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

[Tino Calancha <tino.calancha@gmail.com>]

On Sun, 18 Sep 2016, Eli Zaretskii wrote:

>> From: Tino Calancha <tino.calancha@gmail.com>
>> Date: Sun, 18 Sep 2016 18:31:03 +0900 (JST)
>> Cc: tino.calancha@gmail.com
>>
>> 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?
>
> case-fold-search defaults to non-nil, so this would make "M-x grep"
> case-insensitive for many users.  I'm not sure they will like it.
case-insensitive searches is a great default: it maximize the search 
space, no worries to missing a match.

> More generally, it is not clear to me that a the connection between
> the buffer from which "M-x grep" is invoked and the search is strong
> enough to make the Grep search "inherit" the case-sensitivity of
> buffer searches.
It's not totally clear to me either, but it's not lacking of some logic;
and if one user want 100% control s?he can customize `grep-command':  I do
it in order to pass the flag -I.  I prefer to ignore the binary files.