feat: implement system channels for chrome in browsers (#9844)

packages/browsers/src/CLI.ts

@@ -19,10 +19,18 @@ import yargs from 'yargs';
 import {hideBin} from 'yargs/helpers';
 
 import {resolveBuildId} from './browsers/browsers.js';
-import {Browser, BrowserPlatform} from './browsers/types.js';
+import {
+  Browser,
+  BrowserPlatform,
+  ChromeReleaseChannel,
+} from './browsers/types.js';
 import {detectBrowserPlatform} from './detectPlatform.js';
 import {fetch} from './fetch.js';
-import {computeExecutablePath, launch} from './launcher.js';
+import {
+  computeExecutablePath,
+  computeSystemExecutablePath,
+  launch,
+} from './launcher.js';
 
 type InstallArgs = {
   browser: {
@@ -41,6 +49,7 @@ type LaunchArgs = {
   path?: string;
   platform?: BrowserPlatform;
   detached: boolean;
+  system: boolean;
 };
 
 export class CLI {
@@ -132,13 +141,25 @@ export class CLI {
           this.#definePathParameter(yargs);
           yargs.option('detached', {
             type: 'boolean',
-            desc: 'Whether to detach the child process.',
+            desc: 'Detach the child process.',
+            default: false,
+          });
+          yargs.option('system', {
+            type: 'boolean',
+            desc: 'Search for a browser installed on the system instead of the cache folder.',
             default: false,
           });
         },
         async argv => {
           const args = argv as unknown as LaunchArgs;
-          const executablePath = computeExecutablePath({
+          const executablePath = args.system
+            ? computeSystemExecutablePath({
+                browser: args.browser.name,
+                // TODO: throw an error if not a ChromeReleaseChannel is provided.
+                channel: args.browser.buildId as ChromeReleaseChannel,
+                platform: args.platform,
+              })
+            : computeExecutablePath({
                 browser: args.browser.name,
                 buildId: args.browser.buildId,
                 cacheDir: args.path ?? this.#cachePath,

packages/browsers/src/browsers/browsers.ts

@@ -16,7 +16,13 @@
 
 import * as chrome from './chrome.js';
 import * as firefox from './firefox.js';
-import {Browser, BrowserPlatform, BrowserTag, ProfileOptions} from './types.js';
+import {
+  Browser,
+  BrowserPlatform,
+  BrowserTag,
+  ChromeReleaseChannel,
+  ProfileOptions,
+} from './types.js';
 
 export const downloadUrls = {
   [Browser.CHROME]: chrome.resolveDownloadUrl,
@@ -66,3 +72,19 @@ export async function createProfile(
       throw new Error(`Profile creation is not support for ${browser} yet`);
   }
 }
+
+export function resolveSystemExecutablePath(
+  browser: Browser,
+  platform: BrowserPlatform,
+  channel: ChromeReleaseChannel
+): string {
+  switch (browser) {
+    case Browser.FIREFOX:
+      throw new Error(
+        'System browser detection is not supported for Firefox yet.'
+      );
+    case Browser.CHROME:
+    case Browser.CHROMIUM:
+      return chrome.resolveSystemExecutablePath(platform, channel);
+  }
+}

packages/browsers/src/browsers/chrome.ts

@@ -18,7 +18,7 @@ import path from 'path';
 
 import {httpRequest} from '../httpUtil.js';
 
-import {BrowserPlatform} from './types.js';
+import {BrowserPlatform, ChromeReleaseChannel} from './types.js';
 
 function archive(platform: BrowserPlatform, buildId: string): string {
   switch (platform) {
@@ -81,7 +81,6 @@ export function relativeExecutablePath(
       return path.join('chrome-win', 'chrome.exe');
   }
 }
-
 export async function resolveBuildId(
   platform: BrowserPlatform,
   // We will need it for other channels/keywords.
@@ -118,3 +117,48 @@ export async function resolveBuildId(
     });
   });
 }
+
+export function resolveSystemExecutablePath(
+  platform: BrowserPlatform,
+  channel: ChromeReleaseChannel
+): string {
+  switch (platform) {
+    case BrowserPlatform.WIN64:
+    case BrowserPlatform.WIN32:
+      switch (channel) {
+        case ChromeReleaseChannel.STABLE:
+          return `${process.env['PROGRAMFILES']}\\Google\\Chrome\\Application\\chrome.exe`;
+        case ChromeReleaseChannel.BETA:
+          return `${process.env['PROGRAMFILES']}\\Google\\Chrome Beta\\Application\\chrome.exe`;
+        case ChromeReleaseChannel.CANARY:
+          return `${process.env['PROGRAMFILES']}\\Google\\Chrome SxS\\Application\\chrome.exe`;
+        case ChromeReleaseChannel.DEV:
+          return `${process.env['PROGRAMFILES']}\\Google\\Chrome Dev\\Application\\chrome.exe`;
+      }
+    case BrowserPlatform.MAC_ARM:
+    case BrowserPlatform.MAC:
+      switch (channel) {
+        case ChromeReleaseChannel.STABLE:
+          return '/Applications/Google Chrome.app/Contents/MacOS/Google Chrome';
+        case ChromeReleaseChannel.BETA:
+          return '/Applications/Google Chrome Beta.app/Contents/MacOS/Google Chrome Beta';
+        case ChromeReleaseChannel.CANARY:
+          return '/Applications/Google Chrome Canary.app/Contents/MacOS/Google Chrome Canary';
+        case ChromeReleaseChannel.DEV:
+          return '/Applications/Google Chrome Dev.app/Contents/MacOS/Google Chrome Dev';
+      }
+    case BrowserPlatform.LINUX:
+      switch (channel) {
+        case ChromeReleaseChannel.STABLE:
+          return '/opt/google/chrome/chrome';
+        case ChromeReleaseChannel.BETA:
+          return '/opt/google/chrome-beta/chrome';
+        case ChromeReleaseChannel.DEV:
+          return '/opt/google/chrome-unstable/chrome';
+      }
+  }
+
+  throw new Error(
+    `Unable to detect browser executable path for '${channel}' on ${platform}.`
+  );
+}

packages/browsers/src/browsers/types.ts

@@ -52,3 +52,10 @@ export interface ProfileOptions {
   preferences: Record<string, unknown>;
   path: string;
 }
+
+export enum ChromeReleaseChannel {
+  STABLE = 'stable',
+  DEV = 'dev',
+  CANARY = 'canary',
+  BETA = 'beta',
+}

packages/browsers/src/launcher.ts

@@ -15,6 +15,7 @@
  */
 
 import childProcess from 'child_process';
+import {accessSync} from 'fs';
 import os from 'os';
 import path from 'path';
 import readline from 'readline';
@@ -23,7 +24,9 @@ import {
   Browser,
   BrowserPlatform,
   executablePathByBrowser,
+  resolveSystemExecutablePath,
 } from './browsers/browsers.js';
+import {ChromeReleaseChannel} from './browsers/types.js';
 import {CacheStructure} from './CacheStructure.js';
 import {debug} from './debug.js';
 import {detectBrowserPlatform} from './detectPlatform.js';
@@ -49,7 +52,7 @@ export interface Options {
    */
   browser: Browser;
   /**
-   * Determines which buildId to dowloand. BuildId should uniquely identify
+   * Determines which buildId to download. BuildId should uniquely identify
    * binaries and they are used for caching.
    */
   buildId: string;
@@ -73,6 +76,47 @@ export function computeExecutablePath(options: Options): string {
   );
 }
 
+/**
+ * @public
+ */
+export interface SystemOptions {
+  /**
+   * Determines which platform the browser will be suited for.
+   *
+   * @defaultValue Auto-detected.
+   */
+  platform?: BrowserPlatform;
+  /**
+   * Determines which browser to fetch.
+   */
+  browser: Browser;
+  /**
+   * Release channel to look for on the system.
+   */
+  channel: ChromeReleaseChannel;
+}
+export function computeSystemExecutablePath(options: SystemOptions): string {
+  options.platform ??= detectBrowserPlatform();
+  if (!options.platform) {
+    throw new Error(
+      `Cannot download a binary for the provided platform: ${os.platform()} (${os.arch()})`
+    );
+  }
+  const path = resolveSystemExecutablePath(
+    options.browser,
+    options.platform,
+    options.channel
+  );
+  try {
+    accessSync(path);
+  } catch (error) {
+    throw new Error(
+      `Could not find Google Chrome executable for channel '${options.channel}' at '${path}'.`
+    );
+  }
+  return path;
+}
+
 type LaunchOptions = {
   executablePath: string;
   pipe?: boolean;

packages/browsers/src/main.ts

@@ -0,0 +1,26 @@
+/**
+ * Copyright 2023 Google Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+export {
+  launch,
+  computeExecutablePath,
+  computeSystemExecutablePath,
+  CDP_WEBSOCKET_ENDPOINT_REGEX,
+  WEBDRIVER_BIDI_WEBSOCKET_ENDPOINT_REGEX,
+} from './launcher.js';
+export {fetch, canFetch} from './fetch.js';
+export {detectBrowserPlatform} from './detectPlatform.js';
+export {Browser, BrowserPlatform} from './browsers/browsers.js';

packages/browsers/test/src/chrome-data.spec.ts

@@ -21,7 +21,9 @@ import {BrowserPlatform} from '../../lib/cjs/browsers/browsers.js';
 import {
   resolveDownloadUrl,
   relativeExecutablePath,
+  resolveSystemExecutablePath,
 } from '../../lib/cjs/browsers/chrome.js';
+import {ChromeReleaseChannel} from '../../lib/cjs/browsers/types.js';
 
 describe('Chrome', () => {
   it('should resolve download URLs', () => {
@@ -69,4 +71,36 @@ describe('Chrome', () => {
       path.join('chrome-win', 'chrome.exe')
     );
   });
+
+  it('should resolve system executable path', () => {
+    process.env['PROGRAMFILES'] = 'C:\\ProgramFiles';
+    try {
+      assert.strictEqual(
+        resolveSystemExecutablePath(
+          BrowserPlatform.WIN32,
+          ChromeReleaseChannel.DEV
+        ),
+        'C:\\ProgramFiles\\Google\\Chrome Dev\\Application\\chrome.exe'
+      );
+    } finally {
+      delete process.env['PROGRAMFILES'];
+    }
+
+    assert.strictEqual(
+      resolveSystemExecutablePath(
+        BrowserPlatform.MAC,
+        ChromeReleaseChannel.BETA
+      ),
+      '/Applications/Google Chrome Beta.app/Contents/MacOS/Google Chrome Beta'
+    );
+    assert.throws(() => {
+      assert.strictEqual(
+        resolveSystemExecutablePath(
+          BrowserPlatform.LINUX,
+          ChromeReleaseChannel.CANARY
+        ),
+        path.join('chrome-linux', 'chrome')
+      );
+    }, new Error(`Unable to detect browser executable path for 'canary' on linux.`));
+  });
 });

packages/browsers/test/src/fetch.spec.ts

@@ -92,7 +92,7 @@ describe('fetch', () => {
   });
 
   it('should download a buildId that is a bzip2 archive', async function () {
-    this.timeout(60000);
+    this.timeout(90000);
     const expectedOutputPath = path.join(
       tmpDir,
       'firefox',