successfully compiles but vscode still does not support ESM extensions (see microsoft/vscode#130367)

Author: ArquintL

.eslintrc.js

@@ -146,7 +146,7 @@ module.exports = {
         "eol-last": "off",
         "eqeqeq": [
             "error",
-            "always"
+            "smart"
         ],
         "guard-for-in": "error",
         "id-denylist": "error",

package-lock.json

@@ -2,7 +2,8 @@
   "name": "vs-verification-toolbox",
   "version": "1.0.0",
   "description": "Useful component to build VS Code extensions for verifiers.",
-  "main": "out/index.js",
+  "type": "module",
+  "exports": "./out/index.js",
   "activationEvents": [
     "this property is required to run vs code tests"
   ],
@@ -25,15 +26,17 @@
     "npm",
     "node"
   ],
-  "author": "Julian Dunskus",
+  "author": {
+    "name": "Chair of Programming Methodology, ETH Zurich"
+  },
   "license": "MPL-2.0",
   "bugs": {
     "url": "https://github.com/viperproject/vs-verification-toolbox/issues"
   },
   "homepage": "https://github.com/viperproject/vs-verification-toolbox#readme",
   "engines": {
     "vscode": "^1.43.0",
-    "node": "*"
+    "node": ">=18"
   },
   "devDependencies": {
     "@types/fs-extra": "^11.0.4",
@@ -61,6 +64,6 @@
     "@octokit/rest": "^20.0.2",
     "extract-zip": "^2.0.0",
     "fs-extra": "^11.2.0",
-    "got": "^11.8.6"
+    "got": "^14.4.4"
   }
 }

package.json

@@ -1,7 +1,7 @@
 import * as path from 'path';
 
-import { ConfirmResult, InstallResult, Success } from './';
-import { Location, ProgressListener } from '../util';
+import { ConfirmResult, InstallResult, Success } from './index.js';
+import { Location, ProgressListener } from '../util/index.js';
 
 /**
  * Manages the installation for a dependency, maintaining separate installations for each source (in a folder using their name).

src/dependencies/Dependency.ts

@@ -1,11 +1,11 @@
 import * as fs from 'fs-extra';
-import * as path from 'path';
+import * as path from 'node:path';
 import got, { Headers, Options, Progress } from 'got';
 import * as stream from 'stream';
 import { promisify } from 'util';
 
-import { Canceled, ConfirmResult, DependencyInstaller, InstallResult, Success } from './';
-import { Location, ProgressListener } from '../util';
+import { Canceled, ConfirmResult, DependencyInstaller, InstallResult, Success } from './index.js';
+import { Location, ProgressListener } from '../util/index.js';
 
 
 const pipeline = promisify(stream.pipeline);

src/dependencies/FileDownloader.ts

@@ -28,10 +28,10 @@ export class GitHubReleaseAsset {
             // get the first release which corresponds to the latest pre- or non-pre-release.
             // note that draft releases do not show up for unauthenticated users
             // see https://octokit.github.io/rest.js/v18#repos-list-releases
-            let listReleasesParams: RestEndpointMethodTypes["repos"]["listReleases"]["parameters"] = {
-                owner: owner,
-                repo: repo,
-            }
+            const listReleasesParams: RestEndpointMethodTypes["repos"]["listReleases"]["parameters"] = {
+                owner,
+                repo,
+            };
             if (token == null) {
                 listReleasesParams.per_page = 1;
                 listReleasesParams.page = 1;
@@ -88,7 +88,7 @@ export class GitHubReleaseAsset {
      * @param token personal access token, OAuth token, installation access token, or JSON Web Token for GitHub App authentication
      */
     private static buildOctokit(token?: string): Octokit {
-        if (token) {
+        if (token != null) {
             return new Octokit({
                 auth: token,
             });

src/dependencies/GitHubReleaseAsset.ts

@@ -1,12 +1,10 @@
-import * as path from 'path';
-
-import { ConfirmResult, DependencyInstaller, FileDownloader, InstallerSequence, InstallResult, Success, ZipExtractor } from './';
-import { Location, ProgressListener } from '../util';
+import { ConfirmResult, DependencyInstaller, FileDownloader, InstallerSequence, InstallResult, Success, ZipExtractor } from './index.js';
+import { Location, ProgressListener } from '../util/index.js';
 
 /**
  * Extension of RemoteZipExtractor with the following features:
  * - no remote URL needed at construction time: a (potentially expensive) computation of the remote URL is only 
- *   performed when a download will actually take place.
+ * performed when a download will actually take place.
  * - the correct header for downloading a GitHub release asset is set
  * - if a GitHub token is provided it is used to perform the download as an authenticated user
  */
@@ -32,8 +30,8 @@ export class GitHubZipExtractor implements DependencyInstaller {
             const downloadHeaders: Record<string, string | string[] | undefined> = {
                 "Accept": "application/octet-stream"
             };
-            if (this.token) {
-                downloadHeaders["Authorization"] = `token ${this.token}`;
+            if (this.token != null) {
+                downloadHeaders.Authorization = `token ${this.token}`;
             }
 
             // lazily initialize sequence:

src/dependencies/GitHubZipExtractor.ts

@@ -1,3 +1,4 @@
+/* eslint-disable no-underscore-dangle */
 export interface InstallResult<T> {
 	isSuccess(): boolean;
 }
@@ -7,8 +8,8 @@ export class Success<T> implements InstallResult<T> {
 	private readonly _value: T;
 
 	/**
- 	 * @param t non-null
- 	 */
+	 * @param t non-null
+	 */
 	constructor(t: T) {
 		if (t == null) {
 			throw new Error(`Invalid argument: Success(v) can only be constructed with a non-null value`);

src/dependencies/InstallResult.ts

@@ -1,5 +1,5 @@
-import { ConfirmResult, DependencyInstaller, InstallResult, Success } from './';
-import { Location, ProgressListener } from '../util';
+import { ConfirmResult, DependencyInstaller, InstallResult, Success } from './index.js';
+import { Location, ProgressListener } from '../util/index.js';
 
 export class InstallerSequence {
 	constructor(readonly installers: DependencyInstaller[]) {
@@ -16,17 +16,17 @@ export class InstallerSequence {
 
 	public async install(location: Location, shouldUpdate: boolean, progressListener: ProgressListener, confirm:() => Promise<ConfirmResult>): Promise<InstallResult<Location>> {
 		let index = 0;
-		let firstConfirmPromise: Promise<ConfirmResult> | undefined = undefined;
+		let firstConfirmPromise: Promise<ConfirmResult> | undefined;
 		let result: InstallResult<Location> = new Success(location);
 		const total = this.installers.length;
 		for (const installer of this.installers) {
-			function intermediateListener(fraction: number, message: string) {
+			const intermediateListener = (fraction: number, message: string) => {
 				progressListener(
 					(index + fraction) / total,
 					`${message} (step ${index + 1} of ${total})`
 				);
-			}
-			function intermediateConfirm(): Promise<ConfirmResult> {
+			};
+			const intermediateConfirm = () => {
 				// only ask once
 				if (firstConfirmPromise == null) {
 					firstConfirmPromise = confirm();
@@ -35,7 +35,7 @@ export class InstallerSequence {
 					// return same promise:
 					return firstConfirmPromise;
 				}
-			}
+			};
 
 			if (result instanceof Success) {
 				// continue with next installer

src/dependencies/InstallerSequence.ts

@@ -1,7 +1,7 @@
 import * as fs from 'fs-extra';
 
-import { ConfirmResult, DependencyInstaller, InstallResult, Success } from './';
-import { Location, ProgressListener } from '../util';
+import { ConfirmResult, DependencyInstaller, InstallResult, Success } from './index.js';
+import { Location, ProgressListener } from '../util/index.js';
 
 export class LocalReference implements DependencyInstaller {
 	constructor(