strip: make --keep option not set all dirstate times to 0
hg strip -k was using dirstate.rebuild() which reset all the dirstate
entries timestamps to 0. This meant that the next time hg status was
run every file was considered to be 'unsure', which caused it to do
expensive read operations on every filelog. On a repo with >150,000
files it took 70 seconds when everything was in memory. From a cold
cache it took several minutes.
The fix is to only reset files that have changed between the working
context and the destination context.
For reference, --keep means the working directory is left alone during
the strip. We have users wanting to use this operation to store their
work-in-progress as a commit on a branch while they go work on another
branch, then come back later and be able to uncommit that work and
continue working. They currently use 'git reset HARD^' to accomplish
this in git.
==========
hgignore
==========
---------------------------------
syntax for Mercurial ignore files
---------------------------------
:Author: Vadim Gelfer <vadim.gelfer@gmail.com>
:Organization: Mercurial
:Manual section: 5
:Manual group: Mercurial Manual
.. include:: ../mercurial/help/hgignore.txt
Author
======
Vadim Gelfer <vadim.gelfer@gmail.com>
Mercurial was written by Matt Mackall <mpm@selenic.com>.
See Also
========
|hg(1)|_, |hgrc(5)|_
Copying
=======
This manual page is copyright 2006 Vadim Gelfer.
Mercurial is copyright 2005-2012 Matt Mackall.
Free use of this software is granted under the terms of the GNU General
Public License version 2 or any later version.
.. include:: common.txt