bug#71504: 30.0.50; FR: Fix suggestions ("quick fix") for Flymake diagnostics

[Eli Zaretskii <eliz@gnu.org>]

> From: Eshel Yaron <me@eshelyaron.com>
> Cc: Eli Zaretskii <eliz@gnu.org>,  71504@debbugs.gnu.org
> Date: Thu, 27 Jun 2024 20:15:37 +0200
> 
> Spencer Baugh <sbaugh@janestreet.com> writes:
> 
> > Eli Zaretskii <eliz@gnu.org> writes:
> >>> Date: Wed, 12 Jun 2024 10:43:14 +0200
> >>> From:  Eshel Yaron via "Bug reports for GNU Emacs,
> >>>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> >>> 
> >>> Following a recent short discussion[0] on emacs-devel, I'm opening this
> >>> feature request so it doesn't get lost:
> >>> 
> >>> Flymake should provide a standard way for backends to associate fix
> >>> suggestions with the diagnostics they produce, along with a
> >>> backend-agnostic user interface (e.g. a command) for examining and
> >>> applying such fixes.
> >>> 
> >>> I suggested a possible implementation that works quite well for me
> >>> (with the three backends I've adapted so far - checkdoc, shellcheck
> >>> and Eglot), but any other solution that gives various backends a
> >>> standard way to provide their fixes would be just as welcome.
> 
> [...]
> 
> > I also think we have not sufficiently explored different UI
> > possibilities, and I think adding to flymake now will limit us in what
> > UI possibilities we can explore, no matter how generic we try to be.
> > And that UI exploration can happen without adding to flymake.
> >
> > For example, maybe we want to have a command which can accept fixes
> > output by a process running in M-x compile.  Baking the UI into flymake
> > would make that impossible, wouldn't it?
> 
> I don't think adding a command for fixing the diagnostic at point should
> preclude any other developments or explorations.  It's a useful thing to
> have, and many Flymake backends have the needed data readily available.
> 
> > So before any change in flymake I would like to see much more
> > exploration of "fix" UIs which are genuinely flymake-independent.
> 
> Flymake shows diagnostics, and "fixing" is what we do to diagnostics.
> What would be the benefit of a Flymake-independent UI for fixing the
> diagnostics that Flymake already shows?

The benefit would be that we will be able to use that UI when "fixes"
are shown in, for example, the *compilation* buffer.