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revset: disable subset optimization for parents() and children() (issue2437)...
revset: disable subset optimization for parents() and children() (issue2437) For the boolean operators, the subset optimization works by calculating the cheaper argument first, and passing the subset to the second argument to restrict the revision domain. This works well for filtering predicates. But parents() don't work like a filter: it may return revisions outside the specified set. So, combining it with boolean operators may easily yield incorrect results. For instance, for the following revision graph: 0 -- 1 the expression '0 and parents(1)' should evaluate as follows: 0 and parents(1) -> 0 and 0 -> 0 But since [0] is passed to parents() as a subset, we get instead: 0 and parents(1 and 0) -> 0 and parents([]) -> 0 and [] -> [] This also affects children(), p1() and p2(), for the same reasons. Predicates that call these (like heads()) are also affected. We work around this issue by ignoring the subset when propagating the call inside those predicates.
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config.txt
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Mercurial reads configuration data from several files, if they exist.
Below we list the most specific file first.
On Windows, these configuration files are read:
- ``<repo>\.hg\hgrc``
- ``%USERPROFILE%\.hgrc``
- ``%USERPROFILE%\mercurial.ini``
- ``%HOME%\.hgrc``
- ``%HOME%\mercurial.ini``
- ``C:\mercurial\mercurial.ini`` (unless regkey or hgrc.d\ or mercurial.ini found)
- ``HKEY_LOCAL_MACHINE\SOFTWARE\Mercurial`` (unless hgrc.d\ or mercurial.ini found)
- ``<hg.exe-dir>\hgrc.d\*.rc`` (unless mercurial.ini found)
- ``<hg.exe-dir>\mercurial.ini``
On Unix, these files are read:
- ``<repo>/.hg/hgrc``
- ``$HOME/.hgrc``
- ``/etc/mercurial/hgrc``
- ``/etc/mercurial/hgrc.d/*.rc``
- ``<install-root>/etc/mercurial/hgrc``
- ``<install-root>/etc/mercurial/hgrc.d/*.rc``
If there is a per-repository configuration file which is not owned by
the active user, Mercurial will warn you that the file is skipped::
not trusting file <repo>/.hg/hgrc from untrusted user USER, group GROUP
If this bothers you, the warning can be silenced (the file would still
be ignored) or trust can be established. Use one of the following
settings, the syntax is explained below:
- ``ui.report_untrusted = False``
- ``trusted.users = USER``
- ``trusted.groups = GROUP``
The configuration files for Mercurial use a simple ini-file format. A
configuration file consists of sections, led by a ``[section]`` header
and followed by ``name = value`` entries::
[ui]
username = Firstname Lastname <firstname.lastname@example.net>
verbose = True
The above entries will be referred to as ``ui.username`` and
``ui.verbose``, respectively. Please see the hgrc man page for a full
description of the possible configuration values:
- on Unix-like systems: ``man hgrc``
- online: http://www.selenic.com/mercurial/hgrc.5.html