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![Taylor Blau](/assets/img/avatar_default.png)
When renaming a remote, Git needs to rename all remote tracking references to the remote's new name (e.g., renaming "refs/remotes/old/foo" to "refs/remotes/new/foo" when renaming a remote from "old" to "new"). This can be somewhat slow when there are many references to rename, since each rename is done in a separate call to rename_ref() as opposed to grouping all renames together into the same transaction. It would be nice to execute all renames as a single transaction, but there is a snag: the reference transaction backend doesn't support renames during a transaction (only individually, via rename_ref()). The reasons there are described in more detail in [1], but the main problem is that in order to preserve the existing reflog, it must be moved while holding both locks (i.e., on "oldname" and "newname"), and the ref transaction code doesn't support inserting arbitrary actions into the middle of a transaction like that. As an aside, adding support for this to the ref transaction code is less straightforward than inserting both a ref_update() and ref_delete() call into the same transaction. rename_ref()'s special handling to detect D/F conflicts would need to be rewritten for the transaction code if we wanted to proactively catch D/F conflicts when renaming a reference during a transaction. The reftable backend could support this much more readily because of its lack of D/F conflicts. Instead of a more complex modification to the ref transaction code, display a progress meter when running verbosely in order to convince the user that Git is doing work while renaming a remote. This is mostly done as-expected, with the minor caveat that we intentionally count symrefs renames twice, since renaming a symref takes place over two separate calls (one to delete the old one, and another to create the new one). [1]: https://lore.kernel.org/git/572367B4.4050207@alum.mit.edu/ Suggested-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
268 lines
8.5 KiB
Plaintext
268 lines
8.5 KiB
Plaintext
git-remote(1)
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=============
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NAME
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----
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git-remote - Manage set of tracked repositories
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SYNOPSIS
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--------
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[verse]
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'git remote' [-v | --verbose]
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'git remote add' [-t <branch>] [-m <master>] [-f] [--[no-]tags] [--mirror=(fetch|push)] <name> <URL>
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'git remote rename' [--[no-]progress] <old> <new>
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'git remote remove' <name>
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'git remote set-head' <name> (-a | --auto | -d | --delete | <branch>)
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'git remote set-branches' [--add] <name> <branch>...
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'git remote get-url' [--push] [--all] <name>
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'git remote set-url' [--push] <name> <newurl> [<oldurl>]
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'git remote set-url --add' [--push] <name> <newurl>
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'git remote set-url --delete' [--push] <name> <URL>
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'git remote' [-v | --verbose] 'show' [-n] <name>...
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'git remote prune' [-n | --dry-run] <name>...
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'git remote' [-v | --verbose] 'update' [-p | --prune] [(<group> | <remote>)...]
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DESCRIPTION
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-----------
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Manage the set of repositories ("remotes") whose branches you track.
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OPTIONS
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-------
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-v::
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--verbose::
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Be a little more verbose and show remote url after name.
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NOTE: This must be placed between `remote` and subcommand.
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COMMANDS
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--------
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With no arguments, shows a list of existing remotes. Several
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subcommands are available to perform operations on the remotes.
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'add'::
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Add a remote named <name> for the repository at
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<URL>. The command `git fetch <name>` can then be used to create and
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update remote-tracking branches <name>/<branch>.
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+
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With `-f` option, `git fetch <name>` is run immediately after
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the remote information is set up.
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+
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With `--tags` option, `git fetch <name>` imports every tag from the
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remote repository.
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+
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With `--no-tags` option, `git fetch <name>` does not import tags from
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the remote repository.
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+
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By default, only tags on fetched branches are imported
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(see linkgit:git-fetch[1]).
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+
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With `-t <branch>` option, instead of the default glob
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refspec for the remote to track all branches under
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the `refs/remotes/<name>/` namespace, a refspec to track only `<branch>`
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is created. You can give more than one `-t <branch>` to track
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multiple branches without grabbing all branches.
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+
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With `-m <master>` option, a symbolic-ref `refs/remotes/<name>/HEAD` is set
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up to point at remote's `<master>` branch. See also the set-head command.
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+
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When a fetch mirror is created with `--mirror=fetch`, the refs will not
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be stored in the 'refs/remotes/' namespace, but rather everything in
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'refs/' on the remote will be directly mirrored into 'refs/' in the
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local repository. This option only makes sense in bare repositories,
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because a fetch would overwrite any local commits.
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+
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When a push mirror is created with `--mirror=push`, then `git push`
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will always behave as if `--mirror` was passed.
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'rename'::
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Rename the remote named <old> to <new>. All remote-tracking branches and
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configuration settings for the remote are updated.
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+
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In case <old> and <new> are the same, and <old> is a file under
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`$GIT_DIR/remotes` or `$GIT_DIR/branches`, the remote is converted to
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the configuration file format.
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'remove'::
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'rm'::
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Remove the remote named <name>. All remote-tracking branches and
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configuration settings for the remote are removed.
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'set-head'::
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Sets or deletes the default branch (i.e. the target of the
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symbolic-ref `refs/remotes/<name>/HEAD`) for
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the named remote. Having a default branch for a remote is not required,
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but allows the name of the remote to be specified in lieu of a specific
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branch. For example, if the default branch for `origin` is set to
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`master`, then `origin` may be specified wherever you would normally
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specify `origin/master`.
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+
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With `-d` or `--delete`, the symbolic ref `refs/remotes/<name>/HEAD` is deleted.
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+
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With `-a` or `--auto`, the remote is queried to determine its `HEAD`, then the
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symbolic-ref `refs/remotes/<name>/HEAD` is set to the same branch. e.g., if the remote
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`HEAD` is pointed at `next`, `git remote set-head origin -a` will set
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the symbolic-ref `refs/remotes/origin/HEAD` to `refs/remotes/origin/next`. This will
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only work if `refs/remotes/origin/next` already exists; if not it must be
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fetched first.
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+
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Use `<branch>` to set the symbolic-ref `refs/remotes/<name>/HEAD` explicitly. e.g., `git
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remote set-head origin master` will set the symbolic-ref `refs/remotes/origin/HEAD` to
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`refs/remotes/origin/master`. This will only work if
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`refs/remotes/origin/master` already exists; if not it must be fetched first.
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+
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'set-branches'::
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Changes the list of branches tracked by the named remote.
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This can be used to track a subset of the available remote branches
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after the initial setup for a remote.
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+
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The named branches will be interpreted as if specified with the
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`-t` option on the `git remote add` command line.
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+
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With `--add`, instead of replacing the list of currently tracked
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branches, adds to that list.
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'get-url'::
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Retrieves the URLs for a remote. Configurations for `insteadOf` and
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`pushInsteadOf` are expanded here. By default, only the first URL is listed.
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+
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With `--push`, push URLs are queried rather than fetch URLs.
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With `--all`, all URLs for the remote will be listed.
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'set-url'::
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Changes URLs for the remote. Sets first URL for remote <name> that matches
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regex <oldurl> (first URL if no <oldurl> is given) to <newurl>. If
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<oldurl> doesn't match any URL, an error occurs and nothing is changed.
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+
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With `--push`, push URLs are manipulated instead of fetch URLs.
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With `--add`, instead of changing existing URLs, new URL is added.
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+
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With `--delete`, instead of changing existing URLs, all URLs matching
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regex <URL> are deleted for remote <name>. Trying to delete all
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non-push URLs is an error.
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+
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Note that the push URL and the fetch URL, even though they can
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be set differently, must still refer to the same place. What you
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pushed to the push URL should be what you would see if you
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immediately fetched from the fetch URL. If you are trying to
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fetch from one place (e.g. your upstream) and push to another (e.g.
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your publishing repository), use two separate remotes.
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'show'::
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Gives some information about the remote <name>.
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With `-n` option, the remote heads are not queried first with
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`git ls-remote <name>`; cached information is used instead.
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'prune'::
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Deletes stale references associated with <name>. By default, stale
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remote-tracking branches under <name> are deleted, but depending on
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global configuration and the configuration of the remote we might even
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prune local tags that haven't been pushed there. Equivalent to `git
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fetch --prune <name>`, except that no new references will be fetched.
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See the PRUNING section of linkgit:git-fetch[1] for what it'll prune
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depending on various configuration.
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With `--dry-run` option, report what branches would be pruned, but do not
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actually prune them.
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'update'::
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Fetch updates for remotes or remote groups in the repository as defined by
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`remotes.<group>`. If neither group nor remote is specified on the command line,
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the configuration parameter remotes.default will be used; if
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remotes.default is not defined, all remotes which do not have the
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configuration parameter `remote.<name>.skipDefaultUpdate` set to true will
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be updated. (See linkgit:git-config[1]).
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+
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With `--prune` option, run pruning against all the remotes that are updated.
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DISCUSSION
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----------
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The remote configuration is achieved using the `remote.origin.url` and
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`remote.origin.fetch` configuration variables. (See
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linkgit:git-config[1]).
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EXIT STATUS
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-----------
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On success, the exit status is `0`.
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When subcommands such as 'add', 'rename', and 'remove' can't find the
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remote in question, the exit status is `2`. When the remote already
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exists, the exit status is `3`.
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On any other error, the exit status may be any other non-zero value.
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EXAMPLES
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--------
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* Add a new remote, fetch, and check out a branch from it
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------------
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$ git remote
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origin
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$ git branch -r
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origin/HEAD -> origin/master
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origin/master
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$ git remote add staging git://git.kernel.org/.../gregkh/staging.git
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$ git remote
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origin
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staging
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$ git fetch staging
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...
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From git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
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* [new branch] master -> staging/master
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* [new branch] staging-linus -> staging/staging-linus
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* [new branch] staging-next -> staging/staging-next
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$ git branch -r
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origin/HEAD -> origin/master
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origin/master
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staging/master
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staging/staging-linus
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staging/staging-next
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$ git switch -c staging staging/master
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...
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------------
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* Imitate 'git clone' but track only selected branches
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------------
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$ mkdir project.git
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$ cd project.git
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$ git init
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$ git remote add -f -t master -m master origin git://example.com/git.git/
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$ git merge origin
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------------
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SEE ALSO
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--------
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linkgit:git-fetch[1]
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linkgit:git-branch[1]
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linkgit:git-config[1]
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GIT
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---
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Part of the linkgit:git[1] suite
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