Method writeRef

src/managers/GitRefManager.js:179–187

({ fs, gitdir, ref, value })

   */
  // TODO: make this less crude?
  static async writeRef({ fs, gitdir, ref, value }) {
    // Validate input
    if (!value.match(/[0-9a-f]{40}/)) {
      throw new InvalidOidError(value)
    }
    await acquireLock(ref, async () =>
      fs.write(join(gitdir, ref), `${value.trim()}\n`, 'utf8')
    )
  }

  /**
   * Writes a symbolic ref to the file system.