Switch Octokit to use node-fetch

It seems like Node's native `fetch` implementation isn't quite working
right with Octokit and MSW. This switches to using `node-fetch` like
we're already doing for all other requests (e.g. downloading databases).

extensions/ql-vscode/src/common/octokit.ts

@@ -0,0 +1,10 @@
+import * as Octokit from "@octokit/rest";
+import { retry } from "@octokit/plugin-retry";
+import fetch from "node-fetch";
+
+export const AppOctokit = Octokit.Octokit.defaults({
+  request: {
+    fetch,
+  },
+  retry,
+});

extensions/ql-vscode/src/common/vscode/authentication.ts

@@ -1,7 +1,7 @@
 import * as vscode from "vscode";
 import * as Octokit from "@octokit/rest";
-import { retry } from "@octokit/plugin-retry";
 import { Credentials } from "../authentication";
+import { AppOctokit } from "../octokit";
 
 export const GITHUB_AUTH_PROVIDER_ID = "github";
 
@@ -32,9 +32,8 @@ export class VSCodeCredentials implements Credentials {
 
     const accessToken = await this.getAccessToken();
 
-    return new Octokit.Octokit({
+    return new AppOctokit({
       auth: accessToken,
-      retry,
     });
   }
 

extensions/ql-vscode/src/databases/code-search-api.ts

@@ -1,9 +1,9 @@
-import { retry } from "@octokit/plugin-retry";
 import { throttling } from "@octokit/plugin-throttling";
 import { Octokit } from "@octokit/rest";
 import { Progress, CancellationToken } from "vscode";
 import { Credentials } from "../common/authentication";
 import { BaseLogger } from "../common/logging";
+import { AppOctokit } from "../common/octokit";
 
 export async function getCodeSearchRepositories(
   query: string,
@@ -46,12 +46,11 @@ async function provideOctokitWithThrottling(
   credentials: Credentials,
   logger: BaseLogger,
 ): Promise<Octokit> {
-  const MyOctokit = Octokit.plugin(throttling);
+  const MyOctokit = AppOctokit.plugin(throttling);
   const auth = await credentials.getAccessToken();
 
   const octokit = new MyOctokit({
     auth,
-    retry,
     throttle: {
       onRateLimit: (retryAfter: number, options: any): boolean => {
         void logger.log(

extensions/ql-vscode/src/databases/database-fetcher.ts

@@ -14,7 +14,6 @@ import {
 } from "fs-extra";
 import { basename, join } from "path";
 import * as Octokit from "@octokit/rest";
-import { retry } from "@octokit/plugin-retry";
 
 import { DatabaseManager, DatabaseItem } from "./local-databases";
 import { tmpDir } from "../tmp-dir";
@@ -32,6 +31,7 @@ import { Credentials } from "../common/authentication";
 import { AppCommandManager } from "../common/commands";
 import { allowHttp } from "../config";
 import { showAndLogInformationMessage } from "../common/logging";
+import { AppOctokit } from "../common/octokit";
 
 /**
  * Prompts a user to fetch a database from a remote location. Database is assumed to be an archive file.
@@ -186,7 +186,7 @@ export async function downloadGitHubDatabase(
 
   const octokit = credentials
     ? await credentials.getOctokit()
-    : new Octokit.Octokit({ retry });
+    : new AppOctokit();
 
   const result = await convertGithubNwoToDatabaseUrl(
     nwo,