fix: Missing directories when view_project_root is on

fixes #6492

base/src/com/google/idea/blaze/base/sync/projectview/ImportRoots.java

@@ -42,12 +42,17 @@
 import com.google.idea.common.experiments.BoolExperiment;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.util.io.FileUtil;
+import org.jetbrains.annotations.NotNull;
 
+import java.io.File;
 import java.nio.file.FileSystems;
 import java.nio.file.Path;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
-import java.util.Objects;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Queue;
 import java.util.Set;
 import javax.annotation.Nullable;
 
@@ -148,10 +153,7 @@ public ImportRoots build() {
       }
 
       if (viewProjectRoot) {
-        Arrays.stream(Objects.requireNonNull(workspaceRoot.directory().listFiles()))
-            .filter(f -> f.isDirectory() && rootDirectoriesBuilder.build().stream().noneMatch(r -> FileUtil.filesEqual(workspaceRoot.fileForPath(r), f)))
-            .map(workspaceRoot::workspacePathFor)
-            .forEach(excludeDirectoriesBuilder::add);
+          selectExcludes(rootDirectoriesBuilder.build()).forEach(excludeDirectoriesBuilder::add);
       }
 
       ImmutableSet<WorkspacePath> minimalExcludes =
@@ -176,6 +178,20 @@ public ImportRoots build() {
       return new ImportRoots(directories, targets);
     }
 
+    private @NotNull List<WorkspacePath> selectExcludes(ImmutableCollection<WorkspacePath> rootDirectories) {
+      Queue<File> files = new LinkedList<>(Arrays.asList(workspaceRoot.directory().listFiles()));
+      var result = new ArrayList<File>();
+      while (!files.isEmpty()) {
+        File file = files.poll();
+        if (rootDirectories.stream().anyMatch(d -> FileUtil.isAncestor(file, workspaceRoot.fileForPath(d), /*strict=*/ true))) {
+          files.addAll(Arrays.asList(file.listFiles()));
+        } else if (rootDirectories.stream().noneMatch(d -> FileUtil.filesEqual(file, workspaceRoot.fileForPath(d)))) {
+            result.add(file);
+        }
+      }
+      return result.stream().map(workspaceRoot::workspacePathFor).toList();
+    }
+
     private void excludeBuildSystemArtifacts() {
       for (String dir :
           BuildSystemProvider.getBuildSystemProvider(buildSystemName)