[PATCH 2 of 6] revlog: deltachain() returns chain of revs need to construct a revision
in3xes at gmail.com
in3xes at gmail.com
Mon Aug 9 11:09:17 CDT 2010
# HG changeset patch
# User Pradeepkumar Gayam <in3xes at gmail.com>
# Date 1281366268 -19800
# Node ID 9536451a578d75dae45bbefb197d48ef6d06d64c
# Parent 127044ace0a8bcc4412d5b4b74c6e5b9d189356c
revlog: deltachain() returns chain of revs need to construct a revision
diff -r 127044ace0a8 -r 9536451a578d mercurial/revlog.py
--- a/mercurial/revlog.py Mon Aug 09 20:33:14 2010 +0530
+++ b/mercurial/revlog.py Mon Aug 09 20:34:28 2010 +0530
@@ -1020,6 +1020,25 @@
def _chunkclear(self):
self._chunkcache = (0, '')
+ def deltaparent(self, rev):
+ """return previous revision or parentrev according to flags"""
+ if self.base(rev) == rev:
+ return nullrev
+ elif self.flags(rev) & REVIDX_PARENTDELTA:
+ return self.parentrevs(rev)[0]
+ else:
+ return rev-1
+
+
+ def deltachain(self, rev):
+ """return chain of revisions to construct a given revision"""
+ chain = []
+ while self.base(rev) != rev:
+ chain.append(rev)
+ rev = self.deltaparent(rev)
+ chain.reverse()
+ return rev, chain
+
def revdiff(self, rev1, rev2):
"""return or calculate a delta between two revisions"""
if rev1 + 1 == rev2 and self.base(rev1) == self.base(rev2):
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