mergestate: add a way to record pending dirstate actions

We're going to use this in resolve in the next patch.

mercurial/merge.py

@@ -517,6 +517,11 b' class mergestate(object):'
                 actions[action].append((f, None, "merge result"))
         return actions
 
+    def recordactions(self):
+        """record remove/add/get actions in the dirstate"""
+        branchmerge = self._repo.dirstate.p2() != nullid
+        recordupdates(self._repo, self.actions(), branchmerge)
+
 def _checkunknownfile(repo, wctx, mctx, f, f2=None):
     if f2 is None:
         f2 = f