project configuration: added registry option to automatically add tools.jar when a new JDK is created

When IDEA-99632 is implemented we can include option 'include tools.jar' to JDK requirements, so this workaround will become obsolete.

jps/model-impl/src/org/jetbrains/jps/model/java/impl/JavaSdkUtil.java

@@ -19,6 +19,7 @@ import com.intellij.openapi.util.SystemInfo;
 import com.intellij.openapi.util.io.FileFilters;
 import com.intellij.openapi.util.io.FileUtil;
 import com.intellij.openapi.util.io.FileUtilRt;
+import com.intellij.openapi.util.registry.Registry;
 import com.intellij.util.ArrayUtil;
 import com.intellij.util.containers.ContainerUtil;
 import org.jetbrains.annotations.NotNull;
@@ -70,6 +71,12 @@ public class JavaSdkUtil {
     FileFilter jarFileFilter = FileFilters.filesWithExtension("jar");
     Set<String> pathFilter = ContainerUtil.newTroveSet(FileUtil.PATH_HASHING_STRATEGY);
     List<File> rootFiles = ContainerUtil.newArrayList();
+    if (Registry.is("project.structure.add.tools.jar.to.new.jdk")) {
+      File toolsJar = new File(home, "lib/tools.jar");
+      if (toolsJar.isFile()) {
+        rootFiles.add(toolsJar);
+      }
+    }
     for (File jarDir : jarDirs) {
       if (jarDir != null && jarDir.isDirectory()) {
         File[] jarFiles = notNull(jarDir.listFiles(jarFileFilter), ArrayUtil.EMPTY_FILE_ARRAY);

platform/util/resources/misc/registry.properties

@@ -810,6 +810,8 @@ welcome.screen.project.grouping.enabled.description=Allows to group recent proje
 custom.folding.max.lookup.depth=50
 custom.folding.max.lookup.depth.description=Max lookup depth for custom folding comments in a PSI tree.
 
+project.structure.add.tools.jar.to.new.jdk=false
+project.structure.add.tools.jar.to.new.jdk.description=Automatically add tools.jar to 'Classpath' when new JDK is created
 
 tfs.set.connection.timeout=false