Workaround for building against jars from both JDK 6 and JDK 8 on TeamCity

jps-plugin/jps-tests/test/org/jetbrains/kotlin/jps/bothJdkClasspathPatcher.kt

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2010-2016 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.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.kotlin.jps
+
+import org.jetbrains.jps.cmdline.ClasspathBootstrap
+import java.lang.reflect.Field
+import java.lang.reflect.Modifier
+
+fun disableJava6FileManager() {
+    val fileManagerClass = ClasspathBootstrap.getOptimizedFileManagerClass()
+    if (fileManagerClass?.simpleName == "OptimizedFileManager") {
+        // JPS tests depends on idea.jar and can't be executed under Java 1.6 anymore. But currently TeamCity merges classpath from all
+        // dependencies in a one big mess with no differences between JDK and non-JDK jars. Such behaviour causes both
+        // JDK 8 and JDK 6 classes present in classpath. Next there's ClasspathBootstrap.OptimizedFileManagerClassHolder in idea
+        // that works through reflection and tries to choose correct FileManager that are not the same in JDK 6 and JDK 8. Choosing
+        // FileManager for JDK 6 leads to exceptions on Runtime as classes from JDK 8 goes first on teamcity.
+        //
+        // Here we disable JDK 6 FileManager with brute force.
+        val clazz = Class.forName("org.jetbrains.jps.cmdline.ClasspathBootstrap\$OptimizedFileManagerClassHolder")
+        setFinalStaticToNull(clazz.getDeclaredField("managerClass"))
+        setFinalStaticToNull(clazz.getDeclaredField("directoryCacheClearMethod"))
+    }
+}
+
+private fun setFinalStaticToNull(field: Field) {
+    field.isAccessible = true;
+
+    val modifiersField = (Field::class.java).getDeclaredField("modifiers")
+    modifiersField.isAccessible = true
+    modifiersField.setInt(field, field.modifiers and Modifier.FINAL.inv())
+
+    field.set(null, null)
+}

jps-plugin/jps-tests/test/org/jetbrains/kotlin/jps/build/AbstractIncrementalJpsTest.kt

@@ -46,6 +46,7 @@ import org.jetbrains.kotlin.incremental.CacheVersion
 import org.jetbrains.kotlin.incremental.LookupSymbol
 import org.jetbrains.kotlin.incremental.components.LookupTracker
 import org.jetbrains.kotlin.incremental.testingUtils.*
+import org.jetbrains.kotlin.jps.disableJava6FileManager
 import org.jetbrains.kotlin.jps.incremental.JpsLookupStorageProvider
 import org.jetbrains.kotlin.jps.incremental.KotlinDataContainerTarget
 import org.jetbrains.kotlin.jps.incremental.getKotlinCache
@@ -65,6 +66,10 @@ abstract class AbstractIncrementalJpsTest(
         private val allowNoBuildLogFileInTestData: Boolean = false
 ) : JpsBuildTestCase() {
     companion object {
+        init {
+            disableJava6FileManager()
+        }
+
         private val COMPILATION_FAILED = "COMPILATION FAILED"
 
         // change to "/tmp" or anything when default is too long (for easier debugging)

jps-plugin/jps-tests/test/org/jetbrains/kotlin/jps/build/AbstractKotlinJpsBuildTestCase.java

@@ -31,6 +31,7 @@ import org.jetbrains.jps.model.library.JpsTypedLibrary;
 import org.jetbrains.jps.model.library.sdk.JpsSdk;
 import org.jetbrains.jps.model.module.JpsModule;
 import org.jetbrains.jps.util.JpsPathUtil;
+import org.jetbrains.kotlin.jps.BothJdkClasspathPatcherKt;
 import org.jetbrains.kotlin.utils.PathUtil;
 
 import java.io.File;
@@ -40,6 +41,10 @@ import java.util.Collection;
 public abstract class AbstractKotlinJpsBuildTestCase extends JpsBuildTestCase {
     public static final String TEST_DATA_PATH = "jps-plugin/testData/";
 
+    static {
+        BothJdkClasspathPatcherKt.disableJava6FileManager();
+    }
+
     protected File workDir;
 
     @Override