lib/components/source.js
function populateStack(stack, rootPath, files, callback) {
  stack.unshift(...files
    .filter(file => file.stats.isDirectory())
    .map(file => path.join(rootPath, file.path)));
  async.nextTick(callback, null, files);
}
function populateStack(stack, rootPath, files, callback) {
  stack.unshift(...files
    .filter(file => file.stats.isDirectory())
    .map(file => path.join(rootPath, file.path)));
  async.nextTick(callback, null, files);
}
function populateStack ( stack , rootPath , files , callback ) { stack . unshift ( ... files . filter ( file => file . stats . isDirectory ( ) ) . map ( file => path . join ( rootPath , file . path ) ) ) ; async . nextTick ( callback , null , files ) ; }
Add subdirectories to the given stack.
Add subdirectories to the given stack .