RE: grep-command: Ignore case if case-fold-search is non-nil

[Tino Calancha]

On Sun, 18 Sep 2016, Drew Adams wrote:

> > Do you think `grep-compute-defaults' should add '-i', i.e., ignore case,
> > in the default `grep-command' when `case-fold-search' is non-nil?
>
> No.
>
> Just because you might want to search the current buffer
> case-(in)sensitively, that in no way implies that you want to
> search a set of files somewhere the same way.
>
> `grep' is an external command.  It is not about acting (e.g.,
> searching) buffers within Emacs.
Ok, let me change my question.

Should `grep' family of commands in Emacs pass '-i' as default,
regardless of the `case-fold-search' value in current buffer,
if the user didn't customize `grep-command'?