bug#52148: 29.0.50; [PATCH] Make `project-kill-buffers' display list of buffers to kill

[Matthias Meulien]

This is a feature request. I would find convenient and safer to list
buffers to kill when `project-kill-buffers' is called.

The attached patch is an attempt to implement this feature, inspired by
what I read in `save-buffers-kill-emacs' implementation.

>From 2041a621ba5be0c4b2f563a554263b37d4192ce2 Mon Sep 17 00:00:00 2001
From: Matthias Meulen <orontee@gmail.com>
Date: Sat, 27 Nov 2021 22:43:20 +0100
Subject: [PATCH] `project-kill-buffers` displays list of buffers to kill

* lisp/progmodes/project.el (project-kill-buffers):
Temporarily display list of buffers to kill
---
 lisp/progmodes/project.el | 23 ++++++++++++++++++++---
 1 file changed, 20 insertions(+), 3 deletions(-)

diff --git a/lisp/progmodes/project.el b/lisp/progmodes/project.el
index ed076a683d..0d8ed3646a 100644
--- a/lisp/progmodes/project.el
+++ b/lisp/progmodes/project.el
@@ -1281,9 +1281,26 @@ project-kill-buffers
            (mapc #'kill-buffer bufs))
           ((null bufs)
            (message "No buffers to kill"))
-          ((yes-or-no-p (format "Kill %d buffers in %s? "
-                                (length bufs)
-                                (project-root pr)))
+          ((with-current-buffer-window
+                (get-buffer-create "*Buffer List*")
+                `(display-buffer--maybe-at-bottom
+                  (dedicated . t)
+                  (window-height . (fit-window-to-buffer))
+                  (preserve-size . (nil . t))
+                  (body-function
+                   . ,#'(lambda (_window)
+                          (list-buffers-noselect nil bufs))))
+                #'(lambda (window _value)
+                    (with-selected-window window
+                      (unwind-protect
+                          (progn
+                            (setq confirm nil)
+                            (yes-or-no-p
+                             (format "Kill %d buffers in %s? "
+                                     (length bufs)
+                                     (project-root pr))))
+                        (when (window-live-p window)
+                          (quit-restore-window window 'kill))))))
            (mapc #'kill-buffer bufs)))))
 
 
-- 
2.30.2



In GNU Emacs 29.0.50 (build 3, x86_64-pc-linux-gnu, GTK+ Version 3.24.24, cairo 
version 1.16.0)
 of 2021-11-27 built on carbon
Repository revision: 338f7802373f1cfcc1b3749bbd46091fdef727f4
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12011000
System Description: Debian GNU/Linux 11 (bullseye)

Configured using:
 'configure --with-native-compilation'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
JSON LCMS2 LIBOTF LIBSELINUX LIBXML2 M17N_FLT MODULES NATIVE_COMP NOTIFY
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