Exclude workspace folders in the system temp dir

extensions/ql-vscode/src/data-extensions-editor/extensions-workspace-folder.ts

@@ -1,6 +1,7 @@
 import { Uri, window, workspace, WorkspaceFolder } from "vscode";
 import { getOnDiskWorkspaceFoldersObjects } from "../common/vscode/workspace-folders";
 import { extLogger } from "../common";
+import { tmpdir } from "../pure/files";
 
 /**
  * Returns the ancestors of this path in order from furthest to closest (i.e. root of filesystem to parent directory)
@@ -26,7 +27,15 @@ function getRootWorkspaceDirectory(): Uri | undefined {
     return Uri.joinPath(workspaceFile, "..");
   }
 
-  const workspaceFolders = getOnDiskWorkspaceFoldersObjects();
+  const allWorkspaceFolders = getOnDiskWorkspaceFoldersObjects();
+
+  // Get the system temp directory and convert it to a URI so it's normalized
+  const systemTmpdir = Uri.file(tmpdir());
+
+  const workspaceFolders = allWorkspaceFolders.filter((folder) => {
+    // Never use a workspace folder that is in the system temp directory
+    return !folder.uri.fsPath.startsWith(systemTmpdir.fsPath);
+  });
 
   // Find the common root directory of all workspace folders by finding the longest common prefix
   const commonRoot = workspaceFolders.reduce((commonRoot, folder) => {

extensions/ql-vscode/src/pure/files.ts

@@ -1,5 +1,6 @@
 import { pathExists, stat, readdir, opendir } from "fs-extra";
 import { isAbsolute, join, relative, resolve } from "path";
+import { tmpdir as osTmpdir } from "os";
 
 /**
  * Recursively finds all .ql files in this set of Uris.
@@ -121,3 +122,8 @@ export interface IOError {
 export function isIOError(e: any): e is IOError {
   return e.code !== undefined && typeof e.code === "string";
 }
+
+// This function is a wrapper around `os.tmpdir()` to make it easier to mock in tests.
+export function tmpdir(): string {
+  return osTmpdir();
+}

extensions/ql-vscode/test/vscode-tests/no-workspace/data-extensions-editor/extensions-workspace-folder.test.ts

@@ -1,6 +1,8 @@
 import { Uri, workspace, WorkspaceFolder } from "vscode";
 import { dir, DirectoryResult } from "tmp-promise";
+import { join } from "path";
 import { autoPickExtensionsDirectory } from "../../../../src/data-extensions-editor/extensions-workspace-folder";
+import * as files from "../../../../src/pure/files";
 
 describe("autoPickExtensionsDirectory", () => {
   let tmpDir: DirectoryResult;
@@ -15,13 +17,14 @@ describe("autoPickExtensionsDirectory", () => {
   let updateWorkspaceFoldersSpy: jest.SpiedFunction<
     typeof workspace.updateWorkspaceFolders
   >;
+  let mockedTmpDirUri: Uri;
 
   beforeEach(async () => {
     tmpDir = await dir({
       unsafeCleanup: true,
     });
 
-    rootDirectory = Uri.file(tmpDir.path);
+    rootDirectory = Uri.joinPath(Uri.file(tmpDir.path), "root");
     extensionsDirectory = Uri.joinPath(
       rootDirectory,
       ".github",
@@ -29,6 +32,9 @@ describe("autoPickExtensionsDirectory", () => {
       "extensions",
     );
 
+    const mockedTmpDir = join(tmpDir.path, ".tmp", "tmp");
+    mockedTmpDirUri = Uri.file(mockedTmpDir);
+
     workspaceFoldersSpy = jest
       .spyOn(workspace, "workspaceFolders", "get")
       .mockReturnValue([]);
@@ -38,6 +44,8 @@ describe("autoPickExtensionsDirectory", () => {
     updateWorkspaceFoldersSpy = jest
       .spyOn(workspace, "updateWorkspaceFolders")
       .mockReturnValue(true);
+
+    jest.spyOn(files, "tmpdir").mockReturnValue(mockedTmpDir);
   });
 
   afterEach(async () => {
@@ -136,6 +144,32 @@ describe("autoPickExtensionsDirectory", () => {
     });
   });
 
+  it("when a workspace file does not exist and there is a temp dir as workspace folder", async () => {
+    workspaceFoldersSpy.mockReturnValue([
+      {
+        uri: Uri.joinPath(rootDirectory, "codeql-custom-queries-java"),
+        name: "codeql-custom-queries-java",
+        index: 0,
+      },
+      {
+        uri: Uri.joinPath(rootDirectory, "codeql-custom-queries-python"),
+        name: "codeql-custom-queries-python",
+        index: 1,
+      },
+      {
+        uri: Uri.joinPath(mockedTmpDirUri, "quick-queries"),
+        name: "quick-queries",
+        index: 2,
+      },
+    ]);
+
+    expect(await autoPickExtensionsDirectory()).toEqual(extensionsDirectory);
+    expect(updateWorkspaceFoldersSpy).toHaveBeenCalledWith(3, 0, {
+      name: "CodeQL Extension Packs",
+      uri: extensionsDirectory,
+    });
+  });
+
   it("when a workspace file does not exist and there is no common root directory", async () => {
     workspaceFoldersSpy.mockReturnValue([
       {