bug#18132: Time for a smarter dired-guess-shell-alist-default? (dired-x.el)

[Eli Zaretskii]

> From: Reuben Thomas <rrt@sc3d.org>
> Date: Sat, 23 Oct 2021 14:06:27 +0100
> Cc: Eli Zaretskii <eliz@gnu.org>, 18132@debbugs.gnu.org
> 
> I agree with Eli that mailcap is not the right tool for the job.

(Then why are we still talking about 'file'?)

> file's MIME-type support is easy to fix for types that don't (yet) have a 
> MIME type supplied; file is actively
> maintained and frequently released.

Not sure it will help.  Example:

  $ file --mime-type -k -b lisp/international/uni-bidi.el
  application/octet-stream

Looks like there are some fundamental problems in 'file' that make it
not ideal for this purpose, to say the least.  Which, to me, just
reiterates what I already said up-thread: we should allow users to
override what the system-level tools provide, because they will never
be 100% satisfactory for our needs.