private boolean needTransformCopying(CompileScope compileScope) {
   final CompilerConfiguration configuration = CompilerConfiguration.getInstance(myProject);
   final ProjectFileIndex index = ProjectRootManager.getInstance(myProject).getFileIndex();
   for (VirtualFile file :
       FilenameIndex.getVirtualFilesByName(
           myProject, AST_TRANSFORM_FILE_NAME, GlobalSearchScope.projectScope(myProject))) {
     if (compileScope.belongs(file.getUrl())
         && index.isInSource(file)
         && !configuration.isResourceFile(file)) {
       return true;
     }
   }
   return false;
 }
  @NotNull
  public static VirtualFile getTargetDirectoryFor(
      @NotNull Project project,
      @NotNull VirtualFile sourceFile,
      @Nullable String targetFile,
      @Nullable String targetPackage,
      boolean returnRoot) {
    boolean hasPackage = StringUtil.isNotEmpty(targetPackage);
    ProjectRootManager rootManager = ProjectRootManager.getInstance(project);
    ProjectFileIndex fileIndex = ProjectFileIndex.SERVICE.getInstance(project);
    Collection<VirtualFile> files =
        targetFile == null
            ? Collections.<VirtualFile>emptyList()
            : FilenameIndex.getVirtualFilesByName(
                project, targetFile, ProjectScope.getAllScope(project));

    VirtualFile existingFile = null;
    for (VirtualFile file : files) {
      String existingFilePackage = fileIndex.getPackageNameByDirectory(file.getParent());
      if (!hasPackage || existingFilePackage == null || targetPackage.equals(existingFilePackage)) {
        existingFile = file;
        break;
      }
    }

    VirtualFile existingFileRoot =
        existingFile == null
            ? null
            : fileIndex.isInSourceContent(existingFile)
                ? fileIndex.getSourceRootForFile(existingFile)
                : fileIndex.isInContent(existingFile)
                    ? fileIndex.getContentRootForFile(existingFile)
                    : null;

    boolean preferGenRoot =
        sourceFile.getFileType() == BnfFileType.INSTANCE
            || sourceFile.getFileType() == JFlexFileType.INSTANCE;
    boolean preferSourceRoot = hasPackage && !preferGenRoot;
    VirtualFile[] sourceRoots = rootManager.getContentSourceRoots();
    VirtualFile[] contentRoots = rootManager.getContentRoots();
    final VirtualFile virtualRoot =
        existingFileRoot != null
            ? existingFileRoot
            : preferSourceRoot && fileIndex.isInSource(sourceFile)
                ? fileIndex.getSourceRootForFile(sourceFile)
                : fileIndex.isInContent(sourceFile)
                    ? fileIndex.getContentRootForFile(sourceFile)
                    : getFirstElement(
                        preferSourceRoot && sourceRoots.length > 0 ? sourceRoots : contentRoots);
    if (virtualRoot == null) {
      fail(project, sourceFile, "Unable to guess target source root");
      throw new ProcessCanceledException();
    }
    try {
      String genDirName = Options.GEN_DIR.get();
      boolean newGenRoot = !fileIndex.isInSourceContent(virtualRoot);
      final String relativePath =
          (hasPackage && newGenRoot
                  ? genDirName + "/" + targetPackage
                  : hasPackage ? targetPackage : newGenRoot ? genDirName : "")
              .replace('.', '/');
      if (relativePath.isEmpty()) {
        return virtualRoot;
      } else {
        VirtualFile result =
            new WriteAction<VirtualFile>() {
              @Override
              protected void run(@NotNull Result<VirtualFile> result) throws Throwable {
                result.setResult(VfsUtil.createDirectoryIfMissing(virtualRoot, relativePath));
              }
            }.execute().throwException().getResultObject();
        VfsUtil.markDirtyAndRefresh(false, true, true, result);
        return returnRoot && newGenRoot
            ? ObjectUtils.assertNotNull(virtualRoot.findChild(genDirName))
            : returnRoot ? virtualRoot : result;
      }
    } catch (ProcessCanceledException ex) {
      throw ex;
    } catch (Exception ex) {
      fail(project, sourceFile, ex.getMessage());
      throw new ProcessCanceledException();
    }
  }