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/home/techb158/balavpn.abdallabala.com/node_modules/eslint/lib/languages/js
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index.js
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/home/techb158/balavpn.abdallabala.com/node_modules/eslint/lib/languages/js/index.js
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/** * @fileoverview JavaScript Language Object * @author Nicholas C. Zakas */ "use strict"; //----------------------------------------------------------------------------- // Requirements //----------------------------------------------------------------------------- const { SourceCode } = require("./source-code"); const createDebug = require("debug"); const astUtils = require("../../shared/ast-utils"); const espree = require("espree"); const eslintScope = require("eslint-scope"); const evk = require("eslint-visitor-keys"); const { validateLanguageOptions } = require("./validate-language-options"); const { LATEST_ECMA_VERSION } = require("../../../conf/ecma-version"); //----------------------------------------------------------------------------- // Type Definitions //----------------------------------------------------------------------------- /** @typedef {import("@eslint/core").File} File */ /** @typedef {import("@eslint/core").Language} Language */ /** @typedef {import("@eslint/core").OkParseResult} OkParseResult */ /** @typedef {import("../../types").Linter.LanguageOptions} JSLanguageOptions */ //----------------------------------------------------------------------------- // Helpers //----------------------------------------------------------------------------- const debug = createDebug("eslint:languages:js"); const DEFAULT_ECMA_VERSION = 5; const parserSymbol = Symbol.for("eslint.RuleTester.parser"); /** * Analyze scope of the given AST. * @param {ASTNode} ast The `Program` node to analyze. * @param {JSLanguageOptions} languageOptions The parser options. * @param {Record<string, string[]>} visitorKeys The visitor keys. * @returns {ScopeManager} The analysis result. */ function analyzeScope(ast, languageOptions, visitorKeys) { const parserOptions = languageOptions.parserOptions; const ecmaFeatures = parserOptions.ecmaFeatures || {}; const ecmaVersion = languageOptions.ecmaVersion || DEFAULT_ECMA_VERSION; return eslintScope.analyze(ast, { ignoreEval: true, nodejsScope: ecmaFeatures.globalReturn, impliedStrict: ecmaFeatures.impliedStrict, ecmaVersion: typeof ecmaVersion === "number" ? ecmaVersion : 6, sourceType: languageOptions.sourceType || "script", childVisitorKeys: visitorKeys || evk.KEYS, fallback: evk.getKeys, }); } /** * Determines if a given object is Espree. * @param {Object} parser The parser to check. * @returns {boolean} True if the parser is Espree or false if not. */ function isEspree(parser) { return !!(parser === espree || parser[parserSymbol] === espree); } /** * Normalize ECMAScript version from the initial config into languageOptions (year) * format. * @param {any} [ecmaVersion] ECMAScript version from the initial config * @returns {number} normalized ECMAScript version */ function normalizeEcmaVersionForLanguageOptions(ecmaVersion) { switch (ecmaVersion) { case 3: return 3; // void 0 = no ecmaVersion specified so use the default case 5: case void 0: return 5; default: if (typeof ecmaVersion === "number") { return ecmaVersion >= 2015 ? ecmaVersion : ecmaVersion + 2009; } } /* * We default to the latest supported ecmaVersion for everything else. * Remember, this is for languageOptions.ecmaVersion, which sets the version * that is used for a number of processes inside of ESLint. It's normally * safe to assume people want the latest unless otherwise specified. */ return LATEST_ECMA_VERSION; } //----------------------------------------------------------------------------- // Exports //----------------------------------------------------------------------------- /** * @type {Language} */ module.exports = { fileType: "text", lineStart: 1, columnStart: 0, nodeTypeKey: "type", visitorKeys: evk.KEYS, defaultLanguageOptions: { sourceType: "module", ecmaVersion: "latest", parser: espree, parserOptions: {}, }, validateLanguageOptions, /** * Normalizes the language options. * @param {Object} languageOptions The language options to normalize. * @returns {Object} The normalized language options. */ normalizeLanguageOptions(languageOptions) { languageOptions.ecmaVersion = normalizeEcmaVersionForLanguageOptions( languageOptions.ecmaVersion, ); // Espree expects this information to be passed in if (isEspree(languageOptions.parser)) { const parserOptions = languageOptions.parserOptions; if (languageOptions.sourceType) { parserOptions.sourceType = languageOptions.sourceType; if ( parserOptions.sourceType === "module" && parserOptions.ecmaFeatures && parserOptions.ecmaFeatures.globalReturn ) { parserOptions.ecmaFeatures.globalReturn = false; } } } return languageOptions; }, /** * Determines if a given node matches a given selector class. * @param {string} className The class name to check. * @param {ASTNode} node The node to check. * @param {Array<ASTNode>} ancestry The ancestry of the node. * @returns {boolean} True if there's a match, false if not. * @throws {Error} When an unknown class name is passed. */ matchesSelectorClass(className, node, ancestry) { /* * Copyright (c) 2013, Joel Feenstra * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * Neither the name of the ESQuery nor the names of its contributors may * be used to endorse or promote products derived from this software without * specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL JOEL FEENSTRA BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ switch (className.toLowerCase()) { case "statement": if (node.type.slice(-9) === "Statement") { return true; } // fallthrough: interface Declaration <: Statement { } case "declaration": return node.type.slice(-11) === "Declaration"; case "pattern": if (node.type.slice(-7) === "Pattern") { return true; } // fallthrough: interface Expression <: Node, Pattern { } case "expression": return ( node.type.slice(-10) === "Expression" || node.type.slice(-7) === "Literal" || (node.type === "Identifier" && (ancestry.length === 0 || ancestry[0].type !== "MetaProperty")) || node.type === "MetaProperty" ); case "function": return ( node.type === "FunctionDeclaration" || node.type === "FunctionExpression" || node.type === "ArrowFunctionExpression" ); default: throw new Error(`Unknown class name: ${className}`); } }, /** * Parses the given file into an AST. * @param {File} file The virtual file to parse. * @param {Object} options Additional options passed from ESLint. * @param {JSLanguageOptions} options.languageOptions The language options. * @returns {Object} The result of parsing. */ parse(file, { languageOptions }) { // Note: BOM already removed const { body: text, path: filePath } = file; const textToParse = text.replace( astUtils.shebangPattern, (match, captured) => `//${captured}`, ); const { ecmaVersion, sourceType, parser } = languageOptions; const parserOptions = Object.assign( { ecmaVersion, sourceType }, languageOptions.parserOptions, { loc: true, range: true, raw: true, tokens: true, comment: true, eslintVisitorKeys: true, eslintScopeManager: true, filePath, }, ); /* * Check for parsing errors first. If there's a parsing error, nothing * else can happen. However, a parsing error does not throw an error * from this method - it's just considered a fatal error message, a * problem that ESLint identified just like any other. */ try { debug("Parsing:", filePath); const parseResult = typeof parser.parseForESLint === "function" ? parser.parseForESLint(textToParse, parserOptions) : { ast: parser.parse(textToParse, parserOptions) }; debug("Parsing successful:", filePath); const { ast, services: parserServices = {}, visitorKeys = evk.KEYS, scopeManager, } = parseResult; return { ok: true, ast, parserServices, visitorKeys, scopeManager, }; } catch (ex) { // If the message includes a leading line number, strip it: const message = ex.message.replace(/^line \d+:/iu, "").trim(); debug("%s\n%s", message, ex.stack); return { ok: false, errors: [ { message, line: ex.lineNumber, column: ex.column, }, ], }; } }, /** * Creates a new `SourceCode` object from the given information. * @param {File} file The virtual file to create a `SourceCode` object from. * @param {OkParseResult} parseResult The result returned from `parse()`. * @param {Object} options Additional options passed from ESLint. * @param {JSLanguageOptions} options.languageOptions The language options. * @returns {SourceCode} The new `SourceCode` object. */ createSourceCode(file, parseResult, { languageOptions }) { const { body: text, path: filePath, bom: hasBOM } = file; const { ast, parserServices, visitorKeys } = parseResult; debug("Scope analysis:", filePath); const scopeManager = parseResult.scopeManager || analyzeScope(ast, languageOptions, visitorKeys); debug("Scope analysis successful:", filePath); return new SourceCode({ text, ast, hasBOM, parserServices, scopeManager, visitorKeys, }); }, };
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