lux-framework/src/packages/fs/utils/exists.js

Build scalable, Node.js-powered REST APIs with almost no code.

// @flow
import { stat, readdir } from '../index';

/**
 * @private
 */
export default async function exists(
  path: string | RegExp,
  dir?: string
): Promise<boolean> {
  if (path instanceof RegExp) {
    const pattern = path;
    let files = [];

    if (dir) {
      files = await readdir(dir);
    }

    return files.some(file => pattern.test(file));
  }

  return stat(path).then(
    () => true,
    () => false
  );
}