.config/coc/extensions/node_modules/coc-prettier/node_modules/eslint/lib/rules/linebreak-style.js

   1 /**
   2  * @fileoverview Rule to enforce a single linebreak style.
   3  * @author Erik Mueller
   4  */
   5
   6 "use strict";
   7
   8 //------------------------------------------------------------------------------
   9 // Requirements
  10 //------------------------------------------------------------------------------
  11
  12 const astUtils = require("./utils/ast-utils");
  13
  14 //------------------------------------------------------------------------------
  15 // Rule Definition
  16 //------------------------------------------------------------------------------
  17
  18 module.exports = {
  19     meta: {
  20         type: "layout",
  21
  22         docs: {
  23             description: "enforce consistent linebreak style",
  24             category: "Stylistic Issues",
  25             recommended: false,
  26             url: "https://eslint.org/docs/rules/linebreak-style"
  27         },
  28
  29         fixable: "whitespace",
  30
  31         schema: [
  32             {
  33                 enum: ["unix", "windows"]
  34             }
  35         ],
  36         messages: {
  37             expectedLF: "Expected linebreaks to be 'LF' but found 'CRLF'.",
  38             expectedCRLF: "Expected linebreaks to be 'CRLF' but found 'LF'."
  39         }
  40     },
  41
  42     create(context) {
  43         const sourceCode = context.getSourceCode();
  44
  45         //--------------------------------------------------------------------------
  46         // Helpers
  47         //--------------------------------------------------------------------------
  48
  49         /**
  50          * Builds a fix function that replaces text at the specified range in the source text.
  51          * @param {int[]} range The range to replace
  52          * @param {string} text The text to insert.
  53          * @returns {Function} Fixer function
  54          * @private
  55          */
  56         function createFix(range, text) {
  57             return function(fixer) {
  58                 return fixer.replaceTextRange(range, text);
  59             };
  60         }
  61
  62         //--------------------------------------------------------------------------
  63         // Public
  64         //--------------------------------------------------------------------------
  65
  66         return {
  67             Program: function checkForLinebreakStyle(node) {
  68                 const linebreakStyle = context.options[0] || "unix",
  69                     expectedLF = linebreakStyle === "unix",
  70                     expectedLFChars = expectedLF ? "\n" : "\r\n",
  71                     source = sourceCode.getText(),
  72                     pattern = astUtils.createGlobalLinebreakMatcher();
  73                 let match;
  74
  75                 let i = 0;
  76
  77                 while ((match = pattern.exec(source)) !== null) {
  78                     i++;
  79                     if (match[0] === expectedLFChars) {
  80                         continue;
  81                     }
  82
  83                     const index = match.index;
  84                     const range = [index, index + match[0].length];
  85
  86                     context.report({
  87                         node,
  88                         loc: {
  89                             start: {
  90                                 line: i,
  91                                 column: sourceCode.lines[i - 1].length
  92                             },
  93                             end: {
  94                                 line: i + 1,
  95                                 column: 0
  96                             }
  97                         },
  98                         messageId: expectedLF ? "expectedLF" : "expectedCRLF",
  99                         fix: createFix(range, expectedLFChars)
 100                     });
 101                 }
 102             }
 103         };
 104     }
 105 };