Re: Let temporary minibuffer messages replace current minibuffer contents?

Michael Heerdegen via Users list for the GNU Emacs text editor wrote:

> Note that in your example - where an error occurs while a minibuffer is
> active - we are speaking about `command-error-function'.
> 
> `minibuffer-error-initialize' sets this variable to
> `minibuffer-error-function' locally in minibuffers, which still appends
> to the minibuffer contents AFAICT.  To get rid of that you probably have
> to replace `minibuffer-error-initialize' in `minibuffer-setup-hook' with
> something that you like.
For the moment I just use sth. very easy which allows me to show
only the error message for certain buffers, while it is still added
at the end for others:

(defun hide-minibuffer-prompt (m)
   (let ((inhibit-read-only t))
     (if (string-match "^\\(Find File:\\|Switch to buffer\\)" (minibuffer-prompt))
	(add-text-properties 1 (point-max) '(invisible t)))))

(defun show-minibuffer-prompt (m)
   (let ((inhibit-read-only t))
     (remove-text-properties 1 (point-max) '(invisible t))))

(advice-add 'minibuffer-message :before #'hide-minibuffer-prompt)
(advice-add 'minibuffer-message :after #'show-minibuffer-prompt)

That works fine for my specual use case...

cu,
Frank