I use the standard
grep command a lot. When I execute it, the minibuffer is populated with the following the text, allowing me to complete the command:
Run grep (like this): grep --color -nH --null -e
I almost always prefer to use Perl regex and ignore casing, so I'm finding myself replacing the last argument very often like so:
Run grep (like this): grep --color -nH --null -Pi
I would like to change the behavior of
grep so that it loads with the argument
-Pi instead of
-e by default.
When I use
describe-function and inspect
grep, I can see the lines (in
/usr/share/emacs/26.3/lisp/progmodes/grep.el.gz) that define this behavior. Beginning line 650, there is a codeblock like so:
(let ((grep-options (concat (if grep-use-null-device "-n" "-nH") (if grep-use-null-filename-separator " --null") (if (grep-probe grep-program `(nil nil nil "-e" "foo" ,null-device) nil 1) " -e")))) (...
How do I override these
grep-options in my Emacs config? I cannot find a variable named
grep-options which I could just overwrite, for example, so what's the best practice then?