Adjust to modern mercurial version definition.

  hg-stable$ hg log --patch mercurial/util.py
  ...
  changeset:   7640:9626819b2e3d
  user:        Matt Mackall <mpm@selenic.com>
  date:        Sat Jan 10 18:02:38 2009 -0600
  summary:     refactor version code
  
  diff --git a/mercurial/util.py b/mercurial/util.py
  --- a/mercurial/util.py
  +++ b/mercurial/util.py
  @@ -142,6 +142,14 @@
       """Find the length in characters of a local string"""
       return len(s.decode(_encoding, "replace"))
  
  +def version():
  +    """Return version information if available."""
  +    try:
  +        import __version__
  +        return __version__.version
  +    except ImportError:
  +        return 'unknown'
  +
   # used by parsedate
  ...
  hg-stable$ hg tags
  ...
  1.2                             7823:11efa41037e2
  1.1.2                           7497:11a4eb81fb4f
  ...

1 files changed, 13 insertions, 3 deletions

diff --git a/libbe/storage/vcs/hg.py b/libbe/storage/vcs/hg.py
index 076943a..4993233 100644
--- a/libbe/storage/vcs/hg.py
+++ b/libbe/storage/vcs/hg.py
@@ -23,11 +23,21 @@ Mercurial (hg) backend.
 
 try:
     import mercurial
-    import mercurial.version
     import mercurial.dispatch
     import mercurial.ui
 except ImportError:
     mercurial = None
+
+try:
+    # mercurial >= 1.2
+    from mercurial.util import version
+except ImportError:
+    try:
+        # mercurial <= 1.1.2
+        from mercurial.version import version
+    except ImportError:
+        version = None
+
 import os
 import os.path
 import re
@@ -57,9 +67,9 @@ class Hg(base.VCS):
         self.__updated = [] # work around http://mercurial.selenic.com/bts/issue618
 
     def _vcs_version(self):
-        if mercurial == None:
+        if version == None:
             return None
-        return mercurial.version.get_version()
+        return version()
 
     def _u_invoke_client(self, *args, **kwargs):
         if 'cwd' not in kwargs: