bug#57884: [PATCH] Flymake backend using the shellcheck program

[Eli Zaretskii]

> From: Augusto Stoffel <arstoffel@gmail.com>
> Cc: 57884@debbugs.gnu.org
> Date: Sat, 17 Sep 2022 19:32:44 +0200
> 
> > Also, wouldn't it be better to have separate user options for the
> > program and the switches?  That way, there won't be a need to require
> > users to provide a list as the value of the option.
> 
> I could split this into two defcustoms if you feel strongly about it,
> but it seems a bit of overengineering to me.  Not many people will want
> to customize the program name, and the switches would have to be
> provided as a list anyway, since we're not going to call this through a
> shell.
> 
> Let me know what you think.

If we don't expect users to customize this, maybe this shouldn't be a
defcustom at all?  If and when we learn about an alternative program,
we could at that time decide how best to allow its customization.  For
example, if both programs don't need any command-line switches, we
could offer a defcustom only for the program.

Anyway, let's hear what Lars and others think.