[ExternalSystem] cleanup: extract select project data logic from the project sync callback

### Issues
  * CPP-44637 Multiple meson test failures

GitOrigin-RevId: 92a4f71a09797cfec1d39088d2c85b9cc1e662b6

platform/external-system-api/api-dump.txt

@@ -316,6 +316,7 @@ com.intellij.openapi.externalSystem.importing.ImportSpec
 - a:isPreviewMode():Z
 - a:shouldCreateDirectoriesForEmptyContentRoots():Z
 - a:shouldImportProjectData():Z
+- a:shouldSelectProjectDataToImport():Z
 c:com.intellij.openapi.externalSystem.importing.ImportSpecBuilder
 - <init>(com.intellij.openapi.externalSystem.importing.ImportSpec):V
 - <init>(com.intellij.openapi.project.Project,com.intellij.openapi.externalSystem.model.ProjectSystemId):V
@@ -338,6 +339,7 @@ c:com.intellij.openapi.externalSystem.importing.ImportSpecBuilder
 - withImportProjectData(Z):com.intellij.openapi.externalSystem.importing.ImportSpecBuilder
 - withPreviewMode(Z):com.intellij.openapi.externalSystem.importing.ImportSpecBuilder
 - withRerunAction(java.lang.Runnable):com.intellij.openapi.externalSystem.importing.ImportSpecBuilder
+- withSelectProjectDataToImport(Z):com.intellij.openapi.externalSystem.importing.ImportSpecBuilder
 - withUserData(com.intellij.openapi.util.UserDataHolderBase):com.intellij.openapi.externalSystem.importing.ImportSpecBuilder
 - withVmOptions(java.lang.String):com.intellij.openapi.externalSystem.importing.ImportSpecBuilder
 c:com.intellij.openapi.externalSystem.model.DataNode

platform/external-system-api/src/com/intellij/openapi/externalSystem/importing/ImportSpec.java

@@ -47,6 +47,8 @@ public interface ImportSpec {
 
   boolean shouldImportProjectData();
 
+  boolean shouldSelectProjectDataToImport();
+
   boolean shouldCreateDirectoriesForEmptyContentRoots();
 
   boolean isActivateBuildToolWindowOnStart();

platform/external-system-api/src/com/intellij/openapi/externalSystem/importing/ImportSpecBuilder.java

@@ -34,6 +34,7 @@ public class ImportSpecBuilder {
   private @Nullable String myVmOptions = null;
   private @Nullable String myArguments = null;
   private boolean myImportProjectData = true;
+  private boolean mySelectProjectDataToImport = false;
   private boolean myCreateDirectoriesForEmptyContentRoots = false;
   private @Nullable ProjectResolverPolicy myProjectResolverPolicy = null;
   private @Nullable Runnable myRerunAction = null;
@@ -56,6 +57,7 @@ public class ImportSpecBuilder {
     myVmOptions = importSpec.getVmOptions();
     myArguments = importSpec.getArguments();
     myImportProjectData = importSpec.shouldImportProjectData();
+    mySelectProjectDataToImport = importSpec.shouldSelectProjectDataToImport();
     myCreateDirectoriesForEmptyContentRoots = importSpec.shouldCreateDirectoriesForEmptyContentRoots();
     myProjectResolverPolicy = importSpec.getProjectResolverPolicy();
     myRerunAction = importSpec.getRerunAction();
@@ -140,6 +142,12 @@ public class ImportSpecBuilder {
     return this;
   }
 
+  @CheckReturnValue
+  public ImportSpecBuilder withSelectProjectDataToImport(boolean selectProjectDataToImport) {
+    mySelectProjectDataToImport = selectProjectDataToImport;
+    return this;
+  }
+
   public ImportSpecBuilder createDirectoriesForEmptyContentRoots() {
     myCreateDirectoriesForEmptyContentRoots = true;
     return this;
@@ -212,6 +220,7 @@ public class ImportSpecBuilder {
       myCallback,
       isPreviewMode,
       myImportProjectData,
+      mySelectProjectDataToImport,
       myCreateDirectoriesForEmptyContentRoots,
       isActivateBuildToolWindowOnStart,
       isActivateBuildToolWindowOnFailure,

platform/external-system-api/src/com/intellij/openapi/externalSystem/importing/ImportSpecImpl.java

@@ -23,6 +23,7 @@ public final class ImportSpecImpl implements ImportSpec {
   private @Nullable ExternalProjectRefreshCallback myCallback;
   private boolean isPreviewMode;
   private boolean importProjectData;
+  private boolean selectProjectDataToImport;
   private boolean createDirectoriesForEmptyContentRoots;
   private boolean isActivateBuildToolWindowOnStart;
   private boolean isActivateBuildToolWindowOnFailure;
@@ -51,6 +52,7 @@ public final class ImportSpecImpl implements ImportSpec {
     @Nullable ExternalProjectRefreshCallback callback,
     boolean isPreviewMode,
     boolean importProjectData,
+    boolean selectProjectDataToImport,
     boolean createDirectoriesForEmptyContentRoots,
     boolean isActivateBuildToolWindowOnStart,
     boolean isActivateBuildToolWindowOnFailure,
@@ -67,6 +69,7 @@ public final class ImportSpecImpl implements ImportSpec {
     this.myCallback = callback;
     this.isPreviewMode = isPreviewMode;
     this.importProjectData = importProjectData;
+    this.selectProjectDataToImport = selectProjectDataToImport;
     this.createDirectoriesForEmptyContentRoots = createDirectoriesForEmptyContentRoots;
     this.isActivateBuildToolWindowOnStart = isActivateBuildToolWindowOnStart;
     this.isActivateBuildToolWindowOnFailure = isActivateBuildToolWindowOnFailure;
@@ -132,6 +135,11 @@ public final class ImportSpecImpl implements ImportSpec {
     return importProjectData;
   }
 
+  @Override
+  public boolean shouldSelectProjectDataToImport() {
+    return selectProjectDataToImport;
+  }
+
   @Override
   public boolean shouldCreateDirectoriesForEmptyContentRoots() {
     return createDirectoriesForEmptyContentRoots;

platform/external-system-impl/src/com/intellij/openapi/externalSystem/util/ExternalSystemUtil.java

@@ -53,6 +53,7 @@ import com.intellij.openapi.externalSystem.service.project.manage.ExternalProjec
 import com.intellij.openapi.externalSystem.service.project.manage.ExternalSystemTaskActivator;
 import com.intellij.openapi.externalSystem.service.project.manage.ProjectDataManagerImpl;
 import com.intellij.openapi.externalSystem.service.project.trusted.ExternalSystemTrustedProjectDialog;
+import com.intellij.openapi.externalSystem.service.ui.ExternalProjectDataSelectorDialog;
 import com.intellij.openapi.externalSystem.settings.AbstractExternalSystemLocalSettings;
 import com.intellij.openapi.externalSystem.settings.ExternalProjectSettings;
 import com.intellij.openapi.externalSystem.statistics.ExternalSystemStatUtilKt;
@@ -572,6 +573,9 @@ public final class ExternalSystemUtil {
             externalProject.putUserData(ContentRootDataService.CREATE_EMPTY_DIRECTORIES, Boolean.TRUE);
           }
           if (importSpec.shouldImportProjectData()) {
+            if (importSpec.shouldSelectProjectDataToImport()) {
+              selectProjectDataToImport(project, externalProjectData);
+            }
             projectDataManager.importData(externalProject, project);
           }
         }
@@ -625,6 +629,24 @@ public final class ExternalSystemUtil {
     }
   }
 
+  private static void selectProjectDataToImport(
+    @NotNull Project project,
+    @NotNull ExternalProjectInfo projectInfo
+  ) {
+    var application = ApplicationManager.getApplication();
+    if (!application.isHeadlessEnvironment()) {
+      application.invokeAndWait(() -> {
+        var dialog = new ExternalProjectDataSelectorDialog(project, projectInfo);
+        if (dialog.hasMultipleDataToSelect()) {
+          dialog.showAndGet();
+        }
+        else {
+          Disposer.dispose(dialog.getDisposable());
+        }
+      });
+    }
+  }
+
   private static @NotNull FinishBuildEvent getSyncFinishEvent(
     @NotNull ExternalSystemTaskId taskId,
     @NotNull Ref<? extends Supplier<? extends FinishBuildEvent>> finishSyncEventSupplier
@@ -1011,7 +1033,9 @@ public final class ExternalSystemUtil {
     //noinspection unchecked
     systemSettings.linkProject(projectSettings);
 
-    refreshProject(projectSettings.getExternalProjectPath(), importSpec);
+    refreshProject(projectSettings.getExternalProjectPath(), new ImportSpecBuilder(importSpec)
+      .withSelectProjectDataToImport(systemSettings.showSelectiveImportDialogOnInitialImport())
+    );
   }
 
   public static @Nullable VirtualFile refreshAndFindFileByIoFile(final @NotNull File file) {