bug#74833: 31.0.50; Copy to OS clipboard doesn't work in macOS Terminal.app with xterm-mouse-mode enabled

[Eli Zaretskii <eliz@gnu.org>]

> Date: Thu, 26 Dec 2024 15:51:14 -0800
> From: Jared Finder <jared@finder.org>
> Cc: Eli Zaretskii <eliz@gnu.org>, rms@gnu.org, gerd.moellmann@gmail.com,
>  fgunbin@fastmail.fm, 74833@debbugs.gnu.org
> 
> On 2024-12-23 11:43, Ship Mints wrote:
> > On Mon, Dec 23, 2024 at 4:07 PM Eli Zaretskii <eliz@gnu.org> wrote:
> >>> From: Ship Mints <shipmints@gmail.com>
> >>> 
> >>> Away from a computer, but I think this is still the same in 0.82 
> >>> these days and I assume you're using modern
> >>> ssh.
> >>> 
> >>> https://serverfault.com/a/819740
> >> 
> >> OK, so does this mean we want to tell PuTTY users to configure this in
> >> some specific way that Emacs can recognize?
> > 
> > Still away from a computer. If you can set a variable using that method 
> > and have it pass through for you to test in lisp, then it would be a 
> > good idea to recommend. We could suggest using TERM_PROGRAM and setting 
> > it to "Putty".
> 
> What if we only auto-enabled xterm-mouse-mode on OSC52 compatible 
> terminals?

On OSC52 compatible terminals, or on OSC52 compatible terminals that
define TERM to xterm-like string?  The latter sounds like a good idea
to me, but only if support for OSC52 necessarily means xterm-mouse
escape sequences must be supported.  Is this conjecture indeed true?

> Between $TERM and the results from the terminal escape 
> sequence "ESC [ > 0 q", Emacs can have high confidence if it is running 
> on an OSC52 compatible terminal. I checked against most of the terminals 
> mentioned at 
> https://can-i-use-terminal.github.io/features/osc52copy.html I just 
> wasn't able to test Foot (Wayland-only), hterm (Chromebook-only), mintty 
> (Cygwin-only), or xterm.js (I have no idea how to test).

How do I check this? can you show some script or Lisp or whatever you
used to check?

Thanks.