* net/tramp-vc.el (vc-user-login-name): Wrap defadvice with a test

for `process-file', in order to let it work for older Emacsen too.

1 files changed, 20 insertions, 19 deletions

diff --git a/lisp/net/tramp-vc.el b/lisp/net/tramp-vc.el
index b672ada295c..1ecbc806968 100644
--- a/lisp/net/tramp-vc.el
+++ b/lisp/net/tramp-vc.el
@@ -439,26 +439,27 @@ filename we are thinking about..."
 ;; The following defadvice is no longer necessary after changes in VC
 ;; on 2006-01-25, Andre.
 
-;; (defadvice vc-user-login-name
-;;   (around tramp-vc-user-login-name activate)
-;;   "Support for files on remote machines accessed by TRAMP."
-;;   ;; We rely on the fact that `file' is bound when this is called.
-;;   ;; This appears to be the case everywhere in vc.el and vc-hooks.el
-;;   ;; as of Emacs 20.5.
-;;   ;;
-;;   ;; CCC TODO there should be a real solution!  Talk to Andre Spiegel
-;;   ;; about this.
-;;   (let ((file (when (boundp 'file)
-;;                 (symbol-value 'file))))    ;pacify byte-compiler
-;;     (or (and (stringp file)
-;;              (tramp-tramp-file-p file)       ; tramp file
-;;              (setq ad-return-value
-;;                 (save-match-data
-;;                   (tramp-handle-vc-user-login-name uid)))) ; get the owner name
-;;         ad-do-it)))                     ; else call the original
+(unless (fboundp 'process-file)
+  (defadvice vc-user-login-name
+    (around tramp-vc-user-login-name activate)
+    "Support for files on remote machines accessed by TRAMP."
+    ;; We rely on the fact that `file' is bound when this is called.
+    ;; This appears to be the case everywhere in vc.el and vc-hooks.el
+    ;; as of Emacs 20.5.
+    ;;
+    ;; With Emacs 22, the definition of `vc-user-login-name' has been
+    ;; changed.  It doesn't need to be adviced any longer.
+    (let ((file (when (boundp 'file)
+                  (symbol-value 'file))))    ;pacify byte-compiler
+      (or (and (stringp file)
+               (tramp-tramp-file-p file)        ; tramp file
+               (setq ad-return-value
+                     (save-match-data
+                       (tramp-handle-vc-user-login-name uid)))) ; get the owner name
+          ad-do-it)))                     ; else call the original
 
-(add-hook 'tramp-unload-hook
-          '(lambda () (ad-unadvise 'vc-user-login-name)))
+  (add-hook 'tramp-unload-hook
+            '(lambda () (ad-unadvise 'vc-user-login-name))))
 
 
 ;; Determine the name of the user owning a file.