Don't create QL pack if user escapes out of prompt (#3062)

extensions/ql-vscode/src/common/vscode/workspace-folders.ts

@@ -43,7 +43,9 @@ export function getFirstWorkspaceFolder() {
   const workspaceFolders = getOnDiskWorkspaceFolders();
 
   if (!workspaceFolders || workspaceFolders.length === 0) {
-    throw new Error("No workspace folders found");
+    throw new Error(
+      "No workspace folders found. Please open a folder or workspace in VS Code.",
+    );
   }
 
   const firstFolderFsPath = workspaceFolders[0];

extensions/ql-vscode/src/databases/local-databases/database-manager.ts

@@ -265,7 +265,7 @@ export class DatabaseManager extends DisposableObject {
       `We've noticed you don't have a CodeQL pack available to analyze this database. Can we set up a query pack for you?`,
     );
 
-    if (answer === "No") {
+    if (answer === "No" || answer === undefined) {
       return;
     }
 

extensions/ql-vscode/test/vscode-tests/minimal-workspace/local-queries/local-databases.test.ts

@@ -622,6 +622,16 @@ describe("local databases", () => {
         expect(generateSpy).not.toBeCalled();
       });
 
+      it("should return early if the user escapes out of the dialog", async () => {
+        showNeverAskAgainDialogSpy = jest
+          .spyOn(dialog, "showNeverAskAgainDialog")
+          .mockResolvedValue(undefined);
+
+        await (databaseManager as any).createSkeletonPacks(mockDbItem);
+
+        expect(generateSpy).not.toBeCalled();
+      });
+
       it("should return early and write choice to settings if user wants to never be asked again", async () => {
         showNeverAskAgainDialogSpy = jest
           .spyOn(dialog, "showNeverAskAgainDialog")