git/Documentation/git.txt

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Исходник Обычный вид История

git(1)
======
NAME
----
git - the stupid content tracker
SYNOPSIS
--------
[verse]
'git' [--version] [--help] [-C <path>] [-c <name>=<value>]
[--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]
[-p|--paginate|--no-pager] [--no-replace-objects] [--bare]
[--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]
<command> [<args>]
DESCRIPTION
-----------
Git is a fast, scalable, distributed revision control system with an
unusually rich command set that provides both high-level operations
and full access to internals.
See linkgit:gittutorial[7] to get started, then see
linkgit:giteveryday[7] for a useful minimum set of
commands. The link:user-manual.html[Git User's Manual] has a more
in-depth introduction.
After you mastered the basic concepts, you can come back to this
page to learn what commands Git offers. You can learn more about
individual Git commands with "git help command". linkgit:gitcli[7]
manual page gives you an overview of the command-line command syntax.
A formatted and hyperlinked copy of the latest Git documentation
can be viewed at `https://git.github.io/htmldocs/git.html`.
ifdef::stalenotes[]
[NOTE]
============
You are reading the documentation for the latest (possibly
unreleased) version of Git, that is available from the 'master'
branch of the `git.git` repository.
Documentation for older releases are available here:
* link:v2.9.3/git.html[documentation for release 2.9.3]
* release notes for
link:RelNotes/2.9.3.txt[2.9.3],
link:RelNotes/2.9.2.txt[2.9.2],
link:RelNotes/2.9.1.txt[2.9.1],
link:RelNotes/2.9.0.txt[2.9].
* link:v2.8.4/git.html[documentation for release 2.8.4]
* release notes for
link:RelNotes/2.8.4.txt[2.8.4],
link:RelNotes/2.8.3.txt[2.8.3],
link:RelNotes/2.8.2.txt[2.8.2],
link:RelNotes/2.8.1.txt[2.8.1],
link:RelNotes/2.8.0.txt[2.8].
* link:v2.7.3/git.html[documentation for release 2.7.3]
* release notes for
link:RelNotes/2.7.3.txt[2.7.3],
link:RelNotes/2.7.2.txt[2.7.2],
link:RelNotes/2.7.1.txt[2.7.1],
link:RelNotes/2.7.0.txt[2.7].
* link:v2.6.6/git.html[documentation for release 2.6.6]
* release notes for
link:RelNotes/2.6.6.txt[2.6.6],
link:RelNotes/2.6.5.txt[2.6.5],
link:RelNotes/2.6.4.txt[2.6.4],
link:RelNotes/2.6.3.txt[2.6.3],
link:RelNotes/2.6.2.txt[2.6.2],
link:RelNotes/2.6.1.txt[2.6.1],
link:RelNotes/2.6.0.txt[2.6].
* link:v2.5.5/git.html[documentation for release 2.5.5]
* release notes for
link:RelNotes/2.5.5.txt[2.5.5],
link:RelNotes/2.5.4.txt[2.5.4],
link:RelNotes/2.5.3.txt[2.5.3],
link:RelNotes/2.5.2.txt[2.5.2],
link:RelNotes/2.5.1.txt[2.5.1],
link:RelNotes/2.5.0.txt[2.5].
* link:v2.4.11/git.html[documentation for release 2.4.11]
* release notes for
link:RelNotes/2.4.11.txt[2.4.11],
link:RelNotes/2.4.10.txt[2.4.10],
link:RelNotes/2.4.9.txt[2.4.9],
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link:RelNotes/2.4.7.txt[2.4.7],
link:RelNotes/2.4.6.txt[2.4.6],
link:RelNotes/2.4.5.txt[2.4.5],
link:RelNotes/2.4.4.txt[2.4.4],
link:RelNotes/2.4.3.txt[2.4.3],
link:RelNotes/2.4.2.txt[2.4.2],
link:RelNotes/2.4.1.txt[2.4.1],
link:RelNotes/2.4.0.txt[2.4].
* link:v2.3.10/git.html[documentation for release 2.3.10]
* release notes for
link:RelNotes/2.3.10.txt[2.3.10],
link:RelNotes/2.3.9.txt[2.3.9],
link:RelNotes/2.3.8.txt[2.3.8],
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link:RelNotes/2.3.1.txt[2.3.1],
link:RelNotes/2.3.0.txt[2.3].
* link:v2.2.3/git.html[documentation for release 2.2.3]
* release notes for
link:RelNotes/2.2.3.txt[2.2.3],
link:RelNotes/2.2.2.txt[2.2.2],
link:RelNotes/2.2.1.txt[2.2.1],
link:RelNotes/2.2.0.txt[2.2].
* link:v2.1.4/git.html[documentation for release 2.1.4]
* release notes for
link:RelNotes/2.1.4.txt[2.1.4],
link:RelNotes/2.1.3.txt[2.1.3],
link:RelNotes/2.1.2.txt[2.1.2],
link:RelNotes/2.1.1.txt[2.1.1],
link:RelNotes/2.1.0.txt[2.1].
* link:v2.0.5/git.html[documentation for release 2.0.5]
2014-05-28 22:04:19 +04:00
* release notes for
link:RelNotes/2.0.5.txt[2.0.5],
link:RelNotes/2.0.4.txt[2.0.4],
link:RelNotes/2.0.3.txt[2.0.3],
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2014-05-28 22:04:19 +04:00
link:RelNotes/2.0.0.txt[2.0.0].
* link:v1.9.5/git.html[documentation for release 1.9.5]
* release notes for
link:RelNotes/1.9.5.txt[1.9.5],
link:RelNotes/1.9.4.txt[1.9.4],
link:RelNotes/1.9.3.txt[1.9.3],
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link:RelNotes/1.9.0.txt[1.9.0].
* link:v1.8.5.6/git.html[documentation for release 1.8.5.6]
* release notes for
link:RelNotes/1.8.5.6.txt[1.8.5.6],
link:RelNotes/1.8.5.5.txt[1.8.5.5],
link:RelNotes/1.8.5.4.txt[1.8.5.4],
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link:RelNotes/1.8.5.txt[1.8.5].
* link:v1.8.4.5/git.html[documentation for release 1.8.4.5]
* release notes for
link:RelNotes/1.8.4.5.txt[1.8.4.5],
link:RelNotes/1.8.4.4.txt[1.8.4.4],
link:RelNotes/1.8.4.3.txt[1.8.4.3],
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link:RelNotes/1.8.4.txt[1.8.4].
* link:v1.8.3.4/git.html[documentation for release 1.8.3.4]
* release notes for
link:RelNotes/1.8.3.4.txt[1.8.3.4],
link:RelNotes/1.8.3.3.txt[1.8.3.3],
link:RelNotes/1.8.3.2.txt[1.8.3.2],
link:RelNotes/1.8.3.1.txt[1.8.3.1],
link:RelNotes/1.8.3.txt[1.8.3].
* link:v1.8.2.3/git.html[documentation for release 1.8.2.3]
* release notes for
link:RelNotes/1.8.2.3.txt[1.8.2.3],
link:RelNotes/1.8.2.2.txt[1.8.2.2],
link:RelNotes/1.8.2.1.txt[1.8.2.1],
link:RelNotes/1.8.2.txt[1.8.2].
* link:v1.8.1.6/git.html[documentation for release 1.8.1.6]
* release notes for
link:RelNotes/1.8.1.6.txt[1.8.1.6],
link:RelNotes/1.8.1.5.txt[1.8.1.5],
link:RelNotes/1.8.1.4.txt[1.8.1.4],
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* link:v1.8.0.3/git.html[documentation for release 1.8.0.3]
* release notes for
link:RelNotes/1.8.0.3.txt[1.8.0.3],
link:RelNotes/1.8.0.2.txt[1.8.0.2],
link:RelNotes/1.8.0.1.txt[1.8.0.1],
link:RelNotes/1.8.0.txt[1.8.0].
* link:v1.7.12.4/git.html[documentation for release 1.7.12.4]
* release notes for
link:RelNotes/1.7.12.4.txt[1.7.12.4],
link:RelNotes/1.7.12.3.txt[1.7.12.3],
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link:RelNotes/1.7.12.txt[1.7.12].
* link:v1.7.11.7/git.html[documentation for release 1.7.11.7]
* release notes for
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* link:v1.7.10.5/git.html[documentation for release 1.7.10.5]
* release notes for
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* link:v1.7.9.7/git.html[documentation for release 1.7.9.7]
* release notes for
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* link:v1.7.8.6/git.html[documentation for release 1.7.8.6]
* release notes for
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* link:v1.7.7.7/git.html[documentation for release 1.7.7.7]
* release notes for
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* link:v1.7.6.6/git.html[documentation for release 1.7.6.6]
* release notes for
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* link:v1.7.5.4/git.html[documentation for release 1.7.5.4]
* release notes for
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* link:v1.7.4.5/git.html[documentation for release 1.7.4.5]
* release notes for
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* link:v1.7.3.5/git.html[documentation for release 1.7.3.5]
* release notes for
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* link:v1.7.2.5/git.html[documentation for release 1.7.2.5]
* release notes for
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* link:v1.7.1.4/git.html[documentation for release 1.7.1.4]
* release notes for
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* link:v1.7.0.9/git.html[documentation for release 1.7.0.9]
* release notes for
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* release notes for
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link:RelNotes/1.5.2.4.txt[1.5.2.4],
link:RelNotes/1.5.2.3.txt[1.5.2.3],
link:RelNotes/1.5.2.2.txt[1.5.2.2],
link:RelNotes/1.5.2.1.txt[1.5.2.1],
link:RelNotes/1.5.2.txt[1.5.2].
* link:v1.5.1.6/git.html[documentation for release 1.5.1.6]
* release notes for
link:RelNotes/1.5.1.6.txt[1.5.1.6],
link:RelNotes/1.5.1.5.txt[1.5.1.5],
link:RelNotes/1.5.1.4.txt[1.5.1.4],
link:RelNotes/1.5.1.3.txt[1.5.1.3],
link:RelNotes/1.5.1.2.txt[1.5.1.2],
link:RelNotes/1.5.1.1.txt[1.5.1.1],
link:RelNotes/1.5.1.txt[1.5.1].
* link:v1.5.0.7/git.html[documentation for release 1.5.0.7]
* release notes for
link:RelNotes/1.5.0.7.txt[1.5.0.7],
link:RelNotes/1.5.0.6.txt[1.5.0.6],
link:RelNotes/1.5.0.5.txt[1.5.0.5],
link:RelNotes/1.5.0.3.txt[1.5.0.3],
link:RelNotes/1.5.0.2.txt[1.5.0.2],
link:RelNotes/1.5.0.1.txt[1.5.0.1],
link:RelNotes/1.5.0.txt[1.5.0].
* documentation for release link:v1.4.4.4/git.html[1.4.4.4],
link:v1.3.3/git.html[1.3.3],
link:v1.2.6/git.html[1.2.6],
link:v1.0.13/git.html[1.0.13].
============
endif::stalenotes[]
OPTIONS
-------
--version::
Prints the Git suite version that the 'git' program came from.
--help::
Prints the synopsis and a list of the most commonly used
commands. If the option `--all` or `-a` is given then all
available commands are printed. If a Git command is named this
option will bring up the manual page for that command.
+
Other options are available to control how the manual page is
displayed. See linkgit:git-help[1] for more information,
because `git --help ...` is converted internally into `git
help ...`.
-C <path>::
Run as if git was started in '<path>' instead of the current working
directory. When multiple `-C` options are given, each subsequent
non-absolute `-C <path>` is interpreted relative to the preceding `-C
<path>`.
+
This option affects options that expect path name like `--git-dir` and
`--work-tree` in that their interpretations of the path names would be
made relative to the working directory caused by the `-C` option. For
example the following invocations are equivalent:
git --git-dir=a.git --work-tree=b -C c status
git --git-dir=c/a.git --work-tree=c/b status
-c <name>=<value>::
Pass a configuration parameter to the command. The value
given will override values from configuration files.
The <name> is expected in the same format as listed by
'git config' (subkeys separated by dots).
+
Note that omitting the `=` in `git -c foo.bar ...` is allowed and sets
`foo.bar` to the boolean true value (just like `[foo]bar` would in a
config file). Including the equals but with an empty value (like `git -c
foo.bar= ...`) sets `foo.bar` to the empty string.
--exec-path[=<path>]::
Path to wherever your core Git programs are installed.
This can also be controlled by setting the GIT_EXEC_PATH
environment variable. If no path is given, 'git' will print
the current setting and then exit.
--html-path::
Print the path, without trailing slash, where Git's HTML
documentation is installed and exit.
--man-path::
Print the manpath (see `man(1)`) for the man pages for
this version of Git and exit.
--info-path::
Print the path where the Info files documenting this
version of Git are installed and exit.
-p::
--paginate::
Pipe all output into 'less' (or if set, $PAGER) if standard
output is a terminal. This overrides the `pager.<cmd>`
configuration options (see the "Configuration Mechanism" section
below).
--no-pager::
Do not pipe Git output into a pager.
--git-dir=<path>::
Set the path to the repository. This can also be controlled by
setting the `GIT_DIR` environment variable. It can be an absolute
path or relative path to current working directory.
introduce GIT_WORK_TREE to specify the work tree setup_gdg is used as abbreviation for setup_git_directory_gently. The work tree can be specified using the environment variable GIT_WORK_TREE and the config option core.worktree (the environment variable has precendence over the config option). Additionally there is a command line option --work-tree which sets the environment variable. setup_gdg does the following now: GIT_DIR unspecified repository in .git directory parent directory of the .git directory is used as work tree, GIT_WORK_TREE is ignored GIT_DIR unspecified repository in cwd GIT_DIR is set to cwd see the cases with GIT_DIR specified what happens next and also see the note below GIT_DIR specified GIT_WORK_TREE/core.worktree unspecified cwd is used as work tree GIT_DIR specified GIT_WORK_TREE/core.worktree specified the specified work tree is used Note on the case where GIT_DIR is unspecified and repository is in cwd: GIT_WORK_TREE is used but is_inside_git_dir is always true. I did it this way because setup_gdg might be called multiple times (e.g. when doing alias expansion) and in successive calls setup_gdg should do the same thing every time. Meaning of is_bare/is_inside_work_tree/is_inside_git_dir: (1) is_bare_repository A repository is bare if core.bare is true or core.bare is unspecified and the name suggests it is bare (directory not named .git). The bare option disables a few protective checks which are useful with a working tree. Currently this changes if a repository is bare: updates of HEAD are allowed git gc packs the refs the reflog is disabled by default (2) is_inside_work_tree True if the cwd is inside the associated working tree (if there is one), false otherwise. (3) is_inside_git_dir True if the cwd is inside the git directory, false otherwise. Before this patch is_inside_git_dir was always true for bare repositories. When setup_gdg finds a repository git_config(git_default_config) is always called. This ensure that is_bare_repository makes use of core.bare and does not guess even though core.bare is specified. inside_work_tree and inside_git_dir are set if setup_gdg finds a repository. The is_inside_work_tree and is_inside_git_dir functions will die if they are called before a successful call to setup_gdg. Signed-off-by: Matthias Lederhofer <matled@gmx.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-06 11:10:42 +04:00
--work-tree=<path>::
Set the path to the working tree. It can be an absolute path
or a path relative to the current working directory.
introduce GIT_WORK_TREE to specify the work tree setup_gdg is used as abbreviation for setup_git_directory_gently. The work tree can be specified using the environment variable GIT_WORK_TREE and the config option core.worktree (the environment variable has precendence over the config option). Additionally there is a command line option --work-tree which sets the environment variable. setup_gdg does the following now: GIT_DIR unspecified repository in .git directory parent directory of the .git directory is used as work tree, GIT_WORK_TREE is ignored GIT_DIR unspecified repository in cwd GIT_DIR is set to cwd see the cases with GIT_DIR specified what happens next and also see the note below GIT_DIR specified GIT_WORK_TREE/core.worktree unspecified cwd is used as work tree GIT_DIR specified GIT_WORK_TREE/core.worktree specified the specified work tree is used Note on the case where GIT_DIR is unspecified and repository is in cwd: GIT_WORK_TREE is used but is_inside_git_dir is always true. I did it this way because setup_gdg might be called multiple times (e.g. when doing alias expansion) and in successive calls setup_gdg should do the same thing every time. Meaning of is_bare/is_inside_work_tree/is_inside_git_dir: (1) is_bare_repository A repository is bare if core.bare is true or core.bare is unspecified and the name suggests it is bare (directory not named .git). The bare option disables a few protective checks which are useful with a working tree. Currently this changes if a repository is bare: updates of HEAD are allowed git gc packs the refs the reflog is disabled by default (2) is_inside_work_tree True if the cwd is inside the associated working tree (if there is one), false otherwise. (3) is_inside_git_dir True if the cwd is inside the git directory, false otherwise. Before this patch is_inside_git_dir was always true for bare repositories. When setup_gdg finds a repository git_config(git_default_config) is always called. This ensure that is_bare_repository makes use of core.bare and does not guess even though core.bare is specified. inside_work_tree and inside_git_dir are set if setup_gdg finds a repository. The is_inside_work_tree and is_inside_git_dir functions will die if they are called before a successful call to setup_gdg. Signed-off-by: Matthias Lederhofer <matled@gmx.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-06 11:10:42 +04:00
This can also be controlled by setting the GIT_WORK_TREE
environment variable and the core.worktree configuration
variable (see core.worktree in linkgit:git-config[1] for a
more detailed discussion).
introduce GIT_WORK_TREE to specify the work tree setup_gdg is used as abbreviation for setup_git_directory_gently. The work tree can be specified using the environment variable GIT_WORK_TREE and the config option core.worktree (the environment variable has precendence over the config option). Additionally there is a command line option --work-tree which sets the environment variable. setup_gdg does the following now: GIT_DIR unspecified repository in .git directory parent directory of the .git directory is used as work tree, GIT_WORK_TREE is ignored GIT_DIR unspecified repository in cwd GIT_DIR is set to cwd see the cases with GIT_DIR specified what happens next and also see the note below GIT_DIR specified GIT_WORK_TREE/core.worktree unspecified cwd is used as work tree GIT_DIR specified GIT_WORK_TREE/core.worktree specified the specified work tree is used Note on the case where GIT_DIR is unspecified and repository is in cwd: GIT_WORK_TREE is used but is_inside_git_dir is always true. I did it this way because setup_gdg might be called multiple times (e.g. when doing alias expansion) and in successive calls setup_gdg should do the same thing every time. Meaning of is_bare/is_inside_work_tree/is_inside_git_dir: (1) is_bare_repository A repository is bare if core.bare is true or core.bare is unspecified and the name suggests it is bare (directory not named .git). The bare option disables a few protective checks which are useful with a working tree. Currently this changes if a repository is bare: updates of HEAD are allowed git gc packs the refs the reflog is disabled by default (2) is_inside_work_tree True if the cwd is inside the associated working tree (if there is one), false otherwise. (3) is_inside_git_dir True if the cwd is inside the git directory, false otherwise. Before this patch is_inside_git_dir was always true for bare repositories. When setup_gdg finds a repository git_config(git_default_config) is always called. This ensure that is_bare_repository makes use of core.bare and does not guess even though core.bare is specified. inside_work_tree and inside_git_dir are set if setup_gdg finds a repository. The is_inside_work_tree and is_inside_git_dir functions will die if they are called before a successful call to setup_gdg. Signed-off-by: Matthias Lederhofer <matled@gmx.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-06 11:10:42 +04:00
--namespace=<path>::
Set the Git namespace. See linkgit:gitnamespaces[7] for more
details. Equivalent to setting the `GIT_NAMESPACE` environment
variable.
--bare::
Treat the repository as a bare repository. If GIT_DIR
environment is not set, it is set to the current working
directory.
--no-replace-objects::
Do not use replacement refs to replace Git objects. See
linkgit:git-replace[1] for more information.
add global --literal-pathspecs option Git takes pathspec arguments in many places to limit the scope of an operation. These pathspecs are treated not as literal paths, but as glob patterns that can be fed to fnmatch. When a user is giving a specific pattern, this is a nice feature. However, when programatically providing pathspecs, it can be a nuisance. For example, to find the latest revision which modified "$foo", one can use "git rev-list -- $foo". But if "$foo" contains glob characters (e.g., "f*"), it will erroneously match more entries than desired. The caller needs to quote the characters in $foo, and even then, the results may not be exactly the same as with a literal pathspec. For instance, the depth checks in match_pathspec_depth do not kick in if we match via fnmatch. This patch introduces a global command-line option (i.e., one for "git" itself, not for specific commands) to turn this behavior off. It also has a matching environment variable, which can make it easier if you are a script or porcelain interface that is going to issue many such commands. This option cannot turn off globbing for particular pathspecs. That could eventually be done with a ":(noglob)" magic pathspec prefix. However, that level of granularity is more cumbersome to use for many cases, and doing ":(noglob)" right would mean converting the whole codebase to use "struct pathspec", as the usual "const char **pathspec" cannot represent extra per-item flags. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-12-20 02:37:30 +04:00
--literal-pathspecs::
Treat pathspecs literally (i.e. no globbing, no pathspec magic).
This is equivalent to setting the `GIT_LITERAL_PATHSPECS` environment
add global --literal-pathspecs option Git takes pathspec arguments in many places to limit the scope of an operation. These pathspecs are treated not as literal paths, but as glob patterns that can be fed to fnmatch. When a user is giving a specific pattern, this is a nice feature. However, when programatically providing pathspecs, it can be a nuisance. For example, to find the latest revision which modified "$foo", one can use "git rev-list -- $foo". But if "$foo" contains glob characters (e.g., "f*"), it will erroneously match more entries than desired. The caller needs to quote the characters in $foo, and even then, the results may not be exactly the same as with a literal pathspec. For instance, the depth checks in match_pathspec_depth do not kick in if we match via fnmatch. This patch introduces a global command-line option (i.e., one for "git" itself, not for specific commands) to turn this behavior off. It also has a matching environment variable, which can make it easier if you are a script or porcelain interface that is going to issue many such commands. This option cannot turn off globbing for particular pathspecs. That could eventually be done with a ":(noglob)" magic pathspec prefix. However, that level of granularity is more cumbersome to use for many cases, and doing ":(noglob)" right would mean converting the whole codebase to use "struct pathspec", as the usual "const char **pathspec" cannot represent extra per-item flags. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-12-20 02:37:30 +04:00
variable to `1`.
--glob-pathspecs::
Add "glob" magic to all pathspec. This is equivalent to setting
the `GIT_GLOB_PATHSPECS` environment variable to `1`. Disabling
globbing on individual pathspecs can be done using pathspec
magic ":(literal)"
--noglob-pathspecs::
Add "literal" magic to all pathspec. This is equivalent to setting
the `GIT_NOGLOB_PATHSPECS` environment variable to `1`. Enabling
globbing on individual pathspecs can be done using pathspec
magic ":(glob)"
--icase-pathspecs::
Add "icase" magic to all pathspec. This is equivalent to setting
the `GIT_ICASE_PATHSPECS` environment variable to `1`.
GIT COMMANDS
------------
We divide Git into high level ("porcelain") commands and low level
("plumbing") commands.
High-level commands (porcelain)
-------------------------------
We separate the porcelain commands into the main commands and some
ancillary user utilities.
Main porcelain commands
~~~~~~~~~~~~~~~~~~~~~~~
include::cmds-mainporcelain.txt[]
Ancillary Commands
~~~~~~~~~~~~~~~~~~
Manipulators:
include::cmds-ancillarymanipulators.txt[]
Interrogators:
include::cmds-ancillaryinterrogators.txt[]
Interacting with Others
~~~~~~~~~~~~~~~~~~~~~~~
These commands are to interact with foreign SCM and with other
people via patch over e-mail.
include::cmds-foreignscminterface.txt[]
Low-level commands (plumbing)
-----------------------------
Although Git includes its
own porcelain layer, its low-level commands are sufficient to support
development of alternative porcelains. Developers of such porcelains
might start by reading about linkgit:git-update-index[1] and
linkgit:git-read-tree[1].
The interface (input, output, set of options and the semantics)
to these low-level commands are meant to be a lot more stable
than Porcelain level commands, because these commands are
primarily for scripted use. The interface to Porcelain commands
on the other hand are subject to change in order to improve the
end user experience.
The following description divides
the low-level commands into commands that manipulate objects (in
the repository, index, and working tree), commands that interrogate and
compare objects, and commands that move objects and references between
repositories.
Manipulation commands
~~~~~~~~~~~~~~~~~~~~~
include::cmds-plumbingmanipulators.txt[]
Interrogation commands
~~~~~~~~~~~~~~~~~~~~~~
include::cmds-plumbinginterrogators.txt[]
In general, the interrogate commands do not touch the files in
the working tree.
Synching repositories
~~~~~~~~~~~~~~~~~~~~~
include::cmds-synchingrepositories.txt[]
The following are helper commands used by the above; end users
typically do not use them directly.
include::cmds-synchelpers.txt[]
Internal helper commands
~~~~~~~~~~~~~~~~~~~~~~~~
These are internal helper commands used by other commands; end
users typically do not use them directly.
include::cmds-purehelpers.txt[]
Configuration Mechanism
-----------------------
Git uses a simple text format to store customizations that are per
repository and are per user. Such a configuration file may look
like this:
------------
#
# A '#' or ';' character indicates a comment.
#
; core variables
[core]
; Don't trust file modes
filemode = false
; user identity
[user]
name = "Junio C Hamano"
email = "gitster@pobox.com"
------------
Various commands read from the configuration file and adjust
their operation accordingly. See linkgit:git-config[1] for a
list and more details about the configuration mechanism.
Identifier Terminology
----------------------
<object>::
Indicates the object name for any type of object.
<blob>::
Indicates a blob object name.
<tree>::
Indicates a tree object name.
<commit>::
Indicates a commit object name.
<tree-ish>::
Indicates a tree, commit or tag object name. A
command that takes a <tree-ish> argument ultimately wants to
operate on a <tree> object but automatically dereferences
<commit> and <tag> objects that point at a <tree>.
<commit-ish>::
Indicates a commit or tag object name. A
command that takes a <commit-ish> argument ultimately wants to
operate on a <commit> object but automatically dereferences
<tag> objects that point at a <commit>.
<type>::
Indicates that an object type is required.
Currently one of: `blob`, `tree`, `commit`, or `tag`.
<file>::
Indicates a filename - almost always relative to the
root of the tree structure `GIT_INDEX_FILE` describes.
Symbolic Identifiers
--------------------
Any Git command accepting any <object> can also use the following
symbolic notation:
HEAD::
indicates the head of the current branch.
<tag>::
a valid tag 'name'
(i.e. a `refs/tags/<tag>` reference).
<head>::
a valid head 'name'
(i.e. a `refs/heads/<head>` reference).
For a more complete list of ways to spell object names, see
"SPECIFYING REVISIONS" section in linkgit:gitrevisions[7].
File/Directory Structure
------------------------
Please see the linkgit:gitrepository-layout[5] document.
Read linkgit:githooks[5] for more details about each hook.
Higher level SCMs may provide and manage additional information in the
`$GIT_DIR`.
Terminology
-----------
Please see linkgit:gitglossary[7].
Environment Variables
---------------------
Various Git commands use the following environment variables:
The Git Repository
~~~~~~~~~~~~~~~~~~
These environment variables apply to 'all' core Git commands. Nb: it
is worth noting that they may be used/overridden by SCMS sitting above
Git so take care if using a foreign front-end.
`GIT_INDEX_FILE`::
This environment allows the specification of an alternate
index file. If not specified, the default of `$GIT_DIR/index`
is used.
`GIT_INDEX_VERSION`::
This environment variable allows the specification of an index
version for new repositories. It won't affect existing index
files. By default index file version 2 or 3 is used. See
linkgit:git-update-index[1] for more information.
`GIT_OBJECT_DIRECTORY`::
If the object storage directory is specified via this
environment variable then the sha1 directories are created
underneath - otherwise the default `$GIT_DIR/objects`
directory is used.
`GIT_ALTERNATE_OBJECT_DIRECTORIES`::
Due to the immutable nature of Git objects, old objects can be
archived into shared, read-only directories. This variable
specifies a ":" separated (on Windows ";" separated) list
of Git object directories which can be used to search for Git
objects. New objects will not be written to these directories.
`GIT_DIR`::
If the `GIT_DIR` environment variable is set then it
specifies a path to use instead of the default `.git`
for the base of the repository.
The `--git-dir` command-line option also sets this value.
`GIT_WORK_TREE`::
Set the path to the root of the working tree.
This can also be controlled by the `--work-tree` command-line
introduce GIT_WORK_TREE to specify the work tree setup_gdg is used as abbreviation for setup_git_directory_gently. The work tree can be specified using the environment variable GIT_WORK_TREE and the config option core.worktree (the environment variable has precendence over the config option). Additionally there is a command line option --work-tree which sets the environment variable. setup_gdg does the following now: GIT_DIR unspecified repository in .git directory parent directory of the .git directory is used as work tree, GIT_WORK_TREE is ignored GIT_DIR unspecified repository in cwd GIT_DIR is set to cwd see the cases with GIT_DIR specified what happens next and also see the note below GIT_DIR specified GIT_WORK_TREE/core.worktree unspecified cwd is used as work tree GIT_DIR specified GIT_WORK_TREE/core.worktree specified the specified work tree is used Note on the case where GIT_DIR is unspecified and repository is in cwd: GIT_WORK_TREE is used but is_inside_git_dir is always true. I did it this way because setup_gdg might be called multiple times (e.g. when doing alias expansion) and in successive calls setup_gdg should do the same thing every time. Meaning of is_bare/is_inside_work_tree/is_inside_git_dir: (1) is_bare_repository A repository is bare if core.bare is true or core.bare is unspecified and the name suggests it is bare (directory not named .git). The bare option disables a few protective checks which are useful with a working tree. Currently this changes if a repository is bare: updates of HEAD are allowed git gc packs the refs the reflog is disabled by default (2) is_inside_work_tree True if the cwd is inside the associated working tree (if there is one), false otherwise. (3) is_inside_git_dir True if the cwd is inside the git directory, false otherwise. Before this patch is_inside_git_dir was always true for bare repositories. When setup_gdg finds a repository git_config(git_default_config) is always called. This ensure that is_bare_repository makes use of core.bare and does not guess even though core.bare is specified. inside_work_tree and inside_git_dir are set if setup_gdg finds a repository. The is_inside_work_tree and is_inside_git_dir functions will die if they are called before a successful call to setup_gdg. Signed-off-by: Matthias Lederhofer <matled@gmx.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-06 11:10:42 +04:00
option and the core.worktree configuration variable.
`GIT_NAMESPACE`::
Set the Git namespace; see linkgit:gitnamespaces[7] for details.
The `--namespace` command-line option also sets this value.
`GIT_CEILING_DIRECTORIES`::
Provide a mechanism to turn off symlink resolution in ceiling paths Commit 1b77d83cab 'setup_git_directory_gently_1(): resolve symlinks in ceiling paths' changed the setup code to resolve symlinks in the entries in GIT_CEILING_DIRECTORIES. Because those entries are compared textually to the symlink-resolved current directory, an entry in GIT_CEILING_DIRECTORIES that contained a symlink would have no effect. It was known that this could cause performance problems if the symlink resolution *itself* touched slow filesystems, but it was thought that such use cases would be unlikely. The intention of the earlier change was to deal with a case when the user has this: GIT_CEILING_DIRECTORIES=/home/gitster but in reality, /home/gitster is a symbolic link to somewhere else, e.g. /net/machine/home4/gitster. A textual comparison between the specified value /home/gitster and the location getcwd(3) returns would not help us, but readlink("/home/gitster") would still be fast. After this change was released, Anders Kaseorg <andersk@mit.edu> reported: > [...] my computer has been acting so slow when I’m not connected to > the network. I put various network filesystem paths in > $GIT_CEILING_DIRECTORIES, such as > /afs/athena.mit.edu/user/a/n/andersk (to avoid hitting its parents > /afs/athena.mit.edu, /afs/athena.mit.edu/user/a, and > /afs/athena.mit.edu/user/a/n which all live in different AFS > volumes). Now when I’m not connected to the network, every > invocation of Git, including the __git_ps1 in my shell prompt, waits > for AFS to timeout. To allow users to work around this problem, give them a mechanism to turn off symlink resolution in GIT_CEILING_DIRECTORIES entries. All the entries that follow an empty entry will not be checked for symbolic links and used literally in comparison. E.g. with these: GIT_CEILING_DIRECTORIES=:/foo/bar:/xyzzy or GIT_CEILING_DIRECTORIES=/foo/bar::/xyzzy we will not readlink("/xyzzy") because it comes after an empty entry. With the former (but not with the latter), "/foo/bar" comes after an empty entry, and we will not readlink it, either. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-02-20 13:09:24 +04:00
This should be a colon-separated list of absolute paths. If
set, it is a list of directories that Git should not chdir up
Provide a mechanism to turn off symlink resolution in ceiling paths Commit 1b77d83cab 'setup_git_directory_gently_1(): resolve symlinks in ceiling paths' changed the setup code to resolve symlinks in the entries in GIT_CEILING_DIRECTORIES. Because those entries are compared textually to the symlink-resolved current directory, an entry in GIT_CEILING_DIRECTORIES that contained a symlink would have no effect. It was known that this could cause performance problems if the symlink resolution *itself* touched slow filesystems, but it was thought that such use cases would be unlikely. The intention of the earlier change was to deal with a case when the user has this: GIT_CEILING_DIRECTORIES=/home/gitster but in reality, /home/gitster is a symbolic link to somewhere else, e.g. /net/machine/home4/gitster. A textual comparison between the specified value /home/gitster and the location getcwd(3) returns would not help us, but readlink("/home/gitster") would still be fast. After this change was released, Anders Kaseorg <andersk@mit.edu> reported: > [...] my computer has been acting so slow when I’m not connected to > the network. I put various network filesystem paths in > $GIT_CEILING_DIRECTORIES, such as > /afs/athena.mit.edu/user/a/n/andersk (to avoid hitting its parents > /afs/athena.mit.edu, /afs/athena.mit.edu/user/a, and > /afs/athena.mit.edu/user/a/n which all live in different AFS > volumes). Now when I’m not connected to the network, every > invocation of Git, including the __git_ps1 in my shell prompt, waits > for AFS to timeout. To allow users to work around this problem, give them a mechanism to turn off symlink resolution in GIT_CEILING_DIRECTORIES entries. All the entries that follow an empty entry will not be checked for symbolic links and used literally in comparison. E.g. with these: GIT_CEILING_DIRECTORIES=:/foo/bar:/xyzzy or GIT_CEILING_DIRECTORIES=/foo/bar::/xyzzy we will not readlink("/xyzzy") because it comes after an empty entry. With the former (but not with the latter), "/foo/bar" comes after an empty entry, and we will not readlink it, either. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-02-20 13:09:24 +04:00
into while looking for a repository directory (useful for
excluding slow-loading network directories). It will not
exclude the current working directory or a GIT_DIR set on the
command line or in the environment. Normally, Git has to read
the entries in this list and resolve any symlink that
might be present in order to compare them with the current
directory. However, if even this access is slow, you
can add an empty entry to the list to tell Git that the
subsequent entries are not symlinks and needn't be resolved;
e.g.,
`GIT_CEILING_DIRECTORIES=/maybe/symlink::/very/slow/non/symlink`.
`GIT_DISCOVERY_ACROSS_FILESYSTEM`::
When run in a directory that does not have ".git" repository
directory, Git tries to find such a directory in the parent
directories to find the top of the working tree, but by default it
does not cross filesystem boundaries. This environment variable
can be set to true to tell Git not to stop at filesystem
boundaries. Like `GIT_CEILING_DIRECTORIES`, this will not affect
an explicit repository directory set via `GIT_DIR` or on the
command line.
`GIT_COMMON_DIR`::
$GIT_COMMON_DIR: a new environment variable This variable is intended to support multiple working directories attached to a repository. Such a repository may have a main working directory, created by either "git init" or "git clone" and one or more linked working directories. These working directories and the main repository share the same repository directory. In linked working directories, $GIT_COMMON_DIR must be defined to point to the real repository directory and $GIT_DIR points to an unused subdirectory inside $GIT_COMMON_DIR. File locations inside the repository are reorganized from the linked worktree view point: - worktree-specific such as HEAD, logs/HEAD, index, other top-level refs and unrecognized files are from $GIT_DIR. - the rest like objects, refs, info, hooks, packed-refs, shallow... are from $GIT_COMMON_DIR (except info/sparse-checkout, but that's a separate patch) Scripts are supposed to retrieve paths in $GIT_DIR with "git rev-parse --git-path", which will take care of "$GIT_DIR vs $GIT_COMMON_DIR" business. The redirection is done by git_path(), git_pathdup() and strbuf_git_path(). The selected list of paths goes to $GIT_COMMON_DIR, not the other way around in case a developer adds a new worktree-specific file and it's accidentally promoted to be shared across repositories (this includes unknown files added by third party commands) The list of known files that belong to $GIT_DIR are: ADD_EDIT.patch BISECT_ANCESTORS_OK BISECT_EXPECTED_REV BISECT_LOG BISECT_NAMES CHERRY_PICK_HEAD COMMIT_MSG FETCH_HEAD HEAD MERGE_HEAD MERGE_MODE MERGE_RR NOTES_EDITMSG NOTES_MERGE_WORKTREE ORIG_HEAD REVERT_HEAD SQUASH_MSG TAG_EDITMSG fast_import_crash_* logs/HEAD next-index-* rebase-apply rebase-merge rsync-refs-* sequencer/* shallow_* Path mapping is NOT done for git_path_submodule(). Multi-checkouts are not supported as submodules. Helped-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-11-30 11:24:36 +03:00
If this variable is set to a path, non-worktree files that are
normally in $GIT_DIR will be taken from this path
instead. Worktree-specific files such as HEAD or index are
taken from $GIT_DIR. See linkgit:gitrepository-layout[5] and
linkgit:git-worktree[1] for
$GIT_COMMON_DIR: a new environment variable This variable is intended to support multiple working directories attached to a repository. Such a repository may have a main working directory, created by either "git init" or "git clone" and one or more linked working directories. These working directories and the main repository share the same repository directory. In linked working directories, $GIT_COMMON_DIR must be defined to point to the real repository directory and $GIT_DIR points to an unused subdirectory inside $GIT_COMMON_DIR. File locations inside the repository are reorganized from the linked worktree view point: - worktree-specific such as HEAD, logs/HEAD, index, other top-level refs and unrecognized files are from $GIT_DIR. - the rest like objects, refs, info, hooks, packed-refs, shallow... are from $GIT_COMMON_DIR (except info/sparse-checkout, but that's a separate patch) Scripts are supposed to retrieve paths in $GIT_DIR with "git rev-parse --git-path", which will take care of "$GIT_DIR vs $GIT_COMMON_DIR" business. The redirection is done by git_path(), git_pathdup() and strbuf_git_path(). The selected list of paths goes to $GIT_COMMON_DIR, not the other way around in case a developer adds a new worktree-specific file and it's accidentally promoted to be shared across repositories (this includes unknown files added by third party commands) The list of known files that belong to $GIT_DIR are: ADD_EDIT.patch BISECT_ANCESTORS_OK BISECT_EXPECTED_REV BISECT_LOG BISECT_NAMES CHERRY_PICK_HEAD COMMIT_MSG FETCH_HEAD HEAD MERGE_HEAD MERGE_MODE MERGE_RR NOTES_EDITMSG NOTES_MERGE_WORKTREE ORIG_HEAD REVERT_HEAD SQUASH_MSG TAG_EDITMSG fast_import_crash_* logs/HEAD next-index-* rebase-apply rebase-merge rsync-refs-* sequencer/* shallow_* Path mapping is NOT done for git_path_submodule(). Multi-checkouts are not supported as submodules. Helped-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-11-30 11:24:36 +03:00
details. This variable has lower precedence than other path
variables such as GIT_INDEX_FILE, GIT_OBJECT_DIRECTORY...
Git Commits
~~~~~~~~~~~
`GIT_AUTHOR_NAME`::
`GIT_AUTHOR_EMAIL`::
`GIT_AUTHOR_DATE`::
`GIT_COMMITTER_NAME`::
`GIT_COMMITTER_EMAIL`::
`GIT_COMMITTER_DATE`::
'EMAIL'::
see linkgit:git-commit-tree[1]
Git Diffs
~~~~~~~~~
`GIT_DIFF_OPTS`::
Only valid setting is "--unified=??" or "-u??" to set the
number of context lines shown when a unified diff is created.
This takes precedence over any "-U" or "--unified" option
value passed on the Git diff command line.
`GIT_EXTERNAL_DIFF`::
When the environment variable `GIT_EXTERNAL_DIFF` is set, the
program named by it is called, instead of the diff invocation
described above. For a path that is added, removed, or modified,
`GIT_EXTERNAL_DIFF` is called with 7 parameters:
path old-file old-hex old-mode new-file new-hex new-mode
+
where:
<old|new>-file:: are files GIT_EXTERNAL_DIFF can use to read the
contents of <old|new>,
<old|new>-hex:: are the 40-hexdigit SHA-1 hashes,
<old|new>-mode:: are the octal representation of the file modes.
+
The file parameters can point at the user's working file
(e.g. `new-file` in "git-diff-files"), `/dev/null` (e.g. `old-file`
when a new file is added), or a temporary file (e.g. `old-file` in the
index). `GIT_EXTERNAL_DIFF` should not worry about unlinking the
temporary file --- it is removed when `GIT_EXTERNAL_DIFF` exits.
+
For a path that is unmerged, `GIT_EXTERNAL_DIFF` is called with 1
parameter, <path>.
+
For each path `GIT_EXTERNAL_DIFF` is called, two environment variables,
`GIT_DIFF_PATH_COUNTER` and `GIT_DIFF_PATH_TOTAL` are set.
`GIT_DIFF_PATH_COUNTER`::
A 1-based counter incremented by one for every path.
`GIT_DIFF_PATH_TOTAL`::
The total number of paths.
other
~~~~~
`GIT_MERGE_VERBOSITY`::
A number controlling the amount of output shown by
the recursive merge strategy. Overrides merge.verbosity.
See linkgit:git-merge[1]
`GIT_PAGER`::
This environment variable overrides `$PAGER`. If it is set
to an empty string or to the value "cat", Git will not launch
a pager. See also the `core.pager` option in
linkgit:git-config[1].
`GIT_EDITOR`::
This environment variable overrides `$EDITOR` and `$VISUAL`.
It is used by several Git commands when, on interactive mode,
an editor is to be launched. See also linkgit:git-var[1]
and the `core.editor` option in linkgit:git-config[1].
`GIT_SSH`::
`GIT_SSH_COMMAND`::
If either of these environment variables is set then 'git fetch'
and 'git push' will use the specified command instead of 'ssh'
when they need to connect to a remote system.
The command will be given exactly two or four arguments: the
'username@host' (or just 'host') from the URL and the shell
command to execute on that remote system, optionally preceded by
`-p` (literally) and the 'port' from the URL when it specifies
something other than the default SSH port.
+
`$GIT_SSH_COMMAND` takes precedence over `$GIT_SSH`, and is interpreted
by the shell, which allows additional arguments to be included.
`$GIT_SSH` on the other hand must be just the path to a program
(which can be a wrapper shell script, if additional arguments are
needed).
+
Usually it is easier to configure any desired options through your
personal `.ssh/config` file. Please consult your ssh documentation
for further details.
`GIT_ASKPASS`::
If this environment variable is set, then Git commands which need to
acquire passwords or passphrases (e.g. for HTTP or IMAP authentication)
will call this program with a suitable prompt as command-line argument
and read the password from its STDOUT. See also the `core.askPass`
option in linkgit:git-config[1].
`GIT_TERMINAL_PROMPT`::
If this environment variable is set to `0`, git will not prompt
on the terminal (e.g., when asking for HTTP authentication).
`GIT_CONFIG_NOSYSTEM`::
Whether to skip reading settings from the system-wide
`$(prefix)/etc/gitconfig` file. This environment variable can
be used along with `$HOME` and `$XDG_CONFIG_HOME` to create a
predictable environment for a picky script, or you can set it
temporarily to avoid using a buggy `/etc/gitconfig` file while
waiting for someone with sufficient permissions to fix it.
`GIT_FLUSH`::
If this environment variable is set to "1", then commands such
as 'git blame' (in incremental mode), 'git rev-list', 'git log',
'git check-attr' and 'git check-ignore' will
force a flush of the output stream after each record have been
flushed. If this
variable is set to "0", the output of these commands will be done
using completely buffered I/O. If this environment variable is
not set, Git will choose buffered or record-oriented flushing
based on whether stdout appears to be redirected to a file or not.
`GIT_TRACE`::
Enables general trace messages, e.g. alias expansion, built-in
command execution and external command execution.
+
If this variable is set to "1", "2" or "true" (comparison
is case insensitive), trace messages will be printed to
stderr.
+
If the variable is set to an integer value greater than 2
and lower than 10 (strictly) then Git will interpret this
value as an open file descriptor and will try to write the
trace messages into this file descriptor.
+
Alternatively, if the variable is set to an absolute path
(starting with a '/' character), Git will interpret this
as a file path and will try to write the trace messages
into it.
+
Unsetting the variable, or setting it to empty, "0" or
"false" (case insensitive) disables trace messages.
`GIT_TRACE_PACK_ACCESS`::
Enables trace messages for all accesses to any packs. For each
access, the pack file name and an offset in the pack is
recorded. This may be helpful for troubleshooting some
pack-related performance problems.
See `GIT_TRACE` for available trace output options.
`GIT_TRACE_PACKET`::
Enables trace messages for all packets coming in or out of a
given program. This can help with debugging object negotiation
or other protocol issues. Tracing is turned off at a packet
starting with "PACK" (but see `GIT_TRACE_PACKFILE` below).
See `GIT_TRACE` for available trace output options.
`GIT_TRACE_PACKFILE`::
Enables tracing of packfiles sent or received by a
given program. Unlike other trace output, this trace is
verbatim: no headers, and no quoting of binary data. You almost
certainly want to direct into a file (e.g.,
`GIT_TRACE_PACKFILE=/tmp/my.pack`) rather than displaying it on
the terminal or mixing it with other trace output.
+
Note that this is currently only implemented for the client side
of clones and fetches.
`GIT_TRACE_PERFORMANCE`::
git: add performance tracing for git's main() function to debug scripts Use trace_performance to measure and print execution time and command line arguments of the entire main() function. In constrast to the shell's 'time' utility, which measures total time of the parent process, this logs all involved git commands recursively. This is particularly useful to debug performance issues of scripted commands (i.e. which git commands were called with which parameters, and how long did they execute). Due to git's deliberate use of exit(), the implementation uses an atexit routine rather than just adding trace_performance_since() at the end of main(). Usage example: > GIT_TRACE_PERFORMANCE=~/git-trace.log git stash list Creates a log file like this: 23:57:38.638765 trace.c:405 performance: 0.000310107 s: git command: 'git' 'rev-parse' '--git-dir' 23:57:38.644387 trace.c:405 performance: 0.000261759 s: git command: 'git' 'rev-parse' '--show-toplevel' 23:57:38.646207 trace.c:405 performance: 0.000304468 s: git command: 'git' 'config' '--get-colorbool' 'color.interactive' 23:57:38.648491 trace.c:405 performance: 0.000241667 s: git command: 'git' 'config' '--get-color' 'color.interactive.help' 'red bold' 23:57:38.650465 trace.c:405 performance: 0.000243063 s: git command: 'git' 'config' '--get-color' '' 'reset' 23:57:38.654850 trace.c:405 performance: 0.025126313 s: git command: 'git' 'stash' 'list' Signed-off-by: Karsten Blees <blees@dcon.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-07-12 04:07:01 +04:00
Enables performance related trace messages, e.g. total execution
time of each Git command.
See `GIT_TRACE` for available trace output options.
git: add performance tracing for git's main() function to debug scripts Use trace_performance to measure and print execution time and command line arguments of the entire main() function. In constrast to the shell's 'time' utility, which measures total time of the parent process, this logs all involved git commands recursively. This is particularly useful to debug performance issues of scripted commands (i.e. which git commands were called with which parameters, and how long did they execute). Due to git's deliberate use of exit(), the implementation uses an atexit routine rather than just adding trace_performance_since() at the end of main(). Usage example: > GIT_TRACE_PERFORMANCE=~/git-trace.log git stash list Creates a log file like this: 23:57:38.638765 trace.c:405 performance: 0.000310107 s: git command: 'git' 'rev-parse' '--git-dir' 23:57:38.644387 trace.c:405 performance: 0.000261759 s: git command: 'git' 'rev-parse' '--show-toplevel' 23:57:38.646207 trace.c:405 performance: 0.000304468 s: git command: 'git' 'config' '--get-colorbool' 'color.interactive' 23:57:38.648491 trace.c:405 performance: 0.000241667 s: git command: 'git' 'config' '--get-color' 'color.interactive.help' 'red bold' 23:57:38.650465 trace.c:405 performance: 0.000243063 s: git command: 'git' 'config' '--get-color' '' 'reset' 23:57:38.654850 trace.c:405 performance: 0.025126313 s: git command: 'git' 'stash' 'list' Signed-off-by: Karsten Blees <blees@dcon.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-07-12 04:07:01 +04:00
`GIT_TRACE_SETUP`::
Enables trace messages printing the .git, working tree and current
working directory after Git has completed its setup phase.
See `GIT_TRACE` for available trace output options.
`GIT_TRACE_SHALLOW`::
Enables trace messages that can help debugging fetching /
cloning of shallow repositories.
See `GIT_TRACE` for available trace output options.
`GIT_TRACE_CURL`::
Enables a curl full trace dump of all incoming and outgoing data,
including descriptive information, of the git transport protocol.
This is similar to doing curl `--trace-ascii` on the command line.
This option overrides setting the `GIT_CURL_VERBOSE` environment
variable.
See `GIT_TRACE` for available trace output options.
`GIT_LITERAL_PATHSPECS`::
Setting this variable to `1` will cause Git to treat all
add global --literal-pathspecs option Git takes pathspec arguments in many places to limit the scope of an operation. These pathspecs are treated not as literal paths, but as glob patterns that can be fed to fnmatch. When a user is giving a specific pattern, this is a nice feature. However, when programatically providing pathspecs, it can be a nuisance. For example, to find the latest revision which modified "$foo", one can use "git rev-list -- $foo". But if "$foo" contains glob characters (e.g., "f*"), it will erroneously match more entries than desired. The caller needs to quote the characters in $foo, and even then, the results may not be exactly the same as with a literal pathspec. For instance, the depth checks in match_pathspec_depth do not kick in if we match via fnmatch. This patch introduces a global command-line option (i.e., one for "git" itself, not for specific commands) to turn this behavior off. It also has a matching environment variable, which can make it easier if you are a script or porcelain interface that is going to issue many such commands. This option cannot turn off globbing for particular pathspecs. That could eventually be done with a ":(noglob)" magic pathspec prefix. However, that level of granularity is more cumbersome to use for many cases, and doing ":(noglob)" right would mean converting the whole codebase to use "struct pathspec", as the usual "const char **pathspec" cannot represent extra per-item flags. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-12-20 02:37:30 +04:00
pathspecs literally, rather than as glob patterns. For example,
running `GIT_LITERAL_PATHSPECS=1 git log -- '*.c'` will search
for commits that touch the path `*.c`, not any paths that the
glob `*.c` matches. You might want this if you are feeding
literal paths to Git (e.g., paths previously given to you by
add global --literal-pathspecs option Git takes pathspec arguments in many places to limit the scope of an operation. These pathspecs are treated not as literal paths, but as glob patterns that can be fed to fnmatch. When a user is giving a specific pattern, this is a nice feature. However, when programatically providing pathspecs, it can be a nuisance. For example, to find the latest revision which modified "$foo", one can use "git rev-list -- $foo". But if "$foo" contains glob characters (e.g., "f*"), it will erroneously match more entries than desired. The caller needs to quote the characters in $foo, and even then, the results may not be exactly the same as with a literal pathspec. For instance, the depth checks in match_pathspec_depth do not kick in if we match via fnmatch. This patch introduces a global command-line option (i.e., one for "git" itself, not for specific commands) to turn this behavior off. It also has a matching environment variable, which can make it easier if you are a script or porcelain interface that is going to issue many such commands. This option cannot turn off globbing for particular pathspecs. That could eventually be done with a ":(noglob)" magic pathspec prefix. However, that level of granularity is more cumbersome to use for many cases, and doing ":(noglob)" right would mean converting the whole codebase to use "struct pathspec", as the usual "const char **pathspec" cannot represent extra per-item flags. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-12-20 02:37:30 +04:00
`git ls-tree`, `--raw` diff output, etc).
`GIT_GLOB_PATHSPECS`::
Setting this variable to `1` will cause Git to treat all
pathspecs as glob patterns (aka "glob" magic).
`GIT_NOGLOB_PATHSPECS`::
Setting this variable to `1` will cause Git to treat all
pathspecs as literal (aka "literal" magic).
`GIT_ICASE_PATHSPECS`::
Setting this variable to `1` will cause Git to treat all
pathspecs as case-insensitive.
`GIT_REFLOG_ACTION`::
setup_reflog_action: document the rules for using GIT_REFLOG_ACTION The set_reflog_action helper (in git-sh-setup) is designed to be used once at the very top of a program, like this in "git am", for example: set_reflog_action am The helper function sets the given string to GIT_REFLOG_ACTION only when GIT_REFLOG_ACTION is not yet set. Thanks to this, "git am", when run as the top-level program, will use "am" in GIT_REFLOG_ACTION and the reflog entries made by whatever it does will record the updates of refs done by "am". Because of the conditional assignment, when "git am" is run as a subprogram (i.e. an implementation detail) of "git rebase" that already sets GIT_REFLOG_ACTION to its own name, the call in "git am" to the helper function at the beginning will *not* have any effect. So "git rebase" can do this: set_reflog_action rebase ... do its own preparation, like checking out "onto" commit ... decide to do "format-patch" to "am" pipeline git format-patch --stdout >mbox git am mbox and the reflog entries made inside "git am" invocation will say "rebase", not "am". Calls to "git" commands that update refs would use GIT_REFLOG_ACTION to record who did that update. Most such calls in scripted Porcelains do not define custom reflog message and rely on GIT_REFLOG_ACTION to contain its (or its caller's, when it is called as a subprogram) name. If a scripted Porcelain wants to record a custom reflog message for a single invocation of "git" command (e.g. when "git rebase" uses "git checkout" to detach HEAD at the commit a series is to be replayed on), it needs to set GIT_REFLOG_ACTION to the custom message and export it while calling the "git" command, but such an assignment must be restricted to that single "git" invocation and should not be left behind to affect later codepath. Document the rules to avoid future confusion. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-19 21:54:00 +04:00
When a ref is updated, reflog entries are created to keep
track of the reason why the ref was updated (which is
typically the name of the high-level command that updated
the ref), in addition to the old and new values of the ref.
A scripted Porcelain command can use set_reflog_action
helper function in `git-sh-setup` to set its name to this
variable when it is invoked as the top level command by the
end user, to be recorded in the body of the reflog.
`GIT_REF_PARANOIA`::
If set to `1`, include broken or badly named refs when iterating
over lists of refs. In a normal, non-corrupted repository, this
does nothing. However, enabling it may help git to detect and
abort some operations in the presence of broken refs. Git sets
this variable automatically when performing destructive
operations like linkgit:git-prune[1]. You should not need to set
it yourself unless you want to be paranoid about making sure
an operation has touched every ref (e.g., because you are
cloning a repository to make a backup).
`GIT_ALLOW_PROTOCOL`::
transport: add a protocol-whitelist environment variable If we are cloning an untrusted remote repository into a sandbox, we may also want to fetch remote submodules in order to get the complete view as intended by the other side. However, that opens us up to attacks where a malicious user gets us to clone something they would not otherwise have access to (this is not necessarily a problem by itself, but we may then act on the cloned contents in a way that exposes them to the attacker). Ideally such a setup would sandbox git entirely away from high-value items, but this is not always practical or easy to set up (e.g., OS network controls may block multiple protocols, and we would want to enable some but not others). We can help this case by providing a way to restrict particular protocols. We use a whitelist in the environment. This is more annoying to set up than a blacklist, but defaults to safety if the set of protocols git supports grows). If no whitelist is specified, we continue to default to allowing all protocols (this is an "unsafe" default, but since the minority of users will want this sandboxing effect, it is the only sensible one). A note on the tests: ideally these would all be in a single test file, but the git-daemon and httpd test infrastructure is an all-or-nothing proposition rather than a test-by-test prerequisite. By putting them all together, we would be unable to test the file-local code on machines without apache. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-09-16 20:12:52 +03:00
If set, provide a colon-separated list of protocols which are
allowed to be used with fetch/push/clone. This is useful to
restrict recursive submodule initialization from an untrusted
repository. Any protocol not mentioned will be disallowed (i.e.,
this is a whitelist, not a blacklist). If the variable is not
set at all, all protocols are enabled. The protocol names
currently used by git are:
- `file`: any local file-based path (including `file://` URLs,
or local paths)
- `git`: the anonymous git protocol over a direct TCP
connection (or proxy, if configured)
- `ssh`: git over ssh (including `host:path` syntax,
`ssh://`, etc).
transport: add a protocol-whitelist environment variable If we are cloning an untrusted remote repository into a sandbox, we may also want to fetch remote submodules in order to get the complete view as intended by the other side. However, that opens us up to attacks where a malicious user gets us to clone something they would not otherwise have access to (this is not necessarily a problem by itself, but we may then act on the cloned contents in a way that exposes them to the attacker). Ideally such a setup would sandbox git entirely away from high-value items, but this is not always practical or easy to set up (e.g., OS network controls may block multiple protocols, and we would want to enable some but not others). We can help this case by providing a way to restrict particular protocols. We use a whitelist in the environment. This is more annoying to set up than a blacklist, but defaults to safety if the set of protocols git supports grows). If no whitelist is specified, we continue to default to allowing all protocols (this is an "unsafe" default, but since the minority of users will want this sandboxing effect, it is the only sensible one). A note on the tests: ideally these would all be in a single test file, but the git-daemon and httpd test infrastructure is an all-or-nothing proposition rather than a test-by-test prerequisite. By putting them all together, we would be unable to test the file-local code on machines without apache. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-09-16 20:12:52 +03:00
- `http`: git over http, both "smart http" and "dumb http".
Note that this does _not_ include `https`; if you want both,
you should specify both as `http:https`.
- any external helpers are named by their protocol (e.g., use
`hg` to allow the `git-remote-hg` helper)
add global --literal-pathspecs option Git takes pathspec arguments in many places to limit the scope of an operation. These pathspecs are treated not as literal paths, but as glob patterns that can be fed to fnmatch. When a user is giving a specific pattern, this is a nice feature. However, when programatically providing pathspecs, it can be a nuisance. For example, to find the latest revision which modified "$foo", one can use "git rev-list -- $foo". But if "$foo" contains glob characters (e.g., "f*"), it will erroneously match more entries than desired. The caller needs to quote the characters in $foo, and even then, the results may not be exactly the same as with a literal pathspec. For instance, the depth checks in match_pathspec_depth do not kick in if we match via fnmatch. This patch introduces a global command-line option (i.e., one for "git" itself, not for specific commands) to turn this behavior off. It also has a matching environment variable, which can make it easier if you are a script or porcelain interface that is going to issue many such commands. This option cannot turn off globbing for particular pathspecs. That could eventually be done with a ":(noglob)" magic pathspec prefix. However, that level of granularity is more cumbersome to use for many cases, and doing ":(noglob)" right would mean converting the whole codebase to use "struct pathspec", as the usual "const char **pathspec" cannot represent extra per-item flags. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-12-20 02:37:30 +04:00
Discussion[[Discussion]]
------------------------
More detail on the following is available from the
link:user-manual.html#git-concepts[Git concepts chapter of the
user-manual] and linkgit:gitcore-tutorial[7].
A Git project normally consists of a working directory with a ".git"
subdirectory at the top level. The .git directory contains, among other
things, a compressed object database representing the complete history
of the project, an "index" file which links that history to the current
contents of the working tree, and named pointers into that history such
as tags and branch heads.
The object database contains objects of three main types: blobs, which
hold file data; trees, which point to blobs and other trees to build up
directory hierarchies; and commits, which each reference a single tree
and some number of parent commits.
The commit, equivalent to what other systems call a "changeset" or
"version", represents a step in the project's history, and each parent
represents an immediately preceding step. Commits with more than one
parent represent merges of independent lines of development.
All objects are named by the SHA-1 hash of their contents, normally
written as a string of 40 hex digits. Such names are globally unique.
The entire history leading up to a commit can be vouched for by signing
just that commit. A fourth object type, the tag, is provided for this
purpose.
When first created, objects are stored in individual files, but for
efficiency may later be compressed together into "pack files".
Named pointers called refs mark interesting points in history. A ref
may contain the SHA-1 name of an object or the name of another ref. Refs
with names beginning `ref/head/` contain the SHA-1 name of the most
recent commit (or "head") of a branch under development. SHA-1 names of
tags of interest are stored under `ref/tags/`. A special ref named
`HEAD` contains the name of the currently checked-out branch.
The index file is initialized with a list of all paths and, for each
path, a blob object and a set of attributes. The blob object represents
the contents of the file as of the head of the current branch. The
attributes (last modified time, size, etc.) are taken from the
corresponding file in the working tree. Subsequent changes to the
working tree can be found by comparing these attributes. The index may
be updated with new content, and new commits may be created from the
content stored in the index.
The index is also capable of storing multiple entries (called "stages")
for a given pathname. These stages are used to hold the various
unmerged version of a file when a merge is in progress.
FURTHER DOCUMENTATION
---------------------
See the references in the "description" section to get started
using Git. The following is probably more detail than necessary
for a first-time user.
The link:user-manual.html#git-concepts[Git concepts chapter of the
user-manual] and linkgit:gitcore-tutorial[7] both provide
introductions to the underlying Git architecture.
See linkgit:gitworkflows[7] for an overview of recommended workflows.
See also the link:howto-index.html[howto] documents for some useful
examples.
The internals are documented in the
link:technical/api-index.html[Git API documentation].
Users migrating from CVS may also want to
read linkgit:gitcvs-migration[7].
Authors
-------
Git was started by Linus Torvalds, and is currently maintained by Junio
C Hamano. Numerous contributions have come from the Git mailing list
<git@vger.kernel.org>. http://www.openhub.net/p/git/contributors/summary
gives you a more complete list of contributors.
If you have a clone of git.git itself, the
output of linkgit:git-shortlog[1] and linkgit:git-blame[1] can show you
the authors for specific parts of the project.
Reporting Bugs
--------------
Report bugs to the Git mailing list <git@vger.kernel.org> where the
development and maintenance is primarily done. You do not have to be
subscribed to the list to send a message there.
SEE ALSO
--------
linkgit:gittutorial[7], linkgit:gittutorial-2[7],
linkgit:giteveryday[7], linkgit:gitcvs-migration[7],
linkgit:gitglossary[7], linkgit:gitcore-tutorial[7],
linkgit:gitcli[7], link:user-manual.html[The Git User's Manual],
linkgit:gitworkflows[7]
GIT
---
Part of the linkgit:git[1] suite