Bug 1881701 - Move ESLint ignores and test paths to be module files as well. r=frontend-codestyle-reviewers,devtools-reviewers,Gijs,nchevobbe

This completes the moving of all the top-level configuration files to be ES modules, and named similarily.

Differential Revision: https://phabricator.services.mozilla.com/D250403

.prettierignore

@@ -987,8 +987,8 @@ tools/jprof/README.html
 uriloader/exthandler/tests/mochitest/save_filenames.html
 
 ##############################################################################
-# The list below is copied from .eslintrc-ignores.js. Prettier doesn't currently
-# support multiple ignore files or dynamic ignore configurations.
+# The list below is copied from eslint-ignores.config.mjs. Prettier doesn't
+# currently support multiple ignore files or dynamic ignore configurations.
 # When this is implemented, we'll update the configuration below (bug 1825508)
 ##############################################################################
 

devtools/docs/contributor/contributing/eslint.md

@@ -80,7 +80,7 @@ You should see errors and warnings in the gutter as shown in the screenshot belo
       (when (string-match "^\\([a-z]+_\\)" base)
 	(setq-local flycheck-temp-prefix (match-string 1 base))))
     (let ((base-dir (locate-dominating-file (buffer-file-name)
-					    ".eslintrc-ignores.js")))
+					    "eslint-ignores.config.mjs")))
       (when base-dir
 	(let ((eslint (expand-file-name
 		       "tools/lint/eslint/node_modules/.bin/eslint" base-dir)))

docs/code-quality/lint/linters/eslint.rst

@@ -102,7 +102,7 @@ cycle.
 
 * If you really can't match the directory name, e.g. like the
   ``browser/base/content/tests/*``, then you'll need to add a new entry in
-  :searchfox:`.eslintrc-test-paths.js <.eslintrc-test-paths.js>`.
+  :searchfox:`eslint-test-paths.config.mjs <eslint-test-paths.config.mjs>`.
 
 Please do not add new cases of multiple types of tests within a single directory,
 this is `difficult for ESLint to handle`_. Currently this may cause:
@@ -116,7 +116,7 @@ This code should neither be linted nor formatted
 
 * If it is a third-party piece of code, please add it to :searchfox:`ThirdPartyPaths.txt <tools/rewriting/ThirdPartyPaths.txt>`.
 * If it is a generated file, please add it to :searchfox:`Generated.txt <tools/rewriting/Generated.txt>`.
-* If intentionally invalid, please add it to :searchfox:`.eslintrc-ignores.js <.eslintrc-ignores.js>`.
+* If intentionally invalid, please add it to :searchfox:`eslint-ignores.config.mjs <eslint-ignores.config.mjs>`.
 
 This code shouldn't be formatted
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -134,7 +134,7 @@ See the `prettier ignore docs`_ for more information.
 I have valid code that is failing the ``no-undef`` rule or can't be parsed
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-* Please do not add this to :searchfox:`.eslintrc-ignores.js <.eslintrc-ignores.js>`. Generally
+* Please do not add this to :searchfox:`eslint-ignores.config.mjs <eslint-ignores.config.mjs>`. Generally
   this can be fixed, if the following tips don't help, please `seek help`_.
 * If you are adding a new test directory, see the :ref:`section above <adding-tests>`
 

eslint-ignores.config.mjs

@@ -2,8 +2,6 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-"use strict";
-
 /**
  * Files to exclude from ESLint.
  *
@@ -20,7 +18,7 @@
  *
  * @type {string[]}
  */
-module.exports = [
+export default [
   // Include all js dot files.
   "!.*.js",
 

eslint-test-paths.config.mjs

@@ -2,8 +2,6 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-"use strict";
-
 // The `*testPaths` defined below for test paths are the main path formats we
 // prefer to support for tests as they are commonly used across the tree.
 
@@ -469,7 +467,7 @@ incorrectly applied.
   paths.add(path);
 }
 
-module.exports = {
+export default {
   testPaths: {
     browser: [...browserTestPaths, ...extraBrowserTestPaths],
     chrome: [...chromeTestPaths, ...extraChromeTestPaths],

eslint.config.mjs

@@ -16,8 +16,8 @@ import globals from "globals";
 import path from "path";
 import { fileURLToPath } from "url";
 
-import globalIgnores from "./.eslintrc-ignores.js";
-import testPathsConfig from "./.eslintrc-test-paths.js";
+import globalIgnores from "./eslint-ignores.config.mjs";
+import testPathsConfig from "./eslint-test-paths.config.mjs";
 import repositoryGlobals from "./eslint-file-globals.config.mjs";
 import rollouts from "./eslint-rollouts.config.mjs";
 import subdirConfigs from "./eslint-subdirs.config.mjs";

mots.yaml

@@ -8,7 +8,7 @@
 # documentation and how to modify this file.
 repo: mozilla-central
 created_at: '2021-10-14T12:50:40.073465'
-updated_at: '2025-05-07T01:05:49.262826+00:00'
+updated_at: '2025-05-21T09:20:14.661913+00:00'
 export:
   path: ./docs/mots/index.rst
   format: rst
@@ -3997,7 +3997,7 @@ modules:
     description: Aspects of JavaScript use such as language feature usage, tooling
       such as lint configurations, formatting and naming style.
     includes:
-      - .eslintrc-test-paths.js
+      - eslint*.config.mjs
       - '**/.eslintrc*.js'
       - tools/lint/eslint/**/*
       - .prettier*
@@ -4567,5 +4567,5 @@ modules:
         - Ryan Tilder
       group: dev-platform
 hashes:
-  config: 3825a00753e2baaf500e62ea796ece96149e6937
-  export: e1e1829b45285c4e3a60c73a99e323a033d64945
+  config: 417f5aa3364f94e036f02a3612a733ab3cc9884a
+  export: f91f79309801aa730bc99a9a1f2bc64db1e64718