bug#56229: title: add a function to move a file from one place to another

[Zachary Kanfer <zkanfer@gmail.com>]

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Attached a patch with the function name changed to `rename-visited-file`.

I like the analogy to `rename-file`.


On Sun, Jun 26, 2022 at 11:41 AM Visuwesh <visuweshm@gmail.com> wrote:

> [ஞாயிறு ஜூன் 26, 2022] Lars Ingebrigtsen wrote:
>
> > Zachary Kanfer <zkanfer@gmail.com> writes:
> >
> >> It's more complicated because if the buffer is *not* visiting a file,
> >> the right thing for this function to just save the buffer to the
> >> location selected. I don't know if the name that needs to take that
> >> into account.
> >>
> >> Is there a name for the file a buffer is visiting? Maybe
> >> "move-associated-file"?  "move-visited-file"?
> >
> > I like `move-visited-file'.  Or perhaps `rename-visited-file'?
>
> I think `rename-visited-file' would fit in better especially since we
> already have `rename-file'; it also parallels dired's R command.
>

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From f8d1473824b7120a1d0f1440cf0179ffebebbc0e Mon Sep 17 00:00:00 2001
From: Zachary Kanfer <zkanfer@gmail.com>
Date: Sat, 25 Jun 2022 01:48:38 -0400
Subject: [PATCH] Add a function to rename the file visited by the current
 buffer.

* lisp/files.el (rename-visited-file)
---
 etc/NEWS      |  3 +++
 lisp/files.el | 19 +++++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/etc/NEWS b/etc/NEWS
index 6c04ae164c..78e810ac9f 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -339,6 +339,9 @@ match those regexps will be ignored by 'switch-to-prev-buffer' and
 
 ** Menus
 
+** New command 'move-file'.
+This command moves a file to a new location.
+
 ---
 *** The entries following the buffers in the "Buffers" menu can now be altered.
 Change the 'menu-bar-buffers-menu-command-entries' variable to alter
diff --git a/lisp/files.el b/lisp/files.el
index a804f0088e..278f80679a 100644
--- a/lisp/files.el
+++ b/lisp/files.el
@@ -4817,6 +4817,25 @@ write-file
     ;; It's likely that the VC status at the new location is different from
     ;; the one at the old location.
     (vc-refresh-state)))
+
+(defun rename-visited-file (new-location)
+  "Rename the file visited by the current buffer to NEW-LOCATION.
+
+Interactively, this prompts for NEW-LOCATION.
+
+If the file has not been visited, this works similarly to #'write-file".
+  (interactive (list (if buffer-file-name
+                         (read-file-name "Rename file to: ")
+                       (read-file-name "Rename file to: "
+                                       default-directory
+                                       (expand-file-name (file-name-nondirectory (buffer-name))
+                                                         default-directory)))))
+  (let ((old-location (buffer-file-name)))
+    (write-file new-location t)
+    (when (and old-location
+               (file-exists-p new-location))
+      (delete-file old-location))))
+
 \f
 (defun file-extended-attributes (filename)
   "Return an alist of extended attributes of file FILENAME.
-- 
2.25.1