apply prettier-eslint formatting on files found via glob

prettier-glob.js

'use strict';

// node core modules
const fs = require('fs');
const path = require('path');

// 3rd party modules
const glob = require('glob');
const format = require('prettier-eslint');

// internal modules

// this means you cann call invoke this via `node prettier-glob.js <my-custom-glob>`
const [, , globPattern = 'lib/**/*.js'] = process.argv;
glob(globPattern, {}, (globError, files) => {
  if (globError) {
    throw globError;
  }

  files
    .map(item => path.resolve(item))
    .forEach(filePath => fs.writeFileSync(filePath, format({ filePath })));
});