text: import path from 'path';
  import replace from 'replace';
  import Promise from 'bluebird';
  import watch from './lib/watch';
  
  /**
   * Copies static files such as robots.txt, favicon.ico to the
   * output (build) folder.
   */
  async function copy() {
    const ncp = Promise.promisify(require('ncp'));
  
    await Promise.all([
      ncp('src/app/public', 'build/public'),
      ncp('package.json', 'build/package.json'),
    ]);
  
    replace({
      regex: '"start".*',
      replacement: '"start": "node server.js"',
      paths: ['build/package.json'],
      recursive: false,
      silent: false,
    });
  
    if (global.WATCH) {
      const watcher = await watch('src/content/**/*.*');
      watcher.on('changed', async (file) => {
        const relPath = file.substr(path.join(__dirname, '../src/content/').length);
        await ncp(`src/content/${relPath}`, `build/content/${relPath}`);
      });
    }
  }
  
  export default copy;
  