What is the purpose of the git submodule command?

The git submodule command is used to manage submodules within a Git repository. Submodules are independent Git repositories that can work together with the main repository. Using submodules allows external Git repositories to be included as part of the local repository.

The functions of the git submodule command include:

1. Initialize submodules: The git submodule init command can be used to initialize the defined submodules in the repository. This will create a directory for the submodule in the local repository and download the source code for the submodule.
2. Update submodules: You can update the code of submodules using the git submodule update command. Use this command to fetch the latest code if the specified version of the submodule has changed.
3. Add a submodule: You can use the git submodule add command to add an external Git repository as a submodule to the main repository. This will create a directory for the submodule in the main repository and download the submodule’s source code into that directory.
4. Remove submodule: by using the git submodule deinit command, you can remove a submodule from the main repository. This will delete the submodule directory and remove the submodule’s related information from the main repository.
5. Other operations related to submodules: You can also use other git submodule commands to manage submodules, such as git submodule status to display the status of submodules, and git submodule foreach to perform specified operations on all submodules.

By using the git submodule command, it is possible to better manage and collaborate among multiple Git repositories, making code organization and maintenance more flexible and convenient.