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1st chunk of `Documentation/git-grep.adoc`
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git-grep(1)
===========

NAME
----
git-grep - Print lines matching a pattern


SYNOPSIS
--------
[verse]
'git grep' [-a | --text] [-I] [--textconv] [-i | --ignore-case] [-w | --word-regexp]
	   [-v | --invert-match] [-h|-H] [--full-name]
	   [-E | --extended-regexp] [-G | --basic-regexp]
	   [-P | --perl-regexp]
	   [-F | --fixed-strings] [-n | --line-number] [--column]
	   [-l | --files-with-matches] [-L | --files-without-match]
	   [(-O | --open-files-in-pager) [<pager>]]
	   [-z | --null]
	   [ -o | --only-matching ] [-c | --count] [--all-match] [-q | --quiet]
	   [--max-depth <depth>] [--[no-]recursive]
	   [--color[=<when>] | --no-color]
	   [--break] [--heading] [-p | --show-function]
	   [-A <post-context>] [-B <pre-context>] [-C <context>]
	   [-W | --function-context]
	   [(-m | --max-count) <num>]
	   [--threads <num>]
	   [-f <file>] [-e] <pattern>
	   [--and|--or|--not|(|)|-e <pattern>...]
	   [--recurse-submodules] [--parent-basename <basename>]
	   [ [--[no-]exclude-standard] [--cached | --untracked | --no-index] | <tree>...]
	   [--] [<pathspec>...]

DESCRIPTION
-----------
Look for specified patterns in the tracked files in the work tree, blobs
registered in the index file, or blobs in given tree objects.  Patterns
are lists of one or more search expressions separated by newline
characters.  An empty string as search expression matches all lines.


OPTIONS
-------
--cached::
	Instead of searching tracked files in the working tree, search
	blobs registered in the index file.

--untracked::
	In addition to searching in the tracked files in the working
	tree, search also in untracked files.

--no-index::
	Search files in the current directory that is not managed by Git,
	or by ignoring that the current directory is managed by Git.  This
	is rather similar to running the regular `grep(1)` utility with its
	`-r` option specified, but with some additional benefits, such as
	using pathspec patterns to limit paths;  see the 'pathspec' entry
	in linkgit:gitglossary[7] for more information.
+
This option cannot be used together with `--cached` or `--untracked`.
See also `grep.fallbackToNoIndex` in 'CONFIGURATION' below.

--no-exclude-standard::
	Also search in ignored files by not honoring the `.gitignore`
	mechanism. Only useful with `--untracked`.

--exclude-standard::
	Do not pay attention to ignored files specified via the `.gitignore`
	mechanism.  Only useful when searching files in the current directory
	with `--no-index`.

--recurse-submodules::
	Recursively search in each submodule that is active and
	checked out in the repository.  When used in combination with the
	_<tree>_ option the prefix of all submodule output will be the name of
	the parent project's _<tree>_ object.  This option cannot be used together
	with `--untracked`, and it has no effect if `--no-index` is specified.

-a::
--text::
	Process binary files as if they were text.

--textconv::
	Honor textconv filter settings.

--no-textconv::
	Do not honor textconv filter settings.
	This is the default.

-i::
--ignore-case::
	Ignore case differences between the patterns and the
	files.

-I::
	Don't match the pattern in binary files.

--max-depth <depth>::
	For each <pathspec> given on command line, descend at most <depth>
	levels of directories. A value of -1 means no limit.
	This option is ignored if <pathspec> contains active wildcards.
	In other words if "a*" matches a directory named "a*",
	"*" is matched literally so --max-depth is still effective.

-r::
--recursive::
	Same as `--max-depth=-1`; this is the default.

--no-recursive::
	Same as `--max-depth=0`.

-w::
--word-regexp::
	Match the pattern only at word boundary (either begin at the
	beginning of a line, or preceded by a non-word character; end at
	the end of a line or followed by a non-word character).

-v::
--invert-match::
	Select non-matching lines.

-h::
-H::
	By default, the command shows the filename for each
	match.  `-h` option is used to suppress this output.
	`-H` is there for completeness

Title: Git Grep Command
Summary
The git-grep command is used to search for specified patterns in tracked files, index files, or blobs in given tree objects, with various options to customize the search, such as ignoring case, searching in binary files, and limiting the search depth.