D7883: nodemap: keep track of the ondisk id of nodemap blocks

[marmoute (Pierre-Yves David)]

marmoute created this revision.
Herald added a subscriber: mercurial-devel.
Herald added a reviewer: hg-reviewers.

REVISION SUMMARY
  If we are to incrementally update the files, we need to keep some details about
  the data we read.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D7883

AFFECTED FILES
  mercurial/revlogutils/nodemap.py

CHANGE DETAILS

diff --git a/mercurial/revlogutils/nodemap.py b/mercurial/revlogutils/nodemap.py
--- a/mercurial/revlogutils/nodemap.py
+++ b/mercurial/revlogutils/nodemap.py
@@ -220,6 +220,11 @@
 
     contains up to 16 entry indexed from 0 to 15"""
 
+    def __init__(self):
+        super(Block, self).__init__()
+        # If this block exist on disk, here is its ID
+        self.ondisk_id = None
+
     def __iter__(self):
         return iter(self.get(i) for i in range(16))
 
@@ -330,8 +335,8 @@
     """Parse the serialization of an individual block
     """
     block = Block()
-    ondisk_id = len(block_map)
-    block_map[ondisk_id] = block
+    block.ondisk_id = len(block_map)
+    block_map[block.ondisk_id] = block
     values = S_BLOCK.unpack(block_data)
     for idx, v in enumerate(values):
         if v == NO_ENTRY:



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