* lisp/vc/vc-hg.el (vc-hg-working-revision): Use "hg parent" and

vc-hg-command.

Fixes: debbugs:17570

2 files changed, 10 insertions, 8 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 77b1585dcbe..a3f061a7d93 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,8 @@
+2014-06-06  Santiago Payà i Miralta  <santiagopim@gmail.com>
+
+        * vc/vc-hg.el (vc-hg-working-revision): Use "hg parent" and
+        vc-hg-command (bug#17570).
+
 2014-06-06  Stefan Monnier  <monnier@iro.umontreal.ca>
 
         * international/mule-cmds.el (ucs-names): Add special entry for BEL
diff --git a/lisp/vc/vc-hg.el b/lisp/vc/vc-hg.el
index 05b53a3eeb6..b800c64c869 100644
--- a/lisp/vc/vc-hg.el
+++ b/lisp/vc/vc-hg.el
@@ -227,14 +227,11 @@ highlighting the Log View buffer."
 
 (defun vc-hg-working-revision (file)
   "Hg-specific version of `vc-working-revision'."
-  (let ((default-directory (if (file-directory-p file)
-                               (file-name-as-directory file)
-                             (file-name-directory file))))
-    (ignore-errors
-      (with-output-to-string
-        (process-file vc-hg-program nil standard-output nil
-                      "log" "-l" "1" "--template" "{rev}"
-                      (file-relative-name file))))))
+  (or (ignore-errors
+        (with-output-to-string
+          (vc-hg-command standard-output 0 file
+                         "parent" "--template" "{rev}")))
+      "0"))
 
 ;;; History functions