--- a/hgext/evolve.py
+++ b/hgext/evolve.py
@@ -1254,20 +1254,10 @@
         raise util.Abort(_("conflict rewriting. can't choose destination\n"))
     return repo[newer[0][0]].rev()
 
-def orderrevs(repo, revs):
-    """ Compute an ordering to solve instability for the given revs
-
-    - Takes revs a list of instable revisions
-
-    - Returns the same revisions ordered to solve their instability from the
-    bottom to the top of the stack that the stabilization process will produce
-    eventually.
-
-    This ensure the minimal number of stabilization as we can stabilize each
-    revision on its final, stabilized, destination.
-    """
-
-    # Step 1: Build the dependency graph
+def builddependencies(repo, revs):
+    """ returns dependency graphs giving an order to solve instability of revs
+    (see orderrevs for more information on usage) """
+
     # For each troubled revision we keep track of what instability if any should
     # be resolved in order to resolve it. Example:
     # dependencies = {3: [6], 6:[]}
@@ -1283,7 +1273,22 @@
             if succ in revs:
                 dependencies[r].add(succ)
                 rdependencies[succ].add(r)
-
+    return dependencies, rdependencies
+
+def orderrevs(repo, revs):
+    """ Compute an ordering to solve instability for the given revs
+
+    - Takes revs a list of instable revisions
+
+    - Returns the same revisions ordered to solve their instability from the
+    bottom to the top of the stack that the stabilization process will produce
+    eventually.
+
+    This ensure the minimal number of stabilization as we can stabilize each
+    revision on its final, stabilized, destination.
+    """
+    # Step 1: Build the dependency graph
+    dependencies, rdependencies = builddependencies(repo, revs)
     # Step 2: Build the ordering
     # Remove the revisions with no dependency(A) and add them to the ordering.
     # Removing these revisions leads to new revisions with no dependency (the