删除emacs中的主要模式键绑定

Question

I installed a new major mode (sunrise commander), and I want to reset all its predefined key bindings. Although I can use

(add-hook 'sr-mode-hook
    '(lambda ()
    (define-key sr-mode-map "KEY"        nil)
    ...
))

this mode have so many bindings, it's a tag tedious to my taste.

Is there a way to completely reset the key bindings of this major mode in a one-liner or few-liners?

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EDIT #1: I tried using these methods as described below:

(eval-after-load "sunrise"
  '(setq sr-mode-map (make-sparse-keymap)))

OR

(add-hook 'sr-mode-hook
    (lambda ()
    (setq sr-mode-map (make-sparse-keymap))))

Sadly, neither of them seems to work.

Do I actually need to define a new, empty keymap? Eg using

(defvar sunrise-keys-mode-map (make-keymap) "sunrise-keys-mode keymap.")
(define-minor-mode sunrise-keys-mode
  "A minor mode so that my key settings override sunrise major mode keymap."
  t " my-keys" 'sunrise-keys-mode-map)
(sunrise-keys-mode 1)
(eval-after-load "sunrise" ;; Fix this line to include the correct library name
  '(setq sr-mode-map (sunrise-keys-mode)))

---

EDIT #2: After a bit of tinkering in the sunrise commander code, I noticed that the sr-mode-map is based on the dired mode map. I disabled both, and it worked perfectly.

(eval-after-load "sunrise-commander"
  '(setq sr-mode-map (make-sparse-keymap)
         dired-mode-map (make-sparse-keymap)))

For future reference - the above is the only code needed. make-sparse-keymap is a function that returns an empty keymap (unless provided with an argument, apparently).

Answer 1

You cound bind sr-mode-map to a newly-created, empty keymap:

(setq sr-mode-map (make-sparse-keymap))

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You might need to delay this until after sunrise commander is loaded:

(eval-after-load "sc" ;; Fix this line to include the correct library name
  '(setq sr-mode-map (make-sparse-keymap)))