Documentation / git-clone.txton commit documentation: add tutorial for first contribution (76644e3)
   1git-clone(1)
   2============
   3
   4NAME
   5----
   6git-clone - Clone a repository into a new directory
   7
   8
   9SYNOPSIS
  10--------
  11[verse]
  12'git clone' [--template=<template_directory>]
  13          [-l] [-s] [--no-hardlinks] [-q] [-n] [--bare] [--mirror]
  14          [-o <name>] [-b <name>] [-u <upload-pack>] [--reference <repository>]
  15          [--dissociate] [--separate-git-dir <git dir>]
  16          [--depth <depth>] [--[no-]single-branch] [--no-tags]
  17          [--recurse-submodules[=<pathspec>]] [--[no-]shallow-submodules]
  18          [--jobs <n>] [--] <repository> [<directory>]
  19
  20DESCRIPTION
  21-----------
  22
  23Clones a repository into a newly created directory, creates
  24remote-tracking branches for each branch in the cloned repository
  25(visible using `git branch -r`), and creates and checks out an
  26initial branch that is forked from the cloned repository's
  27currently active branch.
  28
  29After the clone, a plain `git fetch` without arguments will update
  30all the remote-tracking branches, and a `git pull` without
  31arguments will in addition merge the remote master branch into the
  32current master branch, if any (this is untrue when "--single-branch"
  33is given; see below).
  34
  35This default configuration is achieved by creating references to
  36the remote branch heads under `refs/remotes/origin` and
  37by initializing `remote.origin.url` and `remote.origin.fetch`
  38configuration variables.
  39
  40
  41OPTIONS
  42-------
  43--local::
  44-l::
  45        When the repository to clone from is on a local machine,
  46        this flag bypasses the normal "Git aware" transport
  47        mechanism and clones the repository by making a copy of
  48        HEAD and everything under objects and refs directories.
  49        The files under `.git/objects/` directory are hardlinked
  50        to save space when possible.
  51+
  52If the repository is specified as a local path (e.g., `/path/to/repo`),
  53this is the default, and --local is essentially a no-op.  If the
  54repository is specified as a URL, then this flag is ignored (and we
  55never use the local optimizations).  Specifying `--no-local` will
  56override the default when `/path/to/repo` is given, using the regular
  57Git transport instead.
  58
  59--no-hardlinks::
  60        Force the cloning process from a repository on a local
  61        filesystem to copy the files under the `.git/objects`
  62        directory instead of using hardlinks. This may be desirable
  63        if you are trying to make a back-up of your repository.
  64
  65--shared::
  66-s::
  67        When the repository to clone is on the local machine,
  68        instead of using hard links, automatically setup
  69        `.git/objects/info/alternates` to share the objects
  70        with the source repository.  The resulting repository
  71        starts out without any object of its own.
  72+
  73*NOTE*: this is a possibly dangerous operation; do *not* use
  74it unless you understand what it does. If you clone your
  75repository using this option and then delete branches (or use any
  76other Git command that makes any existing commit unreferenced) in the
  77source repository, some objects may become unreferenced (or dangling).
  78These objects may be removed by normal Git operations (such as `git commit`)
  79which automatically call `git gc --auto`. (See linkgit:git-gc[1].)
  80If these objects are removed and were referenced by the cloned repository,
  81then the cloned repository will become corrupt.
  82+
  83Note that running `git repack` without the `-l` option in a repository
  84cloned with `-s` will copy objects from the source repository into a pack
  85in the cloned repository, removing the disk space savings of `clone -s`.
  86It is safe, however, to run `git gc`, which uses the `-l` option by
  87default.
  88+
  89If you want to break the dependency of a repository cloned with `-s` on
  90its source repository, you can simply run `git repack -a` to copy all
  91objects from the source repository into a pack in the cloned repository.
  92
  93--reference[-if-able] <repository>::
  94        If the reference repository is on the local machine,
  95        automatically setup `.git/objects/info/alternates` to
  96        obtain objects from the reference repository.  Using
  97        an already existing repository as an alternate will
  98        require fewer objects to be copied from the repository
  99        being cloned, reducing network and local storage costs.
 100        When using the `--reference-if-able`, a non existing
 101        directory is skipped with a warning instead of aborting
 102        the clone.
 103+
 104*NOTE*: see the NOTE for the `--shared` option, and also the
 105`--dissociate` option.
 106
 107--dissociate::
 108        Borrow the objects from reference repositories specified
 109        with the `--reference` options only to reduce network
 110        transfer, and stop borrowing from them after a clone is made
 111        by making necessary local copies of borrowed objects.  This
 112        option can also be used when cloning locally from a
 113        repository that already borrows objects from another
 114        repository--the new repository will borrow objects from the
 115        same repository, and this option can be used to stop the
 116        borrowing.
 117
 118--quiet::
 119-q::
 120        Operate quietly.  Progress is not reported to the standard
 121        error stream.
 122
 123--verbose::
 124-v::
 125        Run verbosely. Does not affect the reporting of progress status
 126        to the standard error stream.
 127
 128--progress::
 129        Progress status is reported on the standard error stream
 130        by default when it is attached to a terminal, unless -q
 131        is specified. This flag forces progress status even if the
 132        standard error stream is not directed to a terminal.
 133
 134--no-checkout::
 135-n::
 136        No checkout of HEAD is performed after the clone is complete.
 137
 138--bare::
 139        Make a 'bare' Git repository.  That is, instead of
 140        creating `<directory>` and placing the administrative
 141        files in `<directory>/.git`, make the `<directory>`
 142        itself the `$GIT_DIR`. This obviously implies the `-n`
 143        because there is nowhere to check out the working tree.
 144        Also the branch heads at the remote are copied directly
 145        to corresponding local branch heads, without mapping
 146        them to `refs/remotes/origin/`.  When this option is
 147        used, neither remote-tracking branches nor the related
 148        configuration variables are created.
 149
 150--mirror::
 151        Set up a mirror of the source repository.  This implies `--bare`.
 152        Compared to `--bare`, `--mirror` not only maps local branches of the
 153        source to local branches of the target, it maps all refs (including
 154        remote-tracking branches, notes etc.) and sets up a refspec configuration such
 155        that all these refs are overwritten by a `git remote update` in the
 156        target repository.
 157
 158--origin <name>::
 159-o <name>::
 160        Instead of using the remote name `origin` to keep track
 161        of the upstream repository, use `<name>`.
 162
 163--branch <name>::
 164-b <name>::
 165        Instead of pointing the newly created HEAD to the branch pointed
 166        to by the cloned repository's HEAD, point to `<name>` branch
 167        instead. In a non-bare repository, this is the branch that will
 168        be checked out.
 169        `--branch` can also take tags and detaches the HEAD at that commit
 170        in the resulting repository.
 171
 172--upload-pack <upload-pack>::
 173-u <upload-pack>::
 174        When given, and the repository to clone from is accessed
 175        via ssh, this specifies a non-default path for the command
 176        run on the other end.
 177
 178--template=<template_directory>::
 179        Specify the directory from which templates will be used;
 180        (See the "TEMPLATE DIRECTORY" section of linkgit:git-init[1].)
 181
 182--config <key>=<value>::
 183-c <key>=<value>::
 184        Set a configuration variable in the newly-created repository;
 185        this takes effect immediately after the repository is
 186        initialized, but before the remote history is fetched or any
 187        files checked out.  The key is in the same format as expected by
 188        linkgit:git-config[1] (e.g., `core.eol=true`). If multiple
 189        values are given for the same key, each value will be written to
 190        the config file. This makes it safe, for example, to add
 191        additional fetch refspecs to the origin remote.
 192+
 193Due to limitations of the current implementation, some configuration
 194variables do not take effect until after the initial fetch and checkout.
 195Configuration variables known to not take effect are:
 196`remote.<name>.mirror` and `remote.<name>.tagOpt`.  Use the
 197corresponding `--mirror` and `--no-tags` options instead.
 198
 199--depth <depth>::
 200        Create a 'shallow' clone with a history truncated to the
 201        specified number of commits. Implies `--single-branch` unless
 202        `--no-single-branch` is given to fetch the histories near the
 203        tips of all branches. If you want to clone submodules shallowly,
 204        also pass `--shallow-submodules`.
 205
 206--shallow-since=<date>::
 207        Create a shallow clone with a history after the specified time.
 208
 209--shallow-exclude=<revision>::
 210        Create a shallow clone with a history, excluding commits
 211        reachable from a specified remote branch or tag.  This option
 212        can be specified multiple times.
 213
 214--[no-]single-branch::
 215        Clone only the history leading to the tip of a single branch,
 216        either specified by the `--branch` option or the primary
 217        branch remote's `HEAD` points at.
 218        Further fetches into the resulting repository will only update the
 219        remote-tracking branch for the branch this option was used for the
 220        initial cloning.  If the HEAD at the remote did not point at any
 221        branch when `--single-branch` clone was made, no remote-tracking
 222        branch is created.
 223
 224--no-tags::
 225        Don't clone any tags, and set
 226        `remote.<remote>.tagOpt=--no-tags` in the config, ensuring
 227        that future `git pull` and `git fetch` operations won't follow
 228        any tags. Subsequent explicit tag fetches will still work,
 229        (see linkgit:git-fetch[1]).
 230+
 231Can be used in conjunction with `--single-branch` to clone and
 232maintain a branch with no references other than a single cloned
 233branch. This is useful e.g. to maintain minimal clones of the default
 234branch of some repository for search indexing.
 235
 236--recurse-submodules[=<pathspec]::
 237        After the clone is created, initialize and clone submodules
 238        within based on the provided pathspec.  If no pathspec is
 239        provided, all submodules are initialized and cloned.
 240        This option can be given multiple times for pathspecs consisting
 241        of multiple entries.  The resulting clone has `submodule.active` set to
 242        the provided pathspec, or "." (meaning all submodules) if no
 243        pathspec is provided.
 244+
 245Submodules are initialized and cloned using their default settings. This is
 246equivalent to running
 247`git submodule update --init --recursive <pathspec>` immediately after
 248the clone is finished. This option is ignored if the cloned repository does
 249not have a worktree/checkout (i.e. if any of `--no-checkout`/`-n`, `--bare`,
 250or `--mirror` is given)
 251
 252--[no-]shallow-submodules::
 253        All submodules which are cloned will be shallow with a depth of 1.
 254
 255--separate-git-dir=<git dir>::
 256        Instead of placing the cloned repository where it is supposed
 257        to be, place the cloned repository at the specified directory,
 258        then make a filesystem-agnostic Git symbolic link to there.
 259        The result is Git repository can be separated from working
 260        tree.
 261
 262-j <n>::
 263--jobs <n>::
 264        The number of submodules fetched at the same time.
 265        Defaults to the `submodule.fetchJobs` option.
 266
 267<repository>::
 268        The (possibly remote) repository to clone from.  See the
 269        <<URLS,GIT URLS>> section below for more information on specifying
 270        repositories.
 271
 272<directory>::
 273        The name of a new directory to clone into.  The "humanish"
 274        part of the source repository is used if no directory is
 275        explicitly given (`repo` for `/path/to/repo.git` and `foo`
 276        for `host.xz:foo/.git`).  Cloning into an existing directory
 277        is only allowed if the directory is empty.
 278
 279:git-clone: 1
 280include::urls.txt[]
 281
 282EXAMPLES
 283--------
 284
 285* Clone from upstream:
 286+
 287------------
 288$ git clone git://git.kernel.org/pub/scm/.../linux.git my-linux
 289$ cd my-linux
 290$ make
 291------------
 292
 293
 294* Make a local clone that borrows from the current directory, without checking things out:
 295+
 296------------
 297$ git clone -l -s -n . ../copy
 298$ cd ../copy
 299$ git show-branch
 300------------
 301
 302
 303* Clone from upstream while borrowing from an existing local directory:
 304+
 305------------
 306$ git clone --reference /git/linux.git \
 307        git://git.kernel.org/pub/scm/.../linux.git \
 308        my-linux
 309$ cd my-linux
 310------------
 311
 312
 313* Create a bare repository to publish your changes to the public:
 314+
 315------------
 316$ git clone --bare -l /home/proj/.git /pub/scm/proj.git
 317------------
 318
 319
 320GIT
 321---
 322Part of the linkgit:git[1] suite