mercurial/help/patterns.txt
author Gregory Szorc <gregory.szorc@gmail.com>
Sat, 27 Feb 2016 18:22:49 -0800
branchstable
changeset 28289 d493d64757eb
parent 25284 7072b91ccd20
child 31012 88358446da16
permissions -rw-r--r--
hg: obtain lock when creating share from pooled repo (issue5104) There are race conditions between clients performing a shared clone to pooled storage: 1) Clients race to create the new shared repo in the pool directory 2) 1 client is seeding the repo in the pool directory and another goes to share it before it is fully cloned We prevent these race conditions by obtaining a lock in the pool directory that is derived from the name of the repo we will be accessing. To test this, a simple generic "lockdelay" extension has been added. The extension inserts an optional, configurable delay before or after lock acquisition. In the test, we delay 2 seconds after lock acquisition in the first process and 1 second before lock acquisition in the 2nd process. This means the first process has 1s to obtain the lock. There is a race condition here. If we encounter it in the wild, we could change the dummy extension to wait on the lock file to appear instead of relying on timing. But that's more complicated. Let's see what happens first.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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Mercurial accepts several notations for identifying one or more files
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at a time.
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By default, Mercurial treats filenames as shell-style extended glob
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patterns.
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Alternate pattern notations must be specified explicitly.
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.. note::
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  Patterns specified in ``.hgignore`` are not rooted.
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  Please see :hg:`help hgignore` for details.
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To use a plain path name without any pattern matching, start it with
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``path:``. These path names must completely match starting at the
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current repository root.
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To use an extended glob, start a name with ``glob:``. Globs are rooted
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at the current directory; a glob such as ``*.c`` will only match files
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in the current directory ending with ``.c``.
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The supported glob syntax extensions are ``**`` to match any string
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across path separators and ``{a,b}`` to mean "a or b".
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To use a Perl/Python regular expression, start a name with ``re:``.
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Regexp pattern matching is anchored at the root of the repository.
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To read name patterns from a file, use ``listfile:`` or ``listfile0:``.
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The latter expects null delimited patterns while the former expects line
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feeds. Each string read from the file is itself treated as a file
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pattern.
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To read a set of patterns from a file, use ``include:`` or ``subinclude:``.
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``include:`` will use all the patterns from the given file and treat them as if
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they had been passed in manually.  ``subinclude:`` will only apply the patterns
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against files that are under the subinclude file's directory. See :hg:`help
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hgignore` for details on the format of these files.
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All patterns, except for ``glob:`` specified in command line (not for
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``-I`` or ``-X`` options), can match also against directories: files
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under matched directories are treated as matched.
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Plain examples::
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  path:foo/bar   a name bar in a directory named foo in the root
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                 of the repository
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  path:path:name a file or directory named "path:name"
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Glob examples::
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  glob:*.c       any name ending in ".c" in the current directory
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  *.c            any name ending in ".c" in the current directory
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  **.c           any name ending in ".c" in any subdirectory of the
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                 current directory including itself.
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  foo/*.c        any name ending in ".c" in the directory foo
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  foo/**.c       any name ending in ".c" in any subdirectory of foo
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                 including itself.
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Regexp examples::
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  re:.*\.c$      any name ending in ".c", anywhere in the repository
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File examples::
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  listfile:list.txt  read list from list.txt with one file pattern per line
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  listfile0:list.txt read list from list.txt with null byte delimiters
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See also :hg:`help filesets`.
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Include examples::
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  include:path/to/mypatternfile    reads patterns to be applied to all paths
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  subinclude:path/to/subignorefile reads patterns specifically for paths in the
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                                   subdirectory