| /** |
| * @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. |
| * @param {string} cwd Current working directory |
| * @returns {Object} Loaded rule modules. |
| */ |
| module.exports = function(relativeRulesDir, cwd) { |
| const rulesDir = path.resolve(cwd, relativeRulesDir); |
| |
| // 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)] = require(path.join(rulesDir, file)); |
| }); |
| rulesDirCache[rulesDir] = rules; |
| |
| return rules; |
| }; |