1077 lines
38 KiB
JavaScript
1077 lines
38 KiB
JavaScript
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/**
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* @fileoverview Abstraction of JavaScript source code.
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* @author Nicholas C. Zakas
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*/
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"use strict";
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//------------------------------------------------------------------------------
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// Requirements
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//------------------------------------------------------------------------------
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const
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{ isCommentToken } = require("@eslint-community/eslint-utils"),
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TokenStore = require("./token-store"),
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astUtils = require("../shared/ast-utils"),
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Traverser = require("../shared/traverser"),
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globals = require("../../conf/globals"),
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{
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directivesPattern
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} = require("../shared/directives"),
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/* eslint-disable-next-line n/no-restricted-require -- Too messy to figure out right now. */
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ConfigCommentParser = require("../linter/config-comment-parser"),
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eslintScope = require("eslint-scope");
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//------------------------------------------------------------------------------
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// Type Definitions
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//------------------------------------------------------------------------------
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/** @typedef {import("eslint-scope").Variable} Variable */
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//------------------------------------------------------------------------------
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// Private
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//------------------------------------------------------------------------------
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const commentParser = new ConfigCommentParser();
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/**
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* Validates that the given AST has the required information.
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* @param {ASTNode} ast The Program node of the AST to check.
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* @throws {Error} If the AST doesn't contain the correct information.
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* @returns {void}
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* @private
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*/
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function validate(ast) {
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if (!ast.tokens) {
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throw new Error("AST is missing the tokens array.");
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}
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if (!ast.comments) {
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throw new Error("AST is missing the comments array.");
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}
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if (!ast.loc) {
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throw new Error("AST is missing location information.");
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}
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if (!ast.range) {
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throw new Error("AST is missing range information");
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}
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}
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/**
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* Retrieves globals for the given ecmaVersion.
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* @param {number} ecmaVersion The version to retrieve globals for.
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* @returns {Object} The globals for the given ecmaVersion.
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*/
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function getGlobalsForEcmaVersion(ecmaVersion) {
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switch (ecmaVersion) {
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case 3:
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return globals.es3;
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case 5:
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return globals.es5;
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default:
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if (ecmaVersion < 2015) {
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return globals[`es${ecmaVersion + 2009}`];
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}
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return globals[`es${ecmaVersion}`];
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}
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}
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/**
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* Check to see if its a ES6 export declaration.
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* @param {ASTNode} astNode An AST node.
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* @returns {boolean} whether the given node represents an export declaration.
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* @private
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*/
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function looksLikeExport(astNode) {
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return astNode.type === "ExportDefaultDeclaration" || astNode.type === "ExportNamedDeclaration" ||
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astNode.type === "ExportAllDeclaration" || astNode.type === "ExportSpecifier";
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}
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/**
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* Merges two sorted lists into a larger sorted list in O(n) time.
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* @param {Token[]} tokens The list of tokens.
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* @param {Token[]} comments The list of comments.
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* @returns {Token[]} A sorted list of tokens and comments.
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* @private
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*/
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function sortedMerge(tokens, comments) {
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const result = [];
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let tokenIndex = 0;
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let commentIndex = 0;
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while (tokenIndex < tokens.length || commentIndex < comments.length) {
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if (commentIndex >= comments.length || tokenIndex < tokens.length && tokens[tokenIndex].range[0] < comments[commentIndex].range[0]) {
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result.push(tokens[tokenIndex++]);
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} else {
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result.push(comments[commentIndex++]);
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}
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}
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return result;
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}
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/**
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* Normalizes a value for a global in a config
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* @param {(boolean|string|null)} configuredValue The value given for a global in configuration or in
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* a global directive comment
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* @returns {("readable"|"writeable"|"off")} The value normalized as a string
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* @throws Error if global value is invalid
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*/
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function normalizeConfigGlobal(configuredValue) {
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switch (configuredValue) {
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case "off":
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return "off";
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case true:
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case "true":
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case "writeable":
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case "writable":
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return "writable";
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case null:
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case false:
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case "false":
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case "readable":
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case "readonly":
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return "readonly";
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default:
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throw new Error(`'${configuredValue}' is not a valid configuration for a global (use 'readonly', 'writable', or 'off')`);
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}
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}
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/**
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* Determines if two nodes or tokens overlap.
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* @param {ASTNode|Token} first The first node or token to check.
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* @param {ASTNode|Token} second The second node or token to check.
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* @returns {boolean} True if the two nodes or tokens overlap.
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* @private
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*/
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function nodesOrTokensOverlap(first, second) {
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return (first.range[0] <= second.range[0] && first.range[1] >= second.range[0]) ||
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(second.range[0] <= first.range[0] && second.range[1] >= first.range[0]);
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}
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/**
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* Determines if two nodes or tokens have at least one whitespace character
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* between them. Order does not matter. Returns false if the given nodes or
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* tokens overlap.
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* @param {SourceCode} sourceCode The source code object.
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* @param {ASTNode|Token} first The first node or token to check between.
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* @param {ASTNode|Token} second The second node or token to check between.
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* @param {boolean} checkInsideOfJSXText If `true` is present, check inside of JSXText tokens for backward compatibility.
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* @returns {boolean} True if there is a whitespace character between
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* any of the tokens found between the two given nodes or tokens.
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* @public
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*/
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function isSpaceBetween(sourceCode, first, second, checkInsideOfJSXText) {
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if (nodesOrTokensOverlap(first, second)) {
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return false;
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}
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const [startingNodeOrToken, endingNodeOrToken] = first.range[1] <= second.range[0]
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? [first, second]
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: [second, first];
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const firstToken = sourceCode.getLastToken(startingNodeOrToken) || startingNodeOrToken;
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const finalToken = sourceCode.getFirstToken(endingNodeOrToken) || endingNodeOrToken;
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let currentToken = firstToken;
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while (currentToken !== finalToken) {
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const nextToken = sourceCode.getTokenAfter(currentToken, { includeComments: true });
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if (
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currentToken.range[1] !== nextToken.range[0] ||
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/*
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* For backward compatibility, check spaces in JSXText.
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* https://github.com/eslint/eslint/issues/12614
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*/
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(
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checkInsideOfJSXText &&
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nextToken !== finalToken &&
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nextToken.type === "JSXText" &&
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/\s/u.test(nextToken.value)
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)
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) {
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return true;
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}
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currentToken = nextToken;
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}
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return false;
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}
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//-----------------------------------------------------------------------------
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// Directive Comments
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//-----------------------------------------------------------------------------
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/**
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* Extract the directive and the justification from a given directive comment and trim them.
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* @param {string} value The comment text to extract.
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* @returns {{directivePart: string, justificationPart: string}} The extracted directive and justification.
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*/
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function extractDirectiveComment(value) {
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const match = /\s-{2,}\s/u.exec(value);
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if (!match) {
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return { directivePart: value.trim(), justificationPart: "" };
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}
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const directive = value.slice(0, match.index).trim();
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const justification = value.slice(match.index + match[0].length).trim();
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return { directivePart: directive, justificationPart: justification };
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}
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/**
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* Ensures that variables representing built-in properties of the Global Object,
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* and any globals declared by special block comments, are present in the global
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* scope.
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* @param {Scope} globalScope The global scope.
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* @param {Object|undefined} configGlobals The globals declared in configuration
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* @param {Object|undefined} inlineGlobals The globals declared in the source code
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* @returns {void}
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*/
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function addDeclaredGlobals(globalScope, configGlobals = {}, inlineGlobals = {}) {
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// Define configured global variables.
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for (const id of new Set([...Object.keys(configGlobals), ...Object.keys(inlineGlobals)])) {
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/*
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* `normalizeConfigGlobal` will throw an error if a configured global value is invalid. However, these errors would
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* typically be caught when validating a config anyway (validity for inline global comments is checked separately).
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*/
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const configValue = configGlobals[id] === void 0 ? void 0 : normalizeConfigGlobal(configGlobals[id]);
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const commentValue = inlineGlobals[id] && inlineGlobals[id].value;
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const value = commentValue || configValue;
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const sourceComments = inlineGlobals[id] && inlineGlobals[id].comments;
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if (value === "off") {
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continue;
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}
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let variable = globalScope.set.get(id);
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if (!variable) {
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variable = new eslintScope.Variable(id, globalScope);
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globalScope.variables.push(variable);
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globalScope.set.set(id, variable);
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}
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variable.eslintImplicitGlobalSetting = configValue;
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variable.eslintExplicitGlobal = sourceComments !== void 0;
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variable.eslintExplicitGlobalComments = sourceComments;
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variable.writeable = (value === "writable");
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}
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/*
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* "through" contains all references which definitions cannot be found.
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* Since we augment the global scope using configuration, we need to update
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* references and remove the ones that were added by configuration.
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*/
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globalScope.through = globalScope.through.filter(reference => {
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const name = reference.identifier.name;
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const variable = globalScope.set.get(name);
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if (variable) {
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/*
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* Links the variable and the reference.
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* And this reference is removed from `Scope#through`.
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*/
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reference.resolved = variable;
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variable.references.push(reference);
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return false;
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}
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return true;
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});
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}
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/**
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* Sets the given variable names as exported so they won't be triggered by
|
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* the `no-unused-vars` rule.
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* @param {eslint.Scope} globalScope The global scope to define exports in.
|
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* @param {Record<string,string>} variables An object whose keys are the variable
|
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* names to export.
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* @returns {void}
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*/
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function markExportedVariables(globalScope, variables) {
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Object.keys(variables).forEach(name => {
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const variable = globalScope.set.get(name);
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if (variable) {
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variable.eslintUsed = true;
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variable.eslintExported = true;
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}
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});
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}
|
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||
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//------------------------------------------------------------------------------
|
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// Public Interface
|
||
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//------------------------------------------------------------------------------
|
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|
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const caches = Symbol("caches");
|
||
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/**
|
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* Represents parsed source code.
|
||
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*/
|
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class SourceCode extends TokenStore {
|
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/**
|
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* @param {string|Object} textOrConfig The source code text or config object.
|
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* @param {string} textOrConfig.text The source code text.
|
||
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* @param {ASTNode} textOrConfig.ast The Program node of the AST representing the code. This AST should be created from the text that BOM was stripped.
|
||
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* @param {Object|null} textOrConfig.parserServices The parser services.
|
||
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* @param {ScopeManager|null} textOrConfig.scopeManager The scope of this source code.
|
||
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* @param {Object|null} textOrConfig.visitorKeys The visitor keys to traverse AST.
|
||
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* @param {ASTNode} [astIfNoConfig] The Program node of the AST representing the code. This AST should be created from the text that BOM was stripped.
|
||
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*/
|
||
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constructor(textOrConfig, astIfNoConfig) {
|
||
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let text, ast, parserServices, scopeManager, visitorKeys;
|
||
|
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|
||
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// Process overloading.
|
||
|
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if (typeof textOrConfig === "string") {
|
||
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text = textOrConfig;
|
||
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ast = astIfNoConfig;
|
||
|
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} else if (typeof textOrConfig === "object" && textOrConfig !== null) {
|
||
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text = textOrConfig.text;
|
||
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ast = textOrConfig.ast;
|
||
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parserServices = textOrConfig.parserServices;
|
||
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scopeManager = textOrConfig.scopeManager;
|
||
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visitorKeys = textOrConfig.visitorKeys;
|
||
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}
|
||
|
|
|
||
|
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validate(ast);
|
||
|
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super(ast.tokens, ast.comments);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* General purpose caching for the class.
|
||
|
|
*/
|
||
|
|
this[caches] = new Map([
|
||
|
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["scopes", new WeakMap()],
|
||
|
|
["vars", new Map()],
|
||
|
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["configNodes", void 0]
|
||
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]);
|
||
|
|
|
||
|
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/**
|
||
|
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* The flag to indicate that the source code has Unicode BOM.
|
||
|
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* @type {boolean}
|
||
|
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*/
|
||
|
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this.hasBOM = (text.charCodeAt(0) === 0xFEFF);
|
||
|
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|
||
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/**
|
||
|
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* The original text source code.
|
||
|
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* BOM was stripped from this text.
|
||
|
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* @type {string}
|
||
|
|
*/
|
||
|
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this.text = (this.hasBOM ? text.slice(1) : text);
|
||
|
|
|
||
|
|
/**
|
||
|
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* The parsed AST for the source code.
|
||
|
|
* @type {ASTNode}
|
||
|
|
*/
|
||
|
|
this.ast = ast;
|
||
|
|
|
||
|
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/**
|
||
|
|
* The parser services of this source code.
|
||
|
|
* @type {Object}
|
||
|
|
*/
|
||
|
|
this.parserServices = parserServices || {};
|
||
|
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|
||
|
|
/**
|
||
|
|
* The scope of this source code.
|
||
|
|
* @type {ScopeManager|null}
|
||
|
|
*/
|
||
|
|
this.scopeManager = scopeManager || null;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The visitor keys to traverse AST.
|
||
|
|
* @type {Object}
|
||
|
|
*/
|
||
|
|
this.visitorKeys = visitorKeys || Traverser.DEFAULT_VISITOR_KEYS;
|
||
|
|
|
||
|
|
// Check the source text for the presence of a shebang since it is parsed as a standard line comment.
|
||
|
|
const shebangMatched = this.text.match(astUtils.shebangPattern);
|
||
|
|
const hasShebang = shebangMatched && ast.comments.length && ast.comments[0].value === shebangMatched[1];
|
||
|
|
|
||
|
|
if (hasShebang) {
|
||
|
|
ast.comments[0].type = "Shebang";
|
||
|
|
}
|
||
|
|
|
||
|
|
this.tokensAndComments = sortedMerge(ast.tokens, ast.comments);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The source code split into lines according to ECMA-262 specification.
|
||
|
|
* This is done to avoid each rule needing to do so separately.
|
||
|
|
* @type {string[]}
|
||
|
|
*/
|
||
|
|
this.lines = [];
|
||
|
|
this.lineStartIndices = [0];
|
||
|
|
|
||
|
|
const lineEndingPattern = astUtils.createGlobalLinebreakMatcher();
|
||
|
|
let match;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Previously, this was implemented using a regex that
|
||
|
|
* matched a sequence of non-linebreak characters followed by a
|
||
|
|
* linebreak, then adding the lengths of the matches. However,
|
||
|
|
* this caused a catastrophic backtracking issue when the end
|
||
|
|
* of a file contained a large number of non-newline characters.
|
||
|
|
* To avoid this, the current implementation just matches newlines
|
||
|
|
* and uses match.index to get the correct line start indices.
|
||
|
|
*/
|
||
|
|
while ((match = lineEndingPattern.exec(this.text))) {
|
||
|
|
this.lines.push(this.text.slice(this.lineStartIndices[this.lineStartIndices.length - 1], match.index));
|
||
|
|
this.lineStartIndices.push(match.index + match[0].length);
|
||
|
|
}
|
||
|
|
this.lines.push(this.text.slice(this.lineStartIndices[this.lineStartIndices.length - 1]));
|
||
|
|
|
||
|
|
// Cache for comments found using getComments().
|
||
|
|
this._commentCache = new WeakMap();
|
||
|
|
|
||
|
|
// don't allow further modification of this object
|
||
|
|
Object.freeze(this);
|
||
|
|
Object.freeze(this.lines);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Split the source code into multiple lines based on the line delimiters.
|
||
|
|
* @param {string} text Source code as a string.
|
||
|
|
* @returns {string[]} Array of source code lines.
|
||
|
|
* @public
|
||
|
|
*/
|
||
|
|
static splitLines(text) {
|
||
|
|
return text.split(astUtils.createGlobalLinebreakMatcher());
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gets the source code for the given node.
|
||
|
|
* @param {ASTNode} [node] The AST node to get the text for.
|
||
|
|
* @param {int} [beforeCount] The number of characters before the node to retrieve.
|
||
|
|
* @param {int} [afterCount] The number of characters after the node to retrieve.
|
||
|
|
* @returns {string} The text representing the AST node.
|
||
|
|
* @public
|
||
|
|
*/
|
||
|
|
getText(node, beforeCount, afterCount) {
|
||
|
|
if (node) {
|
||
|
|
return this.text.slice(Math.max(node.range[0] - (beforeCount || 0), 0),
|
||
|
|
node.range[1] + (afterCount || 0));
|
||
|
|
}
|
||
|
|
return this.text;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gets the entire source text split into an array of lines.
|
||
|
|
* @returns {Array} The source text as an array of lines.
|
||
|
|
* @public
|
||
|
|
*/
|
||
|
|
getLines() {
|
||
|
|
return this.lines;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Retrieves an array containing all comments in the source code.
|
||
|
|
* @returns {ASTNode[]} An array of comment nodes.
|
||
|
|
* @public
|
||
|
|
*/
|
||
|
|
getAllComments() {
|
||
|
|
return this.ast.comments;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gets all comments for the given node.
|
||
|
|
* @param {ASTNode} node The AST node to get the comments for.
|
||
|
|
* @returns {Object} An object containing a leading and trailing array
|
||
|
|
* of comments indexed by their position.
|
||
|
|
* @public
|
||
|
|
* @deprecated replaced by getCommentsBefore(), getCommentsAfter(), and getCommentsInside().
|
||
|
|
*/
|
||
|
|
getComments(node) {
|
||
|
|
if (this._commentCache.has(node)) {
|
||
|
|
return this._commentCache.get(node);
|
||
|
|
}
|
||
|
|
|
||
|
|
const comments = {
|
||
|
|
leading: [],
|
||
|
|
trailing: []
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Return all comments as leading comments of the Program node when
|
||
|
|
* there is no executable code.
|
||
|
|
*/
|
||
|
|
if (node.type === "Program") {
|
||
|
|
if (node.body.length === 0) {
|
||
|
|
comments.leading = node.comments;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Return comments as trailing comments of nodes that only contain
|
||
|
|
* comments (to mimic the comment attachment behavior present in Espree).
|
||
|
|
*/
|
||
|
|
if ((node.type === "BlockStatement" || node.type === "ClassBody") && node.body.length === 0 ||
|
||
|
|
node.type === "ObjectExpression" && node.properties.length === 0 ||
|
||
|
|
node.type === "ArrayExpression" && node.elements.length === 0 ||
|
||
|
|
node.type === "SwitchStatement" && node.cases.length === 0
|
||
|
|
) {
|
||
|
|
comments.trailing = this.getTokens(node, {
|
||
|
|
includeComments: true,
|
||
|
|
filter: isCommentToken
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Iterate over tokens before and after node and collect comment tokens.
|
||
|
|
* Do not include comments that exist outside of the parent node
|
||
|
|
* to avoid duplication.
|
||
|
|
*/
|
||
|
|
let currentToken = this.getTokenBefore(node, { includeComments: true });
|
||
|
|
|
||
|
|
while (currentToken && isCommentToken(currentToken)) {
|
||
|
|
if (node.parent && node.parent.type !== "Program" && (currentToken.start < node.parent.start)) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
comments.leading.push(currentToken);
|
||
|
|
currentToken = this.getTokenBefore(currentToken, { includeComments: true });
|
||
|
|
}
|
||
|
|
|
||
|
|
comments.leading.reverse();
|
||
|
|
|
||
|
|
currentToken = this.getTokenAfter(node, { includeComments: true });
|
||
|
|
|
||
|
|
while (currentToken && isCommentToken(currentToken)) {
|
||
|
|
if (node.parent && node.parent.type !== "Program" && (currentToken.end > node.parent.end)) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
comments.trailing.push(currentToken);
|
||
|
|
currentToken = this.getTokenAfter(currentToken, { includeComments: true });
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
this._commentCache.set(node, comments);
|
||
|
|
return comments;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Retrieves the JSDoc comment for a given node.
|
||
|
|
* @param {ASTNode} node The AST node to get the comment for.
|
||
|
|
* @returns {Token|null} The Block comment token containing the JSDoc comment
|
||
|
|
* for the given node or null if not found.
|
||
|
|
* @public
|
||
|
|
* @deprecated
|
||
|
|
*/
|
||
|
|
getJSDocComment(node) {
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks for the presence of a JSDoc comment for the given node and returns it.
|
||
|
|
* @param {ASTNode} astNode The AST node to get the comment for.
|
||
|
|
* @returns {Token|null} The Block comment token containing the JSDoc comment
|
||
|
|
* for the given node or null if not found.
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
const findJSDocComment = astNode => {
|
||
|
|
const tokenBefore = this.getTokenBefore(astNode, { includeComments: true });
|
||
|
|
|
||
|
|
if (
|
||
|
|
tokenBefore &&
|
||
|
|
isCommentToken(tokenBefore) &&
|
||
|
|
tokenBefore.type === "Block" &&
|
||
|
|
tokenBefore.value.charAt(0) === "*" &&
|
||
|
|
astNode.loc.start.line - tokenBefore.loc.end.line <= 1
|
||
|
|
) {
|
||
|
|
return tokenBefore;
|
||
|
|
}
|
||
|
|
|
||
|
|
return null;
|
||
|
|
};
|
||
|
|
let parent = node.parent;
|
||
|
|
|
||
|
|
switch (node.type) {
|
||
|
|
case "ClassDeclaration":
|
||
|
|
case "FunctionDeclaration":
|
||
|
|
return findJSDocComment(looksLikeExport(parent) ? parent : node);
|
||
|
|
|
||
|
|
case "ClassExpression":
|
||
|
|
return findJSDocComment(parent.parent);
|
||
|
|
|
||
|
|
case "ArrowFunctionExpression":
|
||
|
|
case "FunctionExpression":
|
||
|
|
if (parent.type !== "CallExpression" && parent.type !== "NewExpression") {
|
||
|
|
while (
|
||
|
|
!this.getCommentsBefore(parent).length &&
|
||
|
|
!/Function/u.test(parent.type) &&
|
||
|
|
parent.type !== "MethodDefinition" &&
|
||
|
|
parent.type !== "Property"
|
||
|
|
) {
|
||
|
|
parent = parent.parent;
|
||
|
|
|
||
|
|
if (!parent) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (parent && parent.type !== "FunctionDeclaration" && parent.type !== "Program") {
|
||
|
|
return findJSDocComment(parent);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return findJSDocComment(node);
|
||
|
|
|
||
|
|
// falls through
|
||
|
|
default:
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gets the deepest node containing a range index.
|
||
|
|
* @param {int} index Range index of the desired node.
|
||
|
|
* @returns {ASTNode} The node if found or null if not found.
|
||
|
|
* @public
|
||
|
|
*/
|
||
|
|
getNodeByRangeIndex(index) {
|
||
|
|
let result = null;
|
||
|
|
|
||
|
|
Traverser.traverse(this.ast, {
|
||
|
|
visitorKeys: this.visitorKeys,
|
||
|
|
enter(node) {
|
||
|
|
if (node.range[0] <= index && index < node.range[1]) {
|
||
|
|
result = node;
|
||
|
|
} else {
|
||
|
|
this.skip();
|
||
|
|
}
|
||
|
|
},
|
||
|
|
leave(node) {
|
||
|
|
if (node === result) {
|
||
|
|
this.break();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Determines if two nodes or tokens have at least one whitespace character
|
||
|
|
* between them. Order does not matter. Returns false if the given nodes or
|
||
|
|
* tokens overlap.
|
||
|
|
* @param {ASTNode|Token} first The first node or token to check between.
|
||
|
|
* @param {ASTNode|Token} second The second node or token to check between.
|
||
|
|
* @returns {boolean} True if there is a whitespace character between
|
||
|
|
* any of the tokens found between the two given nodes or tokens.
|
||
|
|
* @public
|
||
|
|
*/
|
||
|
|
isSpaceBetween(first, second) {
|
||
|
|
return isSpaceBetween(this, first, second, false);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Determines if two nodes or tokens have at least one whitespace character
|
||
|
|
* between them. Order does not matter. Returns false if the given nodes or
|
||
|
|
* tokens overlap.
|
||
|
|
* For backward compatibility, this method returns true if there are
|
||
|
|
* `JSXText` tokens that contain whitespaces between the two.
|
||
|
|
* @param {ASTNode|Token} first The first node or token to check between.
|
||
|
|
* @param {ASTNode|Token} second The second node or token to check between.
|
||
|
|
* @returns {boolean} True if there is a whitespace character between
|
||
|
|
* any of the tokens found between the two given nodes or tokens.
|
||
|
|
* @deprecated in favor of isSpaceBetween().
|
||
|
|
* @public
|
||
|
|
*/
|
||
|
|
isSpaceBetweenTokens(first, second) {
|
||
|
|
return isSpaceBetween(this, first, second, true);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Converts a source text index into a (line, column) pair.
|
||
|
|
* @param {number} index The index of a character in a file
|
||
|
|
* @throws {TypeError} If non-numeric index or index out of range.
|
||
|
|
* @returns {Object} A {line, column} location object with a 0-indexed column
|
||
|
|
* @public
|
||
|
|
*/
|
||
|
|
getLocFromIndex(index) {
|
||
|
|
if (typeof index !== "number") {
|
||
|
|
throw new TypeError("Expected `index` to be a number.");
|
||
|
|
}
|
||
|
|
|
||
|
|
if (index < 0 || index > this.text.length) {
|
||
|
|
throw new RangeError(`Index out of range (requested index ${index}, but source text has length ${this.text.length}).`);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* For an argument of this.text.length, return the location one "spot" past the last character
|
||
|
|
* of the file. If the last character is a linebreak, the location will be column 0 of the next
|
||
|
|
* line; otherwise, the location will be in the next column on the same line.
|
||
|
|
*
|
||
|
|
* See getIndexFromLoc for the motivation for this special case.
|
||
|
|
*/
|
||
|
|
if (index === this.text.length) {
|
||
|
|
return { line: this.lines.length, column: this.lines[this.lines.length - 1].length };
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* To figure out which line index is on, determine the last place at which index could
|
||
|
|
* be inserted into lineStartIndices to keep the list sorted.
|
||
|
|
*/
|
||
|
|
const lineNumber = index >= this.lineStartIndices[this.lineStartIndices.length - 1]
|
||
|
|
? this.lineStartIndices.length
|
||
|
|
: this.lineStartIndices.findIndex(el => index < el);
|
||
|
|
|
||
|
|
return { line: lineNumber, column: index - this.lineStartIndices[lineNumber - 1] };
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Converts a (line, column) pair into a range index.
|
||
|
|
* @param {Object} loc A line/column location
|
||
|
|
* @param {number} loc.line The line number of the location (1-indexed)
|
||
|
|
* @param {number} loc.column The column number of the location (0-indexed)
|
||
|
|
* @throws {TypeError|RangeError} If `loc` is not an object with a numeric
|
||
|
|
* `line` and `column`, if the `line` is less than or equal to zero or
|
||
|
|
* the line or column is out of the expected range.
|
||
|
|
* @returns {number} The range index of the location in the file.
|
||
|
|
* @public
|
||
|
|
*/
|
||
|
|
getIndexFromLoc(loc) {
|
||
|
|
if (typeof loc !== "object" || typeof loc.line !== "number" || typeof loc.column !== "number") {
|
||
|
|
throw new TypeError("Expected `loc` to be an object with numeric `line` and `column` properties.");
|
||
|
|
}
|
||
|
|
|
||
|
|
if (loc.line <= 0) {
|
||
|
|
throw new RangeError(`Line number out of range (line ${loc.line} requested). Line numbers should be 1-based.`);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (loc.line > this.lineStartIndices.length) {
|
||
|
|
throw new RangeError(`Line number out of range (line ${loc.line} requested, but only ${this.lineStartIndices.length} lines present).`);
|
||
|
|
}
|
||
|
|
|
||
|
|
const lineStartIndex = this.lineStartIndices[loc.line - 1];
|
||
|
|
const lineEndIndex = loc.line === this.lineStartIndices.length ? this.text.length : this.lineStartIndices[loc.line];
|
||
|
|
const positionIndex = lineStartIndex + loc.column;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* By design, getIndexFromLoc({ line: lineNum, column: 0 }) should return the start index of
|
||
|
|
* the given line, provided that the line number is valid element of this.lines. Since the
|
||
|
|
* last element of this.lines is an empty string for files with trailing newlines, add a
|
||
|
|
* special case where getting the index for the first location after the end of the file
|
||
|
|
* will return the length of the file, rather than throwing an error. This allows rules to
|
||
|
|
* use getIndexFromLoc consistently without worrying about edge cases at the end of a file.
|
||
|
|
*/
|
||
|
|
if (
|
||
|
|
loc.line === this.lineStartIndices.length && positionIndex > lineEndIndex ||
|
||
|
|
loc.line < this.lineStartIndices.length && positionIndex >= lineEndIndex
|
||
|
|
) {
|
||
|
|
throw new RangeError(`Column number out of range (column ${loc.column} requested, but the length of line ${loc.line} is ${lineEndIndex - lineStartIndex}).`);
|
||
|
|
}
|
||
|
|
|
||
|
|
return positionIndex;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gets the scope for the given node
|
||
|
|
* @param {ASTNode} currentNode The node to get the scope of
|
||
|
|
* @returns {eslint-scope.Scope} The scope information for this node
|
||
|
|
* @throws {TypeError} If the `currentNode` argument is missing.
|
||
|
|
*/
|
||
|
|
getScope(currentNode) {
|
||
|
|
|
||
|
|
if (!currentNode) {
|
||
|
|
throw new TypeError("Missing required argument: node.");
|
||
|
|
}
|
||
|
|
|
||
|
|
// check cache first
|
||
|
|
const cache = this[caches].get("scopes");
|
||
|
|
const cachedScope = cache.get(currentNode);
|
||
|
|
|
||
|
|
if (cachedScope) {
|
||
|
|
return cachedScope;
|
||
|
|
}
|
||
|
|
|
||
|
|
// On Program node, get the outermost scope to avoid return Node.js special function scope or ES modules scope.
|
||
|
|
const inner = currentNode.type !== "Program";
|
||
|
|
|
||
|
|
for (let node = currentNode; node; node = node.parent) {
|
||
|
|
const scope = this.scopeManager.acquire(node, inner);
|
||
|
|
|
||
|
|
if (scope) {
|
||
|
|
if (scope.type === "function-expression-name") {
|
||
|
|
cache.set(currentNode, scope.childScopes[0]);
|
||
|
|
return scope.childScopes[0];
|
||
|
|
}
|
||
|
|
|
||
|
|
cache.set(currentNode, scope);
|
||
|
|
return scope;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
cache.set(currentNode, this.scopeManager.scopes[0]);
|
||
|
|
return this.scopeManager.scopes[0];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Get the variables that `node` defines.
|
||
|
|
* This is a convenience method that passes through
|
||
|
|
* to the same method on the `scopeManager`.
|
||
|
|
* @param {ASTNode} node The node for which the variables are obtained.
|
||
|
|
* @returns {Array<Variable>} An array of variable nodes representing
|
||
|
|
* the variables that `node` defines.
|
||
|
|
*/
|
||
|
|
getDeclaredVariables(node) {
|
||
|
|
return this.scopeManager.getDeclaredVariables(node);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* eslint-disable class-methods-use-this -- node is owned by SourceCode */
|
||
|
|
/**
|
||
|
|
* Gets all the ancestors of a given node
|
||
|
|
* @param {ASTNode} node The node
|
||
|
|
* @returns {Array<ASTNode>} All the ancestor nodes in the AST, not including the provided node, starting
|
||
|
|
* from the root node at index 0 and going inwards to the parent node.
|
||
|
|
* @throws {TypeError} When `node` is missing.
|
||
|
|
*/
|
||
|
|
getAncestors(node) {
|
||
|
|
|
||
|
|
if (!node) {
|
||
|
|
throw new TypeError("Missing required argument: node.");
|
||
|
|
}
|
||
|
|
|
||
|
|
const ancestorsStartingAtParent = [];
|
||
|
|
|
||
|
|
for (let ancestor = node.parent; ancestor; ancestor = ancestor.parent) {
|
||
|
|
ancestorsStartingAtParent.push(ancestor);
|
||
|
|
}
|
||
|
|
|
||
|
|
return ancestorsStartingAtParent.reverse();
|
||
|
|
}
|
||
|
|
/* eslint-enable class-methods-use-this -- node is owned by SourceCode */
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Marks a variable as used in the current scope
|
||
|
|
* @param {string} name The name of the variable to mark as used.
|
||
|
|
* @param {ASTNode} [refNode] The closest node to the variable reference.
|
||
|
|
* @returns {boolean} True if the variable was found and marked as used, false if not.
|
||
|
|
*/
|
||
|
|
markVariableAsUsed(name, refNode = this.ast) {
|
||
|
|
|
||
|
|
const currentScope = this.getScope(refNode);
|
||
|
|
let initialScope = currentScope;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* When we are in an ESM or CommonJS module, we need to start searching
|
||
|
|
* from the top-level scope, not the global scope. For ESM the top-level
|
||
|
|
* scope is the module scope; for CommonJS the top-level scope is the
|
||
|
|
* outer function scope.
|
||
|
|
*
|
||
|
|
* Without this check, we might miss a variable declared with `var` at
|
||
|
|
* the top-level because it won't exist in the global scope.
|
||
|
|
*/
|
||
|
|
if (
|
||
|
|
currentScope.type === "global" &&
|
||
|
|
currentScope.childScopes.length > 0 &&
|
||
|
|
|
||
|
|
// top-level scopes refer to a `Program` node
|
||
|
|
currentScope.childScopes[0].block === this.ast
|
||
|
|
) {
|
||
|
|
initialScope = currentScope.childScopes[0];
|
||
|
|
}
|
||
|
|
|
||
|
|
for (let scope = initialScope; scope; scope = scope.upper) {
|
||
|
|
const variable = scope.variables.find(scopeVar => scopeVar.name === name);
|
||
|
|
|
||
|
|
if (variable) {
|
||
|
|
variable.eslintUsed = true;
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns an array of all inline configuration nodes found in the
|
||
|
|
* source code.
|
||
|
|
* @returns {Array<Token>} An array of all inline configuration nodes.
|
||
|
|
*/
|
||
|
|
getInlineConfigNodes() {
|
||
|
|
|
||
|
|
// check the cache first
|
||
|
|
let configNodes = this[caches].get("configNodes");
|
||
|
|
|
||
|
|
if (configNodes) {
|
||
|
|
return configNodes;
|
||
|
|
}
|
||
|
|
|
||
|
|
// calculate fresh config nodes
|
||
|
|
configNodes = this.ast.comments.filter(comment => {
|
||
|
|
|
||
|
|
// shebang comments are never directives
|
||
|
|
if (comment.type === "Shebang") {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
const { directivePart } = extractDirectiveComment(comment.value);
|
||
|
|
|
||
|
|
const directiveMatch = directivesPattern.exec(directivePart);
|
||
|
|
|
||
|
|
if (!directiveMatch) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
// only certain comment types are supported as line comments
|
||
|
|
return comment.type !== "Line" || !!/^eslint-disable-(next-)?line$/u.test(directiveMatch[1]);
|
||
|
|
});
|
||
|
|
|
||
|
|
this[caches].set("configNodes", configNodes);
|
||
|
|
|
||
|
|
return configNodes;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Applies language options sent in from the core.
|
||
|
|
* @param {Object} languageOptions The language options for this run.
|
||
|
|
* @returns {void}
|
||
|
|
*/
|
||
|
|
applyLanguageOptions(languageOptions) {
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Add configured globals and language globals
|
||
|
|
*
|
||
|
|
* Using Object.assign instead of object spread for performance reasons
|
||
|
|
* https://github.com/eslint/eslint/issues/16302
|
||
|
|
*/
|
||
|
|
const configGlobals = Object.assign(
|
||
|
|
{},
|
||
|
|
getGlobalsForEcmaVersion(languageOptions.ecmaVersion),
|
||
|
|
languageOptions.sourceType === "commonjs" ? globals.commonjs : void 0,
|
||
|
|
languageOptions.globals
|
||
|
|
);
|
||
|
|
const varsCache = this[caches].get("vars");
|
||
|
|
|
||
|
|
varsCache.set("configGlobals", configGlobals);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Applies configuration found inside of the source code. This method is only
|
||
|
|
* called when ESLint is running with inline configuration allowed.
|
||
|
|
* @returns {{problems:Array<Problem>,configs:{config:FlatConfigArray,node:ASTNode}}} Information
|
||
|
|
* that ESLint needs to further process the inline configuration.
|
||
|
|
*/
|
||
|
|
applyInlineConfig() {
|
||
|
|
|
||
|
|
const problems = [];
|
||
|
|
const configs = [];
|
||
|
|
const exportedVariables = {};
|
||
|
|
const inlineGlobals = Object.create(null);
|
||
|
|
|
||
|
|
this.getInlineConfigNodes().forEach(comment => {
|
||
|
|
|
||
|
|
const { directivePart } = extractDirectiveComment(comment.value);
|
||
|
|
const match = directivesPattern.exec(directivePart);
|
||
|
|
const directiveText = match[1];
|
||
|
|
const directiveValue = directivePart.slice(match.index + directiveText.length);
|
||
|
|
|
||
|
|
switch (directiveText) {
|
||
|
|
case "exported":
|
||
|
|
Object.assign(exportedVariables, commentParser.parseStringConfig(directiveValue, comment));
|
||
|
|
break;
|
||
|
|
|
||
|
|
case "globals":
|
||
|
|
case "global":
|
||
|
|
for (const [id, { value }] of Object.entries(commentParser.parseStringConfig(directiveValue, comment))) {
|
||
|
|
let normalizedValue;
|
||
|
|
|
||
|
|
try {
|
||
|
|
normalizedValue = normalizeConfigGlobal(value);
|
||
|
|
} catch (err) {
|
||
|
|
problems.push({
|
||
|
|
ruleId: null,
|
||
|
|
loc: comment.loc,
|
||
|
|
message: err.message
|
||
|
|
});
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (inlineGlobals[id]) {
|
||
|
|
inlineGlobals[id].comments.push(comment);
|
||
|
|
inlineGlobals[id].value = normalizedValue;
|
||
|
|
} else {
|
||
|
|
inlineGlobals[id] = {
|
||
|
|
comments: [comment],
|
||
|
|
value: normalizedValue
|
||
|
|
};
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case "eslint": {
|
||
|
|
const parseResult = commentParser.parseJsonConfig(directiveValue, comment.loc);
|
||
|
|
|
||
|
|
if (parseResult.success) {
|
||
|
|
configs.push({
|
||
|
|
config: {
|
||
|
|
rules: parseResult.config
|
||
|
|
},
|
||
|
|
node: comment
|
||
|
|
});
|
||
|
|
} else {
|
||
|
|
problems.push(parseResult.error);
|
||
|
|
}
|
||
|
|
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
// no default
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
// save all the new variables for later
|
||
|
|
const varsCache = this[caches].get("vars");
|
||
|
|
|
||
|
|
varsCache.set("inlineGlobals", inlineGlobals);
|
||
|
|
varsCache.set("exportedVariables", exportedVariables);
|
||
|
|
|
||
|
|
return {
|
||
|
|
configs,
|
||
|
|
problems
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Called by ESLint core to indicate that it has finished providing
|
||
|
|
* information. We now add in all the missing variables and ensure that
|
||
|
|
* state-changing methods cannot be called by rules.
|
||
|
|
* @returns {void}
|
||
|
|
*/
|
||
|
|
finalize() {
|
||
|
|
|
||
|
|
// Step 1: ensure that all of the necessary variables are up to date
|
||
|
|
const varsCache = this[caches].get("vars");
|
||
|
|
const globalScope = this.scopeManager.scopes[0];
|
||
|
|
const configGlobals = varsCache.get("configGlobals");
|
||
|
|
const inlineGlobals = varsCache.get("inlineGlobals");
|
||
|
|
const exportedVariables = varsCache.get("exportedVariables");
|
||
|
|
|
||
|
|
addDeclaredGlobals(globalScope, configGlobals, inlineGlobals);
|
||
|
|
|
||
|
|
if (exportedVariables) {
|
||
|
|
markExportedVariables(globalScope, exportedVariables);
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = SourceCode;
|