Function mkdirp

javascript/selenium-webdriver/io/index.js:280–305

* Recursively creates a directory and any ancestors that do not yet exist. * * @param {string} dir The directory path to create. * @return {!Promise } A promise that will resolve with the path of the * created directory.

(dir)

 *     created directory.
 */
function mkdirp(dir) {
  return checkedCall((callback) => {
    fs.mkdir(dir, undefined, (err) => {
      if (!err) {
        callback(null, dir)
        return
      }

      switch (err.code) {
        case 'EEXIST':
          callback(null, dir)
          return
        case 'ENOENT':
          return mkdirp(path.dirname(dir))
            .then(() => mkdirp(dir))
            .then(
              () => callback(null, dir),
              (err) => callback(err),
            )
        default:
          callback(err)
          return
      }
    })
  })
}

/**
 * Recursively walks a directory, returning a promise that will resolve with