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diff --git a/Documentation/git-submodule.txt b/Documentation/git-submodule.txt new file mode 100644 index 000000000000..0ed5c24dc1ce --- /dev/null +++ b/Documentation/git-submodule.txt @@ -0,0 +1,441 @@ +git-submodule(1) +================ + +NAME +---- +git-submodule - Initialize, update or inspect submodules + + +SYNOPSIS +-------- +[verse] +'git submodule' [--quiet] [--cached] +'git submodule' [--quiet] add [<options>] [--] <repository> [<path>] +'git submodule' [--quiet] status [--cached] [--recursive] [--] [<path>...] +'git submodule' [--quiet] init [--] [<path>...] +'git submodule' [--quiet] deinit [-f|--force] (--all|[--] <path>...) +'git submodule' [--quiet] update [<options>] [--] [<path>...] +'git submodule' [--quiet] set-branch [<options>] [--] <path> +'git submodule' [--quiet] summary [<options>] [--] [<path>...] +'git submodule' [--quiet] foreach [--recursive] <command> +'git submodule' [--quiet] sync [--recursive] [--] [<path>...] +'git submodule' [--quiet] absorbgitdirs [--] [<path>...] + + +DESCRIPTION +----------- +Inspects, updates and manages submodules. + +For more information about submodules, see linkgit:gitsubmodules[7]. + +COMMANDS +-------- +With no arguments, shows the status of existing submodules. Several +subcommands are available to perform operations on the submodules. + +add [-b <branch>] [-f|--force] [--name <name>] [--reference <repository>] [--depth <depth>] [--] <repository> [<path>]:: + 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` 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`. + +status [--cached] [--recursive] [--] [<path>...]:: + 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' 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 `--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, +linkgit:git-status[1] and linkgit:git-diff[1] will provide that information +too (and can also report changes to a submodule's work tree). + +init [--] [<path>...]:: + Initialize the submodules recorded in the index (which were + added and committed elsewhere) by setting `submodule.$name.url` + in .git/config. It uses the same setting from `.gitmodules` as + a template. If the URL is relative, it will be resolved using + the default remote. If there is no default remote, the current + repository will be assumed to be upstream. ++ +Optional <path> arguments limit which submodules will be initialized. +If no path is specified and submodule.active has been configured, submodules +configured to be active will be initialized, otherwise all submodules are +initialized. ++ +When present, it will also copy the value of `submodule.$name.update`. +This command does not alter existing information in .git/config. +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. + +deinit [-f|--force] (--all|[--] <path>...):: + 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 linkgit:git-rm[1] instead. See linkgit:gitsubmodules[7] for removal +options. + +update [--init] [--remote] [-N|--no-fetch] [--[no-]recommend-shallow] [-f|--force] [--checkout|--rebase|--merge] [--reference <repository>] [--depth <depth>] [--recursive] [--jobs <n>] [--] [<path>...]:: ++ +-- +Update the registered submodules to match what the superproject +expects by cloning missing submodules and updating the working tree of +the submodules. The "updating" can be done in several ways depending +on command line options and the value of `submodule.<name>.update` +configuration variable. The command line option takes precedence over +the configuration variable. If neither is given, a 'checkout' is performed. +The 'update' procedures supported both from the command line as well as +through the `submodule.<name>.update` configuration are: + + checkout;; the commit recorded in the superproject will be + checked out in the submodule on a detached HEAD. ++ +If `--force` is specified, the submodule will be checked out (using +`git checkout --force`), even if the commit specified +in the index of the containing repository already matches the commit +checked out in the submodule. + + rebase;; the current branch of the submodule will be rebased + onto the commit recorded in the superproject. + + merge;; the commit recorded in the superproject will be merged + into the current branch in the submodule. + +The following 'update' procedures are only available via the +`submodule.<name>.update` configuration variable: + + custom command;; arbitrary shell command that takes a single + argument (the sha1 of the commit recorded in the + superproject) is executed. When `submodule.<name>.update` + is set to '!command', the remainder after the exclamation mark + is the custom command. + + none;; the submodule is not updated. + +If the submodule is not yet initialized, and you just want to use the +setting as stored in `.gitmodules`, you can automatically initialize the +submodule with the `--init` option. + +If `--recursive` is specified, this command will recurse into the +registered submodules, and update any nested submodules within. +-- +set-branch ((-d|--default)|(-b|--branch <branch>)) [--] <path>:: + Sets 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 'master'. + +summary [--cached|--files] [(-n|--summary-limit) <n>] [commit] [--] [<path>...]:: + 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 linkgit:git-diff[1] will provide that +information too. + +foreach [--recursive] <command>:: + Evaluates an arbitrary shell command in each checked out submodule. + The command has access to the variables $name, $sm_path, $displaypath, + $sha1 and $toplevel: + $name is the name of the relevant submodule section in `.gitmodules`, + $sm_path is the path of the submodule as recorded in the immediate + superproject, $displaypath contains the relative path from the + current working directory to the submodules root directory, + $sha1 is the commit as recorded in the immediate + superproject, and $toplevel is the absolute path to the top-level + of the immediate superproject. + Note that to avoid conflicts with '$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 $path `git rev-parse HEAD`' +-------------- + +sync [--recursive] [--] [<path>...]:: + Synchronizes submodules' remote URL configuration setting + to the value specified in `.gitmodules`. It will only affect those + submodules which already have a URL entry in .git/config (that is the + case when they are initialized or freshly added). This is useful when + submodule URLs change upstream and you need to update your local + repositories accordingly. ++ +`git submodule sync` synchronizes all submodules while +`git submodule sync -- A` synchronizes submodule "A" only. ++ +If `--recursive` is specified, this command will recurse into the +registered submodules, and sync any nested submodules within. + +absorbgitdirs:: + If a git directory of a submodule is inside the submodule, + move the git directory of the submodule into its superprojects + `$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. + +OPTIONS +------- +-q:: +--quiet:: + Only print error messages. + +--progress:: + This option is only valid for add and update commands. + 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. + +--all:: + This option is only valid for the deinit command. Unregister all + submodules in the working tree. + +-b <branch>:: +--branch <branch>:: + Branch of repository to add as submodule. + The name of the branch is recorded as `submodule.<name>.branch` in + `.gitmodules` for `update --remote`. A special value of `.` is used to + indicate that the name of the branch in the submodule should be the + same name as the current branch in the current repository. If the + option is not specified, it defaults to 'master'. + +-f:: +--force:: + This option is only valid for add, deinit and update commands. + When running add, allow adding an otherwise ignored submodule path. + When running deinit the submodule working trees will be removed even + if they contain local changes. + When running update (only effective with the checkout procedure), + throw away local changes in submodules when switching to a + different commit; and always run a checkout operation in the + submodule, even if the commit listed in the index of the + containing repository matches the commit checked out in the + submodule. + +--cached:: + This option is only valid for status and summary commands. These + commands typically use the commit found in the submodule HEAD, but + with this option, the commit stored in the index is used instead. + +--files:: + This option is only valid for the summary command. This command + compares the commit in the index with that in the submodule HEAD + when this option is used. + +-n:: +--summary-limit:: + This option is only valid for the summary command. + Limit the summary size (number of commits shown in total). + Giving 0 will disable the summary; a negative number means unlimited + (the default). This limit only applies to modified submodules. The + size is always limited to 1 for added/deleted/typechanged submodules. + +--remote:: + This option is only valid for the update command. Instead of using + the superproject's recorded SHA-1 to update the submodule, use the + status of the submodule's remote-tracking branch. The remote used + is branch's remote (`branch.<name>.remote`), defaulting to `origin`. + The remote branch used defaults to `master`, but the branch name may + be overridden by setting the `submodule.<name>.branch` option in + either `.gitmodules` or `.git/config` (with `.git/config` taking + precedence). ++ +This works for any of the supported update procedures (`--checkout`, +`--rebase`, etc.). The only change is the source of the target SHA-1. +For example, `submodule update --remote --merge` will merge upstream +submodule changes into the submodules, while `submodule update +--merge` will merge superproject gitlink changes into the submodules. ++ +In order to ensure a current tracking branch state, `update --remote` +fetches the submodule's remote repository before calculating the +SHA-1. If you don't want to fetch, you should use `submodule update +--remote --no-fetch`. ++ +Use this option to integrate changes from the upstream subproject with +your submodule's current HEAD. Alternatively, you can run `git pull` +from the submodule, which is equivalent except for the remote branch +name: `update --remote` uses the default upstream repository and +`submodule.<name>.branch`, while `git pull` uses the submodule's +`branch.<name>.merge`. Prefer `submodule.<name>.branch` if you want +to distribute the default upstream branch with the superproject and +`branch.<name>.merge` if you want a more native feel while working in +the submodule itself. + +-N:: +--no-fetch:: + This option is only valid for the update command. + Don't fetch new objects from the remote site. + +--checkout:: + This option is only valid for the update command. + Checkout the commit recorded in the superproject on a detached HEAD + in the submodule. This is the default behavior, the main use of + this option is to override `submodule.$name.update` when set to + a value other than `checkout`. + If the key `submodule.$name.update` is either not explicitly set or + set to `checkout`, this option is implicit. + +--merge:: + This option is only valid for the update command. + Merge the commit recorded in the superproject into the current branch + of the submodule. If this option is given, the submodule's HEAD will + not be detached. If a merge failure prevents this process, you will + have to resolve the resulting conflicts within the submodule with the + usual conflict resolution tools. + If the key `submodule.$name.update` is set to `merge`, this option is + implicit. + +--rebase:: + This option is only valid for the update command. + Rebase the current branch onto the commit recorded in the + superproject. If this option is given, the submodule's HEAD will not + be detached. If a merge failure prevents this process, you will have + to resolve these failures with linkgit:git-rebase[1]. + If the key `submodule.$name.update` is set to `rebase`, this option is + implicit. + +--init:: + This option is only valid for the update command. + Initialize all submodules for which "git submodule init" has not been + called so far before updating. + +--name:: + This option is only valid for the add command. It sets the submodule's + name to the given string instead of defaulting to its path. The name + must be valid as a directory name and may not end with a '/'. + +--reference <repository>:: + This option is only valid for add and update commands. These + commands sometimes need to clone a remote repository. In this case, + this option will be passed to the linkgit:git-clone[1] command. ++ +*NOTE*: Do *not* use this option unless you have read the note +for linkgit:git-clone[1]'s `--reference`, `--shared`, and `--dissociate` +options carefully. + +--dissociate:: + This option is only valid for add and update commands. These + commands sometimes need to clone a remote repository. In this case, + this option will be passed to the linkgit:git-clone[1] command. ++ +*NOTE*: see the NOTE for the `--reference` option. + +--recursive:: + This option is only valid for foreach, update, status and sync commands. + Traverse submodules recursively. The operation is performed not + only in the submodules of the current repo, but also + in any nested submodules inside those submodules (and so on). + +--depth:: + This option is valid for add and update commands. Create a 'shallow' + clone with a history truncated to the specified number of revisions. + See linkgit:git-clone[1] + +--[no-]recommend-shallow:: + This option is only valid for the update command. + The initial clone of a submodule will use the recommended + `submodule.<name>.shallow` as provided by the `.gitmodules` file + by default. To ignore the suggestions use `--no-recommend-shallow`. + +-j <n>:: +--jobs <n>:: + This option is only valid for the update command. + Clone new submodules in parallel with as many jobs. + Defaults to the `submodule.fetchJobs` option. + +<path>...:: + Paths to submodule(s). When specified this will restrict the command + to only operate on the submodules found at the specified paths. + (This argument is required with add). + +FILES +----- +When initializing submodules, a `.gitmodules` file in the top-level directory +of the containing repository is used to find the url of each submodule. +This file should be formatted in the same way as `$GIT_DIR/config`. The key +to each submodule url is "submodule.$name.url". See linkgit:gitmodules[5] +for details. + +SEE ALSO +-------- +linkgit:gitsubmodules[7], linkgit:gitmodules[5]. + +GIT +--- +Part of the linkgit:git[1] suite |