@Stefan とのコメント ディスカッションに基づいて、2 つの可能な (テストされていない) 解決策を次に示します。
使用let
:
(defun save-buffer-without-dtw ()
(interactive)
(let ((b (current-buffer))) ; memorize the buffer
(with-temp-buffer ; new temp buffer to bind the global value of before-save-hook
(let ((before-save-hook (remove 'delete-trailing-whitespace before-save-hook)))
(with-current-buffer b ; go back to the current buffer, before-save-hook is now buffer-local
(let ((before-save-hook (remove 'delete-trailing-whitespace before-save-hook)))
(save-buffer)))))))
使用unwind-protect
:
(defun save-buffer-without-dtw ()
(interactive)
(let ((restore-global
(memq 'delete-trailing-whitespace (default-value before-save-hook)))
(restore-local
(and (local-variable-p 'before-save-hook)
(memq 'delete-trailing-whitespace before-save-hook))))
(unwind-protect
(progn
(when restore-global
(remove-hook 'before-save-hook 'delete-trailing-whitespace))
(when restore-local
(remove-hook 'before-save-hook 'delete-trailing-whitespace t))
(save-buffer))
(when restore-global
(add-hook 'before-save-hook 'delete-trailing-whitespace))
(when restore-local
(add-hook 'before-save-hook 'delete-trailing-whitespace nil t)))))
2 番目のソリューションの問題は、 内の関数の順序before-save-hook
が変わる可能性があることです。