50 lines
1.4 KiB
JavaScript
50 lines
1.4 KiB
JavaScript
/**
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* @fileoverview Module for loading rules from files and directories.
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* @author Michael Ficarra
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*/
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"use strict";
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//------------------------------------------------------------------------------
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// Requirements
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//------------------------------------------------------------------------------
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const fs = require("fs"),
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path = require("path");
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const rulesDirCache = {};
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//------------------------------------------------------------------------------
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// Public Interface
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//------------------------------------------------------------------------------
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/**
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* Load all rule modules from specified directory.
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* @param {string} [rulesDir] Path to rules directory, may be relative. Defaults to `lib/rules`.
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* @param {string} cwd Current working directory
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* @returns {Object} Loaded rule modules by rule ids (file names).
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*/
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module.exports = function(rulesDir, cwd) {
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if (!rulesDir) {
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rulesDir = path.join(__dirname, "rules");
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} else {
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rulesDir = path.resolve(cwd, rulesDir);
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}
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// cache will help performance as IO operation are expensive
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if (rulesDirCache[rulesDir]) {
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return rulesDirCache[rulesDir];
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}
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const rules = Object.create(null);
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fs.readdirSync(rulesDir).forEach(file => {
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if (path.extname(file) !== ".js") {
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return;
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}
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rules[file.slice(0, -3)] = path.join(rulesDir, file);
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});
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rulesDirCache[rulesDir] = rules;
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return rules;
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};
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