Rev 6574: (bug #830497) Teach Dirstate._validate to check that id_index maps back to actual entries. in http://bazaar.launchpad.net/~jameinel/tree-root-dirstate-830947

[John Arbash Meinel]

At http://bazaar.launchpad.net/~jameinel/tree-root-dirstate-830947

------------------------------------------------------------
revno: 6574
revision-id: john at arbash-meinel.com-20130519114254-n0suab1h0lh1b2bh
parent: pqm at pqm.ubuntu.com-20130207092516-eax0tqbckd3oiaw8
fixes bug: https://launchpad.net/bugs/830497
committer: John Arbash Meinel <john at arbash-meinel.com>
branch nick: tree-root-dirstate-830947
timestamp: Sun 2013-05-19 12:42:54 +0100
message:
  (bug #830497) Teach Dirstate._validate to check that id_index maps back to actual entries.
  
  This makes it clear that set_root_id should not be updating the index, as update_minimal
  is likely doing it correctly. (you don't want id_index to map to the unset root location,
  only to the currently set locations.)
  
  This makes the plain set_root_id test fail, which means we don't have to write
  any new tests.
-------------- next part --------------
=== modified file 'bzrlib/dirstate.py'
--- a/bzrlib/dirstate.py	2012-01-24 01:35:56 +0000
+++ b/bzrlib/dirstate.py	2013-05-19 11:42:54 +0000
@@ -2566,13 +2566,6 @@
         self.update_minimal(('', '', new_id), 'd',
             path_utf8='', packed_stat=entry[1][0][4])
         self._mark_modified()
-        # XXX: This was added by Ian, we need to make sure there
-        #      are tests for it, because it isn't in bzr.dev TRUNK
-        #      It looks like the only place it is called is in setting the root
-        #      id of the tree. So probably we never had an _id_index when we
-        #      don't even have a root yet.
-        if self._id_index is not None:
-            self._add_to_id_index(self._id_index, entry[0])
 
     def set_parent_trees(self, trees, ghosts):
         """Set the parent trees for the dirstate.
@@ -3285,10 +3278,20 @@
         if self._id_index is not None:
             for file_id, entry_keys in self._id_index.iteritems():
                 for entry_key in entry_keys:
+                    # Check that the entry in the map is pointing to the same
+                    # file_id
                     if entry_key[2] != file_id:
                         raise AssertionError(
                             'file_id %r did not match entry key %s'
                             % (file_id, entry_key))
+                    # And that from this entry key, we can look up the original
+                    # record
+                    block_index, present = self._find_block_index_from_key(entry_key)
+                    if not present:
+                        raise AssertionError('missing block for entry key: %r', entry_key)
+                    entry_index, present = self._find_entry_index(entry_key, self._dirblocks[block_index][1])
+                    if not present:
+                        raise AssertionError('missing entry for key: %r', entry_key)
                 if len(entry_keys) != len(set(entry_keys)):
                     raise AssertionError(
                         'id_index contained non-unique data for %s'