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/**
* @fileoverview Rule to enforce a single linebreak style.
* @author Erik Mueller
* @deprecated in ESLint v8.53.0
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const astUtils = require("./utils/ast-utils");
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
/** @type {import('../types').Rule.RuleModule} */
module.exports = {
meta: {
deprecated: {
message: "Formatting rules are being moved out of ESLint core.",
url: "https://eslint.org/blog/2023/10/deprecating-formatting-rules/",
deprecatedSince: "8.53.0",
availableUntil: "10.0.0",
replacedBy: [
{
message:
"ESLint Stylistic now maintains deprecated stylistic core rules.",
url: "https://eslint.style/guide/migration",
plugin: {
name: "@stylistic/eslint-plugin-js",
url: "https://eslint.style/packages/js",
},
rule: {
name: "linebreak-style",
url: "https://eslint.style/rules/js/linebreak-style",
},
},
],
},
type: "layout",
docs: {
description: "Enforce consistent linebreak style",
recommended: false,
url: "https://eslint.org/docs/latest/rules/linebreak-style",
},
fixable: "whitespace",
schema: [
{
enum: ["unix", "windows"],
},
],
messages: {
expectedLF: "Expected linebreaks to be 'LF' but found 'CRLF'.",
expectedCRLF: "Expected linebreaks to be 'CRLF' but found 'LF'.",
},
},
create(context) {
const sourceCode = context.sourceCode;
//--------------------------------------------------------------------------
// Helpers
//--------------------------------------------------------------------------
/**
* Builds a fix function that replaces text at the specified range in the source text.
* @param {int[]} range The range to replace
* @param {string} text The text to insert.
* @returns {Function} Fixer function
* @private
*/
function createFix(range, text) {
return function (fixer) {
return fixer.replaceTextRange(range, text);
};
}
//--------------------------------------------------------------------------
// Public
//--------------------------------------------------------------------------
return {
Program: function checkForLinebreakStyle(node) {
const linebreakStyle = context.options[0] || "unix",
expectedLF = linebreakStyle === "unix",
expectedLFChars = expectedLF ? "\n" : "\r\n",
source = sourceCode.getText(),
pattern = astUtils.createGlobalLinebreakMatcher();
let match;
let i = 0;
while ((match = pattern.exec(source)) !== null) {
i++;
if (match[0] === expectedLFChars) {
continue;
}
const index = match.index;
const range = [index, index + match[0].length];
context.report({
node,
loc: {
start: {
line: i,
column: sourceCode.lines[i - 1].length,
},
end: {
line: i + 1,
column: 0,
},
},
messageId: expectedLF ? "expectedLF" : "expectedCRLF",
fix: createFix(range, expectedLFChars),
});
}
},
};
},
};