tools: update ESLint to 8.1.0

PR-URL: https://github.com/nodejs/node/pull/40582
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Voltrex <mohammadkeyvanzade94@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>

tools/node_modules/eslint/README.md

@@ -242,7 +242,7 @@ Toru Nagashima
 </td><td align="center" valign="top" width="11%">
 <a href="https://github.com/aladdin-add">
 <img src="https://github.com/aladdin-add.png?s=75" width="75" height="75"><br />
-薛定谔的猫
+唯然
 </a>
 </td></tr></tbody></table>
 

tools/node_modules/eslint/lib/cli-engine/cli-engine.js

@@ -570,8 +570,10 @@ class CLIEngine {
     /**
      * Creates a new instance of the core CLI engine.
      * @param {CLIEngineOptions} providedOptions The options for this instance.
+     * @param {Object} [additionalData] Additional settings that are not CLIEngineOptions.
+     * @param {Record<string,Plugin>|null} [additionalData.preloadedPlugins] Preloaded plugins.
      */
-    constructor(providedOptions) {
+    constructor(providedOptions, { preloadedPlugins } = {}) {
         const options = Object.assign(
             Object.create(null),
             defaultOptions,
@@ -584,6 +586,13 @@ class CLIEngine {
         }
 
         const additionalPluginPool = new Map();
+
+        if (preloadedPlugins) {
+            for (const [id, plugin] of Object.entries(preloadedPlugins)) {
+                additionalPluginPool.set(id, plugin);
+            }
+        }
+
         const cacheFilePath = getCacheFile(
             options.cacheLocation || options.cacheFile,
             options.cwd
@@ -698,26 +707,6 @@ class CLIEngine {
         });
     }
 
-
-    /**
-     * Add a plugin by passing its configuration
-     * @param {string} name Name of the plugin.
-     * @param {Plugin} pluginObject Plugin configuration object.
-     * @returns {void}
-     */
-    addPlugin(name, pluginObject) {
-        const {
-            additionalPluginPool,
-            configArrayFactory,
-            lastConfigArrays
-        } = internalSlotsMap.get(this);
-
-        additionalPluginPool.set(name, pluginObject);
-        configArrayFactory.clearCache();
-        lastConfigArrays.length = 1;
-        lastConfigArrays[0] = configArrayFactory.getConfigArrayForFile();
-    }
-
     /**
      * Resolves the patterns passed into executeOnFiles() into glob-based patterns
      * for easier handling.

tools/node_modules/eslint/lib/eslint/eslint.js

@@ -54,7 +54,7 @@ const { version } = require("../../package.json");
  * @property {string} [ignorePath] The ignore file to use instead of .eslintignore.
  * @property {ConfigData} [overrideConfig] Override config object, overrides all configs used with this instance
  * @property {string} [overrideConfigFile] The configuration file to use.
- * @property {Record<string,Plugin>} [plugins] An array of plugin implementations.
+ * @property {Record<string,Plugin>|null} [plugins] Preloaded plugins. This is a map-like object, keys are plugin IDs and each value is implementation.
  * @property {"error" | "warn" | "off"} [reportUnusedDisableDirectives] the severity to report unused eslint-disable directives.
  * @property {string} [resolvePluginsRelativeTo] The folder where plugins should be resolved from, defaulting to the CWD.
  * @property {string[]} [rulePaths] An array of directories to load custom rules from.
@@ -433,26 +433,13 @@ class ESLint {
      */
     constructor(options = {}) {
         const processedOptions = processOptions(options);
-        const cliEngine = new CLIEngine(processedOptions);
+        const cliEngine = new CLIEngine(processedOptions, { preloadedPlugins: options.plugins });
         const {
-            additionalPluginPool,
             configArrayFactory,
             lastConfigArrays
         } = getCLIEngineInternalSlots(cliEngine);
         let updated = false;
 
-        /*
-         * Address `plugins` to add plugin implementations.
-         * Operate the `additionalPluginPool` internal slot directly to avoid
-         * using `addPlugin(id, plugin)` method that resets cache everytime.
-         */
-        if (options.plugins) {
-            for (const [id, plugin] of Object.entries(options.plugins)) {
-                additionalPluginPool.set(id, plugin);
-                updated = true;
-            }
-        }
-
         /*
          * Address `overrideConfig` to set override config.
          * Operate the `configArrayFactory` internal slot directly because this

tools/node_modules/eslint/lib/linter/config-comment-parser.js

@@ -15,7 +15,7 @@ const levn = require("levn"),
         Legacy: {
             ConfigOps
         }
-    } = require("@eslint/eslintrc/universal"); // eslint-disable-line node/no-missing-require -- false positive
+    } = require("@eslint/eslintrc/universal");
 
 const debug = require("debug")("eslint:config-comment-parser");
 

tools/node_modules/eslint/lib/linter/linter.js

@@ -24,7 +24,7 @@ const
             ConfigValidator,
             environments: BuiltInEnvironments
         }
-    } = require("@eslint/eslintrc/universal"), // eslint-disable-line node/no-missing-require -- false positive
+    } = require("@eslint/eslintrc/universal"),
     Traverser = require("../shared/traverser"),
     { SourceCode } = require("../source-code"),
     CodePathAnalyzer = require("./code-path-analysis/code-path-analyzer"),

tools/node_modules/eslint/lib/linter/node-event-generator.js

@@ -98,6 +98,13 @@ function getPossibleTypes(parsedSelector) {
         case "adjacent":
             return getPossibleTypes(parsedSelector.right);
 
+        case "class":
+            if (parsedSelector.name === "function") {
+                return ["FunctionDeclaration", "FunctionExpression", "ArrowFunctionExpression"];
+            }
+
+            return null;
+
         default:
             return null;
 

tools/node_modules/eslint/lib/rule-tester/rule-tester.js

@@ -67,6 +67,7 @@ const { SourceCode } = require("../source-code");
 /**
  * A test case that is expected to pass lint.
  * @typedef {Object} ValidTestCase
+ * @property {string} [name] Name for the test case.
  * @property {string} code Code for the test case.
  * @property {any[]} [options] Options for the test case.
  * @property {{ [name: string]: any }} [settings] Settings for the test case.
@@ -81,6 +82,7 @@ const { SourceCode } = require("../source-code");
 /**
  * A test case that is expected to fail lint.
  * @typedef {Object} InvalidTestCase
+ * @property {string} [name] Name for the test case.
  * @property {string} code Code for the test case.
  * @property {number | Array<TestCaseError | string | RegExp>} errors Expected errors.
  * @property {string | null} [output] The expected code after autofixes are applied. If set to `null`, the test runner will assert that no autofix is suggested.
@@ -124,6 +126,7 @@ let defaultConfig = { rules: {} };
  * configuration
  */
 const RuleTesterParameters = [
+    "name",
     "code",
     "filename",
     "options",
@@ -964,7 +967,7 @@ class RuleTester {
             RuleTester.describe("valid", () => {
                 test.valid.forEach(valid => {
                     RuleTester[valid.only ? "itOnly" : "it"](
-                        sanitize(typeof valid === "object" ? valid.code : valid),
+                        sanitize(typeof valid === "object" ? valid.name || valid.code : valid),
                         () => {
                             testValidTemplate(valid);
                         }
@@ -975,7 +978,7 @@ class RuleTester {
             RuleTester.describe("invalid", () => {
                 test.invalid.forEach(invalid => {
                     RuleTester[invalid.only ? "itOnly" : "it"](
-                        sanitize(invalid.code),
+                        sanitize(invalid.name || invalid.code),
                         () => {
                             testInvalidTemplate(invalid);
                         }

tools/node_modules/eslint/lib/rules/index.js

@@ -221,6 +221,7 @@ module.exports = new LazyLoadingRuleMap(Object.entries({
     "no-unsafe-optional-chaining": () => require("./no-unsafe-optional-chaining"),
     "no-unused-expressions": () => require("./no-unused-expressions"),
     "no-unused-labels": () => require("./no-unused-labels"),
+    "no-unused-private-class-members": () => require("./no-unused-private-class-members"),
     "no-unused-vars": () => require("./no-unused-vars"),
     "no-use-before-define": () => require("./no-use-before-define"),
     "no-useless-backreference": () => require("./no-useless-backreference"),

tools/node_modules/eslint/lib/rules/keyword-spacing.js

@@ -109,6 +109,8 @@ module.exports = {
     create(context) {
         const sourceCode = context.getSourceCode();
 
+        const tokensToIgnore = new WeakSet();
+
         /**
          * Reports a given token if there are not space(s) before the token.
          * @param {Token} token A token to report.
@@ -121,6 +123,7 @@ module.exports = {
             if (prevToken &&
                 (CHECK_TYPE.test(prevToken.type) || pattern.test(prevToken.value)) &&
                 !isOpenParenOfTemplate(prevToken) &&
+                !tokensToIgnore.has(prevToken) &&
                 astUtils.isTokenOnSameLine(prevToken, token) &&
                 !sourceCode.isSpaceBetweenTokens(prevToken, token)
             ) {
@@ -147,6 +150,7 @@ module.exports = {
             if (prevToken &&
                 (CHECK_TYPE.test(prevToken.type) || pattern.test(prevToken.value)) &&
                 !isOpenParenOfTemplate(prevToken) &&
+                !tokensToIgnore.has(prevToken) &&
                 astUtils.isTokenOnSameLine(prevToken, token) &&
                 sourceCode.isSpaceBetweenTokens(prevToken, token)
             ) {
@@ -173,6 +177,7 @@ module.exports = {
             if (nextToken &&
                 (CHECK_TYPE.test(nextToken.type) || pattern.test(nextToken.value)) &&
                 !isCloseParenOfTemplate(nextToken) &&
+                !tokensToIgnore.has(nextToken) &&
                 astUtils.isTokenOnSameLine(token, nextToken) &&
                 !sourceCode.isSpaceBetweenTokens(token, nextToken)
             ) {
@@ -199,6 +204,7 @@ module.exports = {
             if (nextToken &&
                 (CHECK_TYPE.test(nextToken.type) || pattern.test(nextToken.value)) &&
                 !isCloseParenOfTemplate(nextToken) &&
+                !tokensToIgnore.has(nextToken) &&
                 astUtils.isTokenOnSameLine(token, nextToken) &&
                 sourceCode.isSpaceBetweenTokens(token, nextToken)
             ) {
@@ -584,7 +590,14 @@ module.exports = {
             ImportNamespaceSpecifier: checkSpacingForImportNamespaceSpecifier,
             MethodDefinition: checkSpacingForProperty,
             PropertyDefinition: checkSpacingForProperty,
-            Property: checkSpacingForProperty
+            Property: checkSpacingForProperty,
+
+            // To avoid conflicts with `space-infix-ops`, e.g. `a > this.b`
+            "BinaryExpression[operator='>']"(node) {
+                const operatorToken = sourceCode.getTokenBefore(node.right, astUtils.isNotOpeningParenToken);
+
+                tokensToIgnore.add(operatorToken);
+            }
         };
     }
 };

tools/node_modules/eslint/lib/rules/no-unused-private-class-members.js

@@ -0,0 +1,194 @@
+/**
+ * @fileoverview Rule to flag declared but unused private class members
+ * @author Tim van der Lippe
+ */
+
+"use strict";
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        type: "problem",
+
+        docs: {
+            description: "disallow unused private class members",
+            recommended: false,
+            url: "https://eslint.org/docs/rules/no-unused-private-class-members"
+        },
+
+        schema: [],
+
+        messages: {
+            unusedPrivateClassMember: "'{{classMemberName}}' is defined but never used."
+        }
+    },
+
+    create(context) {
+        const trackedClasses = [];
+
+        /**
+         * Check whether the current node is in a write only assignment.
+         * @param {ASTNode} privateIdentifierNode Node referring to a private identifier
+         * @returns {boolean} Whether the node is in a write only assignment
+         * @private
+         */
+        function isWriteOnlyAssignment(privateIdentifierNode) {
+            const parentStatement = privateIdentifierNode.parent.parent;
+            const isAssignmentExpression = parentStatement.type === "AssignmentExpression";
+
+            if (!isAssignmentExpression &&
+                parentStatement.type !== "ForInStatement" &&
+                parentStatement.type !== "ForOfStatement" &&
+                parentStatement.type !== "AssignmentPattern") {
+                return false;
+            }
+
+            // It is a write-only usage, since we still allow usages on the right for reads
+            if (parentStatement.left !== privateIdentifierNode.parent) {
+                return false;
+            }
+
+            // For any other operator (such as '+=') we still consider it a read operation
+            if (isAssignmentExpression && parentStatement.operator !== "=") {
+
+                /*
+                 * However, if the read operation is "discarded" in an empty statement, then
+                 * we consider it write only.
+                 */
+                return parentStatement.parent.type === "ExpressionStatement";
+            }
+
+            return true;
+        }
+
+        //--------------------------------------------------------------------------
+        // Public
+        //--------------------------------------------------------------------------
+
+        return {
+
+            // Collect all declared members up front and assume they are all unused
+            ClassBody(classBodyNode) {
+                const privateMembers = new Map();
+
+                trackedClasses.unshift(privateMembers);
+                for (const bodyMember of classBodyNode.body) {
+                    if (bodyMember.type === "PropertyDefinition" || bodyMember.type === "MethodDefinition") {
+                        if (bodyMember.key.type === "PrivateIdentifier") {
+                            privateMembers.set(bodyMember.key.name, {
+                                declaredNode: bodyMember,
+                                isAccessor: bodyMember.type === "MethodDefinition" &&
+                                    (bodyMember.kind === "set" || bodyMember.kind === "get")
+                            });
+                        }
+                    }
+                }
+            },
+
+            /*
+             * Process all usages of the private identifier and remove a member from
+             * `declaredAndUnusedPrivateMembers` if we deem it used.
+             */
+            PrivateIdentifier(privateIdentifierNode) {
+                const classBody = trackedClasses.find(classProperties => classProperties.has(privateIdentifierNode.name));
+
+                // Can't happen, as it is a parser to have a missing class body, but let's code defensively here.
+                if (!classBody) {
+                    return;
+                }
+
+                // In case any other usage was already detected, we can short circuit the logic here.
+                const memberDefinition = classBody.get(privateIdentifierNode.name);
+
+                if (memberDefinition.isUsed) {
+                    return;
+                }
+
+                // The definition of the class member itself
+                if (privateIdentifierNode.parent.type === "PropertyDefinition" ||
+                    privateIdentifierNode.parent.type === "MethodDefinition") {
+                    return;
+                }
+
+                /*
+                 * Any usage of an accessor is considered a read, as the getter/setter can have
+                 * side-effects in its definition.
+                 */
+                if (memberDefinition.isAccessor) {
+                    memberDefinition.isUsed = true;
+                    return;
+                }
+
+                // Any assignments to this member, except for assignments that also read
+                if (isWriteOnlyAssignment(privateIdentifierNode)) {
+                    return;
+                }
+
+                const wrappingExpressionType = privateIdentifierNode.parent.parent.type;
+                const parentOfWrappingExpressionType = privateIdentifierNode.parent.parent.parent.type;
+
+                // A statement which only increments (`this.#x++;`)
+                if (wrappingExpressionType === "UpdateExpression" &&
+                    parentOfWrappingExpressionType === "ExpressionStatement") {
+                    return;
+                }
+
+                /*
+                 * ({ x: this.#usedInDestructuring } = bar);
+                 *
+                 * But should treat the following as a read:
+                 * ({ [this.#x]: a } = foo);
+                 */
+                if (wrappingExpressionType === "Property" &&
+                    parentOfWrappingExpressionType === "ObjectPattern" &&
+                    privateIdentifierNode.parent.parent.value === privateIdentifierNode.parent) {
+                    return;
+                }
+
+                // [...this.#unusedInRestPattern] = bar;
+                if (wrappingExpressionType === "RestElement") {
+                    return;
+                }
+
+                // [this.#unusedInAssignmentPattern] = bar;
+                if (wrappingExpressionType === "ArrayPattern") {
+                    return;
+                }
+
+                /*
+                 * We can't delete the memberDefinition, as we need to keep track of which member we are marking as used.
+                 * In the case of nested classes, we only mark the first member we encounter as used. If you were to delete
+                 * the member, then any subsequent usage could incorrectly mark the member of an encapsulating parent class
+                 * as used, which is incorrect.
+                 */
+                memberDefinition.isUsed = true;
+            },
+
+            /*
+             * Post-process the class members and report any remaining members.
+             * Since private members can only be accessed in the current class context,
+             * we can safely assume that all usages are within the current class body.
+             */
+            "ClassBody:exit"() {
+                const unusedPrivateMembers = trackedClasses.shift();
+
+                for (const [classMemberName, { declaredNode, isUsed }] of unusedPrivateMembers.entries()) {
+                    if (isUsed) {
+                        continue;
+                    }
+                    context.report({
+                        node: declaredNode,
+                        loc: declaredNode.key.loc,
+                        messageId: "unusedPrivateClassMember",
+                        data: {
+                            classMemberName: `#${classMemberName}`
+                        }
+                    });
+                }
+            }
+        };
+    }
+};

tools/node_modules/eslint/lib/shared/types.js

@@ -21,7 +21,7 @@ module.exports = {};
 /**
  * @typedef {Object} ParserOptions
  * @property {EcmaFeatures} [ecmaFeatures] The optional features.
- * @property {3|5|6|7|8|9|10|11|12|2015|2016|2017|2018|2019|2020|2021} [ecmaVersion] The ECMAScript version (or revision number).
+ * @property {3|5|6|7|8|9|10|11|12|13|2015|2016|2017|2018|2019|2020|2021|2022} [ecmaVersion] The ECMAScript version (or revision number).
  * @property {"script"|"module"} [sourceType] The source code type.
  */
 

tools/node_modules/eslint/node_modules/@eslint/eslintrc/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@eslint/eslintrc",
-  "version": "1.0.2",
+  "version": "1.0.3",
   "description": "The legacy ESLintRC config file format for ESLint",
   "type": "module",
   "main": "./dist/eslintrc.cjs",
@@ -19,7 +19,8 @@
     "lib",
     "conf",
     "LICENSE",
-    "dist"
+    "dist",
+    "universal.js"
   ],
   "publishConfig": {
     "access": "public"

tools/node_modules/eslint/node_modules/@eslint/eslintrc/universal.js

@@ -0,0 +1,9 @@
+// Jest (and probably some other runtimes with custom implementations of
+// `require`) doesn't support `exports` in `package.json`, so this file is here
+// to help them load this module. Note that it is also `.js` and not `.cjs` for
+// the same reason - `cjs` files requires to be loaded with an extension, but
+// since Jest doesn't respect `module` outside of ESM mode it still works in
+// this case (and the `require` in _this_ file does specify the extension).
+
+// eslint-disable-next-line no-undef
+module.exports = require("./dist/eslintrc-universal.cjs");

tools/node_modules/eslint/package.json

@@ -1,6 +1,6 @@
 {
   "name": "eslint",
-  "version": "8.0.0",
+  "version": "8.1.0",
   "author": "Nicholas C. Zakas <nicholas+npm@nczconsulting.com>",
   "description": "An AST-based pattern checker for JavaScript.",
   "bin": {
@@ -47,7 +47,7 @@
   "homepage": "https://eslint.org",
   "bugs": "https://github.com/eslint/eslint/issues/",
   "dependencies": {
-    "@eslint/eslintrc": "^1.0.2",
+    "@eslint/eslintrc": "^1.0.3",
     "@humanwhocodes/config-array": "^0.6.0",
     "ajv": "^6.10.0",
     "chalk": "^4.0.0",
@@ -99,7 +99,7 @@
     "eslint": "file:.",
     "eslint-config-eslint": "file:packages/eslint-config-eslint",
     "eslint-plugin-eslint-comments": "^3.2.0",
-    "eslint-plugin-eslint-plugin": "^3.5.3",
+    "eslint-plugin-eslint-plugin": "^4.0.1",
     "eslint-plugin-internal-rules": "file:tools/internal-rules",
     "eslint-plugin-jsdoc": "^36.0.6",
     "eslint-plugin-node": "^11.1.0",