git-submodule

Add submodule

$ git submodule add [url] [path]

$ git submodule init

$ git submodule update

$ git submodule update --init --recursive

$ git submodule status

$ git submodule update --remote

$ git submodule deinit [path] && git rm [path]

$ git submodule foreach "[command]"

git submodule command [options]

git submodule manages submodules, which are external Git repositories embedded within a parent repository at specific paths. Each submodule tracks a particular commit of the external repository.
Submodules allow projects to include and track dependencies or shared components while keeping their histories separate. Use `update --init --recursive` after cloning to populate all submodule contents.

--init

Initialize during update.

Recursive operation.

Use remote tracking branch.

Force operation.

.gitmodules

Configuration file mapping submodule names to their repository URLs and local paths.

add

Add submodule.

Initialize submodules.

Update submodules.

Show status.

Unregister submodule.

Sync URLs.

Run command in each.

Show commit summary.

git-clone(1), gitmodules(5)