Blame view

node_modules/eslint/lib/load-rules.js 1.43 KB
ce4c83ff   wxy   初始提交
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
  /**
   * @fileoverview Module for loading rules from files and directories.
   * @author Michael Ficarra
   */
  
  "use strict";
  
  //------------------------------------------------------------------------------
  // Requirements
  //------------------------------------------------------------------------------
  
  const fs = require("fs"),
      path = require("path");
  
  const rulesDirCache = {};
  
  //------------------------------------------------------------------------------
  // Public Interface
  //------------------------------------------------------------------------------
  
  /**
   * Load all rule modules from specified directory.
   * @param {string} [relativeRulesDir] Path to rules directory, may be relative. Defaults to `lib/rules`.
   * @param {string} cwd Current working directory
   * @returns {Object} Loaded rule modules by rule ids (file names).
   */
  module.exports = function(relativeRulesDir, cwd) {
  
      const rulesDir = relativeRulesDir
          ? path.resolve(cwd, relativeRulesDir)
          : path.join(__dirname, "rules");
  
      // cache will help performance as IO operation are expensive
      if (rulesDirCache[rulesDir]) {
          return rulesDirCache[rulesDir];
      }
  
      const rules = Object.create(null);
  
      fs.readdirSync(rulesDir).forEach(file => {
          if (path.extname(file) !== ".js") {
              return;
          }
          rules[file.slice(0, -3)] = path.join(rulesDir, file);
      });
      rulesDirCache[rulesDir] = rules;
  
      return rules;
  };