p4fastimport: clarify criss-cross comment

Summary: Clarify the criss-cross comment and our monotonic property.

Test Plan: None

Reviewers: #sourcecontrol, #idi, ikostia

Reviewed By: ikostia

Subscribers: ikostia, mjpieters

Differential Revision: https://phabricator.intern.facebook.com/D4921201

Signature: t1:4921201:1492696996:c2c8a179926649fac5009388d3c3054a627a9e10
This commit is contained in:
David Soria Parra 2017-04-25 15:29:39 +01:00
parent 0337eae344
commit 757087ede8

View File

@ -305,7 +305,8 @@ class FileImporter(object):
linkrev = self._importset.linkrev(c.cl)
fparent1, fparent2 = nullid, nullid
# invariant: our linkrevs do not criss-cross.
# invariant: our linkrevs do not criss-cross. They are monotonically
# increasing. See https://www.mercurial-scm.org/wiki/CrossedLinkrevs
assert linkrev >= lastlinkrev
lastlinkrev = linkrev