149 lines
3.4 KiB
JavaScript
Executable File
149 lines
3.4 KiB
JavaScript
Executable File
/**
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* @fileoverview Disallow mixed spaces and tabs for indentation
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* @author Jary Niebur
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* @deprecated in ESLint v8.53.0
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*/
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"use strict";
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//------------------------------------------------------------------------------
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// Rule Definition
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//------------------------------------------------------------------------------
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/** @type {import('../types').Rule.RuleModule} */
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module.exports = {
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meta: {
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deprecated: {
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message: "Formatting rules are being moved out of ESLint core.",
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url: "https://eslint.org/blog/2023/10/deprecating-formatting-rules/",
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deprecatedSince: "8.53.0",
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availableUntil: "10.0.0",
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replacedBy: [
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{
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message:
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"ESLint Stylistic now maintains deprecated stylistic core rules.",
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url: "https://eslint.style/guide/migration",
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plugin: {
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name: "@stylistic/eslint-plugin",
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url: "https://eslint.style",
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},
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rule: {
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name: "no-mixed-spaces-and-tabs",
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url: "https://eslint.style/rules/no-mixed-spaces-and-tabs",
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},
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},
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],
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},
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type: "layout",
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docs: {
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description: "Disallow mixed spaces and tabs for indentation",
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recommended: false,
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url: "https://eslint.org/docs/latest/rules/no-mixed-spaces-and-tabs",
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},
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schema: [
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{
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enum: ["smart-tabs", true, false],
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},
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],
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messages: {
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mixedSpacesAndTabs: "Mixed spaces and tabs.",
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},
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},
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create(context) {
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const sourceCode = context.sourceCode;
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let smartTabs;
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switch (context.options[0]) {
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case true: // Support old syntax, maybe add deprecation warning here
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case "smart-tabs":
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smartTabs = true;
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break;
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default:
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smartTabs = false;
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}
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//--------------------------------------------------------------------------
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// Public
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//--------------------------------------------------------------------------
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return {
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"Program:exit"(node) {
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const lines = sourceCode.lines,
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comments = sourceCode.getAllComments(),
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ignoredCommentLines = new Set();
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// Add all lines except the first ones.
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comments.forEach(comment => {
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for (
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let i = comment.loc.start.line + 1;
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i <= comment.loc.end.line;
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i++
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) {
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ignoredCommentLines.add(i);
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}
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});
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/*
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* At least one space followed by a tab
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* or the reverse before non-tab/-space
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* characters begin.
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*/
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let regex = /^(?=( +|\t+))\1(?:\t| )/u;
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if (smartTabs) {
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/*
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* At least one space followed by a tab
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* before non-tab/-space characters begin.
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*/
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// eslint-disable-next-line regexp/no-empty-lookarounds-assertion -- False positive
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regex = /^(?=(\t*))\1(?=( +))\2\t/u;
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}
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lines.forEach((line, i) => {
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const match = regex.exec(line);
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if (match) {
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const lineNumber = i + 1;
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const loc = {
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start: {
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line: lineNumber,
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column: match[0].length - 2,
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},
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end: {
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line: lineNumber,
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column: match[0].length,
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},
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};
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if (!ignoredCommentLines.has(lineNumber)) {
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const containingNode =
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sourceCode.getNodeByRangeIndex(
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sourceCode.getIndexFromLoc(loc.start),
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);
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if (
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!(
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containingNode &&
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["Literal", "TemplateElement"].includes(
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containingNode.type,
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)
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)
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) {
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context.report({
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node,
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loc,
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messageId: "mixedSpacesAndTabs",
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});
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}
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}
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}
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});
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},
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};
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},
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};
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