GNU bug report logs - #41250
28.0.50; Dired displays unconditionally ls-switches on modeline

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Arthur Miller <arthur.miller <at> live.com>
Cc: 41250 <at> debbugs.gnu.org, drew.adams <at> oracle.com, juri <at> linkov.net
Subject: bug#41250: 28.0.50; Dired displays unconditionally ls-switches on modeline
Date: Mon, 18 May 2020 17:25:54 +0300

> From: Arthur Miller <arthur.miller <at> live.com>
> Cc: drew.adams <at> oracle.com,  41250 <at> debbugs.gnu.org,  juri <at> linkov.net
> Date: Mon, 18 May 2020 00:57:42 +0200
> 
> Another question: can I assume, at this time of civilisation
> development, that everybody has GNU ls, since binutils, or coreutils, or
> what is the name, is probably default on most *nix distros, as well as
> on msys2 which is needed to build on Windows. No idea how Mac people are
> doing in that regard though?

No, we cannot assume GNU 'ls', since both *BSD Unix systems and macOS
(which is BSD-ish) use non-GNU 'ls'.

> I can try to detect if gnu ls is present say when dired-mode is
> loaded, but that would slow down dired every time we open a directory.

Don't we already detect GNU 'ls' by looking at the //DIRED signature?
Look in files.el.

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