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/**
* @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} [rulesDir] 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(rulesDir, cwd) {
if (!rulesDir) {
rulesDir = path.join(__dirname, "rules");
} else {
rulesDir = path.resolve(cwd, rulesDir);
}
// 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;
};
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