bug#17570: * lisp/vc/vc-hg.el (vc-hg-working-revision): Fix returning working revision instead of last revision.

[Stefan Monnier]

> I wish to fix the lisp/vc/vc-hg.el (vc-hg-working-revision) function with
> the `hg parent' command.

Good idea, thanks.  But your patch's indentation was completely messed
up (as well as placement of line breaks).
I installed a cleaned up version into `emacs-24' (contrary to the
previous patch which I installed into `trunk' since it was a new
feature rather than a bug-fix).


        Stefan


=== modified file 'lisp/ChangeLog'
--- lisp/ChangeLog      2014-06-06 14:25:39 +0000
+++ lisp/ChangeLog      2014-06-06 16:27:21 +0000
@@ -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

=== modified file 'lisp/vc/vc-hg.el'
--- lisp/vc/vc-hg.el    2014-05-11 02:01:08 +0000
+++ lisp/vc/vc-hg.el    2014-06-06 16:26:37 +0000
@@ -227,14 +227,11 @@
 
 (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
+  (or (ignore-errors
       (with-output-to-string
-        (process-file vc-hg-program nil standard-output nil
-                      "log" "-l" "1" "--template" "{rev}"
-                      (file-relative-name file))))))
+          (vc-hg-command standard-output 0 file
+                         "parent" "--template" "{rev}")))
+      "0"))
 
 ;;; History functions