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namespaces: let namespaces override singlenode() definition...
namespaces: let namespaces override singlenode() definition Some namespaces have multiple nodes per name (meaning that their namemap() returns multiple nodes). One such namespace is the "topics" namespace (from the evolve repo). We also have our own internal namespace at Google (for review units) that has multiple nodes per name. These namespaces may not want to use the default "pick highest revnum" resolution that we currently use when resolving a name to a single node. As an example, they may decide that `hg co <name>` should check out a commit that's last in some sense even if an earlier commit had just been amended and thus had a higher revnum [1]. This patch gives the namespace the option to continue to return multiple nodes and to override how the best node is picked. Allowing namespaces to override that may also be useful as an optimization (it may be cheaper for the namespace to find just that node). I have been arguing (in D3715) for using all the nodes returned from namemap() when resolving the symbol to a revset, so e.g. `hg log -r stable` would resolve to *all* nodes on stable, not just the one with the highest revnum (except that I don't actually think we should change it for the branch namespace because of BC). Most people seem opposed to that. If we decide not to do it, I think we can deprecate the namemap() function in favor of the new singlenode() (I find it weird to have namespaces, like the branch namespace, where namemap() isn't nodemap()'s inverse). I therefore think this patch makes sense regardless of what we decide on that issue. [1] Actually, even the branch namespace would have wanted to override singlenode() if it had supported multiple nodes. That's because closes branch heads are mostly ignored, so "hg co default" will not check out the highest-revnum node if that's a closed head. Differential Revision: https://phab.mercurial-scm.org/D3852
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Takumi IINO
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 r19426 ======
hgrc
======
---------------------------------
configuration files for Mercurial
---------------------------------
:Author: Bryan O'Sullivan <bos@serpentine.com>
:Organization: Mercurial
:Manual section: 5
:Manual group: Mercurial Manual
.. contents::
:backlinks: top
:class: htmlonly
Description
===========
.. include:: hgrc.5.gendoc.txt
Author
======
Bryan O'Sullivan <bos@serpentine.com>.
Mercurial was written by Matt Mackall <mpm@selenic.com>.
See Also
========
|hg(1)|_, |hgignore(5)|_
Copying
=======
This manual page is copyright 2005 Bryan O'Sullivan.
av6
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 r35792 Mercurial is copyright 2005-2018 Matt Mackall.
Takumi IINO
doc: make man and html from translated documents...
 r19426 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