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| </head> | |
| <body> | |
| <div id="header"> | |
| <h1> | |
| git-push(1) Manual Page | |
| </h1> | |
| <h2>NAME</h2> | |
| <div class="sectionbody"> | |
| <p>git-push - | |
| Update remote refs along with associated objects | |
| </p> | |
| </div> | |
| </div> | |
| <h2 id="_synopsis">SYNOPSIS</h2> | |
| <div class="sectionbody"> | |
| <div class="verseblock"> | |
| <div class="verseblock-content"><em>git push</em> [--all | --mirror | --tags] [-n | --dry-run] [--receive-pack=<git-receive-pack>] | |
| [--repo=<repository>] [-f | --force] [-v | --verbose] [-u | --set-upstream] | |
| [<repository> [<refspec>…]]</div> | |
| <div class="verseblock-attribution"> | |
| </div></div> | |
| </div> | |
| <h2 id="_description">DESCRIPTION</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>Updates remote refs using local refs, while sending objects | |
| necessary to complete the given refs.</p></div> | |
| <div class="paragraph"><p>You can make interesting things happen to a repository | |
| every time you push into it, by setting up <em>hooks</em> there. See | |
| documentation for <a href="git-receive-pack.html">git-receive-pack(1)</a>.</p></div> | |
| </div> | |
| <h2 id="_options_a_id_options_a">OPTIONS<a id="OPTIONS"></a></h2> | |
| <div class="sectionbody"> | |
| <div class="dlist"><dl> | |
| <dt class="hdlist1"> | |
| <repository> | |
| </dt> | |
| <dd> | |
| <p> | |
| The "remote" repository that is destination of a push | |
| operation. This parameter can be either a URL | |
| (see the section <a href="#URLS">GIT URLS</a> below) or the name | |
| of a remote (see the section <a href="#REMOTES">REMOTES</a> below). | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| <refspec>… | |
| </dt> | |
| <dd> | |
| <p> | |
| The format of a <refspec> parameter is an optional plus | |
| <tt>+</tt>, followed by the source ref <src>, followed | |
| by a colon <tt>:</tt>, followed by the destination ref <dst>. | |
| It is used to specify with what <src> object the <dst> ref | |
| in the remote repository is to be updated. | |
| </p> | |
| <div class="paragraph"><p>The <src> is often the name of the branch you would want to push, but | |
| it can be any arbitrary "SHA-1 expression", such as <tt>master~4</tt> or | |
| <tt>HEAD</tt> (see <a href="gitrevisions.html">gitrevisions(7)</a>).</p></div> | |
| <div class="paragraph"><p>The <dst> tells which ref on the remote side is updated with this | |
| push. Arbitrary expressions cannot be used here, an actual ref must | |
| be named. If <tt>:</tt><dst> is omitted, the same ref as <src> will be | |
| updated.</p></div> | |
| <div class="paragraph"><p>The object referenced by <src> is used to update the <dst> reference | |
| on the remote side, but by default this is only allowed if the | |
| update can fast-forward <dst>. By having the optional leading <tt>+</tt>, | |
| you can tell git to update the <dst> ref even when the update is not a | |
| fast-forward. This does <strong>not</strong> attempt to merge <src> into <dst>. See | |
| EXAMPLES below for details.</p></div> | |
| <div class="paragraph"><p><tt>tag <tag></tt> means the same as <tt>refs/tags/<tag>:refs/tags/<tag></tt>.</p></div> | |
| <div class="paragraph"><p>Pushing an empty <src> allows you to delete the <dst> ref from | |
| the remote repository.</p></div> | |
| <div class="paragraph"><p>The special refspec <tt>:</tt> (or <tt>+:</tt> to allow non-fast-forward updates) | |
| directs git to push "matching" branches: for every branch that exists on | |
| the local side, the remote side is updated if a branch of the same name | |
| already exists on the remote side. This is the default operation mode | |
| if no explicit refspec is found (that is neither on the command line | |
| nor in any Push line of the corresponding remotes file---see below).</p></div> | |
| </dd> | |
| <dt class="hdlist1"> | |
| --all | |
| </dt> | |
| <dd> | |
| <p> | |
| Instead of naming each ref to push, specifies that all | |
| refs under <tt>refs/heads/</tt> be pushed. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| --mirror | |
| </dt> | |
| <dd> | |
| <p> | |
| Instead of naming each ref to push, specifies that all | |
| refs under <tt>refs/</tt> (which includes but is not | |
| limited to <tt>refs/heads/</tt>, <tt>refs/remotes/</tt>, and <tt>refs/tags/</tt>) | |
| be mirrored to the remote repository. Newly created local | |
| refs will be pushed to the remote end, locally updated refs | |
| will be force updated on the remote end, and deleted refs | |
| will be removed from the remote end. This is the default | |
| if the configuration option <tt>remote.<remote>.mirror</tt> is | |
| set. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| -n | |
| </dt> | |
| <dt class="hdlist1"> | |
| --dry-run | |
| </dt> | |
| <dd> | |
| <p> | |
| Do everything except actually send the updates. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| --porcelain | |
| </dt> | |
| <dd> | |
| <p> | |
| Produce machine-readable output. The output status line for each ref | |
| will be tab-separated and sent to stdout instead of stderr. The full | |
| symbolic names of the refs will be given. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| --delete | |
| </dt> | |
| <dd> | |
| <p> | |
| All listed refs are deleted from the remote repository. This is | |
| the same as prefixing all refs with a colon. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| --tags | |
| </dt> | |
| <dd> | |
| <p> | |
| All refs under <tt>refs/tags</tt> are pushed, in | |
| addition to refspecs explicitly listed on the command | |
| line. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| --receive-pack=<git-receive-pack> | |
| </dt> | |
| <dt class="hdlist1"> | |
| --exec=<git-receive-pack> | |
| </dt> | |
| <dd> | |
| <p> | |
| Path to the <em>git-receive-pack</em> program on the remote | |
| end. Sometimes useful when pushing to a remote | |
| repository over ssh, and you do not have the program in | |
| a directory on the default $PATH. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| -f | |
| </dt> | |
| <dt class="hdlist1"> | |
| --force | |
| </dt> | |
| <dd> | |
| <p> | |
| Usually, the command refuses to update a remote ref that is | |
| not an ancestor of the local ref used to overwrite it. | |
| This flag disables the check. This can cause the | |
| remote repository to lose commits; use it with care. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| --repo=<repository> | |
| </dt> | |
| <dd> | |
| <p> | |
| This option is only relevant if no <repository> argument is | |
| passed in the invocation. In this case, <em>git push</em> derives the | |
| remote name from the current branch: If it tracks a remote | |
| branch, then that remote repository is pushed to. Otherwise, | |
| the name "origin" is used. For this latter case, this option | |
| can be used to override the name "origin". In other words, | |
| the difference between these two commands | |
| </p> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><tt>git push public #1 | |
| git push --repo=public #2</tt></pre> | |
| </div></div> | |
| <div class="paragraph"><p>is that #1 always pushes to "public" whereas #2 pushes to "public" | |
| only if the current branch does not track a remote branch. This is | |
| useful if you write an alias or script around <em>git push</em>.</p></div> | |
| </dd> | |
| <dt class="hdlist1"> | |
| -u | |
| </dt> | |
| <dt class="hdlist1"> | |
| --set-upstream | |
| </dt> | |
| <dd> | |
| <p> | |
| For every branch that is up to date or successfully pushed, add | |
| upstream (tracking) reference, used by argument-less | |
| <a href="git-pull.html">git-pull(1)</a> and other commands. For more information, | |
| see <em>branch.<name>.merge</em> in <a href="git-config.html">git-config(1)</a>. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| --thin | |
| </dt> | |
| <dt class="hdlist1"> | |
| --no-thin | |
| </dt> | |
| <dd> | |
| <p> | |
| These options are passed to <a href="git-send-pack.html">git-send-pack(1)</a>. A thin transfer | |
| significantly reduces the amount of sent data when the sender and | |
| receiver share many of the same objects in common. The default is | |
| --thin. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| -q | |
| </dt> | |
| <dt class="hdlist1"> | |
| --quiet | |
| </dt> | |
| <dd> | |
| <p> | |
| Suppress all output, including the listing of updated refs, | |
| unless an error occurs. Progress is not reported to the standard | |
| error stream. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| -v | |
| </dt> | |
| <dt class="hdlist1"> | |
| --verbose | |
| </dt> | |
| <dd> | |
| <p> | |
| Run verbosely. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| --progress | |
| </dt> | |
| <dd> | |
| <p> | |
| 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. | |
| </p> | |
| </dd> | |
| </dl></div> | |
| </div> | |
| <h2 id="_git_urls_a_id_urls_a">GIT URLS<a id="URLS"></a></h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>In general, URLs contain information about the transport protocol, the | |
| address of the remote server, and the path to the repository. | |
| Depending on the transport protocol, some of this information may be | |
| absent.</p></div> | |
| <div class="paragraph"><p>Git natively supports ssh, git, http, https, ftp, ftps, and rsync | |
| protocols. The following syntaxes may be used with them:</p></div> | |
| <div class="ulist"><ul> | |
| <li> | |
| <p> | |
| ssh://[user@]host.xz[:port]/path/to/repo.git/ | |
| </p> | |
| </li> | |
| <li> | |
| <p> | |
| git://host.xz[:port]/path/to/repo.git/ | |
| </p> | |
| </li> | |
| <li> | |
| <p> | |
| http[s]://host.xz[:port]/path/to/repo.git/ | |
| </p> | |
| </li> | |
| <li> | |
| <p> | |
| ftp[s]://host.xz[:port]/path/to/repo.git/ | |
| </p> | |
| </li> | |
| <li> | |
| <p> | |
| rsync://host.xz/path/to/repo.git/ | |
| </p> | |
| </li> | |
| </ul></div> | |
| <div class="paragraph"><p>An alternative scp-like syntax may also be used with the ssh protocol:</p></div> | |
| <div class="ulist"><ul> | |
| <li> | |
| <p> | |
| [user@]host.xz:path/to/repo.git/ | |
| </p> | |
| </li> | |
| </ul></div> | |
| <div class="paragraph"><p>The ssh and git protocols additionally support ~username expansion:</p></div> | |
| <div class="ulist"><ul> | |
| <li> | |
| <p> | |
| ssh://[user@]host.xz[:port]/~[user]/path/to/repo.git/ | |
| </p> | |
| </li> | |
| <li> | |
| <p> | |
| git://host.xz[:port]/~[user]/path/to/repo.git/ | |
| </p> | |
| </li> | |
| <li> | |
| <p> | |
| [user@]host.xz:/~[user]/path/to/repo.git/ | |
| </p> | |
| </li> | |
| </ul></div> | |
| <div class="paragraph"><p>For local repositories, also supported by git natively, the following | |
| syntaxes may be used:</p></div> | |
| <div class="ulist"><ul> | |
| <li> | |
| <p> | |
| /path/to/repo.git/ | |
| </p> | |
| </li> | |
| <li> | |
| <p> | |
| <a href="file:///path/to/repo.git/">file:///path/to/repo.git/</a> | |
| </p> | |
| </li> | |
| </ul></div> | |
| <div class="paragraph"><p>These two syntaxes are mostly equivalent, except when cloning, when | |
| the former implies --local option. See <a href="git-clone.html">git-clone(1)</a> for | |
| details.</p></div> | |
| <div class="paragraph"><p>When git doesn’t know how to handle a certain transport protocol, it | |
| attempts to use the <em>remote-<transport></em> remote helper, if one | |
| exists. To explicitly request a remote helper, the following syntax | |
| may be used:</p></div> | |
| <div class="ulist"><ul> | |
| <li> | |
| <p> | |
| <transport>::<address> | |
| </p> | |
| </li> | |
| </ul></div> | |
| <div class="paragraph"><p>where <address> may be a path, a server and path, or an arbitrary | |
| URL-like string recognized by the specific remote helper being | |
| invoked. See <a href="git-remote-helpers.html">git-remote-helpers(1)</a> for details.</p></div> | |
| <div class="paragraph"><p>If there are a large number of similarly-named remote repositories and | |
| you want to use a different format for them (such that the URLs you | |
| use will be rewritten into URLs that work), you can create a | |
| configuration section of the form:</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><tt> [url "<actual url base>"] | |
| insteadOf = <other url base></tt></pre> | |
| </div></div> | |
| <div class="paragraph"><p>For example, with this:</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><tt> [url "git://git.host.xz/"] | |
| insteadOf = host.xz:/path/to/ | |
| insteadOf = work:</tt></pre> | |
| </div></div> | |
| <div class="paragraph"><p>a URL like "work:repo.git" or like "host.xz:/path/to/repo.git" will be | |
| rewritten in any context that takes a URL to be "git://git.host.xz/repo.git".</p></div> | |
| <div class="paragraph"><p>If you want to rewrite URLs for push only, you can create a | |
| configuration section of the form:</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><tt> [url "<actual url base>"] | |
| pushInsteadOf = <other url base></tt></pre> | |
| </div></div> | |
| <div class="paragraph"><p>For example, with this:</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><tt> [url "ssh://example.org/"] | |
| pushInsteadOf = git://example.org/</tt></pre> | |
| </div></div> | |
| <div class="paragraph"><p>a URL like "git://example.org/path/to/repo.git" will be rewritten to | |
| "ssh://example.org/path/to/repo.git" for pushes, but pulls will still | |
| use the original URL.</p></div> | |
| </div> | |
| <h2 id="_remotes_a_id_remotes_a">REMOTES<a id="REMOTES"></a></h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>The name of one of the following can be used instead | |
| of a URL as <tt><repository></tt> argument:</p></div> | |
| <div class="ulist"><ul> | |
| <li> | |
| <p> | |
| a remote in the git configuration file: <tt>$GIT_DIR/config</tt>, | |
| </p> | |
| </li> | |
| <li> | |
| <p> | |
| a file in the <tt>$GIT_DIR/remotes</tt> directory, or | |
| </p> | |
| </li> | |
| <li> | |
| <p> | |
| a file in the <tt>$GIT_DIR/branches</tt> directory. | |
| </p> | |
| </li> | |
| </ul></div> | |
| <div class="paragraph"><p>All of these also allow you to omit the refspec from the command line | |
| because they each contain a refspec which git will use by default.</p></div> | |
| <h3 id="_named_remote_in_configuration_file">Named remote in configuration file</h3><div style="clear:left"></div> | |
| <div class="paragraph"><p>You can choose to provide the name of a remote which you had previously | |
| configured using <a href="git-remote.html">git-remote(1)</a>, <a href="git-config.html">git-config(1)</a> | |
| or even by a manual edit to the <tt>$GIT_DIR/config</tt> file. The URL of | |
| this remote will be used to access the repository. The refspec | |
| of this remote will be used by default when you do | |
| not provide a refspec on the command line. The entry in the | |
| config file would appear like this:</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><tt> [remote "<name>"] | |
| url = <url> | |
| pushurl = <pushurl> | |
| push = <refspec> | |
| fetch = <refspec></tt></pre> | |
| </div></div> | |
| <div class="paragraph"><p>The <tt><pushurl></tt> is used for pushes only. It is optional and defaults | |
| to <tt><url></tt>.</p></div> | |
| <h3 id="_named_file_in_tt_git_dir_remotes_tt">Named file in <tt>$GIT_DIR/remotes</tt></h3><div style="clear:left"></div> | |
| <div class="paragraph"><p>You can choose to provide the name of a | |
| file in <tt>$GIT_DIR/remotes</tt>. The URL | |
| in this file will be used to access the repository. The refspec | |
| in this file will be used as default when you do not | |
| provide a refspec on the command line. This file should have the | |
| following format:</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><tt> URL: one of the above URL format | |
| Push: <refspec> | |
| Pull: <refspec></tt></pre> | |
| </div></div> | |
| <div class="paragraph"><p><tt>Push:</tt> lines are used by <em>git push</em> and | |
| <tt>Pull:</tt> lines are used by <em>git pull</em> and <em>git fetch</em>. | |
| Multiple <tt>Push:</tt> and <tt>Pull:</tt> lines may | |
| be specified for additional branch mappings.</p></div> | |
| <h3 id="_named_file_in_tt_git_dir_branches_tt">Named file in <tt>$GIT_DIR/branches</tt></h3><div style="clear:left"></div> | |
| <div class="paragraph"><p>You can choose to provide the name of a | |
| file in <tt>$GIT_DIR/branches</tt>. | |
| The URL in this file will be used to access the repository. | |
| This file should have the following format:</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><tt> <url>#<head></tt></pre> | |
| </div></div> | |
| <div class="paragraph"><p><tt><url></tt> is required; <tt>#<head></tt> is optional.</p></div> | |
| <div class="paragraph"><p>Depending on the operation, git will use one of the following | |
| refspecs, if you don’t provide one on the command line. | |
| <tt><branch></tt> is the name of this file in <tt>$GIT_DIR/branches</tt> and | |
| <tt><head></tt> defaults to <tt>master</tt>.</p></div> | |
| <div class="paragraph"><p>git fetch uses:</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><tt> refs/heads/<head>:refs/heads/<branch></tt></pre> | |
| </div></div> | |
| <div class="paragraph"><p>git push uses:</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><tt> HEAD:refs/heads/<head></tt></pre> | |
| </div></div> | |
| </div> | |
| <h2 id="_output">OUTPUT</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>The output of "git push" depends on the transport method used; this | |
| section describes the output when pushing over the git protocol (either | |
| locally or via ssh).</p></div> | |
| <div class="paragraph"><p>The status of the push is output in tabular form, with each line | |
| representing the status of a single ref. Each line is of the form:</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><tt> <flag> <summary> <from> -> <to> (<reason>)</tt></pre> | |
| </div></div> | |
| <div class="paragraph"><p>If --porcelain is used, then each line of the output is of the form:</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><tt> <flag> \t <from>:<to> \t <summary> (<reason>)</tt></pre> | |
| </div></div> | |
| <div class="paragraph"><p>The status of up-to-date refs is shown only if --porcelain or --verbose | |
| option is used.</p></div> | |
| <div class="dlist"><dl> | |
| <dt class="hdlist1"> | |
| flag | |
| </dt> | |
| <dd> | |
| <p> | |
| A single character indicating the status of the ref: | |
| </p> | |
| <div class="dlist"><dl> | |
| <dt class="hdlist1"> | |
| (space) | |
| </dt> | |
| <dd> | |
| <p> | |
| for a successfully pushed fast-forward; | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| <tt>+</tt> | |
| </dt> | |
| <dd> | |
| <p> | |
| for a successful forced update; | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| <tt>-</tt> | |
| </dt> | |
| <dd> | |
| <p> | |
| for a successfully deleted ref; | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| <tt>*</tt> | |
| </dt> | |
| <dd> | |
| <p> | |
| for a successfully pushed new ref; | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| <tt>!</tt> | |
| </dt> | |
| <dd> | |
| <p> | |
| for a ref that was rejected or failed to push; and | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| <tt>=</tt> | |
| </dt> | |
| <dd> | |
| <p> | |
| for a ref that was up to date and did not need pushing. | |
| </p> | |
| </dd> | |
| </dl></div> | |
| </dd> | |
| <dt class="hdlist1"> | |
| summary | |
| </dt> | |
| <dd> | |
| <p> | |
| For a successfully pushed ref, the summary shows the old and new | |
| values of the ref in a form suitable for using as an argument to | |
| <tt>git log</tt> (this is <tt><old>..<new></tt> in most cases, and | |
| <tt><old>...<new></tt> for forced non-fast-forward updates). | |
| </p> | |
| <div class="paragraph"><p>For a failed update, more details are given:</p></div> | |
| <div class="dlist"><dl> | |
| <dt class="hdlist1"> | |
| rejected | |
| </dt> | |
| <dd> | |
| <p> | |
| Git did not try to send the ref at all, typically because it | |
| is not a fast-forward and you did not force the update. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| remote rejected | |
| </dt> | |
| <dd> | |
| <p> | |
| The remote end refused the update. Usually caused by a hook | |
| on the remote side, or because the remote repository has one | |
| of the following safety options in effect: | |
| <tt>receive.denyCurrentBranch</tt> (for pushes to the checked out | |
| branch), <tt>receive.denyNonFastForwards</tt> (for forced | |
| non-fast-forward updates), <tt>receive.denyDeletes</tt> or | |
| <tt>receive.denyDeleteCurrent</tt>. See <a href="git-config.html">git-config(1)</a>. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| remote failure | |
| </dt> | |
| <dd> | |
| <p> | |
| The remote end did not report the successful update of the ref, | |
| perhaps because of a temporary error on the remote side, a | |
| break in the network connection, or other transient error. | |
| </p> | |
| </dd> | |
| </dl></div> | |
| </dd> | |
| <dt class="hdlist1"> | |
| from | |
| </dt> | |
| <dd> | |
| <p> | |
| The name of the local ref being pushed, minus its | |
| <tt>refs/<type>/</tt> prefix. In the case of deletion, the | |
| name of the local ref is omitted. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| to | |
| </dt> | |
| <dd> | |
| <p> | |
| The name of the remote ref being updated, minus its | |
| <tt>refs/<type>/</tt> prefix. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| reason | |
| </dt> | |
| <dd> | |
| <p> | |
| A human-readable explanation. In the case of successfully pushed | |
| refs, no explanation is needed. For a failed ref, the reason for | |
| failure is described. | |
| </p> | |
| </dd> | |
| </dl></div> | |
| </div> | |
| <h2 id="_note_about_fast_forwards">Note about fast-forwards</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>When an update changes a branch (or more in general, a ref) that used to | |
| point at commit A to point at another commit B, it is called a | |
| fast-forward update if and only if B is a descendant of A.</p></div> | |
| <div class="paragraph"><p>In a fast-forward update from A to B, the set of commits that the original | |
| commit A built on top of is a subset of the commits the new commit B | |
| builds on top of. Hence, it does not lose any history.</p></div> | |
| <div class="paragraph"><p>In contrast, a non-fast-forward update will lose history. For example, | |
| suppose you and somebody else started at the same commit X, and you built | |
| a history leading to commit B while the other person built a history | |
| leading to commit A. The history looks like this:</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><tt> B | |
| / | |
| ---X---A</tt></pre> | |
| </div></div> | |
| <div class="paragraph"><p>Further suppose that the other person already pushed changes leading to A | |
| back to the original repository you two obtained the original commit X.</p></div> | |
| <div class="paragraph"><p>The push done by the other person updated the branch that used to point at | |
| commit X to point at commit A. It is a fast-forward.</p></div> | |
| <div class="paragraph"><p>But if you try to push, you will attempt to update the branch (that | |
| now points at A) with commit B. This does <em>not</em> fast-forward. If you did | |
| so, the changes introduced by commit A will be lost, because everybody | |
| will now start building on top of B.</p></div> | |
| <div class="paragraph"><p>The command by default does not allow an update that is not a fast-forward | |
| to prevent such loss of history.</p></div> | |
| <div class="paragraph"><p>If you do not want to lose your work (history from X to B) nor the work by | |
| the other person (history from X to A), you would need to first fetch the | |
| history from the repository, create a history that contains changes done | |
| by both parties, and push the result back.</p></div> | |
| <div class="paragraph"><p>You can perform "git pull", resolve potential conflicts, and "git push" | |
| the result. A "git pull" will create a merge commit C between commits A | |
| and B.</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><tt> B---C | |
| / / | |
| ---X---A</tt></pre> | |
| </div></div> | |
| <div class="paragraph"><p>Updating A with the resulting merge commit will fast-forward and your | |
| push will be accepted.</p></div> | |
| <div class="paragraph"><p>Alternatively, you can rebase your change between X and B on top of A, | |
| with "git pull --rebase", and push the result back. The rebase will | |
| create a new commit D that builds the change between X and B on top of | |
| A.</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><tt> B D | |
| / / | |
| ---X---A</tt></pre> | |
| </div></div> | |
| <div class="paragraph"><p>Again, updating A with this commit will fast-forward and your push will be | |
| accepted.</p></div> | |
| <div class="paragraph"><p>There is another common situation where you may encounter non-fast-forward | |
| rejection when you try to push, and it is possible even when you are | |
| pushing into a repository nobody else pushes into. After you push commit | |
| A yourself (in the first picture in this section), replace it with "git | |
| commit --amend" to produce commit B, and you try to push it out, because | |
| forgot that you have pushed A out already. In such a case, and only if | |
| you are certain that nobody in the meantime fetched your earlier commit A | |
| (and started building on top of it), you can run "git push --force" to | |
| overwrite it. In other words, "git push --force" is a method reserved for | |
| a case where you do mean to lose history.</p></div> | |
| </div> | |
| <h2 id="_examples">Examples</h2> | |
| <div class="sectionbody"> | |
| <div class="dlist"><dl> | |
| <dt class="hdlist1"> | |
| <tt>git push</tt> | |
| </dt> | |
| <dd> | |
| <p> | |
| Works like <tt>git push <remote></tt>, where <remote> is the | |
| current branch’s remote (or <tt>origin</tt>, if no remote is | |
| configured for the current branch). | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| <tt>git push origin</tt> | |
| </dt> | |
| <dd> | |
| <p> | |
| Without additional configuration, works like | |
| <tt>git push origin :</tt>. | |
| </p> | |
| <div class="paragraph"><p>The default behavior of this command when no <refspec> is given can be | |
| configured by setting the <tt>push</tt> option of the remote.</p></div> | |
| <div class="paragraph"><p>For example, to default to pushing only the current branch to <tt>origin</tt> | |
| use <tt>git config remote.origin.push HEAD</tt>. Any valid <refspec> (like | |
| the ones in the examples below) can be configured as the default for | |
| <tt>git push origin</tt>.</p></div> | |
| </dd> | |
| <dt class="hdlist1"> | |
| <tt>git push origin :</tt> | |
| </dt> | |
| <dd> | |
| <p> | |
| Push "matching" branches to <tt>origin</tt>. See | |
| <refspec> in the <a href="#OPTIONS">OPTIONS</a> section above for a | |
| description of "matching" branches. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| <tt>git push origin master</tt> | |
| </dt> | |
| <dd> | |
| <p> | |
| Find a ref that matches <tt>master</tt> in the source repository | |
| (most likely, it would find <tt>refs/heads/master</tt>), and update | |
| the same ref (e.g. <tt>refs/heads/master</tt>) in <tt>origin</tt> repository | |
| with it. If <tt>master</tt> did not exist remotely, it would be | |
| created. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| <tt>git push origin HEAD</tt> | |
| </dt> | |
| <dd> | |
| <p> | |
| A handy way to push the current branch to the same name on the | |
| remote. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| <tt>git push origin master:satellite/master dev:satellite/dev</tt> | |
| </dt> | |
| <dd> | |
| <p> | |
| Use the source ref that matches <tt>master</tt> (e.g. <tt>refs/heads/master</tt>) | |
| to update the ref that matches <tt>satellite/master</tt> (most probably | |
| <tt>refs/remotes/satellite/master</tt>) in the <tt>origin</tt> repository, then | |
| do the same for <tt>dev</tt> and <tt>satellite/dev</tt>. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| <tt>git push origin HEAD:master</tt> | |
| </dt> | |
| <dd> | |
| <p> | |
| Push the current branch to the remote ref matching <tt>master</tt> in the | |
| <tt>origin</tt> repository. This form is convenient to push the current | |
| branch without thinking about its local name. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| <tt>git push origin master:refs/heads/experimental</tt> | |
| </dt> | |
| <dd> | |
| <p> | |
| Create the branch <tt>experimental</tt> in the <tt>origin</tt> repository | |
| by copying the current <tt>master</tt> branch. This form is only | |
| needed to create a new branch or tag in the remote repository when | |
| the local name and the remote name are different; otherwise, | |
| the ref name on its own will work. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| <tt>git push origin :experimental</tt> | |
| </dt> | |
| <dd> | |
| <p> | |
| Find a ref that matches <tt>experimental</tt> in the <tt>origin</tt> repository | |
| (e.g. <tt>refs/heads/experimental</tt>), and delete it. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| <tt>git push origin +dev:master</tt> | |
| </dt> | |
| <dd> | |
| <p> | |
| Update the origin repository’s master branch with the dev branch, | |
| allowing non-fast-forward updates. <strong>This can leave unreferenced | |
| commits dangling in the origin repository.</strong> Consider the | |
| following situation, where a fast-forward is not possible: | |
| </p> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><tt> o---o---o---A---B origin/master | |
| \ | |
| X---Y---Z dev</tt></pre> | |
| </div></div> | |
| <div class="paragraph"><p>The above command would change the origin repository to</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><tt> A---B (unnamed branch) | |
| / | |
| o---o---o---X---Y---Z master</tt></pre> | |
| </div></div> | |
| <div class="paragraph"><p>Commits A and B would no longer belong to a branch with a symbolic name, | |
| and so would be unreachable. As such, these commits would be removed by | |
| a <tt>git gc</tt> command on the origin repository.</p></div> | |
| </dd> | |
| </dl></div> | |
| </div> | |
| <h2 id="_git">GIT</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>Part of the <a href="git.html">git(1)</a> suite</p></div> | |
| </div> | |
| <div id="footer"> | |
| <div id="footer-text"> | |
| Last updated 2011-08-05 00:04:52 UTC | |
| </div> | |
| </div> | |
| </body> | |
| </html> |