[PATCH 2 of 3 V3] revlog: add instance variable controlling delta chain use
Gregory Szorc
gregory.szorc at gmail.com
Thu Oct 13 15:44:49 EDT 2016
# HG changeset patch
# User Gregory Szorc <gregory.szorc at gmail.com>
# Date 1474745137 25200
# Sat Sep 24 12:25:37 2016 -0700
# Node ID aed87a8bed99b373eec5fb09dd2f76d166af59e8
# Parent 4c98fccd5b70d2f89fe48bdb81288448daed758c
revlog: add instance variable controlling delta chain use
This is to support disabling delta chains on the changelog in a
subsequent patch.
diff --git a/mercurial/revlog.py b/mercurial/revlog.py
--- a/mercurial/revlog.py
+++ b/mercurial/revlog.py
@@ -296,8 +296,10 @@ class revlog(object):
elif fmt > REVLOGNG:
raise RevlogError(_("index %s unknown format %d")
% (self.indexfile, fmt))
+ self._storedeltachains = True
+
self._io = revlogio()
if self.version == REVLOGV0:
self._io = revlogoldio()
try:
@@ -1468,9 +1470,9 @@ class revlog(object):
else:
textlen = len(text)
# should we try to build a delta?
- if prev != nullrev:
+ if prev != nullrev and self._storedeltachains:
tested = set()
# This condition is true most of the time when processing
# changegroup data into a generaldelta repo. The only time it
# isn't true is if this is the first revision in a delta chain
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