#
#
# patch "tracvc/mtn/automate.py"
#  from [cddf03c360177a4888e6c37ceb621bd530817cc2]
#    to [d731080c4d4937f8026740125c6b71976810e1a2]
#
============================================================
--- tracvc/mtn/automate.py	cddf03c360177a4888e6c37ceb621bd530817cc2
+++ tracvc/mtn/automate.py	d731080c4d4937f8026740125c6b71976810e1a2
@@ -1,9 +1,9 @@ Trac Plugin for Monotone
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 """
 Trac Plugin for Monotone
 
-Copyright 2006, 2007 Thomas Moschny (address@hidden)
+Copyright 2006 - 2008 Thomas Moschny (address@hidden)
 
 {{{
 This program is free software; you can redistribute it and/or modify
@@ -177,14 +177,16 @@ class MTN(object):
 
     def roots(self):
         """Returns a list of all root revisions."""
-        # FIXME: we should have an automate command for that.
         if self.roots_cache:
             return self.roots_cache
-        roots = []
-        for line in self.automate.command("graph").splitlines():
-            rev_and_parents = line.split(' ')
-            if len(rev_and_parents) == 1:
-                roots.append(rev_and_parents[0])
+        if self.min_interface_version('4.3'):
+            roots = self.automate.command("roots").splitlines()
+        else:
+            roots = []
+            for line in self.automate.command("graph").splitlines():
+                rev_and_parents = line.split(' ')
+                if len(rev_and_parents) == 1:
+                    roots.append(rev_and_parents[0])
         self.roots_cache = roots
         return roots
 
@@ -337,6 +339,9 @@ class MTN(object):
                 "interface_version").strip()
         return self.interface_version
 
+    def min_interface_version(self, v):
+        return natsort_key(self.get_interface_version()) \
+            >= natsort_key(v)
 
 class Changeset(object):
     """Represents a monotone changeset in parsed form."""