Mercurial > hg
view mercurial/help/patterns.txt @ 21990:48e32c2c499b stable
context: call normal on the right object
dirstate.normal is the method that marks files as unchanged/normal.
Rev 20a30cd41d21 started caching dirstate.normal in order to improve
performance. However, there was an error in the patch: taking the wlock, under
some conditions depending on platform, can cause a new dirstate object to be
created. Caching dirstate.normal before calling wlock would then cause the
fixup calls below to be on the old dirstate object, effectively disappearing
into the ether.
On Unix and Unix-like OSes, the condition under which we create a new dirstate
object is 'the dirstate file has been modified since the last time we opened
it'. This happens pretty rarely, so the object is usually the same -- there's
little impact.
On Windows, the condition is 'always'. This means files in the lookup state are
never marked normal, so the bug has a serious performance impact since all the
files in the lookup state are re-read every time hg status is run.
author | Siddharth Agarwal <sid0@fb.com> |
---|---|
date | Fri, 01 Aug 2014 18:30:18 -0700 |
parents | f1a3ae7c15df |
children | 7072b91ccd20 |
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Mercurial accepts several notations for identifying one or more files at a time. By default, Mercurial treats filenames as shell-style extended glob patterns. Alternate pattern notations must be specified explicitly. .. note:: Patterns specified in ``.hgignore`` are not rooted. Please see :hg:`help hgignore` for details. To use a plain path name without any pattern matching, start it with ``path:``. These path names must completely match starting at the current repository root. To use an extended glob, start a name with ``glob:``. Globs are rooted at the current directory; a glob such as ``*.c`` will only match files in the current directory ending with ``.c``. The supported glob syntax extensions are ``**`` to match any string across path separators and ``{a,b}`` to mean "a or b". To use a Perl/Python regular expression, start a name with ``re:``. Regexp pattern matching is anchored at the root of the repository. To read name patterns from a file, use ``listfile:`` or ``listfile0:``. The latter expects null delimited patterns while the former expects line feeds. Each string read from the file is itself treated as a file pattern. All patterns, except for ``glob:`` specified in command line (not for ``-I`` or ``-X`` options), can match also against directories: files under matched directories are treated as matched. Plain examples:: path:foo/bar a name bar in a directory named foo in the root of the repository path:path:name a file or directory named "path:name" Glob examples:: glob:*.c any name ending in ".c" in the current directory *.c any name ending in ".c" in the current directory **.c any name ending in ".c" in any subdirectory of the current directory including itself. foo/*.c any name ending in ".c" in the directory foo foo/**.c any name ending in ".c" in any subdirectory of foo including itself. Regexp examples:: re:.*\.c$ any name ending in ".c", anywhere in the repository File examples:: listfile:list.txt read list from list.txt with one file pattern per line listfile0:list.txt read list from list.txt with null byte delimiters See also :hg:`help filesets`.