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I set an explicit file to customization created via the UI. It's named custom.el. Currently, I use the followed snippets to create this file if not exist.
(defconst custom-file (expand-file-name "custom.el" user-emacs-directory))
(unless (file-exists-p custom-file)
(shell-command (concat "touch " custom-file)))
There is an ugly shell-command touch in, any other elisp functions can do this?
You can use
(write-region "" nil custom-file)not sure that is the ideal solution.