Check "kotlin" package usage when compiling common code

#KT-25369 Fixed

compiler/cli/src/org/jetbrains/kotlin/cli/metadata/K2MetadataCompiler.kt

@@ -17,10 +17,7 @@
 package org.jetbrains.kotlin.cli.metadata
 
 import com.intellij.openapi.Disposable
-import org.jetbrains.kotlin.cli.common.CLICompiler
-import org.jetbrains.kotlin.cli.common.CLIConfigurationKeys
-import org.jetbrains.kotlin.cli.common.CommonCompilerPerformanceManager
-import org.jetbrains.kotlin.cli.common.ExitCode
+import org.jetbrains.kotlin.cli.common.*
 import org.jetbrains.kotlin.cli.common.arguments.K2MetadataCompilerArguments
 import org.jetbrains.kotlin.cli.common.messages.CompilerMessageSeverity.*
 import org.jetbrains.kotlin.cli.common.messages.MessageUtil
@@ -71,6 +68,8 @@ class K2MetadataCompiler : CLICompiler<K2MetadataCompilerArguments>() {
 
         configuration.put(CommonConfigurationKeys.MODULE_NAME, arguments.moduleName ?: JvmAbi.DEFAULT_MODULE_NAME)
 
+        configuration.put(CLIConfigurationKeys.ALLOW_KOTLIN_PACKAGE, arguments.allowKotlinPackage)
+
         val destination = arguments.destination
         if (destination != null) {
             if (destination.endsWith(".jar")) {
@@ -90,6 +89,8 @@ class K2MetadataCompiler : CLICompiler<K2MetadataCompilerArguments>() {
             return ExitCode.COMPILATION_ERROR
         }
 
+        checkKotlinPackageUsage(environment, environment.getSourceFiles())
+
         try {
             val metadataVersion =
                 configuration.get(CommonConfigurationKeys.METADATA_VERSION) as? BuiltInsBinaryVersion ?: BuiltInsBinaryVersion.INSTANCE

compiler/testData/cli/metadata/kotlinPackage.args

@@ -0,0 +1,3 @@
+$TESTDATA_DIR$/../kotlinPackage.kt
+-d
+$TEMP_DIR$

compiler/testData/cli/metadata/kotlinPackage.out

@@ -0,0 +1,4 @@
+compiler/testData/cli/kotlinPackage.kt:1:1: error: only the Kotlin standard library is allowed to use the 'kotlin' package
+package kotlin.mylibrary
+^
+COMPILATION_ERROR

compiler/tests/org/jetbrains/kotlin/cli/CliTestGenerated.java

@@ -865,6 +865,11 @@ public class CliTestGenerated extends AbstractCliTest {
             KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/cli/metadata"), Pattern.compile("^(.+)\\.args$"), TargetBackend.ANY, false);
         }
 
+        @TestMetadata("kotlinPackage.args")
+        public void testKotlinPackage() throws Exception {
+            runTest("compiler/testData/cli/metadata/kotlinPackage.args");
+        }
+
         @TestMetadata("moduleName.args")
         public void testModuleName() throws Exception {
             runTest("compiler/testData/cli/metadata/moduleName.args");

libraries/stdlib/common/build.gradle

@@ -81,7 +81,8 @@ compileCoroutinesKotlinCommon {
         languageVersion = "1.3"
         apiVersion = "1.3"
         freeCompilerArgs = [
-                "-module-name", project.name
+                "-module-name", project.name,
+                "-Xallow-kotlin-package"
         ]
     }
 }