# HG changeset patch
# User Durham Goode <durham@fb.com>
# Date 2017-10-26 23:15:31
# Node ID 0217f75b6e59cc098f99b6238ea50e121bcefd42
# Parent  fd78276948b486d50e1ba8c36c843aaf0780b6a0

dirstate: move clear onto dirstatemap class

A future diff will move the lazy loading aspect of dirstate to the dirstatemap
class. This means it requires a slightly different strategy of clearing than
just reinstantiating the object (since just reinstantiating the object will
lazily load the on disk data again later instead of remaining permanently
empty).

So let's give it it's own clear function.

Differential Revision: https://phab.mercurial-scm.org/D1252

diff --git a/mercurial/dirstate.py b/mercurial/dirstate.py
--- a/mercurial/dirstate.py
+++ b/mercurial/dirstate.py
@@ -593,8 +593,7 @@ class dirstate(object):
         return path
 
     def clear(self):
-        self._map = dirstatemap(self._ui, self._opener, self._root)
-        self._map.setparents(nullid, nullid)
+        self._map.clear()
         self._lastnormaltime = 0
         self._updatedfiles.clear()
         self._dirty = True
@@ -1210,6 +1209,11 @@ class dirstatemap(object):
         # for consistent view between _pl() and _read() invocations
         self._pendingmode = None
 
+    def clear(self):
+        self._map = {}
+        self.copymap = {}
+        self.setparents(nullid, nullid)
+
     def iteritems(self):
         return self._map.iteritems()