How do I hide dotfiles only in the home directory in dired buffers?

Question

I would like to hide dotfiles only in the home directory in dired buffers, but I do not know how to achieve this. I have been trying with the following:

(use-package dired
  :ensure nil
  :commands (dired dired-jump)
  :bind (("C-x C-j" . dired-jump)
         (:map dired-mode-map ("C-c h" . dired-omit-mode)))
  :config
  (setq dired-omit-files (rx (seq bol "."))) ; hide dotfiles in dired-omit-mode

  (defun najjt/dired-after-readin ()
    "Turn on dired-omit-mode if current buffer is a dired buffer in the home directory."
    (if (string-equal (buffer-name) "najjt") ; check if current buffer name is equal to name of home dir
        (dired-omit-mode 1)
      (dired-omit-mode nil)))

  :hook ((dired-after-readin . (lambda () (najjt/dired-after-readin))))
  )

But it seems to hide dotfiles in all directories, not just my home directory.

Answer 1

Instead of bothering with using dired-omit-mode to hide dot files, just use the ls switches that give you that behavior (pretty much anything other than switch -a).

And do that only in a particular directory (e.g., your home directory) by using a .dir-locals-file that specifies the specific value of dired-listing-switches that gives you the behavior you want.

(.dir-locals-file is the default value of variable dir-locals-file. See (elisp) Directory Local Variables.)

Answer 2

Here's an approach that I like for its simplicity.

(defalias 'hide-dot-files
    (kmacro "% m ^ \\ . <return> k")
    "Hide dot files (files that start with a dot (.))

  For example, a list like this:

    .bashrc
    bookmarks.html

  is converted to this simpler list:

    bookmarks.html")

(keymap-global-set "C-c 1" #'hide-dot-files)

It uses dired's dired-mark-files-regexp command, bound in my system to the key combinations % m and * %, to identify lines that start with a dot and kill them. That doesn't delete the files. It just removes them from the dired listing. They can be restored with another dired command, revert-buffer, bound to the key g in my system.

I like this approach better than changing the flags to systems ls command, which I have set to -alhb, replacing the default value -al. It's not hard to change them, but for me it's a minor nuisance.