;; TODO: I do not know how to efficiently implement this.  The only
  ;; way that I can think of right now is to call "pijul ls" to find
  ;; all tracked files and then for each of them call "pijul diff" to
  ;; obtain the status information separately, and finally to list all
  ;; untracked files.  Needless to say this is inefficient.
  ;;
  ;; Perhaps I shall open a discussion for pijul to enrich the
  ;; functionalities of "pijul ls" to be closer to what "git ls-files"
  ;; does.

  ;; REVIEW: I do not know if this is really robust and correct.  More
  ;; tests in need.