Refactor compiler arguments to configuration conversion:

extract into independent functions, rearrange logic
2019-01-08 18:00:45 +01:00
parent 298aaf999e
commit 04b04ea0ee
11 changed files with 431 additions and 333 deletions
@@ -331,7 +331,7 @@ abstract class CommonCompilerArguments : CommonToolArguments() {
        }
    }

-    fun configureLanguageVersionSettings(collector: MessageCollector): LanguageVersionSettings {
+    fun toLanguageVersionSettings(collector: MessageCollector): LanguageVersionSettings {

        // If only "-api-version" is specified, language version is assumed to be the latest stable
        val languageVersion = parseVersion(collector, languageVersion, "language") ?: LanguageVersion.LATEST_STABLE
@@ -40,25 +40,25 @@ fun <From : Any, To : From> mergeBeans(from: From, to: To): To {

@Suppress("UNCHECKED_CAST")
 fun <From : Any, To : Any> copyInheritedFields(from: From, to: To) =
-        copyProperties(from, to, true, collectProperties(from::class as KClass<From>, true))
+    copyProperties(from, to, true, collectProperties(from::class as KClass<From>, true))

@Suppress("UNCHECKED_CAST")
 fun <From : Any, To : Any> copyFieldsSatisfying(from: From, to: To, predicate: (KProperty1<From, Any?>) -> Boolean) =
-        copyProperties(from, to, true, collectProperties(from::class as KClass<From>, false).filter(predicate))
+    copyProperties(from, to, true, collectProperties(from::class as KClass<From>, false).filter(predicate))

 private fun <From : Any, To : Any> copyProperties(
-        from: From,
-        to: To,
-        deepCopyWhenNeeded: Boolean,
-        propertiesToCopy: List<KProperty1<From, Any?>>,
-        filter: ((KProperty1<From, Any?>, Any?) -> Boolean)? = null
+    from: From,
+    to: To,
+    deepCopyWhenNeeded: Boolean,
+    propertiesToCopy: List<KProperty1<From, Any?>>,
+    filter: ((KProperty1<From, Any?>, Any?) -> Boolean)? = null
 ): To {
    if (from == to) return to

    for (fromProperty in propertiesToCopy) {
        @Suppress("UNCHECKED_CAST")
        val toProperty = to::class.memberProperties.firstOrNull { it.name == fromProperty.name } as? KMutableProperty1<To, Any?>
-                         ?: continue
+            ?: continue
        val fromValue = fromProperty.get(from)
        if (filter != null && !filter(fromProperty, fromValue)) continue
        toProperty.set(to, if (deepCopyWhenNeeded) fromValue?.copyValueIfNeeded() else fromValue)
@@ -69,14 +69,14 @@ private fun <From : Any, To : Any> copyProperties(
 private fun Any.copyValueIfNeeded(): Any {
    @Suppress("UNCHECKED_CAST")
    return when (this) {
-        is ByteArray -> Arrays.copyOf(this, size)
-        is CharArray -> Arrays.copyOf(this, size)
-        is ShortArray -> Arrays.copyOf(this, size)
-        is IntArray -> Arrays.copyOf(this, size)
-        is LongArray -> Arrays.copyOf(this, size)
-        is FloatArray -> Arrays.copyOf(this, size)
-        is DoubleArray -> Arrays.copyOf(this, size)
-        is BooleanArray -> Arrays.copyOf(this, size)
+        is ByteArray -> this.copyOf(size)
+        is CharArray -> this.copyOf(size)
+        is ShortArray -> this.copyOf(size)
+        is IntArray -> this.copyOf(size)
+        is LongArray -> this.copyOf(size)
+        is FloatArray -> this.copyOf(size)
+        is DoubleArray -> this.copyOf(size)
+        is BooleanArray -> this.copyOf(size)

        is Array<*> -> java.lang.reflect.Array.newInstance(this::class.java.componentType, size).apply {
            this as Array<Any?>
@@ -100,8 +100,8 @@ fun <T : Any> collectProperties(kClass: KClass<T>, inheritedOnly: Boolean): List
    if (inheritedOnly) {
        properties.removeAll(kClass.declaredMemberProperties)
    }
-    return properties.filter {
-        it.visibility == KVisibility.PUBLIC && (it.annotations.firstOrNull { it is Transient } as Transient?) == null
+    return properties.filter { property ->
+        property.visibility == KVisibility.PUBLIC && (property.annotations.firstOrNull { it is Transient } as Transient?) == null
    }
 }

@@ -109,4 +109,5 @@ fun CommonCompilerArguments.setApiVersionToLanguageVersionIfNeeded() {
    if (languageVersion != null && VersionComparatorUtil.compare(languageVersion, apiVersion) < 0) {
        apiVersion = languageVersion
    }
-}
+}
+
@@ -18,15 +18,17 @@ package org.jetbrains.kotlin.cli.common

 import com.intellij.openapi.Disposable
 import com.intellij.openapi.util.Disposer
-import kotlin.collections.*
 import org.jetbrains.kotlin.analyzer.AnalysisResult
+import org.jetbrains.kotlin.cli.common.CLIConfigurationKeys.MESSAGE_COLLECTOR_KEY
+import org.jetbrains.kotlin.cli.common.ExitCode.COMPILATION_ERROR
+import org.jetbrains.kotlin.cli.common.ExitCode.INTERNAL_ERROR
 import org.jetbrains.kotlin.cli.common.arguments.CommonCompilerArguments
+import org.jetbrains.kotlin.cli.common.environment.setIdeaIoUseFallback
+import org.jetbrains.kotlin.cli.common.messages.CompilerMessageSeverity.INFO
 import org.jetbrains.kotlin.cli.common.messages.GroupingMessageCollector
 import org.jetbrains.kotlin.cli.common.messages.MessageCollector
 import org.jetbrains.kotlin.cli.common.messages.MessageCollectorUtil
 import org.jetbrains.kotlin.cli.common.messages.MessageRenderer
-import org.jetbrains.kotlin.config.CommonConfigurationKeys
-import org.jetbrains.kotlin.config.*
 import org.jetbrains.kotlin.config.CompilerConfiguration
 import org.jetbrains.kotlin.config.Services
 import org.jetbrains.kotlin.metadata.deserialization.BinaryVersion
@@ -34,18 +36,9 @@ import org.jetbrains.kotlin.progress.CompilationCanceledException
 import org.jetbrains.kotlin.progress.CompilationCanceledStatus
 import org.jetbrains.kotlin.progress.ProgressIndicatorAndCompilationCanceledStatus
 import org.jetbrains.kotlin.utils.KotlinPaths
-import org.jetbrains.kotlin.utils.KotlinPathsFromHomeDir
-import org.jetbrains.kotlin.utils.PathUtil
-
 import java.io.File
 import java.io.PrintStream

-import org.jetbrains.kotlin.cli.common.CLIConfigurationKeys.MESSAGE_COLLECTOR_KEY
-import org.jetbrains.kotlin.cli.common.ExitCode.COMPILATION_ERROR
-import org.jetbrains.kotlin.cli.common.ExitCode.INTERNAL_ERROR
-import org.jetbrains.kotlin.cli.common.environment.setIdeaIoUseFallback
-import org.jetbrains.kotlin.cli.common.messages.CompilerMessageSeverity.*
-
 abstract class CLICompiler<A : CommonCompilerArguments> : CLITool<A>() {

    protected abstract val performanceManager: CommonCompilerPerformanceManager
@@ -60,22 +53,24 @@ abstract class CLICompiler<A : CommonCompilerArguments> : CLITool<A>() {
        return exec(errStream, Services.EMPTY, MessageRenderer.PLAIN_FULL_PATHS, args)
    }

-    public override fun execImpl(messageCollector: MessageCollector, services: Services, arguments: A): ExitCode {
+    public override fun execImpl(baseMessageCollector: MessageCollector, services: Services, arguments: A): ExitCode {
        val performanceManager = performanceManager
        if (arguments.reportPerf || arguments.dumpPerf != null) {
            performanceManager.enableCollectingPerformanceStatistics()
        }

-        val groupingCollector = GroupingMessageCollector(messageCollector, arguments.allWarningsAsErrors)
-
        val configuration = CompilerConfiguration()
-        configuration.put(MESSAGE_COLLECTOR_KEY, groupingCollector)
+
+        val messageCollector = GroupingMessageCollector(baseMessageCollector, arguments.allWarningsAsErrors).also {
+            configuration.put(CLIConfigurationKeys.MESSAGE_COLLECTOR_KEY, it)
+        }
+
        configuration.put(CLIConfigurationKeys.PERF_MANAGER, performanceManager)
        try {
            setupCommonArguments(configuration, arguments)
            setupPlatformSpecificArgumentsAndServices(configuration, arguments, services)
-            val paths = computeKotlinPaths(groupingCollector, arguments)
-            if (groupingCollector.hasErrors()) {
+            val paths = computeKotlinPaths(messageCollector, arguments)
+            if (messageCollector.hasErrors()) {
                return ExitCode.COMPILATION_ERROR
            }

@@ -85,6 +80,7 @@ abstract class CLICompiler<A : CommonCompilerArguments> : CLITool<A>() {
            val rootDisposable = Disposer.newDisposable()
            try {
                setIdeaIoUseFallback()
+
                val code = doExecute(arguments, configuration, rootDisposable, paths)

                performanceManager.notifyCompilationFinished()
@@ -97,7 +93,7 @@ abstract class CLICompiler<A : CommonCompilerArguments> : CLITool<A>() {
                    performanceManager.dumpPerformanceReport(File(arguments.dumpPerf!!))
                }

-                return if (groupingCollector.hasErrors()) COMPILATION_ERROR else code
+                return if (messageCollector.hasErrors()) COMPILATION_ERROR else code
            } catch (e: CompilationCanceledException) {
                messageCollector.report(INFO, "Compilation was canceled", null)
                return ExitCode.OK
@@ -115,61 +111,19 @@ abstract class CLICompiler<A : CommonCompilerArguments> : CLITool<A>() {
        } catch (e: AnalysisResult.CompilationErrorException) {
            return COMPILATION_ERROR
        } catch (t: Throwable) {
-            MessageCollectorUtil.reportException(groupingCollector, t)
+            MessageCollectorUtil.reportException(messageCollector, t)
            return INTERNAL_ERROR
        } finally {
-            groupingCollector.flush()
+            messageCollector.flush()
        }
    }

    private fun setupCommonArguments(configuration: CompilerConfiguration, arguments: A) {
-        if (arguments.noInline) {
-            configuration.put(CommonConfigurationKeys.DISABLE_INLINE, true)
-        }
-        if (arguments.intellijPluginRoot != null) {
-            configuration.put(CLIConfigurationKeys.INTELLIJ_PLUGIN_ROOT, arguments.intellijPluginRoot!!)
-        }
-        if (arguments.reportOutputFiles) {
-            configuration.put(CommonConfigurationKeys.REPORT_OUTPUT_FILES, true)
-        }
-
-        val metadataVersionString = arguments.metadataVersion
-        if (metadataVersionString != null) {
-            val versionArray = BinaryVersion.parseVersionArray(metadataVersionString)
-            if (versionArray == null) {
-                configuration.getNotNull(MESSAGE_COLLECTOR_KEY).report(ERROR, "Invalid metadata version: $metadataVersionString", null)
-            } else {
-                configuration.put(CommonConfigurationKeys.METADATA_VERSION, createMetadataVersion(versionArray))
-            }
-        }
-
-        setupLanguageVersionSettings(configuration, arguments)
-
-        configuration.put(CommonConfigurationKeys.LIST_PHASES, arguments.listPhases)
-        if (arguments.disablePhases != null) {
-            configuration.put(CommonConfigurationKeys.DISABLED_PHASES, setOf(*arguments.disablePhases!!))
-        }
-        if (arguments.verbosePhases != null) {
-            configuration.put(CommonConfigurationKeys.VERBOSE_PHASES, setOf(*arguments.verbosePhases!!))
-        }
-        if (arguments.phasesToDumpBefore != null) {
-            configuration.put(CommonConfigurationKeys.PHASES_TO_DUMP_STATE_BEFORE, setOf(*arguments.phasesToDumpBefore!!))
-        }
-        if (arguments.phasesToDumpAfter != null) {
-            configuration.put(CommonConfigurationKeys.PHASES_TO_DUMP_STATE_AFTER, setOf(*arguments.phasesToDumpAfter!!))
-        }
-        if (arguments.phasesToDump != null) {
-            configuration.put(CommonConfigurationKeys.PHASES_TO_DUMP_STATE, setOf(*arguments.phasesToDump!!))
-        }
-        configuration.put(CommonConfigurationKeys.PROFILE_PHASES, arguments.profilePhases)
+        configuration.setupCommonArguments(arguments, this::createMetadataVersion)
    }

    protected abstract fun createMetadataVersion(versionArray: IntArray): BinaryVersion

-    private fun setupLanguageVersionSettings(configuration: CompilerConfiguration, arguments: A) {
-        configuration.languageVersionSettings = arguments.configureLanguageVersionSettings(configuration.getNotNull(MESSAGE_COLLECTOR_KEY))
-    }
-
    protected abstract fun setupPlatformSpecificArgumentsAndServices(
        configuration: CompilerConfiguration, arguments: A, services: Services
    )
@@ -180,58 +134,5 @@ abstract class CLICompiler<A : CommonCompilerArguments> : CLITool<A>() {
        rootDisposable: Disposable,
        paths: KotlinPaths?
    ): ExitCode
-
-    companion object {
-
-        var KOTLIN_HOME_PROPERTY = "kotlin.home"
-
-        private fun computeKotlinPaths(messageCollector: MessageCollector, arguments: CommonCompilerArguments): KotlinPaths? {
-            val paths: KotlinPaths?
-            val kotlinHomeProperty = System.getProperty(KOTLIN_HOME_PROPERTY)
-            val kotlinHome = if (arguments.kotlinHome != null)
-                File(arguments.kotlinHome!!)
-            else if (kotlinHomeProperty != null)
-                File(kotlinHomeProperty)
-            else
-                null
-            if (kotlinHome != null) {
-                if (kotlinHome.isDirectory) {
-                    paths = KotlinPathsFromHomeDir(kotlinHome)
-                } else {
-                    messageCollector.report(ERROR, "Kotlin home does not exist or is not a directory: $kotlinHome", null)
-                    paths = null
-                }
-            } else {
-                paths = PathUtil.kotlinPathsForCompiler
-            }
-
-            if (paths != null) {
-                messageCollector.report(LOGGING, "Using Kotlin home directory " + paths.homePath, null)
-            }
-
-            return paths
-        }
-
-        fun getLibraryFromHome(
-            paths: KotlinPaths?,
-            getLibrary: Function1<KotlinPaths, File>,
-            libraryName: String,
-            messageCollector: MessageCollector,
-            noLibraryArgument: String
-        ): File? {
-            if (paths != null) {
-                val stdlibJar = getLibrary.invoke(paths)
-                if (stdlibJar.exists()) {
-                    return stdlibJar
-                }
-            }
-
-            messageCollector.report(
-                STRONG_WARNING, "Unable to find " + libraryName + " in the Kotlin home directory. " +
-                        "Pass either " + noLibraryArgument + " to prevent adding it to the classpath, " +
-                        "or the correct '-kotlin-home'", null
-            )
-            return null
-        }
-    }
 }
+
@@ -89,7 +89,7 @@ abstract class CLITool<A : CommonToolArguments> {
            messageCollector
        }

-        reportArgumentParseProblems(fixedMessageCollector, arguments)
+        fixedMessageCollector.reportArgumentParseProblems(arguments)
        return execImpl(fixedMessageCollector, services, arguments)
    }

@@ -0,0 +1,133 @@
+/*
+ * Copyright 2010-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.cli.common
+
+import org.jetbrains.kotlin.cli.common.arguments.CommonCompilerArguments
+import org.jetbrains.kotlin.cli.common.arguments.CommonToolArguments
+import org.jetbrains.kotlin.cli.common.arguments.ManualLanguageFeatureSetting
+import org.jetbrains.kotlin.cli.common.messages.CompilerMessageSeverity
+import org.jetbrains.kotlin.cli.common.messages.MessageCollector
+import org.jetbrains.kotlin.config.*
+import org.jetbrains.kotlin.metadata.deserialization.BinaryVersion
+import org.jetbrains.kotlin.utils.KotlinPaths
+import org.jetbrains.kotlin.utils.KotlinPathsFromHomeDir
+import org.jetbrains.kotlin.utils.PathUtil
+import java.io.File
+
+fun <A : CommonCompilerArguments> CompilerConfiguration.setupCommonArguments(
+    arguments: A,
+    createMetadataVersion: ((IntArray) -> BinaryVersion)? = null
+) {
+    put(CommonConfigurationKeys.DISABLE_INLINE, arguments.noInline)
+    putIfNotNull(CLIConfigurationKeys.INTELLIJ_PLUGIN_ROOT, arguments.intellijPluginRoot)
+    put(CommonConfigurationKeys.REPORT_OUTPUT_FILES, arguments.reportOutputFiles)
+
+    val metadataVersionString = arguments.metadataVersion
+    if (metadataVersionString != null) {
+        val versionArray = BinaryVersion.parseVersionArray(metadataVersionString)
+        val messageCollector = getNotNull(CLIConfigurationKeys.MESSAGE_COLLECTOR_KEY)
+        when {
+            versionArray == null -> messageCollector.report(
+                CompilerMessageSeverity.ERROR, "Invalid metadata version: $metadataVersionString", null
+            )
+            createMetadataVersion == null -> throw IllegalStateException("Unable to create metadata version: missing argument")
+            else -> put(CommonConfigurationKeys.METADATA_VERSION, createMetadataVersion(versionArray))
+        }
+    }
+
+    setupLanguageVersionSettings(arguments)
+
+    put(CommonConfigurationKeys.LIST_PHASES, arguments.listPhases)
+
+    listOf(
+        CommonConfigurationKeys.DISABLED_PHASES to arguments.disablePhases,
+        CommonConfigurationKeys.VERBOSE_PHASES to arguments.verbosePhases,
+        CommonConfigurationKeys.PHASES_TO_DUMP_STATE_BEFORE to arguments.phasesToDumpBefore,
+        CommonConfigurationKeys.PHASES_TO_DUMP_STATE_AFTER to arguments.phasesToDumpAfter,
+        CommonConfigurationKeys.PHASES_TO_DUMP_STATE to arguments.phasesToDump
+    ).forEach { (k, v) ->
+        if (v != null) put(k, setOf(*v))
+    }
+
+    put(CommonConfigurationKeys.PROFILE_PHASES, arguments.profilePhases)
+}
+
+fun <A : CommonCompilerArguments> CompilerConfiguration.setupLanguageVersionSettings(arguments: A) {
+    languageVersionSettings = arguments.toLanguageVersionSettings(getNotNull(CLIConfigurationKeys.MESSAGE_COLLECTOR_KEY))
+}
+
+const val KOTLIN_HOME_PROPERTY = "kotlin.home"
+
+fun computeKotlinPaths(messageCollector: MessageCollector, arguments: CommonCompilerArguments): KotlinPaths? {
+    val kotlinHomeProperty = System.getProperty(KOTLIN_HOME_PROPERTY)
+    val kotlinHome = when {
+        arguments.kotlinHome != null -> File(arguments.kotlinHome!!)
+        kotlinHomeProperty != null -> File(kotlinHomeProperty)
+        else -> null
+    }
+
+    return when {
+        kotlinHome == null -> PathUtil.kotlinPathsForCompiler
+        kotlinHome.isDirectory -> KotlinPathsFromHomeDir(kotlinHome)
+        else -> {
+            messageCollector.report(CompilerMessageSeverity.ERROR, "Kotlin home does not exist or is not a directory: $kotlinHome", null)
+            null
+        }
+    }?.also {
+        messageCollector.report(CompilerMessageSeverity.LOGGING, "Using Kotlin home directory " + it.homePath, null)
+    }
+}
+
+fun <A : CommonToolArguments> MessageCollector.reportArgumentParseProblems(arguments: A) {
+    val errors = arguments.errors ?: return
+    for (flag in errors.unknownExtraFlags) {
+        report(CompilerMessageSeverity.STRONG_WARNING, "Flag is not supported by this version of the compiler: $flag")
+    }
+    for (argument in errors.extraArgumentsPassedInObsoleteForm) {
+        report(
+            CompilerMessageSeverity.STRONG_WARNING,
+            "Advanced option value is passed in an obsolete form. Please use the '=' character to specify the value: $argument=..."
+        )
+    }
+    for ((key, value) in errors.duplicateArguments) {
+        report(CompilerMessageSeverity.STRONG_WARNING, "Argument $key is passed multiple times. Only the last value will be used: $value")
+    }
+    for ((deprecatedName, newName) in errors.deprecatedArguments) {
+        report(CompilerMessageSeverity.STRONG_WARNING, "Argument $deprecatedName is deprecated. Please use $newName instead")
+    }
+    for (argfileError in errors.argfileErrors) {
+        report(CompilerMessageSeverity.STRONG_WARNING, argfileError)
+    }
+
+    reportUnsafeInternalArgumentsIfAny(arguments)
+
+    for (internalArgumentsError in errors.internalArgumentsParsingProblems) {
+        report(CompilerMessageSeverity.STRONG_WARNING, internalArgumentsError)
+    }
+}
+
+private fun <A : CommonToolArguments> MessageCollector.reportUnsafeInternalArgumentsIfAny(arguments: A) {
+    val unsafeArguments = arguments.internalArguments.filterNot {
+        // -XXLanguage which turns on BUG_FIX considered safe
+        it is ManualLanguageFeatureSetting && it.languageFeature.kind == LanguageFeature.Kind.BUG_FIX && it.state == LanguageFeature.State.ENABLED
+    }
+
+    if (unsafeArguments.isNotEmpty()) {
+        val unsafeArgumentsString = unsafeArguments.joinToString(prefix = "\n", postfix = "\n\n", separator = "\n") {
+            it.stringRepresentation
+        }
+
+        report(
+            CompilerMessageSeverity.STRONG_WARNING,
+            "ATTENTION!\n" +
+                    "This build uses unsafe internal compiler arguments:\n" +
+                    unsafeArgumentsString +
+                    "This mode is not recommended for production use,\n" +
+                    "as no stability/compatibility guarantees are given on\n" +
+                    "compiler or generated code. Use it at your own risk!\n"
+        )
+    }
+}
@@ -23,6 +23,8 @@ import org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.isSubpackageOf
 import org.jetbrains.kotlin.psi.KtFile
+import org.jetbrains.kotlin.utils.KotlinPaths
+import java.io.File

 fun checkKotlinPackageUsage(environment: KotlinCoreEnvironment, files: Collection<KtFile>): Boolean {
    if (environment.configuration.getBoolean(CLIConfigurationKeys.ALLOW_KOTLIN_PACKAGE)) {
@@ -42,3 +44,25 @@ fun checkKotlinPackageUsage(environment: KotlinCoreEnvironment, files: Collectio
    }
    return true
 }
+
+fun getLibraryFromHome(
+    paths: KotlinPaths?,
+    getLibrary: (KotlinPaths) -> File,
+    libraryName: String,
+    messageCollector: MessageCollector,
+    noLibraryArgument: String
+): File? {
+    if (paths != null) {
+        val stdlibJar = getLibrary(paths)
+        if (stdlibJar.exists()) {
+            return stdlibJar
+        }
+    }
+
+    messageCollector.report(
+        CompilerMessageSeverity.STRONG_WARNING, "Unable to find " + libraryName + " in the Kotlin home directory. " +
+                "Pass either " + noLibraryArgument + " to prevent adding it to the classpath, " +
+                "or the correct '-kotlin-home'", null
+    )
+    return null
+}
@@ -77,6 +77,7 @@ import java.util.*;
 import static org.jetbrains.kotlin.cli.common.ExitCode.COMPILATION_ERROR;
 import static org.jetbrains.kotlin.cli.common.ExitCode.OK;
 import static org.jetbrains.kotlin.cli.common.UtilsKt.checkKotlinPackageUsage;
+import static org.jetbrains.kotlin.cli.common.UtilsKt.getLibraryFromHome;
 import static org.jetbrains.kotlin.cli.common.messages.CompilerMessageSeverity.*;

 public class K2JSCompiler extends CLICompiler<K2JSCompilerArguments> {
@@ -460,7 +461,7 @@ public class K2JSCompiler extends CLICompiler<K2JSCompilerArguments> {
    ) {
        List<String> libraries = new SmartList<>();
        if (!arguments.getNoStdlib()) {
-            File stdlibJar = Companion.getLibraryFromHome(
+            File stdlibJar = getLibraryFromHome(
                    paths, KotlinPaths::getJsStdLibJarPath, PathUtil.JS_LIB_JAR_NAME, messageCollector, "'-no-stdlib'");
            if (stdlibJar != null) {
                libraries.add(stdlibJar.getAbsolutePath());
@@ -31,10 +31,7 @@ import org.jetbrains.kotlin.cli.jvm.compiler.CompileEnvironmentUtil
 import org.jetbrains.kotlin.cli.jvm.compiler.EnvironmentConfigFiles
 import org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment
 import org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler
-import org.jetbrains.kotlin.cli.jvm.config.JvmClasspathRoot
-import org.jetbrains.kotlin.cli.jvm.config.JvmModulePathRoot
 import org.jetbrains.kotlin.cli.jvm.config.addJavaSourceRoot
-import org.jetbrains.kotlin.cli.jvm.modules.CoreJrtFileSystem
 import org.jetbrains.kotlin.cli.jvm.plugins.PluginCliParser
 import org.jetbrains.kotlin.cli.jvm.repl.ReplFromTerminal
 import org.jetbrains.kotlin.codegen.CompilationException
@@ -66,13 +63,9 @@ class K2JVMCompiler : CLICompiler<K2JVMCompilerArguments>() {
    ): ExitCode {
        val messageCollector = configuration.getNotNull(CLIConfigurationKeys.MESSAGE_COLLECTOR_KEY)

-        configureJdkHome(arguments, configuration, messageCollector).let {
-            if (it != OK) return it
-        }
+        if (!configuration.configureJdkHome(arguments)) return COMPILATION_ERROR

-        if (arguments.disableStandardScript) {
-            configuration.put(JVMConfigurationKeys.DISABLE_STANDARD_SCRIPT_DEFINITION, true)
-        }
+        configuration.put(JVMConfigurationKeys.DISABLE_STANDARD_SCRIPT_DEFINITION, arguments.disableStandardScript)

        val pluginLoadResult = loadPlugins(arguments, configuration)
        if (pluginLoadResult != ExitCode.OK) return pluginLoadResult
@@ -94,7 +87,8 @@ class K2JVMCompiler : CLICompiler<K2JVMCompilerArguments>() {

        configuration.put(CommonConfigurationKeys.MODULE_NAME, arguments.moduleName ?: JvmAbi.DEFAULT_MODULE_NAME)

-        configureContentRoots(paths, arguments, configuration)
+        configuration.configureExplicitContentRoots(arguments)
+        configuration.configureStandardLibs(paths, arguments)

        if (arguments.buildFile == null && arguments.freeArgs.isEmpty() && !arguments.version) {
            if (arguments.script) {
@@ -105,29 +99,7 @@ class K2JVMCompiler : CLICompiler<K2JVMCompilerArguments>() {
            return ExitCode.OK
        }

-        if (arguments.includeRuntime) {
-            configuration.put(JVMConfigurationKeys.INCLUDE_RUNTIME, true)
-        }
-        val friendPaths = arguments.friendPaths?.toList()
-        if (friendPaths != null) {
-            configuration.put(JVMConfigurationKeys.FRIEND_PATHS, friendPaths)
-        }
-
-        if (arguments.jvmTarget != null) {
-            val jvmTarget = JvmTarget.fromString(arguments.jvmTarget!!)
-            if (jvmTarget != null) {
-                configuration.put(JVMConfigurationKeys.JVM_TARGET, jvmTarget)
-            } else {
-                messageCollector.report(
-                    ERROR, "Unknown JVM target version: ${arguments.jvmTarget}\n" +
-                            "Supported versions: ${JvmTarget.values().joinToString { it.description }}"
-                )
-            }
-        }
-
-        configuration.put(JVMConfigurationKeys.PARAMETERS_METADATA, arguments.javaParameters)
-
-        putAdvancedOptions(configuration, arguments)
+        configuration.configureAdvancedJvmOptions(arguments)

        messageCollector.report(LOGGING, "Configuring the compilation environment")
        try {
@@ -152,7 +124,7 @@ class K2JVMCompiler : CLICompiler<K2JVMCompilerArguments>() {
                val environment = createCoreEnvironment(rootDisposable, configuration, messageCollector)
                    ?: return COMPILATION_ERROR

-                registerJavacIfNeeded(environment, arguments).let {
+                environment.registerJavacIfNeeded(arguments).let {
                    if (!it) return COMPILATION_ERROR
                }

@@ -190,7 +162,7 @@ class K2JVMCompiler : CLICompiler<K2JVMCompilerArguments>() {
                val environment = createCoreEnvironment(rootDisposable, configuration, messageCollector)
                    ?: return COMPILATION_ERROR

-                registerJavacIfNeeded(environment, arguments).let {
+                environment.registerJavacIfNeeded(arguments).let {
                    if (!it) return COMPILATION_ERROR
                }

@@ -263,21 +235,6 @@ class K2JVMCompiler : CLICompiler<K2JVMCompilerArguments>() {
        return PluginCliParser.loadPluginsSafe(pluginClasspaths, pluginOptions, configuration)
    }

-    private fun registerJavacIfNeeded(
-        environment: KotlinCoreEnvironment,
-        arguments: K2JVMCompilerArguments
-    ): Boolean {
-        if (arguments.useJavac) {
-            environment.configuration.put(JVMConfigurationKeys.USE_JAVAC, true)
-            if (arguments.compileJava) {
-                environment.configuration.put(JVMConfigurationKeys.COMPILE_JAVA, true)
-            }
-            return environment.registerJavac(arguments = arguments.javacArguments)
-        }
-
-        return true
-    }
-
    private fun compileJavaFilesIfNeeded(
        environment: KotlinCoreEnvironment,
        arguments: K2JVMCompilerArguments
@@ -305,26 +262,20 @@ class K2JVMCompiler : CLICompiler<K2JVMCompilerArguments>() {
    override fun setupPlatformSpecificArgumentsAndServices(
        configuration: CompilerConfiguration, arguments: K2JVMCompilerArguments, services: Services
    ) {
-        if (IncrementalCompilation.isEnabledForJvm()) {
-            services[LookupTracker::class.java]?.let {
-                configuration.put(CommonConfigurationKeys.LOOKUP_TRACKER, it)
-            }
+        with(configuration) {
+            if (IncrementalCompilation.isEnabledForJvm()) {
+                putIfNotNull(CommonConfigurationKeys.LOOKUP_TRACKER, services[LookupTracker::class.java])

-            services[ExpectActualTracker::class.java]?.let {
-                configuration.put(CommonConfigurationKeys.EXPECT_ACTUAL_TRACKER, it)
-            }
+                putIfNotNull(CommonConfigurationKeys.EXPECT_ACTUAL_TRACKER, services[ExpectActualTracker::class.java])

-            services[IncrementalCompilationComponents::class.java]?.let {
-                configuration.put(JVMConfigurationKeys.INCREMENTAL_COMPILATION_COMPONENTS, it)
-            }
+                putIfNotNull(
+                    JVMConfigurationKeys.INCREMENTAL_COMPILATION_COMPONENTS,
+                    services[IncrementalCompilationComponents::class.java]
+                )

-            services[JavaClassesTracker::class.java]?.let {
-                configuration.put(JVMConfigurationKeys.JAVA_CLASSES_TRACKER, it)
+                putIfNotNull(JVMConfigurationKeys.JAVA_CLASSES_TRACKER, services[JavaClassesTracker::class.java])
            }
-        }
-
-        arguments.additionalJavaModules?.let { additionalJavaModules ->
-            configuration.addAll(JVMConfigurationKeys.ADDITIONAL_JAVA_MODULES, additionalJavaModules.toList())
+            setupJvmSpecificArguments(arguments)
        }
    }

@@ -346,131 +297,8 @@ class K2JVMCompiler : CLICompiler<K2JVMCompilerArguments>() {
            CLITool.doMain(K2JVMCompiler(), args)
        }

-        private fun putAdvancedOptions(configuration: CompilerConfiguration, arguments: K2JVMCompilerArguments) {
-            configuration.put(JVMConfigurationKeys.IR, arguments.useIR)
-            configuration.put(JVMConfigurationKeys.DISABLE_CALL_ASSERTIONS, arguments.noCallAssertions)
-            configuration.put(JVMConfigurationKeys.DISABLE_RECEIVER_ASSERTIONS, arguments.noReceiverAssertions)
-            configuration.put(JVMConfigurationKeys.DISABLE_PARAM_ASSERTIONS, arguments.noParamAssertions)
-            configuration.put(
-                JVMConfigurationKeys.NO_EXCEPTION_ON_EXPLICIT_EQUALS_FOR_BOXED_NULL,
-                arguments.noExceptionOnExplicitEqualsForBoxedNull
-            )
-            configuration.put(JVMConfigurationKeys.DISABLE_OPTIMIZATION, arguments.noOptimize)
-
-            if (!JVMConstructorCallNormalizationMode.isSupportedValue(arguments.constructorCallNormalizationMode)) {
-                configuration.getNotNull(CLIConfigurationKeys.MESSAGE_COLLECTOR_KEY).report(
-                    ERROR,
-                    "Unknown constructor call normalization mode: ${arguments.constructorCallNormalizationMode}, " +
-                            "supported modes: ${JVMConstructorCallNormalizationMode.values().map { it.description }}"
-                )
-            }
-
-            val constructorCallNormalizationMode =
-                JVMConstructorCallNormalizationMode.fromStringOrNull(arguments.constructorCallNormalizationMode)
-            if (constructorCallNormalizationMode != null) {
-                configuration.put(
-                    JVMConfigurationKeys.CONSTRUCTOR_CALL_NORMALIZATION_MODE,
-                    constructorCallNormalizationMode
-                )
-            }
-
-            val assertionsMode =
-                JVMAssertionsMode.fromStringOrNull(arguments.assertionsMode)
-            if (assertionsMode == null) {
-                configuration.getNotNull(CLIConfigurationKeys.MESSAGE_COLLECTOR_KEY).report(
-                    ERROR,
-                    "Unknown assertions mode: ${arguments.assertionsMode}, " +
-                            "supported modes: ${JVMAssertionsMode.values().map { it.description }}"
-                )
-            }
-            configuration.put(
-                JVMConfigurationKeys.ASSERTIONS_MODE,
-                assertionsMode ?: JVMAssertionsMode.DEFAULT
-            )
-
-            configuration.put(JVMConfigurationKeys.USE_TYPE_TABLE, arguments.useTypeTable)
-            configuration.put(JVMConfigurationKeys.SKIP_RUNTIME_VERSION_CHECK, arguments.skipRuntimeVersionCheck)
-            configuration.put(JVMConfigurationKeys.USE_FAST_CLASS_FILES_READING, !arguments.useOldClassFilesReading)
-
-            if (arguments.useOldClassFilesReading) {
-                configuration.getNotNull(CLIConfigurationKeys.MESSAGE_COLLECTOR_KEY)
-                    .report(INFO, "Using the old java class files reading implementation")
-            }
-
-            configuration.put(CLIConfigurationKeys.ALLOW_KOTLIN_PACKAGE, arguments.allowKotlinPackage)
-            configuration.put(JVMConfigurationKeys.USE_SINGLE_MODULE, arguments.singleModule)
-            configuration.put(JVMConfigurationKeys.ADD_BUILT_INS_FROM_COMPILER_TO_DEPENDENCIES, arguments.addCompilerBuiltIns)
-            configuration.put(JVMConfigurationKeys.CREATE_BUILT_INS_FROM_MODULE_DEPENDENCIES, arguments.loadBuiltInsFromDependencies)
-
-            arguments.declarationsOutputPath?.let { configuration.put(JVMConfigurationKeys.DECLARATIONS_JSON_PATH, it) }
-        }
-
-        private fun configureContentRoots(paths: KotlinPaths?, arguments: K2JVMCompilerArguments, configuration: CompilerConfiguration) {
-            for (modularRoot in arguments.javaModulePath?.split(File.pathSeparatorChar).orEmpty()) {
-                configuration.add(CLIConfigurationKeys.CONTENT_ROOTS, JvmModulePathRoot(File(modularRoot)))
-            }
-
-            if (arguments.buildFile != null) {
-                // In the .xml compilation mode, all content roots except module path will be loaded from the .xml build file.
-                return
-            }
-
-            val messageCollector = configuration.getNotNull(CLIConfigurationKeys.MESSAGE_COLLECTOR_KEY)
-            for (path in arguments.classpath?.split(File.pathSeparatorChar).orEmpty()) {
-                configuration.add(CLIConfigurationKeys.CONTENT_ROOTS, JvmClasspathRoot(File(path)))
-            }
-
-            val isModularJava = configuration.get(JVMConfigurationKeys.JDK_HOME).let { it != null && CoreJrtFileSystem.isModularJdk(it) }
-            fun addRoot(moduleName: String, libraryName: String, getLibrary: (KotlinPaths) -> File, noLibraryArgument: String) {
-                val file = getLibraryFromHome(paths, getLibrary, libraryName, messageCollector, noLibraryArgument) ?: return
-                if (isModularJava) {
-                    configuration.add(CLIConfigurationKeys.CONTENT_ROOTS, JvmModulePathRoot(file))
-                    configuration.add(JVMConfigurationKeys.ADDITIONAL_JAVA_MODULES, moduleName)
-                } else {
-                    configuration.add(CLIConfigurationKeys.CONTENT_ROOTS, JvmClasspathRoot(file))
-                }
-            }
-
-            if (!arguments.noStdlib) {
-                addRoot("kotlin.stdlib", PathUtil.KOTLIN_JAVA_STDLIB_JAR, KotlinPaths::getStdlibPath, "'-no-stdlib'")
-                addRoot("kotlin.script.runtime", PathUtil.KOTLIN_JAVA_SCRIPT_RUNTIME_JAR, KotlinPaths::getScriptRuntimePath, "'-no-stdlib'")
-            }
-            // "-no-stdlib" implies "-no-reflect": otherwise we would be able to transitively read stdlib classes through kotlin-reflect,
-            // which is likely not what user wants since s/he manually provided "-no-stdlib"
-            if (!arguments.noReflect && !arguments.noStdlib) {
-                addRoot("kotlin.reflect", PathUtil.KOTLIN_JAVA_REFLECT_JAR, KotlinPaths::getReflectPath, "'-no-reflect' or '-no-stdlib'")
-            }
-        }
-
-        private fun configureJdkHome(
-            arguments: K2JVMCompilerArguments,
-            configuration: CompilerConfiguration,
-            messageCollector: MessageCollector
-        ): ExitCode {
-            if (arguments.noJdk) {
-                configuration.put(JVMConfigurationKeys.NO_JDK, true)
-
-                if (arguments.jdkHome != null) {
-                    messageCollector.report(STRONG_WARNING, "The '-jdk-home' option is ignored because '-no-jdk' is specified")
-                }
-                return OK
-            }
-
-            if (arguments.jdkHome != null) {
-                val jdkHome = File(arguments.jdkHome)
-                if (!jdkHome.exists()) {
-                    messageCollector.report(ERROR, "JDK home directory does not exist: $jdkHome")
-                    return COMPILATION_ERROR
-                }
-
-                messageCollector.report(LOGGING, "Using JDK home directory $jdkHome")
-
-                configuration.put(JVMConfigurationKeys.JDK_HOME, jdkHome)
-            }
-
-            return OK
-        }
    }
 }

+
 fun main(args: Array<String>) = K2JVMCompiler.main(args)
@@ -0,0 +1,202 @@
+/*
+ * Copyright 2010-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.cli.jvm
+
+import org.jetbrains.kotlin.cli.common.CLIConfigurationKeys
+import org.jetbrains.kotlin.cli.common.arguments.K2JVMCompilerArguments
+import org.jetbrains.kotlin.cli.common.getLibraryFromHome
+import org.jetbrains.kotlin.cli.common.messages.CompilerMessageSeverity.*
+import org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment
+import org.jetbrains.kotlin.cli.jvm.config.JvmClasspathRoot
+import org.jetbrains.kotlin.cli.jvm.config.JvmModulePathRoot
+import org.jetbrains.kotlin.cli.jvm.modules.CoreJrtFileSystem
+import org.jetbrains.kotlin.config.*
+import org.jetbrains.kotlin.utils.KotlinPaths
+import org.jetbrains.kotlin.utils.PathUtil
+import java.io.File
+
+fun CompilerConfiguration.setupJvmSpecificArguments(arguments: K2JVMCompilerArguments) {
+
+    val messageCollector = getNotNull(CLIConfigurationKeys.MESSAGE_COLLECTOR_KEY)
+
+    put(JVMConfigurationKeys.INCLUDE_RUNTIME, arguments.includeRuntime)
+
+    putIfNotNull(JVMConfigurationKeys.FRIEND_PATHS, arguments.friendPaths?.asList())
+
+    if (arguments.jvmTarget != null) {
+        val jvmTarget = JvmTarget.fromString(arguments.jvmTarget!!)
+        if (jvmTarget != null) {
+            put(JVMConfigurationKeys.JVM_TARGET, jvmTarget)
+        } else {
+            messageCollector.report(
+                ERROR, "Unknown JVM target version: ${arguments.jvmTarget}\n" +
+                        "Supported versions: ${JvmTarget.values().joinToString { it.description }}"
+            )
+        }
+    }
+
+    addAll(JVMConfigurationKeys.ADDITIONAL_JAVA_MODULES, arguments.additionalJavaModules?.asList())
+}
+
+fun CompilerConfiguration.configureJdkHome(arguments: K2JVMCompilerArguments): Boolean {
+
+    val messageCollector = getNotNull(CLIConfigurationKeys.MESSAGE_COLLECTOR_KEY)
+
+    if (arguments.noJdk) {
+        put(JVMConfigurationKeys.NO_JDK, true)
+
+        if (arguments.jdkHome != null) {
+            messageCollector.report(STRONG_WARNING, "The '-jdk-home' option is ignored because '-no-jdk' is specified")
+        }
+        return true
+    }
+
+    if (arguments.jdkHome != null) {
+        val jdkHome = File(arguments.jdkHome)
+        if (!jdkHome.exists()) {
+            messageCollector.report(ERROR, "JDK home directory does not exist: $jdkHome")
+            return false
+        }
+
+        messageCollector.report(LOGGING, "Using JDK home directory $jdkHome")
+
+        put(JVMConfigurationKeys.JDK_HOME, jdkHome)
+    }
+
+    return true
+}
+
+fun CompilerConfiguration.configureExplicitContentRoots(arguments: K2JVMCompilerArguments) {
+    for (modularRoot in arguments.javaModulePath?.split(File.pathSeparatorChar).orEmpty()) {
+        add(CLIConfigurationKeys.CONTENT_ROOTS, JvmModulePathRoot(File(modularRoot)))
+    }
+
+    if (arguments.buildFile != null) {
+        // In the .xml compilation mode, all content roots except module path will be loaded from the .xml build file.
+        return
+    }
+
+    for (path in arguments.classpath?.split(File.pathSeparatorChar).orEmpty()) {
+        add(CLIConfigurationKeys.CONTENT_ROOTS, JvmClasspathRoot(File(path)))
+    }
+}
+
+fun CompilerConfiguration.configureStandardLibs(paths: KotlinPaths?, arguments: K2JVMCompilerArguments) {
+    val messageCollector = getNotNull(CLIConfigurationKeys.MESSAGE_COLLECTOR_KEY)
+    val isModularJava = isModularJava()
+
+    fun addRoot(moduleName: String, libraryName: String, getLibrary: (KotlinPaths) -> File, noLibraryArgument: String) {
+        addModularRootIfNotNull(
+            isModularJava, moduleName,
+            getLibraryFromHome(paths, getLibrary, libraryName, messageCollector, noLibraryArgument)
+        )
+    }
+
+    if (!arguments.noStdlib) {
+        addRoot("kotlin.stdlib", PathUtil.KOTLIN_JAVA_STDLIB_JAR, KotlinPaths::getStdlibPath, "'-no-stdlib'")
+        addRoot("kotlin.script.runtime", PathUtil.KOTLIN_JAVA_SCRIPT_RUNTIME_JAR, KotlinPaths::getScriptRuntimePath, "'-no-stdlib'")
+    }
+    // "-no-stdlib" implies "-no-reflect": otherwise we would be able to transitively read stdlib classes through kotlin-reflect,
+    // which is likely not what user wants since s/he manually provided "-no-stdlib"
+    if (!arguments.noReflect && !arguments.noStdlib) {
+        addRoot("kotlin.reflect", PathUtil.KOTLIN_JAVA_REFLECT_JAR, KotlinPaths::getReflectPath, "'-no-reflect' or '-no-stdlib'")
+    }
+}
+
+fun CompilerConfiguration.isModularJava(): Boolean {
+    return get(JVMConfigurationKeys.JDK_HOME)?.let {
+        CoreJrtFileSystem.isModularJdk(it)
+    } ?: false
+}
+
+fun CompilerConfiguration.addModularRootIfNotNull(isModularJava: Boolean, moduleName: String, file: File?) {
+    when {
+        file == null -> {
+        }
+        isModularJava -> {
+            add(CLIConfigurationKeys.CONTENT_ROOTS, JvmModulePathRoot(file))
+            add(JVMConfigurationKeys.ADDITIONAL_JAVA_MODULES, moduleName)
+        }
+        else -> add(CLIConfigurationKeys.CONTENT_ROOTS, JvmClasspathRoot(file))
+    }
+}
+
+fun KotlinCoreEnvironment.registerJavacIfNeeded(
+    arguments: K2JVMCompilerArguments
+): Boolean {
+    if (arguments.useJavac) {
+        configuration.put(JVMConfigurationKeys.USE_JAVAC, true)
+        if (arguments.compileJava) {
+            configuration.put(JVMConfigurationKeys.COMPILE_JAVA, true)
+        }
+        return registerJavac(arguments = arguments.javacArguments)
+    }
+
+    return true
+}
+
+
+fun CompilerConfiguration.configureAdvancedJvmOptions(arguments: K2JVMCompilerArguments) {
+
+    put(JVMConfigurationKeys.PARAMETERS_METADATA, arguments.javaParameters)
+
+    put(JVMConfigurationKeys.IR, arguments.useIR)
+    put(JVMConfigurationKeys.DISABLE_CALL_ASSERTIONS, arguments.noCallAssertions)
+    put(JVMConfigurationKeys.DISABLE_RECEIVER_ASSERTIONS, arguments.noReceiverAssertions)
+    put(JVMConfigurationKeys.DISABLE_PARAM_ASSERTIONS, arguments.noParamAssertions)
+    put(
+        JVMConfigurationKeys.NO_EXCEPTION_ON_EXPLICIT_EQUALS_FOR_BOXED_NULL,
+        arguments.noExceptionOnExplicitEqualsForBoxedNull
+    )
+    put(JVMConfigurationKeys.DISABLE_OPTIMIZATION, arguments.noOptimize)
+
+    if (!JVMConstructorCallNormalizationMode.isSupportedValue(arguments.constructorCallNormalizationMode)) {
+        getNotNull(CLIConfigurationKeys.MESSAGE_COLLECTOR_KEY).report(
+            ERROR,
+            "Unknown constructor call normalization mode: ${arguments.constructorCallNormalizationMode}, " +
+                    "supported modes: ${JVMConstructorCallNormalizationMode.values().map { it.description }}"
+        )
+    }
+
+    val constructorCallNormalizationMode =
+        JVMConstructorCallNormalizationMode.fromStringOrNull(arguments.constructorCallNormalizationMode)
+    if (constructorCallNormalizationMode != null) {
+        put(
+            JVMConfigurationKeys.CONSTRUCTOR_CALL_NORMALIZATION_MODE,
+            constructorCallNormalizationMode
+        )
+    }
+
+    val assertionsMode =
+        JVMAssertionsMode.fromStringOrNull(arguments.assertionsMode)
+    if (assertionsMode == null) {
+        getNotNull(CLIConfigurationKeys.MESSAGE_COLLECTOR_KEY).report(
+            ERROR,
+            "Unknown assertions mode: ${arguments.assertionsMode}, " +
+                    "supported modes: ${JVMAssertionsMode.values().map { it.description }}"
+        )
+    }
+    put(
+        JVMConfigurationKeys.ASSERTIONS_MODE,
+        assertionsMode ?: JVMAssertionsMode.DEFAULT
+    )
+
+    put(JVMConfigurationKeys.USE_TYPE_TABLE, arguments.useTypeTable)
+    put(JVMConfigurationKeys.SKIP_RUNTIME_VERSION_CHECK, arguments.skipRuntimeVersionCheck)
+    put(JVMConfigurationKeys.USE_FAST_CLASS_FILES_READING, !arguments.useOldClassFilesReading)
+
+    if (arguments.useOldClassFilesReading) {
+        getNotNull(CLIConfigurationKeys.MESSAGE_COLLECTOR_KEY)
+            .report(INFO, "Using the old java class files reading implementation")
+    }
+
+    put(CLIConfigurationKeys.ALLOW_KOTLIN_PACKAGE, arguments.allowKotlinPackage)
+    put(JVMConfigurationKeys.USE_SINGLE_MODULE, arguments.singleModule)
+    put(JVMConfigurationKeys.ADD_BUILT_INS_FROM_COMPILER_TO_DEPENDENCIES, arguments.addCompilerBuiltIns)
+    put(JVMConfigurationKeys.CREATE_BUILT_INS_FROM_MODULE_DEPENDENCIES, arguments.loadBuiltInsFromDependencies)
+
+    arguments.declarationsOutputPath?.let { put(JVMConfigurationKeys.DECLARATIONS_JSON_PATH, it) }
+}
@@ -73,6 +73,12 @@ public class CompilerConfiguration {
        map.put(key.ideaKey, value);
    }

+    public <T> void putIfNotNull(@NotNull CompilerConfigurationKey<T> key, @Nullable T value) {
+        if (value != null) {
+            put(key, value);
+        }
+    }
+
    public <T> void add(@NotNull CompilerConfigurationKey<List<T>> key, @NotNull T value) {
        checkReadOnly();
        Key<List<T>> ideaKey = key.ideaKey;
@@ -89,8 +95,10 @@ public class CompilerConfiguration {
        data.put(key, value);
    }

-    public <T> void addAll(@NotNull CompilerConfigurationKey<List<T>> key, @NotNull Collection<T> values) {
-        addAll(key, getList(key).size(), values);
+    public <T> void addAll(@NotNull CompilerConfigurationKey<List<T>> key, @Nullable Collection<T> values) {
+        if (values != null) {
+            addAll(key, getList(key).size(), values);
+        }
    }

    public <T> void addAll(@NotNull CompilerConfigurationKey<List<T>> key, int index, @NotNull Collection<T> values) {
@@ -97,7 +97,7 @@ private fun getLanguageSettingsForScripts(project: Project, scriptDefinition: Ko
            val compilerArguments = K2JVMCompilerArguments()
            parseCommandLineArguments(args.toList(), compilerArguments)
            // TODO: reporting
-            val verSettings = compilerArguments.configureLanguageVersionSettings(MessageCollector.NONE)
+            val verSettings = compilerArguments.toLanguageVersionSettings(MessageCollector.NONE)
            val jvmTarget = compilerArguments.jvmTarget?.let { JvmTarget.fromString(it) } ?: TargetPlatformVersion.NoVersion
            ScriptLanguageSettings(verSettings, jvmTarget)
        }.also { scriptDefinition.putUserData(SCRIPT_LANGUAGE_SETTINGS, it) }