Simple stylus plugin that uses Staticfy replace paths to replace static asset paths in compiled css

package.json

{
  "name": "stylus-staticify",
  "version": "0.1.0",
  "main": "stylus-staticify.js",
  "peerDependencies": {
    "staticify": "^3.0.0",
  }
}

stylus-staticify.js

/*
  Simple Stylus plugin that replaces paths with staticify paths.
*/
let staticify;
try {
 staticify = require('staticify');
} catch (err) {
  throw new Error('Staticify could not be found, please install it');
}
const DEFAULT_CONFIG_PATH = './config.staticify.js';

module.exports = function (opts)  {

  let config, configFilePath = DEFAULT_CONFIG_PATH;
  if ('configFile' in opts)
    configFilePath = opts.configFile;

  try {
    config = require(configFilePath);
  } catch (err) {
    throw new Error(
      'Staticify config file not found at '
      + configFilePath
      + ', please specifiy one');
    return;
  }

  if (!('root' in config) || !('options' in config))
    throw new Error('Staticify config file is not correctly defined, ensure it is exporting a root and options variable');

  const replacePaths = staticify(config.root, config.options).replacePaths;
  return function (style) {
    style.on('end', function (err, css) {
      return replacePaths(css)
    });
  }
}