Git - git-submodule Documentation

Add the given repository as a submodule at the given path to the changeset to be committed next to the current project: the current project is termed the "superproject".

<repository> is the URL of the new submodule’s origin repository. This may be either an absolute URL, or (if it begins with ./ or ../), the location relative to the superproject’s default remote repository (Please note that to specify a repository foo.git which is located right next to a superproject bar.git, you’ll have to use ../foo.git instead of ./foo.git - as one might expect when following the rules for relative URLs - because the evaluation of relative URLs in Git is identical to that of relative directories).

The default remote is the remote of the remote-tracking branch of the current branch. If no such remote-tracking branch exists or the HEAD is detached, origin is assumed to be the default remote. If the superproject doesn’t have a default remote configured the superproject is its own authoritative upstream and the current working directory is used instead.

The optional argument <path> is the relative location for the cloned submodule to exist in the superproject. If <path> is not given, the canonical part of the source repository is used (repo for /path/to/repo.git and foo for host.xz:foo/.git). If <path> exists and is already a valid Git repository, then it is staged for commit without cloning. The <path> is also used as the submodule’s logical name in its configuration entries unless --name <name> is used to specify a logical name.

The given URL is recorded into .gitmodules for use by subsequent users cloning the superproject. If the URL is given relative to the superproject’s repository, the presumption is the superproject and submodule repositories will be kept together in the same relative location, and only the superproject’s URL needs to be provided. git-submodule will correctly locate the submodule using the relative URL in .gitmodules.

If --ref-format <format> is specified, the ref storage format of newly cloned submodules will be set accordingly.

Show the status of the submodules. This will print the SHA-1 of the currently checked out commit for each submodule, along with the submodule path and the output of git-describe[1] for the SHA-1. Each SHA-1 will possibly be prefixed with - if the submodule is not initialized, + if the currently checked out submodule commit does not match the SHA-1 found in the index of the containing repository and U if the submodule has merge conflicts.

If --cached is specified, this command will instead print the SHA-1 recorded in the superproject for each submodule.

If --recursive is specified, this command will recurse into nested submodules, and show their status as well.

If you are only interested in changes of the currently initialized submodules with respect to the commit recorded in the index or the HEAD, git-status[1] and git-diff[1] will provide that information too (and can also report changes to a submodule’s work tree).

Initialize the submodules recorded in the index (which were added and committed elsewhere) by setting submodule.$name.url in .git/config, using the same setting from .gitmodules as a template. If the URL is relative, it will be resolved using the default remote. If there is no default remote, the current repository will be assumed to be upstream.

Optional <path> arguments limit which submodules will be initialized. If no path is specified and submodule.active has been configured, submodules configured to be active will be initialized, otherwise all submodules are initialized.

It will also copy the value of submodule.$name.update, if present in the .gitmodules file, to .git/config, but (1) this command does not alter existing information in .git/config, and (2) submodule.$name.update that is set to a custom command is not copied for security reasons.

You can then customize the submodule clone URLs in .git/config for your local setup and proceed to git submodule update; you can also just use git submodule update --init without the explicit init step if you do not intend to customize any submodule locations.

See the add subcommand for the definition of default remote.

Unregister the given submodules, i.e. remove the whole submodule.$name section from .git/config together with their work tree. Further calls to git submodule update, git submodule foreach and git submodule sync will skip any unregistered submodules until they are initialized again, so use this command if you don’t want to have a local checkout of the submodule in your working tree anymore.

When the command is run without pathspec, it errors out, instead of deinit-ing everything, to prevent mistakes.

If --force is specified, the submodule’s working tree will be removed even if it contains local modifications.

If you really want to remove a submodule from the repository and commit that use git-rm[1] instead. See gitsubmodules[7] for removal options.

Set the default remote tracking branch for the submodule. The --branch option allows the remote branch to be specified. The --default option removes the submodule.<name>.branch configuration key, which causes the tracking branch to default to the remote HEAD.

Set the URL of the specified submodule to <newurl>. Then, it will automatically synchronize the submodule’s new remote URL configuration.

Show commit summary between the given commit (defaults to HEAD) and working tree/index. For a submodule in question, a series of commits in the submodule between the given super project commit and the index or working tree (switched by --cached) are shown. If the option --files is given, show the series of commits in the submodule between the index of the super project and the working tree of the submodule (this option doesn’t allow to use the --cached option or to provide an explicit commit).

Using the --submodule=log option with git-diff[1] will provide that information too.

Evaluate an arbitrary shell <command> in each checked out submodule. The command has access to the variables $name, $sm_path, $displaypath, $sha1 and $toplevel:

Note that to avoid conflicts with $PATH on Windows, the $path variable is now a deprecated synonym of $sm_path variable. Any submodules defined in the superproject but not checked out are ignored by this command. Unless given --quiet, foreach prints the name of each submodule before evaluating the command. If --recursive is given, submodules are traversed recursively (i.e. the given shell command is evaluated in nested submodules as well). A non-zero return from the command in any submodule causes the processing to terminate. This can be overridden by adding ||: to the end of the command.

As an example, the command below will show the path and currently checked out commit for each submodule:

git submodule foreach 'echo $sm_path `git rev-parse HEAD`'

Synchronize submodules' remote URL configuration setting to the value specified in .gitmodules. It will only affect those submodules which already have a URL entry in .git/config (that is the case when they are initialized or freshly added). This is useful when submodule URLs change upstream and you need to update your local repositories accordingly.

git submodule sync synchronizes all submodules while git submodule sync -- A synchronizes submodule A only.

If --recursive is specified, this command will recurse into the registered submodules, and sync any nested submodules within.

If a git directory of a submodule is inside the submodule, move the git directory of the submodule into its superproject’s $GIT_DIR/modules path and then connect the git directory and its working directory by setting the core.worktree and adding a .git file pointing to the git directory embedded in the superprojects git directory.

A repository that was cloned independently and later added as a submodule or old setups have the submodules git directory inside the submodule instead of embedded into the superprojects git directory.

This command is recursive by default.