Documentation/git-clone.txt - jrn/git - Git at Google

 git-clone(1)
 ============

 NAME
 ----
 git-clone - Clone a repository into a new directory


 SYNOPSIS
 --------
 [verse]
 'git clone' [--template=<template_directory>]
 	  [-l] [-s] [--no-hardlinks] [-q] [-n] [--bare] [--mirror]
 	  [-o <name>] [-b <name>] [-u <upload-pack>] [--reference <repository>]
 	  [--dissociate] [--separate-git-dir <git dir>]
 	  [--depth <depth>] [--[no-]single-branch]
 	  [--recurse-submodules] [--[no-]shallow-submodules]
 	  [--jobs <n>] [--] <repository> [<directory>]

 DESCRIPTION
 -----------

 Clones a repository into a newly created directory, creates
 remote-tracking branches for each branch in the cloned repository
 (visible using `git branch -r`), and creates and checks out an
 initial branch that is forked from the cloned repository's
 currently active branch.

 After the clone, a plain `git fetch` without arguments will update
 all the remote-tracking branches, and a `git pull` without
 arguments will in addition merge the remote master branch into the
 current master branch, if any (this is untrue when "--single-branch"
 is given; see below).

 This default configuration is achieved by creating references to
 the remote branch heads under `refs/remotes/origin` and
 by initializing `remote.origin.url` and `remote.origin.fetch`
 configuration variables.


 OPTIONS
 -------
 --local::
 -l::
 	When the repository to clone from is on a local machine,
 	this flag bypasses the normal "Git aware" transport
 	mechanism and clones the repository by making a copy of
 	HEAD and everything under objects and refs directories.
 	The files under `.git/objects/` directory are hardlinked
 	to save space when possible.
 +
 If the repository is specified as a local path (e.g., `/path/to/repo`),
 this is the default, and --local is essentially a no-op.  If the
 repository is specified as a URL, then this flag is ignored (and we
 never use the local optimizations).  Specifying `--no-local` will
 override the default when `/path/to/repo` is given, using the regular
 Git transport instead.

 --no-hardlinks::
 	Force the cloning process from a repository on a local
 	filesystem to copy the files under the `.git/objects`
 	directory instead of using hardlinks. This may be desirable
 	if you are trying to make a back-up of your repository.

 --shared::
 -s::
 	When the repository to clone is on the local machine,
 	instead of using hard links, automatically setup
 	`.git/objects/info/alternates` to share the objects
 	with the source repository.  The resulting repository
 	starts out without any object of its own.
 +
 *NOTE*: this is a possibly dangerous operation; do *not* use
 it unless you understand what it does. If you clone your
 repository using this option and then delete branches (or use any
 other Git command that makes any existing commit unreferenced) in the
 source repository, some objects may become unreferenced (or dangling).
 These objects may be removed by normal Git operations (such as `git commit`)
 which automatically call `git gc --auto`. (See linkgit:git-gc[1].)
 If these objects are removed and were referenced by the cloned repository,
 then the cloned repository will become corrupt.
 +
 Note that running `git repack` without the `-l` option in a repository
 cloned with `-s` will copy objects from the source repository into a pack
 in the cloned repository, removing the disk space savings of `clone -s`.
 It is safe, however, to run `git gc`, which uses the `-l` option by
 default.
 +
 If you want to break the dependency of a repository cloned with `-s` on
 its source repository, you can simply run `git repack -a` to copy all
 objects from the source repository into a pack in the cloned repository.

 --reference[-if-able] <repository>::
 	If the reference repository is on the local machine,
 	automatically setup `.git/objects/info/alternates` to
 	obtain objects from the reference repository.  Using
 	an already existing repository as an alternate will
 	require fewer objects to be copied from the repository
 	being cloned, reducing network and local storage costs.
 	When using the `--reference-if-able`, a non existing
 	directory is skipped with a warning instead of aborting
 	the clone.
 +
 *NOTE*: see the NOTE for the `--shared` option, and also the
 `--dissociate` option.

 --dissociate::
 	Borrow the objects from reference repositories specified
 	with the `--reference` options only to reduce network
 	transfer, and stop borrowing from them after a clone is made
 	by making necessary local copies of borrowed objects.  This
 	option can also be used when cloning locally from a
 	repository that already borrows objects from another
 	repository--the new repository will borrow objects from the
 	same repository, and this option can be used to stop the
 	borrowing.

 --quiet::
 -q::
 	Operate quietly.  Progress is not reported to the standard
 	error stream.

 --verbose::
 -v::
 	Run verbosely. Does not affect the reporting of progress status
 	to the standard error stream.

 --progress::
 	Progress status is reported on the standard error stream
 	by default when it is attached to a terminal, unless -q
 	is specified. This flag forces progress status even if the
 	standard error stream is not directed to a terminal.

 --no-checkout::
 -n::
 	No checkout of HEAD is performed after the clone is complete.

 --bare::
 	Make a 'bare' Git repository.  That is, instead of
 	creating `<directory>` and placing the administrative
 	files in `<directory>/.git`, make the `<directory>`
 	itself the `$GIT_DIR`. This obviously implies the `-n`
 	because there is nowhere to check out the working tree.
 	Also the branch heads at the remote are copied directly
 	to corresponding local branch heads, without mapping
 	them to `refs/remotes/origin/`.  When this option is
 	used, neither remote-tracking branches nor the related
 	configuration variables are created.

 --mirror::
 	Set up a mirror of the source repository.  This implies `--bare`.
 	Compared to `--bare`, `--mirror` not only maps local branches of the
 	source to local branches of the target, it maps all refs (including
 	remote-tracking branches, notes etc.) and sets up a refspec configuration such
 	that all these refs are overwritten by a `git remote update` in the
 	target repository.

 --origin <name>::
 -o <name>::
 	Instead of using the remote name `origin` to keep track
 	of the upstream repository, use `<name>`.

 --branch <name>::
 -b <name>::
 	Instead of pointing the newly created HEAD to the branch pointed
 	to by the cloned repository's HEAD, point to `<name>` branch
 	instead. In a non-bare repository, this is the branch that will
 	be checked out.
 	`--branch` can also take tags and detaches the HEAD at that commit
 	in the resulting repository.

 --upload-pack <upload-pack>::
 -u <upload-pack>::
 	When given, and the repository to clone from is accessed
 	via ssh, this specifies a non-default path for the command
 	run on the other end.

 --template=<template_directory>::
 	Specify the directory from which templates will be used;
 	(See the "TEMPLATE DIRECTORY" section of linkgit:git-init[1].)

 --config <key>=<value>::
 -c <key>=<value>::
 	Set a configuration variable in the newly-created repository;
 	this takes effect immediately after the repository is
 	initialized, but before the remote history is fetched or any
 	files checked out.  The key is in the same format as expected by
 	linkgit:git-config[1] (e.g., `core.eol=true`). If multiple
 	values are given for the same key, each value will be written to
 	the config file. This makes it safe, for example, to add
 	additional fetch refspecs to the origin remote.

 --depth <depth>::
 	Create a 'shallow' clone with a history truncated to the
 	specified number of commits. Implies `--single-branch` unless
 	`--no-single-branch` is given to fetch the histories near the
 	tips of all branches. If you want to clone submodules shallowly,
 	also pass `--shallow-submodules`.

 --shallow-since=<date>::
 	Create a shallow clone with a history after the specified time.

 --shallow-exclude=<revision>::
 	Create a shallow clone with a history, excluding commits
 	reachable from a specified remote branch or tag.  This option
 	can be specified multiple times.

 --[no-]single-branch::
 	Clone only the history leading to the tip of a single branch,
 	either specified by the `--branch` option or the primary
 	branch remote's `HEAD` points at.
 	Further fetches into the resulting repository will only update the
 	remote-tracking branch for the branch this option was used for the
 	initial cloning.  If the HEAD at the remote did not point at any
 	branch when `--single-branch` clone was made, no remote-tracking
 	branch is created.

 --recurse-submodules[=<pathspec]::
 	After the clone is created, initialize and clone submodules
 	within based on the provided pathspec.  If no pathspec is
 	provided, all submodules are initialized and cloned.
 	Submodules are initialized and cloned using their default
 	settings.  The resulting clone has `submodule.active` set to
 	the provided pathspec, or "." (meaning all submodules) if no
 	pathspec is provided.  This is equivalent to running
 	`git submodule update --init --recursive` immediately after
 	the clone is finished. This option is ignored if the cloned
 	repository does not have a worktree/checkout (i.e. if any of
 	`--no-checkout`/`-n`, `--bare`, or `--mirror` is given)

 --[no-]shallow-submodules::
 	All submodules which are cloned will be shallow with a depth of 1.

 --separate-git-dir=<git dir>::
 	Instead of placing the cloned repository where it is supposed
 	to be, place the cloned repository at the specified directory,
 	then make a filesystem-agnostic Git symbolic link to there.
 	The result is Git repository can be separated from working
 	tree.

 -j <n>::
 --jobs <n>::
 	The number of submodules fetched at the same time.
 	Defaults to the `submodule.fetchJobs` option.

 <repository>::
 	The (possibly remote) repository to clone from.  See the
 	<<URLS,URLS>> section below for more information on specifying
 	repositories.

 <directory>::
 	The name of a new directory to clone into.  The "humanish"
 	part of the source repository is used if no directory is
 	explicitly given (`repo` for `/path/to/repo.git` and `foo`
 	for `host.xz:foo/.git`).  Cloning into an existing directory
 	is only allowed if the directory is empty.

 :git-clone: 1
 include::urls.txt[]

 Examples
 --------

 * Clone from upstream:
 +
 ------------
 $ git clone git://git.kernel.org/pub/scm/.../linux.git my-linux
 $ cd my-linux
 $ make
 ------------


 * Make a local clone that borrows from the current directory, without checking things out:
 +
 ------------
 $ git clone -l -s -n . ../copy
 $ cd ../copy
 $ git show-branch
 ------------


 * Clone from upstream while borrowing from an existing local directory:
 +
 ------------
 $ git clone --reference /git/linux.git \
 	git://git.kernel.org/pub/scm/.../linux.git \
 	my-linux
 $ cd my-linux
 ------------


 * Create a bare repository to publish your changes to the public:
 +
 ------------
 $ git clone --bare -l /home/proj/.git /pub/scm/proj.git
 ------------


 GIT
 ---
 Part of the linkgit:git[1] suite
	git-clone(1)
	============

	NAME
	----
	git-clone - Clone a repository into a new directory


	SYNOPSIS
	--------
	[verse]
	'git clone' [--template=<template_directory>]
	[-l] [-s] [--no-hardlinks] [-q] [-n] [--bare] [--mirror]
	[-o <name>] [-b <name>] [-u <upload-pack>] [--reference <repository>]
	[--dissociate] [--separate-git-dir <git dir>]
	[--depth <depth>] [--[no-]single-branch]
	[--recurse-submodules] [--[no-]shallow-submodules]
	[--jobs <n>] [--] <repository> [<directory>]

	DESCRIPTION
	-----------

	Clones a repository into a newly created directory, creates
	remote-tracking branches for each branch in the cloned repository
	(visible using `git branch -r`), and creates and checks out an
	initial branch that is forked from the cloned repository's
	currently active branch.

	After the clone, a plain `git fetch` without arguments will update
	all the remote-tracking branches, and a `git pull` without
	arguments will in addition merge the remote master branch into the
	current master branch, if any (this is untrue when "--single-branch"
	is given; see below).

	This default configuration is achieved by creating references to
	the remote branch heads under `refs/remotes/origin` and
	by initializing `remote.origin.url` and `remote.origin.fetch`
	configuration variables.


	OPTIONS
	-------
	--local::
	-l::
	When the repository to clone from is on a local machine,
	this flag bypasses the normal "Git aware" transport
	mechanism and clones the repository by making a copy of
	HEAD and everything under objects and refs directories.
	The files under `.git/objects/` directory are hardlinked
	to save space when possible.
	+
	If the repository is specified as a local path (e.g., `/path/to/repo`),
	this is the default, and --local is essentially a no-op. If the
	repository is specified as a URL, then this flag is ignored (and we
	never use the local optimizations). Specifying `--no-local` will
	override the default when `/path/to/repo` is given, using the regular
	Git transport instead.

	--no-hardlinks::
	Force the cloning process from a repository on a local
	filesystem to copy the files under the `.git/objects`
	directory instead of using hardlinks. This may be desirable
	if you are trying to make a back-up of your repository.

	--shared::
	-s::
	When the repository to clone is on the local machine,
	instead of using hard links, automatically setup
	`.git/objects/info/alternates` to share the objects
	with the source repository. The resulting repository
	starts out without any object of its own.
	+
	NOTE: this is a possibly dangerous operation; do not use
	it unless you understand what it does. If you clone your
	repository using this option and then delete branches (or use any
	other Git command that makes any existing commit unreferenced) in the
	source repository, some objects may become unreferenced (or dangling).
	These objects may be removed by normal Git operations (such as `git commit`)
	which automatically call `git gc --auto`. (See linkgit:git-gc[1].)
	If these objects are removed and were referenced by the cloned repository,
	then the cloned repository will become corrupt.
	+
	Note that running `git repack` without the `-l` option in a repository
	cloned with `-s` will copy objects from the source repository into a pack
	in the cloned repository, removing the disk space savings of `clone -s`.
	It is safe, however, to run `git gc`, which uses the `-l` option by
	default.
	+
	If you want to break the dependency of a repository cloned with `-s` on
	its source repository, you can simply run `git repack -a` to copy all
	objects from the source repository into a pack in the cloned repository.

	--reference[-if-able] <repository>::
	If the reference repository is on the local machine,
	automatically setup `.git/objects/info/alternates` to
	obtain objects from the reference repository. Using
	an already existing repository as an alternate will
	require fewer objects to be copied from the repository
	being cloned, reducing network and local storage costs.
	When using the `--reference-if-able`, a non existing
	directory is skipped with a warning instead of aborting
	the clone.
	+
	NOTE: see the NOTE for the `--shared` option, and also the
	`--dissociate` option.

	--dissociate::
	Borrow the objects from reference repositories specified
	with the `--reference` options only to reduce network
	transfer, and stop borrowing from them after a clone is made
	by making necessary local copies of borrowed objects. This
	option can also be used when cloning locally from a
	repository that already borrows objects from another
	repository--the new repository will borrow objects from the
	same repository, and this option can be used to stop the
	borrowing.

	--quiet::
	-q::
	Operate quietly. Progress is not reported to the standard
	error stream.

	--verbose::
	-v::
	Run verbosely. Does not affect the reporting of progress status
	to the standard error stream.

	--progress::
	Progress status is reported on the standard error stream
	by default when it is attached to a terminal, unless -q
	is specified. This flag forces progress status even if the
	standard error stream is not directed to a terminal.

	--no-checkout::
	-n::
	No checkout of HEAD is performed after the clone is complete.

	--bare::
	Make a 'bare' Git repository. That is, instead of
	creating `<directory>` and placing the administrative
	files in `<directory>/.git`, make the `<directory>`
	itself the `$GIT_DIR`. This obviously implies the `-n`
	because there is nowhere to check out the working tree.
	Also the branch heads at the remote are copied directly
	to corresponding local branch heads, without mapping
	them to `refs/remotes/origin/`. When this option is
	used, neither remote-tracking branches nor the related
	configuration variables are created.

	--mirror::
	Set up a mirror of the source repository. This implies `--bare`.
	Compared to `--bare`, `--mirror` not only maps local branches of the
	source to local branches of the target, it maps all refs (including
	remote-tracking branches, notes etc.) and sets up a refspec configuration such
	that all these refs are overwritten by a `git remote update` in the
	target repository.

	--origin <name>::
	-o <name>::
	Instead of using the remote name `origin` to keep track
	of the upstream repository, use `<name>`.

	--branch <name>::
	-b <name>::
	Instead of pointing the newly created HEAD to the branch pointed
	to by the cloned repository's HEAD, point to `<name>` branch
	instead. In a non-bare repository, this is the branch that will
	be checked out.
	`--branch` can also take tags and detaches the HEAD at that commit
	in the resulting repository.

	--upload-pack <upload-pack>::
	-u <upload-pack>::
	When given, and the repository to clone from is accessed
	via ssh, this specifies a non-default path for the command
	run on the other end.

	--template=<template_directory>::
	Specify the directory from which templates will be used;
	(See the "TEMPLATE DIRECTORY" section of linkgit:git-init[1].)

	--config <key>=<value>::
	-c <key>=<value>::
	Set a configuration variable in the newly-created repository;
	this takes effect immediately after the repository is
	initialized, but before the remote history is fetched or any
	files checked out. The key is in the same format as expected by
	linkgit:git-config[1] (e.g., `core.eol=true`). If multiple
	values are given for the same key, each value will be written to
	the config file. This makes it safe, for example, to add
	additional fetch refspecs to the origin remote.

	--depth <depth>::
	Create a 'shallow' clone with a history truncated to the
	specified number of commits. Implies `--single-branch` unless
	`--no-single-branch` is given to fetch the histories near the
	tips of all branches. If you want to clone submodules shallowly,
	also pass `--shallow-submodules`.

	--shallow-since=<date>::
	Create a shallow clone with a history after the specified time.

	--shallow-exclude=<revision>::
	Create a shallow clone with a history, excluding commits
	reachable from a specified remote branch or tag. This option
	can be specified multiple times.

	--[no-]single-branch::
	Clone only the history leading to the tip of a single branch,
	either specified by the `--branch` option or the primary
	branch remote's `HEAD` points at.
	Further fetches into the resulting repository will only update the
	remote-tracking branch for the branch this option was used for the
	initial cloning. If the HEAD at the remote did not point at any
	branch when `--single-branch` clone was made, no remote-tracking
	branch is created.

	--recurse-submodules[=<pathspec]::
	After the clone is created, initialize and clone submodules
	within based on the provided pathspec. If no pathspec is
	provided, all submodules are initialized and cloned.
	Submodules are initialized and cloned using their default
	settings. The resulting clone has `submodule.active` set to
	the provided pathspec, or "." (meaning all submodules) if no
	pathspec is provided. This is equivalent to running
	`git submodule update --init --recursive` immediately after
	the clone is finished. This option is ignored if the cloned
	repository does not have a worktree/checkout (i.e. if any of
	`--no-checkout`/`-n`, `--bare`, or `--mirror` is given)

	--[no-]shallow-submodules::
	All submodules which are cloned will be shallow with a depth of 1.

	--separate-git-dir=<git dir>::
	Instead of placing the cloned repository where it is supposed
	to be, place the cloned repository at the specified directory,
	then make a filesystem-agnostic Git symbolic link to there.
	The result is Git repository can be separated from working
	tree.

	-j <n>::
	--jobs <n>::
	The number of submodules fetched at the same time.
	Defaults to the `submodule.fetchJobs` option.

	<repository>::
	The (possibly remote) repository to clone from. See the
	<<URLS,URLS>> section below for more information on specifying
	repositories.

	<directory>::
	The name of a new directory to clone into. The "humanish"
	part of the source repository is used if no directory is
	explicitly given (`repo` for `/path/to/repo.git` and `foo`
	for `host.xz:foo/.git`). Cloning into an existing directory
	is only allowed if the directory is empty.

	:git-clone: 1
	include::urls.txt[]

	Examples
	--------

	* Clone from upstream:
	+
	------------
	$ git clone git://git.kernel.org/pub/scm/.../linux.git my-linux
	$ cd my-linux
	$ make
	------------


	* Make a local clone that borrows from the current directory, without checking things out:
	+
	------------
	$ git clone -l -s -n . ../copy
	$ cd ../copy
	$ git show-branch
	------------


	* Clone from upstream while borrowing from an existing local directory:
	+
	------------
	$ git clone --reference /git/linux.git \
	git://git.kernel.org/pub/scm/.../linux.git \
	my-linux
	$ cd my-linux
	------------


	* Create a bare repository to publish your changes to the public:
	+
	------------
	$ git clone --bare -l /home/proj/.git /pub/scm/proj.git
	------------


	GIT
	---
	Part of the linkgit:git[1] suite