bug#47012: xref copies keymap properties to minibuffer

[Dmitry Gutov]

On 25.03.2021 11:40, Juri Linkov wrote:
> Sharing regexp history between grep and project-find-regexp would be
> the most desirable.  How better to achieve this?

Either by using 'grep-regexp-history directly, or with either of the 
options below.

> Some commands already use variable *-history-variable, so adding
> project-regexp-history-variable wouldn't cause a new precedent.

Could you give an example?

And ideally, we should be also able to answer the question why some 
packages have their own variables, and others have "-variable variables".

If it's just historical reasons, as it often is, maybe

  (defvar project-regexp-history-variable 'grep-regexp-history)

will be good enough.

> Whereas using defalias is something new, maybe it could work too:
>
>    (defalias 'grep-regexp-history 'project-regexp-history)

Yup, that's what I meant. It does feel a bit hackish, though.

Another possible approach would be some categories based system, 
together with user customization, like completion-category-overrides, 
but it's probably overkill for this problem.