# HG changeset patch
# User Paul Morelle <paul.morelle@octobus.net>
# Date 1520422084 -3600
# Node ID a43ef77cab1dd1ac6b0faab116260d9fe85d1bdc
# Parent  e0da43e2f71fbd51180823be004095a5cf9aaeef
revlog: bound number of snapshots in a chain

To limit the number of snapshot chained, we enforce them to be smaller and
smaller. This guarantee the number of snapshot in a chain will be bounded to a
small number.

diff -r e0da43e2f71f -r a43ef77cab1d mercurial/revlog.py
--- a/mercurial/revlog.py	Fri Jul 20 14:32:56 2018 +0200
+++ b/mercurial/revlog.py	Wed Mar 07 12:28:04 2018 +0100
@@ -2557,6 +2557,15 @@
         if self._maxchainlen and  self._maxchainlen < deltainfo.chainlen:
             return False
 
+        # bad delta from intermediate snapshot size limit
+        #
+        #   If an intermediate snapshot size is higher than the limit.  The
+        #   limit exist to prevent endless chain of intermediate delta to be
+        #   created.
+        if (deltainfo.snapshotdepth is not None and
+                (textlen >> deltainfo.snapshotdepth) < deltainfo.deltalen):
+            return False
+
         return True
 
     def _addrevision(self, node, rawtext, transaction, link, p1, p2, flags,