[K/N] DI some properties of ObjCExport

Move `exportedInterface` and `codeSpec` to constructor's
parameters, so in the future "dynamic" compiler pipeline
they can be created independently.

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/ToplevelPhases.kt

@@ -17,6 +17,8 @@ import org.jetbrains.kotlin.backend.konan.lower.CacheInfoBuilder
 import org.jetbrains.kotlin.backend.konan.lower.ExpectToActualDefaultValueCopier
 import org.jetbrains.kotlin.backend.konan.lower.SamSuperTypesChecker
 import org.jetbrains.kotlin.backend.konan.objcexport.ObjCExport
+import org.jetbrains.kotlin.backend.konan.objcexport.createCodeSpec
+import org.jetbrains.kotlin.backend.konan.objcexport.produceObjCExportInterface
 import org.jetbrains.kotlin.backend.konan.serialization.*
 import org.jetbrains.kotlin.config.CommonConfigurationKeys
 import org.jetbrains.kotlin.config.languageVersionSettings
@@ -86,7 +88,13 @@ internal val createSymbolTablePhase = konanUnitPhase(
 
 internal val objCExportPhase = konanUnitPhase(
         op = {
-            objCExport = ObjCExport(this, symbolTable!!)
+            val objcInterface = when {
+                !config.target.family.isAppleFamily -> null
+                config.produce != CompilerOutputKind.FRAMEWORK -> null
+                else -> produceObjCExportInterface(this)
+            }
+            val codeSpec = objcInterface?.createCodeSpec(symbolTable!!)
+            objCExport = ObjCExport(this, objcInterface, codeSpec)
         },
         name = "ObjCExport",
         description = "Objective-C header generation",

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/objcexport/ObjCExport.kt

@@ -6,11 +6,9 @@
 package org.jetbrains.kotlin.backend.konan.objcexport
 
 import org.jetbrains.kotlin.backend.konan.*
-import org.jetbrains.kotlin.backend.konan.Context
 import org.jetbrains.kotlin.backend.konan.KonanConfigKeys.Companion.BUNDLE_ID
 import org.jetbrains.kotlin.backend.konan.descriptors.getPackageFragments
 import org.jetbrains.kotlin.backend.konan.descriptors.isInterface
-import org.jetbrains.kotlin.backend.konan.getExportedDependencies
 import org.jetbrains.kotlin.backend.konan.llvm.CodeGenerator
 import org.jetbrains.kotlin.backend.konan.llvm.objcexport.ObjCExportBlockCodeGenerator
 import org.jetbrains.kotlin.backend.konan.llvm.objcexport.ObjCExportCodeGenerator
@@ -19,7 +17,6 @@ import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.descriptors.ModuleDescriptor
 import org.jetbrains.kotlin.descriptors.SourceFile
-import org.jetbrains.kotlin.ir.util.SymbolTable
 import org.jetbrains.kotlin.konan.exec.Command
 import org.jetbrains.kotlin.konan.file.File
 import org.jetbrains.kotlin.konan.file.createTempFile
@@ -37,43 +34,42 @@ internal class ObjCExportedInterface(
         val mapper: ObjCExportMapper
 )
 
-internal class ObjCExport(val context: Context, symbolTable: SymbolTable) {
+// TODO: Replace Context with a more lightweight class.
+internal fun produceObjCExportInterface(context: Context): ObjCExportedInterface {
+    require(context.config.target.family.isAppleFamily)
+    require(context.config.produce == CompilerOutputKind.FRAMEWORK)
+
+    val topLevelNamePrefix = context.objCExportTopLevelNamePrefix
+
+    // TODO: emit RTTI to the same modules as classes belong to.
+    //   Not possible yet, since ObjCExport translates the entire "world" API at once
+    //   and can't do this per-module, e.g. due to global name conflict resolution.
+
+    val unitSuspendFunctionExport = context.config.unitSuspendFunctionObjCExport
+    val mapper = ObjCExportMapper(context.frontendServices.deprecationResolver, unitSuspendFunctionExport = unitSuspendFunctionExport)
+    val moduleDescriptors = listOf(context.moduleDescriptor) + context.getExportedDependencies()
+    val objcGenerics = context.configuration.getBoolean(KonanConfigKeys.OBJC_GENERICS)
+    val namer = ObjCExportNamerImpl(
+            moduleDescriptors.toSet(),
+            context.moduleDescriptor.builtIns,
+            mapper,
+            topLevelNamePrefix,
+            local = false,
+            objcGenerics = objcGenerics
+    )
+    val headerGenerator = ObjCExportHeaderGeneratorImpl(context, moduleDescriptors, mapper, namer, objcGenerics)
+    headerGenerator.translateModule()
+    return headerGenerator.buildInterface()
+}
+
+internal class ObjCExport(
+        val context: Context,
+        private val exportedInterface: ObjCExportedInterface?,
+        private val codeSpec: ObjCExportCodeSpec?
+) {
     private val target get() = context.config.target
     private val topLevelNamePrefix get() = context.objCExportTopLevelNamePrefix
 
-    private val exportedInterface = produceInterface()
-    private val codeSpec = exportedInterface?.createCodeSpec(symbolTable)
-
-    private fun produceInterface(): ObjCExportedInterface? {
-        if (!target.family.isAppleFamily) return null
-
-        // TODO: emit RTTI to the same modules as classes belong to.
-        //   Not possible yet, since ObjCExport translates the entire "world" API at once
-        //   and can't do this per-module, e.g. due to global name conflict resolution.
-
-        val produceFramework = context.config.produce == CompilerOutputKind.FRAMEWORK
-
-        return if (produceFramework) {
-            val unitSuspendFunctionExport = context.config.unitSuspendFunctionObjCExport
-            val mapper = ObjCExportMapper(context.frontendServices.deprecationResolver, unitSuspendFunctionExport = unitSuspendFunctionExport)
-            val moduleDescriptors = listOf(context.moduleDescriptor) + context.getExportedDependencies()
-            val objcGenerics = context.configuration.getBoolean(KonanConfigKeys.OBJC_GENERICS)
-            val namer = ObjCExportNamerImpl(
-                    moduleDescriptors.toSet(),
-                    context.moduleDescriptor.builtIns,
-                    mapper,
-                    topLevelNamePrefix,
-                    local = false,
-                    objcGenerics = objcGenerics
-            )
-            val headerGenerator = ObjCExportHeaderGeneratorImpl(context, moduleDescriptors, mapper, namer, objcGenerics)
-            headerGenerator.translateModule()
-            headerGenerator.buildInterface()
-        } else {
-            null
-        }
-    }
-
     lateinit var namer: ObjCExportNamer
 
     internal fun generate(codegen: CodeGenerator) {