canonical/node_modules/css-lint/lib/rules.js

Canonical code style linter and formatter for JavaScript, SCSS, CSS and JSON.

'use strict';

var merge = require('merge'),
    path = require('path'),
    fs = require('fs');

var searchArray = function (haystack, needle) {
  var i;
  for (i = 0; i < haystack.length; i++) {
    if (haystack[i].indexOf(needle) >= 0) {
      return i;
    }
  }
  return -1;
};

module.exports = function (config) {
  var handlers = [],
      i,
      rules;

  rules = fs.readdirSync(path.join(__dirname, 'rules'));
  for (i = 0; i < rules.length; i++) {
    rules[i] = path.join(__dirname, 'rules', rules[i]);
  }

  Object.keys(config.rules).forEach(function (rule) {
    var fullRule = config.rules[rule],
        loadRule,
        options,
        ruleSearch;
    // Only seek out rules that are enabled
    if ((typeof fullRule === 'number' && fullRule !== 0) || (typeof fullRule === 'object' && fullRule[0] !== 0)) {
      ruleSearch = searchArray(rules, rule);
      if (ruleSearch >= 0) {
        loadRule = require(rules[ruleSearch]);

        options = typeof fullRule === 'object' ? fullRule[1] : {};

        options = merge.recursive(true, loadRule.defaults, options);

        handlers.push({
          'rule': loadRule,
          'severity': typeof fullRule === 'number' ? fullRule : fullRule[0],
          'options': options
        });
      }
      else {
        throw new Error('Rule `' + rule + '` could not be found!');
      }
    }
  });

  return handlers;
};