Submodule

Submodule can be useful when a project is dependent on another isolated project on build. Such as a project your team is working on but maintained separately, or third party dependencies that are not available from any package manager.

Add Submodule

git submodule add <repository_url> <path_to_submodule>

Details of submodules can be inspected from .gitmodules

Remove Submodule

git rm path/to/submodule

This deletes both physical storage of the submodule and its info in .gitmodules. Note that its history would still be reserved in case you wanted to inspect the old commits. You can manually delete it from .git/modules/<submodule> if you want to wipe out completely.