feat[devtools]: ship source maps for content scripts and ignore list installHook script (#28730)

## Summary

1. RDT browser extension's content scripts will now ship source maps
(without source in prod, to save some bundle size).
2. `installHook` content script will be ignore listed via `ignoreList`
field in the corresponding source map.
3. Previously, source map for backend file used `x_google_ignoreList`
naming, now `ignoreList`.

## How did you test this change?

1. `ignoreList-test.js`
2. Tested manually that I don't see `installHook` in stack traces when
`console.error` is called.

packages/react-devtools-extensions/package.json

@@ -39,7 +39,6 @@
     "chrome-launch": "^1.1.4",
     "crx": "^5.0.0",
     "css-loader": "^1.0.1",
-    "devtools-ignore-webpack-plugin": "^0.1.1",
     "file-loader": "^6.1.0",
     "filesize": "^6.0.1",
     "find": "^0.3.0",

packages/react-devtools-extensions/src/__tests__/ignoreList-test.js

@@ -12,7 +12,7 @@ import {readFileSync} from 'fs';
 import path from 'path';
 import {rimrafSync} from 'rimraf';
 
-describe('x_google_ignoreList source map extension', () => {
+describe('ignoreList source map extension', () => {
   jest.setTimeout(60 * 1000);
 
   const pathToExtensionsPackage = path.resolve(__dirname, '..', '..');
@@ -30,7 +30,7 @@ describe('x_google_ignoreList source map extension', () => {
   });
 
   describe('for dev builds', () => {
-    it('should include only sources with /node_modules/ and /webpack/ in path', async () => {
+    it('should not ignore list anything', async () => {
       await exec('yarn build:chrome:local', {
         cwd: pathToExtensionsPackage,
       });
@@ -38,18 +38,8 @@ describe('x_google_ignoreList source map extension', () => {
       const sourceMapJSON = readFileSync(pathToSourceMap);
       const sourceMap = JSON.parse(sourceMapJSON);
 
-      const {sources, x_google_ignoreList} = sourceMap;
-
-      const expectedIgnoreList = [];
-      for (let sourceIndex = 0; sourceIndex < sources.length; ++sourceIndex) {
-        const source = sources[sourceIndex];
-
-        if (source.includes('/node_modules/') || source.includes('/webpack/')) {
-          expectedIgnoreList.push(sourceIndex);
-        }
-      }
-
-      expect(x_google_ignoreList).toEqual(expectedIgnoreList);
+      const {ignoreList} = sourceMap;
+      expect(ignoreList).toEqual([]);
     });
   });
 
@@ -60,9 +50,9 @@ describe('x_google_ignoreList source map extension', () => {
       const sourceMapJSON = readFileSync(pathToSourceMap);
       const sourceMap = JSON.parse(sourceMapJSON);
 
-      const {sources, x_google_ignoreList} = sourceMap;
+      const {sources, ignoreList} = sourceMap;
 
-      expect(sources.length).toBe(x_google_ignoreList.length);
+      expect(sources.length).toBe(ignoreList.length);
     });
   });
 });

packages/react-devtools-extensions/webpack.backend.js

@@ -2,9 +2,10 @@
 
 const {resolve} = require('path');
 const Webpack = require('webpack');
-const DevToolsIgnorePlugin = require('devtools-ignore-webpack-plugin');
 
 const {resolveFeatureFlags} = require('react-devtools-shared/buildUtils');
+const SourceMapIgnoreListPlugin = require('react-devtools-shared/SourceMapIgnoreListPlugin');
+
 const {
   DARK_MODE_DIMMED_WARNING_COLOR,
   DARK_MODE_DIMMED_ERROR_COLOR,
@@ -42,7 +43,7 @@ const featureFlagTarget = process.env.FEATURE_FLAG_TARGET || 'extension-oss';
 
 module.exports = {
   mode: __DEV__ ? 'development' : 'production',
-  devtool: __DEV__ ? 'cheap-module-source-map' : 'nosources-cheap-source-map',
+  devtool: false,
   entry: {
     backend: './src/backend.js',
   },
@@ -87,14 +88,12 @@ module.exports = {
       'process.env.IS_FIREFOX': IS_FIREFOX,
       'process.env.IS_EDGE': IS_EDGE,
     }),
-    new DevToolsIgnorePlugin({
-      shouldIgnorePath: function (path) {
-        if (!__DEV__) {
-          return true;
-        }
-
-        return path.includes('/node_modules/') || path.includes('/webpack/');
-      },
+    new Webpack.SourceMapDevToolPlugin({
+      filename: '[file].map',
+      noSources: !__DEV__,
+    }),
+    new SourceMapIgnoreListPlugin({
+      shouldIgnoreSource: () => !__DEV__,
     }),
   ],
   module: {

packages/react-devtools-extensions/webpack.config.js

@@ -14,6 +14,7 @@ const {
   getVersionString,
 } = require('./utils');
 const {resolveFeatureFlags} = require('react-devtools-shared/buildUtils');
+const SourceMapIgnoreListPlugin = require('react-devtools-shared/SourceMapIgnoreListPlugin');
 
 const NODE_ENV = process.env.NODE_ENV;
 if (!NODE_ENV) {
@@ -54,7 +55,7 @@ const babelOptions = {
 
 module.exports = {
   mode: __DEV__ ? 'development' : 'production',
-  devtool: __DEV__ ? 'cheap-module-source-map' : false,
+  devtool: false,
   entry: {
     background: './src/background/index.js',
     backendManager: './src/contentScripts/backendManager.js',
@@ -134,6 +135,27 @@ module.exports = {
       'process.env.LIGHT_MODE_DIMMED_ERROR_COLOR': `"${LIGHT_MODE_DIMMED_ERROR_COLOR}"`,
       'process.env.LIGHT_MODE_DIMMED_LOG_COLOR': `"${LIGHT_MODE_DIMMED_LOG_COLOR}"`,
     }),
+    new Webpack.SourceMapDevToolPlugin({
+      filename: '[file].map',
+      noSources: !__DEV__,
+    }),
+    new SourceMapIgnoreListPlugin({
+      shouldIgnoreSource: (assetName, _source) => {
+        if (__DEV__) {
+          // Don't ignore list anything in DEV build for debugging purposes
+          return false;
+        }
+
+        const contentScriptNamesToIgnoreList = [
+          // This is where we override console
+          'installHook',
+        ];
+
+        return contentScriptNamesToIgnoreList.some(ignoreListName =>
+          assetName.startsWith(ignoreListName),
+        );
+      },
+    }),
   ],
   module: {
     defaultRules: [

packages/react-devtools-shared/SourceMapIgnoreListPlugin.js

@@ -0,0 +1,73 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+/**
+ * The implementation of this plugin is based on similar webpack plugin in Angular CLI
+ * https://github.com/angular/angular-cli/blob/16d8c552e99bfe65ded9e843e917dbb95eb8ec01/packages/angular_devkit/build_angular/src/tools/webpack/plugins/devtools-ignore-plugin.ts
+ * and devtools-ignore-webpack-plugin
+ * https://github.com/mondaychen/devtools-ignore-webpack-plugin/blob/d15274e4d2fdb74f73aa644f14773a5523823999/src/index.ts
+ * which both are licensed under MIT
+ */
+
+const {Compilation} = require('webpack');
+
+const IGNORE_LIST = 'ignoreList';
+const PLUGIN_NAME = 'source-map-ignore-list-plugin';
+
+class SourceMapIgnoreListPlugin {
+  constructor({shouldIgnoreSource}) {
+    this.shouldIgnoreSource = shouldIgnoreSource;
+  }
+
+  apply(compiler) {
+    const {RawSource} = compiler.webpack.sources;
+
+    compiler.hooks.compilation.tap(PLUGIN_NAME, compilation => {
+      compilation.hooks.processAssets.tap(
+        {
+          name: PLUGIN_NAME,
+          stage: Compilation.PROCESS_ASSETS_STAGE_DEV_TOOLING,
+          additionalAssets: true,
+        },
+        assets => {
+          // eslint-disable-next-line no-for-of-loops/no-for-of-loops
+          for (const [name, asset] of Object.entries(assets)) {
+            if (!name.endsWith('.map')) {
+              continue;
+            }
+
+            const mapContent = asset.source().toString();
+            if (!mapContent) {
+              continue;
+            }
+
+            const map = JSON.parse(mapContent);
+            const ignoreList = [];
+
+            const sourcesCount = map.sources.length;
+            for (
+              let potentialSourceIndex = 0;
+              potentialSourceIndex < sourcesCount;
+              ++potentialSourceIndex
+            ) {
+              const source = map.sources[potentialSourceIndex];
+
+              if (this.shouldIgnoreSource(name, source)) {
+                ignoreList.push(potentialSourceIndex);
+              }
+            }
+
+            map[IGNORE_LIST] = ignoreList;
+            compilation.updateAsset(name, new RawSource(JSON.stringify(map)));
+          }
+        },
+      );
+    });
+  }
+}
+
+module.exports = SourceMapIgnoreListPlugin;

yarn.lock

@@ -6417,11 +6417,6 @@ detect-node@^2.0.4:
   resolved "https://registry.yarnpkg.com/detect-node/-/detect-node-2.0.4.tgz#014ee8f8f669c5c58023da64b8179c083a28c46c"
   integrity sha512-ZIzRpLJrOj7jjP2miAtgqIfmzbxa4ZOr5jJc601zklsfEx9oTzmmj2nVpIPRpNlRTIh8lc1kyViIY7BWSGNmKw==
 
-devtools-ignore-webpack-plugin@^0.1.1:
-  version "0.1.1"
-  resolved "https://registry.yarnpkg.com/devtools-ignore-webpack-plugin/-/devtools-ignore-webpack-plugin-0.1.1.tgz#8f4fcf83019bc361e8a3cf7b7d466a33693de14e"
-  integrity sha512-pJ/NGZTQxK1VDoyy8fLm0UV3ugOanostztLKUmzqYnUIKqyUm2ZkIpon6No0gWlpOSMoSpBWTnzrx1cdsbpuyw==
-
 diff-sequences@^27.0.6:
   version "27.0.6"
   resolved "https://registry.yarnpkg.com/diff-sequences/-/diff-sequences-27.0.6.tgz#3305cb2e55a033924054695cc66019fd7f8e5723"