linux - 将 "ls"从 emacs dired 更改为其他应用程序

Question

我在 elisp 中编写了一些脚本，它合并了 ls -l 和 du (显示真实文件夹大小而不是 ls 中写入的内容)。我把它命名为lsd。这是屏幕截图:

/image/x89K2.png

现在我将列出实现。我不是一个好的编码员，所以我会很感激任何有关错误和可以做得更好的事情的信息。

lsd.el

#!/usr/bin/emacs --script
(progn
  (setq argz command-line-args-left)
  (setq folder "./")
  (while argz
    ;; (message (car argz))
    (if (/= ?- (aref (car argz) 0))
      (setq folder (car argz)))
    (setq argz (cdr argz)))
  (if (/= ?/ (aref folder (1- (length folder)))) (setq folder (concat folder "/")))
  (switch-to-buffer " *lsd*")
  (erase-buffer)
  (shell-command (concat "ls -l -h --color=always " " " (apply 'concat (mapcar '(lambda(arg) (concat arg " ")) command-line-args-left))) (current-buffer))
  (switch-to-buffer " *du*")
  (erase-buffer)
  (shell-command (concat "du -h -d 1 " folder) (current-buffer))
  (goto-char 1)
  (while (search-forward "Permission denied" (point-max) t nil)
    (goto-char (point-at-bol))
    (let ((beg (point)))
      (forward-line)
      (delete-region beg (point)))) ; Remove all permission denied lines, thus show only permitted size.
  (goto-char 1)
  (while (and (search-forward folder (point-max) t nil) (/= (point-max) (1+ (point-at-eol)))) ; we do not need last line(the folder itself), so this line is something complex.
    (setq DIR (buffer-substring (point) (point-at-eol)))
    (goto-char (point-at-bol))
    (setq SIZE (buffer-substring (point) (1- (search-forward "  " (point-at-eol) nil nil))))
    (goto-char (point-at-eol))
    (switch-to-buffer " *lsd*")
    (goto-char 1)
    (if (search-forward DIR (point-max) t nil)
      (progn
        (goto-char (point-at-bol))
        (search-forward-regexp "[0-9]+" (point-at-eol) nil nil)
        (search-forward-regexp "  *[0-9]+[^ \n]*[ \n]*" (point-at-eol) nil nil)
        ;; If ls have options, that makes some numbers before size column - we are doomed. (-s, for example)
        (setq SIZE (concat SIZE " "))
        (while (< (length SIZE) (length (match-string 0))) (setq SIZE (concat " " SIZE)))
        (replace-match SIZE)))
    (switch-to-buffer " *du*"))
  (switch-to-buffer " *lsd*")
  (message "%s" (buffer-substring (point-min) (point-max)))
  (defun error(&rest args) args)
  (defun message(&rest args) args)) ; Do not show any messages.

LSD (我制作这个脚本来启动emacs，除了脚本之外不加载任何东西。如果可以更容易地完成，请指出这一点)

#/bin/bash
emacs -Q --script /usr/local/bin/lsd.el $@

问题来了:如何在 dired 中使用这个 lsd？

我可以更改 dired 中的某些内容以使用 lsd 而不是 ls 吗？

我可以重命名oldls中的ls，并制作一些ls bash脚本，如果没有--lsd标志，则将所有参数传递给ls，如果--lsd在这里，则将所有参数传递给lsd？

这是个好主意吗？

Answer 1

在 Emacs24 中还有 `insert-directory-program'设置 ls 可执行文件。放置

(setq 插入目录程序“/usr/local/bin/lsd”)

(相应地调整路径)在 .emacs 或 init.el 中，并且 dired 会采用您的 lsd 脚本。