Üst dizin mutlak yolunu döndüren işlev

    (parent-dir "/home/sk/parent/ab.el")

verir

    "/home/sk/parent"

sonra,

(parent-dir "/home/sk/parent")

verir

"/home/sk"

Herhangi bir elisp işlevi parent-dirhem dosya yolu hem de dir yolu için taban yolu verir mi?

file-name-directory ne istersen yapar.

Ancak, (file-name-directory "/home/sk/parent/")(sondaki eğik çizgi ile), üst dizinini değil aynı dizini döndürür.

Gerçekten istediğini tahmin ediyorum :

(file-name-directory (directory-file-name "/home/sk/parent/ab.el")) ; => "/home/sk/parent/"
(file-name-directory (directory-file-name "/home/sk/parent/")) ; => "/home/sk/"
(file-name-directory (directory-file-name "/home/sk/parent")) ; => "/home/sk/"

Ve kütüphane Dired + bu işlevi kullanır:

(defun diredp-parent-dir (file &optional relativep)
  "Return the parent directory of FILE, or nil if none.
Optional arg RELATIVEP non-nil means return a relative name, that is,
just the parent component."
  (let ((parent  (file-name-directory (directory-file-name (expand-file-name file))))
        relparent)
    (when relativep
      (setq relparent  (file-name-nondirectory (directory-file-name parent))))
    (and (not (equal parent file))  (or relparent  parent))))

(defun parent-directory (dir)
  (unless (equal "/" dir)
    (file-name-directory (directory-file-name dir))))

Alındığı https://stackoverflow.com/a/14096693/5103881