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gecko-dev/.eslintrc.js

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/* This Source Code Form is subject to the terms of the Mozilla Public
* 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";
const xpcshellTestConfig = require("eslint-plugin-mozilla/lib/configs/xpcshell-test.js");
const browserTestConfig = require("eslint-plugin-mozilla/lib/configs/browser-test.js");
const mochitestTestConfig = require("eslint-plugin-mozilla/lib/configs/mochitest-test.js");
const chromeTestConfig = require("eslint-plugin-mozilla/lib/configs/chrome-test.js");
const fs = require("fs");
const path = require("path");
/**
* Some configurations have overrides, which can't be specified within overrides,
* so we need to remove them.
*/
function removeOverrides(config) {
config = { ...config };
delete config.overrides;
return config;
}
// The expressions defined below for test paths are the main path formats we
// prefer to support for tests as they are commonly used across the tree.
// See https://firefox-source-docs.mozilla.org/code-quality/lint/linters/eslint.html#i-m-adding-tests-how-do-i-set-up-the-right-configuration
// for more information.
const xpcshellTestPaths = [
"**/test*/unit*/**/",
"**/test*/*/unit*/",
"**/test*/xpcshell/**/",
];
const browserTestPaths = ["**/test*/**/browser*/"];
const mochitestTestPaths = [
// Note: we do not want to match testing/mochitest as that would apply
// too many globals for that directory.
"**/test/mochitest/",
"**/tests/mochitest/",
"**/test/mochitests/",
"testing/mochitest/tests/SimpleTest/",
"testing/mochitest/tests/Harness_sanity/",
];
const chromeTestPaths = ["**/test*/chrome/"];
const ignorePatterns = [
...fs
.readFileSync(
path.join(__dirname, "tools", "rewriting", "ThirdPartyPaths.txt")
)
.toString("utf-8")
.split("\n"),
...fs
.readFileSync(
path.join(
__dirname,
"devtools",
"client",
"debugger",
"src",
".eslintignore"
)
)
.toString("utf-8")
.split("\n")
.filter(p => p && !p.startsWith("#"))
.map(p => `devtools/client/debugger/src/${p}`),
];
module.exports = {
parser: "@babel/eslint-parser",
parserOptions: {
sourceType: "script",
babelOptions: {
configFile: path.join(__dirname, ".babel-eslint.rc.js"),
},
},
settings: {
"import/extensions": [".mjs"],
},
ignorePatterns,
// Ignore eslint configurations in parent directories.
root: true,
// New rules and configurations should generally be added in
// tools/lint/eslint/eslint-plugin-mozilla/lib/configs/recommended.js to
// allow external repositories that use the plugin to pick them up as well.
extends: ["plugin:mozilla/recommended"],
plugins: ["mozilla", "import"],
overrides: [
{
// All .eslintrc.js files are in the node environment, so turn that
// on here.
// https://github.com/eslint/eslint/issues/13008
files: [".eslintrc.js"],
env: {
node: true,
browser: false,
},
},
{
files: ["*.mjs"],
rules: {
"import/default": "error",
"import/export": "error",
"import/named": "error",
"import/namespace": "error",
"import/newline-after-import": "error",
"import/no-anonymous-default-export": "error",
"import/no-duplicates": "error",
"import/no-absolute-path": "error",
"import/no-named-default": "error",
"import/no-named-as-default": "error",
"import/no-named-as-default-member": "error",
"import/no-self-import": "error",
"import/no-unassigned-import": "error",
"import/no-unresolved": "error",
"import/no-useless-path-segments": "error",
},
},
{
files: [
// Bug 1773473 - Turn off no-unresolved for system mjs modules, as we
// do not yet have a resolver for resource:// uris.
"*.sys.mjs",
// Bug 1773475 - For now, turn off no-unresolved on some paths where we import
// from node_modules, as the ESLint setup only installs modules at the
// top-level.
"devtools/shared/compatibility/**",
],
rules: {
"import/no-unresolved": "off",
},
},
{
files: [
"*.html",
"*.xhtml",
"*.xml",
"js/src/builtin/**/*.js",
"js/src/shell/**/*.js",
],
rules: {
// Curly brackets are required for all the tree via recommended.js,
// however these files aren't auto-fixable at the moment.
curly: "off",
},
},
{
// TODO: Bug 1515949. Enable no-undef for gfx/
files: "gfx/layers/apz/test/mochitest/**",
rules: {
"no-undef": "off",
},
},
{
...removeOverrides(xpcshellTestConfig),
files: xpcshellTestPaths.map(path => `${path}**`),
excludedFiles: "devtools/**",
},
{
// If it is an xpcshell head file, we turn off global unused variable checks, as it
// would require searching the other test files to know if they are used or not.
// This would be expensive and slow, and it isn't worth it for head files.
// We could get developers to declare as exported, but that doesn't seem worth it.
files: xpcshellTestPaths.map(path => `${path}head*.js`),
rules: {
"no-unused-vars": [
"error",
{
args: "none",
vars: "local",
},
],
},
},
{
// This section enables warning of no-unused-vars globally for all test*.js
// files in xpcshell test paths.
// These are turned into errors with selected exclusions in the next
// section.
// Bug 1612907: This section should go away once the exclusions are removed
// from the following section.
files: xpcshellTestPaths.map(path => `${path}test*.js`),
rules: {
// No declaring variables that are never used
"no-unused-vars": [
"warn",
{
args: "none",
vars: "all",
},
],
},
},
{
// This section makes global issues with no-unused-vars be reported as
// errors - except for the excluded lists which are being fixed in the
// dependencies of bug 1612907.
files: xpcshellTestPaths.map(path => `${path}test*.js`),
excludedFiles: [
// These are suitable as good first bugs, take one or two related lines
// per bug.
"caps/tests/unit/test_origin.js",
"extensions/permissions/**",
"image/test/unit/**",
"intl/uconv/tests/unit/test_bug340714.js",
"modules/libjar/test/unit/test_empty_jar_telemetry.js",
"modules/libjar/zipwriter/test/unit/test_alignment.js",
"modules/libjar/zipwriter/test/unit/test_bug419769_2.js",
"modules/libjar/zipwriter/test/unit/test_storedata.js",
"modules/libjar/zipwriter/test/unit/test_zippermissions.js",
"modules/libpref/test/unit/test_dirtyPrefs.js",
"toolkit/crashreporter/test/unit/test_crash_AsyncShutdown.js",
"toolkit/mozapps/update/tests/unit_aus_update/testConstants.js",
// These are more complicated bugs which may require some in-depth
// investigation or different solutions. They are also likely to be
// a reasonable size.
"browser/components/**",
"browser/modules/**",
"dom/**",
"netwerk/**",
"security/manager/ssl/tests/unit/**",
"testing/xpcshell/**",
"toolkit/components/**",
"toolkit/modules/**",
],
rules: {
// No declaring variables that are never used
"no-unused-vars": [
"error",
{
args: "none",
vars: "all",
},
],
},
},
{
...browserTestConfig,
files: browserTestPaths.map(path => `${path}**`),
},
{
...removeOverrides(mochitestTestConfig),
files: mochitestTestPaths.map(path => `${path}**`),
excludedFiles: ["security/manager/ssl/tests/mochitest/browser/**"],
},
{
...removeOverrides(chromeTestConfig),
files: chromeTestPaths.map(path => `${path}**`),
},
{
env: {
// Ideally we wouldn't be using the simpletest env here, but our uses of
// js files mean we pick up everything from the global scope, which could
// be any one of a number of html files. So we just allow the basics...
"mozilla/simpletest": true,
},
files: [
...mochitestTestPaths.map(path => `${path}/**/*.js`),
...chromeTestPaths.map(path => `${path}/**/*.js`),
],
},
{
files: [
"netwerk/cookie/test/browser/**",
"netwerk/test/browser/**",
"netwerk/test/mochitests/**",
"netwerk/test/unit*/**",
],
rules: {
"mozilla/no-arbitrary-setTimeout": "off",
"mozilla/no-define-cc-etc": "off",
"consistent-return": "off",
"no-eval": "off",
"no-global-assign": "off",
"no-nested-ternary": "off",
"no-redeclare": "off",
"no-shadow": "off",
"no-throw-literal": "off",
},
},
{
files: ["layout/**"],
rules: {
"object-shorthand": "off",
"mozilla/avoid-removeChild": "off",
"mozilla/consistent-if-bracing": "off",
"mozilla/reject-importGlobalProperties": "off",
"mozilla/no-arbitrary-setTimeout": "off",
"mozilla/no-define-cc-etc": "off",
"mozilla/use-chromeutils-generateqi": "off",
"mozilla/use-default-preference-values": "off",
"mozilla/use-includes-instead-of-indexOf": "off",
"mozilla/use-services": "off",
"mozilla/use-ownerGlobal": "off",
complexity: "off",
"consistent-return": "off",
"no-array-constructor": "off",
"no-caller": "off",
"no-cond-assign": "off",
"no-extra-boolean-cast": "off",
"no-eval": "off",
"no-func-assign": "off",
"no-global-assign": "off",
"no-implied-eval": "off",
"no-lonely-if": "off",
"no-nested-ternary": "off",
"no-new-wrappers": "off",
"no-redeclare": "off",
"no-restricted-globals": "off",
"no-return-await": "off",
"no-sequences": "off",
"no-throw-literal": "off",
"no-useless-concat": "off",
"no-undef": "off",
"no-unreachable": "off",
"no-unsanitized/method": "off",
"no-unsanitized/property": "off",
"no-unsafe-negation": "off",
"no-unused-vars": "off",
"no-useless-return": "off",
},
},
{
files: [
"dom/animation/**",
"dom/base/test/*.*",
"dom/base/test/unit/test_serializers_entities*.js",
"dom/base/test/unit_ipc/**",
"dom/base/test/jsmodules/**",
"dom/base/*.*",
"dom/canvas/**",
"dom/encoding/**",
"dom/events/**",
"dom/fetch/**",
"dom/file/**",
"dom/html/**",
"dom/jsurl/**",
"dom/media/tests/**",
"dom/media/webaudio/**",
"dom/media/webrtc/tests/**",
"dom/media/webspeech/**",
"dom/messagechannel/**",
"dom/midi/**",
"dom/network/**",
"dom/payments/**",
"dom/performance/**",
"dom/permission/**",
"dom/quota/test/browser/**",
"dom/quota/test/common/**",
"dom/quota/test/mochitest/**",
"dom/quota/test/xpcshell/**",
"dom/security/test/cors/**",
"dom/security/test/csp/**",
"dom/security/test/mixedcontentblocker/**",
"dom/serviceworkers/**",
"dom/smil/**",
"dom/tests/mochitest/**",
"dom/u2f/**",
"dom/vr/**",
"dom/webauthn/**",
"dom/webgpu/**",
"dom/websocket/**",
"dom/workers/**",
"dom/worklet/**",
"dom/xml/**",
"dom/xslt/**",
"dom/xul/**",
"dom/ipc/test.xhtml",
],
rules: {
"consistent-return": "off",
"mozilla/avoid-removeChild": "off",
"mozilla/consistent-if-bracing": "off",
"mozilla/no-arbitrary-setTimeout": "off",
"mozilla/no-compare-against-boolean-literals": "off",
"mozilla/no-define-cc-etc": "off",
"mozilla/reject-importGlobalProperties": "off",
"mozilla/use-cc-etc": "off",
"mozilla/use-chromeutils-generateqi": "off",
"mozilla/use-includes-instead-of-indexOf": "off",
"mozilla/use-ownerGlobal": "off",
"mozilla/use-services": "off",
"no-array-constructor": "off",
"no-caller": "off",
"no-cond-assign": "off",
"no-control-regex": "off",
"no-debugger": "off",
"no-else-return": "off",
"no-empty": "off",
"no-eval": "off",
"no-func-assign": "off",
"no-global-assign": "off",
"no-implied-eval": "off",
"no-lone-blocks": "off",
"no-lonely-if": "off",
"no-nested-ternary": "off",
"no-new-object": "off",
"no-new-wrappers": "off",
"no-redeclare": "off",
"no-return-await": "off",
"no-restricted-globals": "off",
"no-self-assign": "off",
"no-self-compare": "off",
"no-sequences": "off",
"no-shadow": "off",
"no-shadow-restricted-names": "off",
"no-sparse-arrays": "off",
"no-throw-literal": "off",
"no-unreachable": "off",
"no-unsanitized/method": "off",
"no-unsanitized/property": "off",
"no-undef": "off",
"no-unused-vars": "off",
"no-useless-call": "off",
"no-useless-concat": "off",
"no-useless-return": "off",
"no-with": "off",
},
},
{
files: [
"testing/mochitest/browser-harness.xhtml",
"testing/mochitest/chrome/test_chromeGetTestFile.xhtml",
"testing/mochitest/chrome/test_sanityEventUtils.xhtml",
"testing/mochitest/chrome/test_sanityException.xhtml",
"testing/mochitest/chrome/test_sanityException2.xhtml",
"testing/mochitest/harness.xhtml",
],
rules: {
"dot-notation": "off",
"object-shorthand": "off",
"mozilla/use-services": "off",
"mozilla/no-compare-against-boolean-literals": "off",
"mozilla/no-useless-parameters": "off",
"mozilla/no-useless-removeEventListener": "off",
"mozilla/use-cc-etc": "off",
"consistent-return": "off",
"no-fallthrough": "off",
"no-nested-ternary": "off",
"no-redeclare": "off",
"no-sequences": "off",
"no-shadow": "off",
"no-throw-literal": "off",
"no-undef": "off",
"no-unsanitized/property": "off",
"no-unused-vars": "off",
"no-useless-call": "off",
},
},
{
files: [
"dom/base/test/chrome/file_bug1139964.xhtml",
"dom/base/test/chrome/file_bug549682.xhtml",
"dom/base/test/chrome/file_bug616841.xhtml",
"dom/base/test/chrome/file_bug990812-1.xhtml",
"dom/base/test/chrome/file_bug990812-2.xhtml",
"dom/base/test/chrome/file_bug990812-3.xhtml",
"dom/base/test/chrome/file_bug990812-4.xhtml",
"dom/base/test/chrome/file_bug990812-5.xhtml",
"dom/base/test/chrome/file_bug990812.xhtml",
"dom/base/test/chrome/test_bug1098074_throw_from_ReceiveMessage.xhtml",
"dom/base/test/chrome/test_bug339494.xhtml",
"dom/base/test/chrome/test_bug429785.xhtml",
"dom/base/test/chrome/test_bug467123.xhtml",
"dom/base/test/chrome/test_bug683852.xhtml",
"dom/base/test/chrome/test_bug780529.xhtml",
"dom/base/test/chrome/test_bug800386.xhtml",
"dom/base/test/chrome/test_bug884693.xhtml",
"dom/base/test/chrome/test_document-element-inserted.xhtml",
"dom/base/test/chrome/test_domparsing.xhtml",
"dom/base/test/chrome/title_window.xhtml",
"dom/base/test/chrome/window_nsITextInputProcessor.xhtml",
"dom/base/test/chrome/window_swapFrameLoaders.xhtml",
"dom/base/test/test_domrequesthelper.xhtml",
"dom/bindings/test/test_bug1123516_maplikesetlikechrome.xhtml",
"dom/console/tests/test_jsm.xhtml",
"dom/events/test/test_bug1412775.xhtml",
"dom/events/test/test_bug336682_2.xhtml",
"dom/events/test/test_bug415498.xhtml",
"dom/events/test/test_bug602962.xhtml",
"dom/events/test/test_bug617528.xhtml",
"dom/events/test/test_bug679494.xhtml",
"dom/indexedDB/test/test_globalObjects_chrome.xhtml",
"dom/indexedDB/test/test_wrappedArray.xhtml",
"dom/ipc/test.xhtml",
"dom/ipc/tests/test_process_error.xhtml",
"dom/notification/test/chrome/test_notification_system_principal.xhtml",
"dom/security/test/general/test_bug1277803.xhtml",
"dom/serviceworkers/test/test_serviceworkerinfo.xhtml",
"dom/serviceworkers/test/test_serviceworkermanager.xhtml",
"dom/system/tests/test_constants.xhtml",
"dom/tests/mochitest/chrome/DOMWindowCreated_chrome.xhtml",
"dom/tests/mochitest/chrome/MozDomFullscreen_chrome.xhtml",
"dom/tests/mochitest/chrome/sizemode_attribute.xhtml",
"dom/tests/mochitest/chrome/test_cyclecollector.xhtml",
"dom/tests/mochitest/chrome/test_docshell_swap.xhtml",
"dom/tests/mochitest/chrome/window_focus.xhtml",
"dom/url/tests/test_bug883784.xhtml",
"dom/workers/test/test_WorkerDebugger.xhtml",
"dom/workers/test/test_WorkerDebugger_console.xhtml",
"dom/workers/test/test_fileReadSlice.xhtml",
"dom/workers/test/test_fileReaderSync.xhtml",
"dom/workers/test/test_fileSlice.xhtml",
],
rules: {
"mozilla/no-useless-parameters": "off",
"mozilla/no-useless-removeEventListener": "off",
"mozilla/use-chromeutils-generateqi": "off",
"mozilla/use-services": "off",
complexity: "off",
"no-array-constructor": "off",
"no-caller": "off",
"no-empty": "off",
"no-eval": "off",
"no-lone-blocks": "off",
"no-redeclare": "off",
"no-shadow": "off",
"no-throw-literal": "off",
"no-unsanitized/method": "off",
"no-useless-return": "off",
"object-shorthand": "off",
},
},
{
files: [
"accessible/**",
"devtools/**",
"dom/**",
"docshell/**",
"editor/libeditor/tests/**",
"editor/spellchecker/tests/test_bug338427.html",
"gfx/**",
"image/test/browser/browser_image.js",
"js/src/builtin/**",
"layout/**",
"mobile/android/**",
"modules/**",
"netwerk/**",
"remote/**",
"security/manager/**",
"services/**",
"storage/test/unit/test_vacuum.js",
"taskcluster/docker/periodic-updates/scripts/**",
"testing/**",
"tools/**",
"widget/tests/test_assign_event_data.html",
],
rules: {
"mozilla/prefer-boolean-length-check": "off",
},
},
{
// Rules of Hooks broadly checks for camelCase "use" identifiers, so
// enable only for paths actually using React to avoid false positives.
extends: ["plugin:react-hooks/recommended"],
files: [
"browser/components/newtab/**",
"browser/components/pocket/**",
"devtools/**",
],
},
{
// Turn off the osfile rule for osfile.
files: ["toolkit/components/osfile/**"],
rules: {
"mozilla/reject-osfile": "off",
},
},
],
};
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