mirror of
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f1ed7fea79
check-attr and check-ignore have the potential to deadlock callers
which do not read back the output in real-time. For example, if a
caller writes N paths out and then reads N lines back in, it risks
becoming blocked on write() to check-*, and check-* is blocked on
write back to the caller. Somebody has to buffer; the pipe buffers
provide some leeway, but they are limited.
Thanks to Peff for pointing this out:
http://article.gmane.org/gmane.comp.version-control.git/220534
Signed-off-by: Adam Spiers <git@adamspiers.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
109 lines
3.4 KiB
Text
109 lines
3.4 KiB
Text
git-check-ignore(1)
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===================
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NAME
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----
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git-check-ignore - Debug gitignore / exclude files
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SYNOPSIS
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--------
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[verse]
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'git check-ignore' [options] pathname...
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'git check-ignore' [options] --stdin < <list-of-paths>
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DESCRIPTION
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-----------
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For each pathname given via the command-line or from a file via
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`--stdin`, show the pattern from .gitignore (or other input files to
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the exclude mechanism) that decides if the pathname is excluded or
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included. Later patterns within a file take precedence over earlier
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ones.
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OPTIONS
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-------
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-q, --quiet::
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Don't output anything, just set exit status. This is only
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valid with a single pathname.
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-v, --verbose::
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Also output details about the matching pattern (if any)
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for each given pathname.
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--stdin::
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Read file names from stdin instead of from the command-line.
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-z::
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The output format is modified to be machine-parseable (see
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below). If `--stdin` is also given, input paths are separated
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with a NUL character instead of a linefeed character.
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-n, --non-matching::
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Show given paths which don't match any pattern. This only
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makes sense when `--verbose` is enabled, otherwise it would
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not be possible to distinguish between paths which match a
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pattern and those which don't.
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OUTPUT
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------
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By default, any of the given pathnames which match an ignore pattern
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will be output, one per line. If no pattern matches a given path,
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nothing will be output for that path; this means that path will not be
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ignored.
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If `--verbose` is specified, the output is a series of lines of the form:
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<source> <COLON> <linenum> <COLON> <pattern> <HT> <pathname>
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<pathname> is the path of a file being queried, <pattern> is the
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matching pattern, <source> is the pattern's source file, and <linenum>
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is the line number of the pattern within that source. If the pattern
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contained a `!` prefix or `/` suffix, it will be preserved in the
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output. <source> will be an absolute path when referring to the file
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configured by `core.excludesfile`, or relative to the repository root
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when referring to `.git/info/exclude` or a per-directory exclude file.
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If `-z` is specified, the pathnames in the output are delimited by the
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null character; if `--verbose` is also specified then null characters
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are also used instead of colons and hard tabs:
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<source> <NULL> <linenum> <NULL> <pattern> <NULL> <pathname> <NULL>
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If `-n` or `--non-matching` are specified, non-matching pathnames will
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also be output, in which case all fields in each output record except
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for <pathname> will be empty. This can be useful when running
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non-interactively, so that files can be incrementally streamed to
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STDIN of a long-running check-ignore process, and for each of these
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files, STDOUT will indicate whether that file matched a pattern or
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not. (Without this option, it would be impossible to tell whether the
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absence of output for a given file meant that it didn't match any
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pattern, or that the output hadn't been generated yet.)
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Buffering happens as documented under the `GIT_FLUSH` option in
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linkgit:git[1]. The caller is responsible for avoiding deadlocks
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caused by overfilling an input buffer or reading from an empty output
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buffer.
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EXIT STATUS
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-----------
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0::
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One or more of the provided paths is ignored.
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1::
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None of the provided paths are ignored.
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128::
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A fatal error was encountered.
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SEE ALSO
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--------
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linkgit:gitignore[5]
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linkgit:gitconfig[5]
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linkgit:git-ls-files[5]
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GIT
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---
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Part of the linkgit:git[1] suite
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