eslint/lib/rules/no-path-concat.js

   1 /**
   2  * @fileoverview Disallow string concatenation when using __dirname and __filename
   3  * @author Nicholas C. Zakas
   4  */
   5 "use strict";
   6
   7 //------------------------------------------------------------------------------
   8 // Rule Definition
   9 //------------------------------------------------------------------------------
  10
  11 module.exports = {
  12     meta: {
  13         deprecated: true,
  14
  15         replacedBy: ["node/no-path-concat"],
  16
  17         type: "suggestion",
  18
  19         docs: {
  20             description: "disallow string concatenation with `__dirname` and `__filename`",
  21             category: "Node.js and CommonJS",
  22             recommended: false,
  23             url: "https://eslint.org/docs/rules/no-path-concat"
  24         },
  25
  26         schema: [],
  27
  28         messages: {
  29             usePathFunctions: "Use path.join() or path.resolve() instead of + to create paths."
  30         }
  31     },
  32
  33     create(context) {
  34
  35         const MATCHER = /^__(?:dir|file)name$/u;
  36
  37         //--------------------------------------------------------------------------
  38         // Public
  39         //--------------------------------------------------------------------------
  40
  41         return {
  42
  43             BinaryExpression(node) {
  44
  45                 const left = node.left,
  46                     right = node.right;
  47
  48                 if (node.operator === "+" &&
  49                         ((left.type === "Identifier" && MATCHER.test(left.name)) ||
  50                         (right.type === "Identifier" && MATCHER.test(right.name)))
  51                 ) {
  52
  53                     context.report({
  54                         node,
  55                         messageId: "usePathFunctions"
  56                     });
  57                 }
  58             }
  59
  60         };
  61
  62     }
  63 };