIFILE_PARTS, arguments.inheritMultifileParts);
             configuration.put(CLIConfigurationKeys.ALLOW_KOTLIN_PACKAGE, arguments.allowKotlinPackage);
             configuration.put(CLIConfigurationKeys.REPORT_PERF, arguments.reportPerf);
         }

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/KotlinCoreEnvironment.kt

@@ -109,10 +109,7 @@ class KotlinCoreEnvironment private constructor(
     private val sourceFiles = ArrayList<KtFile>()
     private val javaRoots = ArrayList<JavaRoot>()
 
-    val configuration: CompilerConfiguration = configuration.copy().let {
+    val configuration: CompilerConfiguration = configuration.copy().apply { setReadOnly(true) }
-        it.setReadOnly(true)
-        it
-    }
 
     init {
         PersistentFSConstants.setMaxIntellisenseFileSize(FileUtilRt.LARGE_FOR_CONTENT_LOADING)

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/KotlinToJVMBytecodeCompiler.kt

@@ -399,6 +399,7 @@ object KotlinToJVMBytecodeCompiler {
                 configuration.get(JVMConfigurationKeys.DISABLE_INLINE, false),
                 configuration.get(JVMConfigurationKeys.DISABLE_OPTIMIZATION, false),
                 /* useTypeTableInSerializer = */ false,
+                configuration.get(JVMConfigurationKeys.INHERIT_MULTIFILE_PARTS, false),
                 packagesWithObsoleteParts,
                 obsoleteMultifileClasses,
                 targetId,

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/config/JVMConfigurationKeys.java

@@ -35,6 +35,8 @@ public class JVMConfigurationKeys {
             CompilerConfigurationKey.create("disable inline");
     public static final CompilerConfigurationKey<Boolean> DISABLE_OPTIMIZATION =
             CompilerConfigurationKey.create("disable optimization");
+    public static final CompilerConfigurationKey<Boolean> INHERIT_MULTIFILE_PARTS =
+            CompilerConfigurationKey.create("compile multifile classes to a hierarchy of parts and facade");
 
     public static final CompilerConfigurationKey<IncrementalCompilationComponents> INCREMENTAL_COMPILATION_COMPONENTS =
             CompilerConfigurationKey.create("incremental cache provider");

compiler/testData/cli/jvm/extraHelp.out

@@ -4,6 +4,7 @@ where advanced options include:
   -Xno-param-assertions      Don't generate not-null assertions on parameters of methods accessible from Java
   -Xno-optimize              Disable optimizations
   -Xreport-perf              Report detailed performance statistics
+  -Xmultifile-parts-inherit  Compile multifile classes as a hierarchy of parts and facade
   -Xallow-kotlin-package     Allow compiling code in package 'kotlin'
   -Xskip-metadata-version-check Try loading binary incompatible classes, may cause crashes
   -Xdump-declarations-to <path> Path to JSON file to dump Java to Kotlin declaration mappings