Mark vc-switch-backend as obsolete

* etc/NEWS: Mention the change.

* lisp/vc/vc.el (vc-switch-backend): Mark as obsolete (bug#50344).
(vc-transfer-file): Wrap the calls in 'with-suppressed-warnings'.

diff --git a/etc/NEWS b/etc/NEWS
index 791248f7dc4732220aa8a3be67044404b3c39867..b7c4346db97547e1d1654cc76ed34e1b63b8ec49 100644 (file)
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -1937,6 +1937,10 @@ tags to be considered as well.
 *** New user option 'vc-git-log-switches'.
 String or list of strings specifying switches for Git log under VC.
 
+*** Command 'vc-switch-backend' is now obsolete.
+If you are still using it with any regularity, please file a bug
+report with some details.
+
 ** Gnus
 
 +++

diff --git a/lisp/vc/vc.el b/lisp/vc/vc.el
index 5b259fcdb33956973347f0a4b9bdafd6896a3988..67003c839263d07d412ded4a9eedd51a8ed1c02b 100644 (file)
--- a/lisp/vc/vc.el
+++ b/lisp/vc/vc.el
@@ -2864,6 +2864,7 @@ permanent, only for the current session.  This function only changes
 VC's perspective on FILE, it does not register or unregister it.
 By default, this command cycles through the registered backends.
 To get a prompt, use a prefix argument."
+  (declare (obsolete nil "28.1"))
   (interactive
    (list
     (or buffer-file-name
@@ -2918,7 +2919,8 @@ backend to NEW-BACKEND, and unregister FILE from the current backend.
     (if registered
        (set-file-modes file (logior (file-modes file) 128))
       ;; `registered' might have switched under us.
-      (vc-switch-backend file old-backend)
+      (with-suppressed-warnings ((obsolete vc-switch-backend))
+        (vc-switch-backend file old-backend))
       (let* ((rev (vc-working-revision file))
             (modified-file (and edited (make-temp-file file)))
             (unmodified-file (and modified-file (vc-version-backup-file file))))
@@ -2937,16 +2939,19 @@ backend to NEW-BACKEND, and unregister FILE from the current backend.
                    (vc-revert-file file))))
              (vc-call-backend new-backend 'receive-file file rev))
          (when modified-file
-           (vc-switch-backend file new-backend)
+            (with-suppressed-warnings ((obsolete vc-switch-backend))
+              (vc-switch-backend file new-backend))
            (unless (eq (vc-checkout-model new-backend (list file)) 'implicit)
              (vc-checkout file))
            (rename-file modified-file file 'ok-if-already-exists)
            (vc-file-setprop file 'vc-checkout-time nil)))))
     (when move
-      (vc-switch-backend file old-backend)
+      (with-suppressed-warnings ((obsolete vc-switch-backend))
+        (vc-switch-backend file old-backend))
       (setq comment (vc-call-backend old-backend 'comment-history file))
       (vc-call-backend old-backend 'unregister file))
-    (vc-switch-backend file new-backend)
+    (with-suppressed-warnings ((obsolete vc-switch-backend))
+      (vc-switch-backend file new-backend))
     (when (or move edited)
       (vc-file-setprop file 'vc-state 'edited)
       (vc-mode-line file new-backend)