function getSelection () {
  return Application('Finder')
    .selection()
    .map(item => urlToPath(item.url()))
    .join('\n')
}

function getPath () {
  const windows = Application('Finder').windows()
  if (!windows.length) {
    throw new Error('No Finder windows open')
  } else {
    return urlToPath(windows[0].target().url())
  }
}

function urlToPath (url) {
  if (!url.startsWith('file://')) {
    throw new Error(`Unexpected URL scheme: ${url}`)
  }
  return $.NSURL.alloc.initWithString($(url)).fileSystemRepresentation
}