Fix annotating other revisions for renamed files in vc-annotate.

* lisp/vc-annotate.el (vc-annotate): Add an optional argument for the
VC backend.  Use it when non-nil.
(vc-annotate-warp-revision): Pass the VC backend to vc-annotate.  (Bug#6487)

1 files changed, 6 insertions, 3 deletions

diff --git a/lisp/vc-annotate.el b/lisp/vc-annotate.el
index ffc11953903..da2f5de80df 100644
--- a/lisp/vc-annotate.el
+++ b/lisp/vc-annotate.el
@@ -314,7 +314,7 @@ use; you may override this using the second optional arg MODE."
                   vc-annotate-display-mode))))
 
 ;;;###autoload
-(defun vc-annotate (file rev &optional display-mode buf move-point-to)
+(defun vc-annotate (file rev &optional display-mode buf move-point-to vc-bk)
   "Display the edit history of the current FILE using colors.
 
 This command creates a buffer that shows, for each line of the current
@@ -335,6 +335,8 @@ age, and everything that is older than that is shown in blue.
 
 If MOVE-POINT-TO is given, move the point to that line.
 
+If VC-BK is given used that VC backend.
+
 Customization variables:
 
 `vc-annotate-menu-elements' customizes the menu elements of the
@@ -375,7 +377,7 @@ mode-specific menu.  `vc-annotate-color-map' and
                 ;; In case it had to be uniquified.
                 (setq temp-buffer-name (buffer-name))))
     (with-output-to-temp-buffer temp-buffer-name
-      (let ((backend (vc-backend file))
+      (let ((backend (or vc-bk (vc-backend file)))
             (coding-system-for-read buffer-file-coding-system))
         (vc-call-backend backend 'annotate-command file
                          (get-buffer temp-buffer-name) rev)
@@ -596,7 +598,8 @@ describes a revision number, so warp to that revision."
                      ;; place the point in the line.
                      (min oldline (progn (goto-char (point-max))
                                          (forward-line -1)
-                                         (line-number-at-pos))))))))
+                                         (line-number-at-pos)))
+                     vc-annotate-backend)))))
 
 (defun vc-annotate-compcar (threshold a-list)
   "Test successive cons cells of A-LIST against THRESHOLD.