fix(browsers): various fixes and improvements (#9966)

packages/browsers/package.json

@@ -20,7 +20,7 @@
   },
   "wireit": {
     "build": {
-      "command": "tsc -b && chmod a+x lib/cjs/main-cli.js lib/esm/main-cli.js",
+      "command": "tsc -b && chmod a+x lib/cjs/main-cli.js lib/esm/main-cli.js && echo '{\"type\":\"module\"}' > lib/esm/package.json",
       "files": [
         "src/**/*.ts",
         "tsconfig.json"

packages/browsers/src/CLI.ts

@@ -18,8 +18,9 @@ import {stdin as input, stdout as output} from 'process';
 import * as readline from 'readline';
 
 import ProgressBar from 'progress';
-import yargs from 'yargs';
+import type * as Yargs from 'yargs';
 import {hideBin} from 'yargs/helpers';
+import yargs from 'yargs/yargs';
 
 import {
   resolveBuildId,
@@ -69,7 +70,7 @@ export class CLI {
     this.#rl = rl;
   }
 
-  #defineBrowserParameter(yargs: yargs.Argv<unknown>): void {
+  #defineBrowserParameter(yargs: Yargs.Argv<unknown>): void {
     yargs.positional('browser', {
       description:
         'Which browser to install <browser>[@<buildId|latest>]. `latest` will try to find the latest available build. `buildId` is a browser-specific identifier such as a version or a revision.',
@@ -83,7 +84,7 @@ export class CLI {
     });
   }
 
-  #definePlatformParameter(yargs: yargs.Argv<unknown>): void {
+  #definePlatformParameter(yargs: Yargs.Argv<unknown>): void {
     yargs.option('platform', {
       type: 'string',
       desc: 'Platform that the binary needs to be compatible with.',
@@ -92,7 +93,7 @@ export class CLI {
     });
   }
 
-  #definePathParameter(yargs: yargs.Argv<unknown>, required = false): void {
+  #definePathParameter(yargs: Yargs.Argv<unknown>, required = false): void {
     yargs.option('path', {
       type: 'string',
       desc: 'Path to the root folder for the browser downloads and installation. The installation folder structure is compatible with the cache structure used by Puppeteer.',
@@ -105,7 +106,8 @@ export class CLI {
   }
 
   async run(argv: string[]): Promise<void> {
-    await yargs(hideBin(argv))
+    const yargsInstance = yargs(hideBin(argv));
+    await yargsInstance
       .scriptName('@puppeteer/browsers')
       .command(
         'install <browser>',
@@ -254,7 +256,7 @@ export class CLI {
       )
       .demandCommand(1)
       .help()
-      .wrap(Math.min(120, yargs.terminalWidth()))
+      .wrap(Math.min(120, yargsInstance.terminalWidth()))
       .parse();
   }
 

packages/browsers/src/launcher.ts

@@ -122,11 +122,12 @@ type LaunchOptions = {
   pipe?: boolean;
   dumpio?: boolean;
   args?: string[];
-  env?: Record<string, string>;
+  env?: Record<string, string | undefined>;
   handleSIGINT?: boolean;
   handleSIGTERM?: boolean;
   handleSIGHUP?: boolean;
   detached?: boolean;
+  onExit?: () => Promise<void>;
 };
 
 export function launch(opts: LaunchOptions): Process {
@@ -143,6 +144,11 @@ class Process {
   #args: string[];
   #browserProcess: childProcess.ChildProcess;
   #exited = false;
+  // The browser process can be closed externally or from the driver process. We
+  // need to invoke the hooks only once though but we don't know how many times
+  // we will be invoked.
+  #hooksRan = false;
+  #onExitHook = async () => {};
   #browserProcessExiting: Promise<void>;
 
   constructor(opts: LaunchOptions) {
@@ -190,15 +196,36 @@ class Process {
     if (opts.handleSIGHUP) {
       process.on('SIGHUP', this.#onDriverProcessSignal);
     }
-    this.#browserProcessExiting = new Promise(resolve => {
+    if (opts.onExit) {
-      this.#browserProcess.once('exit', () => {
+      this.#onExitHook = opts.onExit;
-        this.#exited = true;
+    }
+    this.#browserProcessExiting = new Promise((resolve, reject) => {
+      this.#browserProcess.once('exit', async () => {
         this.#clearListeners();
+        this.#exited = true;
+        try {
+          await this.#runHooks();
+        } catch (err) {
+          reject(err);
+          return;
+        }
         resolve();
       });
     });
   }
 
+  async #runHooks() {
+    if (this.#hooksRan) {
+      return;
+    }
+    this.#hooksRan = true;
+    await this.#onExitHook();
+  }
+
+  get nodeProcess(): childProcess.ChildProcess {
+    return this.#browserProcess;
+  }
+
   #configureStdio(opts: {
     pipe: boolean;
     dumpio: boolean;
@@ -236,19 +263,24 @@ class Process {
         process.exit(130);
       case 'SIGTERM':
       case 'SIGHUP':
-        this.kill();
+        this.close();
         break;
     }
   };
 
-  close(): Promise<void> {
+  async close(): Promise<void> {
+    await this.#runHooks();
     if (this.#exited) {
-      return Promise.resolve();
+      return this.#browserProcessExiting;
     }
     this.kill();
     return this.#browserProcessExiting;
   }
 
+  hasClosed(): Promise<void> {
+    return this.#browserProcessExiting;
+  }
+
   kill(): void {
     // If the process failed to launch (for example if the browser executable path
     // is invalid), then the process does not get a pid assigned. A call to
@@ -329,6 +361,9 @@ class Process {
                 error ? ' ' + error.message : ''
               }`,
               stderr,
+              '',
+              'TROUBLESHOOTING: https://pptr.dev/troubleshooting',
+              '',
             ].join('\n')
           )
         );
@@ -337,7 +372,7 @@ class Process {
       function onTimeout(): void {
         cleanup();
         reject(
-          new Error(
+          new TimeoutError(
             `Timed out after ${timeout} ms while waiting for the WS endpoint URL to appear in stdout!`
           )
         );
@@ -403,3 +438,14 @@ export function isErrnoException(obj: unknown): obj is NodeJS.ErrnoException {
     ('errno' in obj || 'code' in obj || 'path' in obj || 'syscall' in obj)
   );
 }
+
+export class TimeoutError extends Error {
+  /**
+   * @internal
+   */
+  constructor(message?: string) {
+    super(message);
+    this.name = this.constructor.name;
+    Error.captureStackTrace(this, this.constructor);
+  }
+}

packages/browsers/src/main.ts

@@ -18,6 +18,7 @@ export {
   launch,
   computeExecutablePath,
   computeSystemExecutablePath,
+  TimeoutError,
   CDP_WEBSOCKET_ENDPOINT_REGEX,
   WEBDRIVER_BIDI_WEBSOCKET_ENDPOINT_REGEX,
 } from './launcher.js';
@@ -28,6 +29,7 @@ export {
   Browser,
   BrowserPlatform,
   ChromeReleaseChannel,
+  createProfile,
 } from './browser-data/browser-data.js';
 export {CLI, makeProgressCallback} from './CLI.js';
 export {Cache} from './Cache.js';