git submodule

Inspects, updates and manages submodules. More information: https://git-scm.com/docs/git-submodule.

• Install a repository's specified submodules:
  git submodule update --init --recursive
• Add a Git repository as a submodule:
  git submodule add {{repository_url}}
• Add a Git repository as a submodule at the specified directory:
  git submodule add {{repository_url}} {{path/to/directory}}
• Update every submodule to its latest commit:
  git submodule foreach git pull