![]() This is more flexible and straightforward than copying and pasting, as you won’t need to periodically go back and paste in updated code for multiple projects. When you add your component as a submodule, you can easily update it in multiple repositories. This creates a cleaner repository and allows you to continue to work on components without breaking the overall functionality of your project.Īdditionally, you can reuse a component you've created across multiple projects. You can break up extensive codebases with multiple components to make them easier to handle or to delegate specific tasks for each component.Įach component can be added to your main project repository as a submodule. Separating code is one of the most common uses of git submodules in large, complex projects. This means you can continue working on the repository from which you pulled the code without breaking your current project. Not only does it allow you to reuse code from other projects, but you are grabbing a snapshot of a commit. Git submodule is a valuable command to have in your toolbox for a variety of situations. However, it is not as powerful as git submodule since you cannot handle changes to the external repository. ![]() This can be a great option if you’re working in a specific language with a supportive community and already have everything installed and appropriately versioned. The second option is to use a language package management system like NPM for Node or Gems for Ruby. While this is a quick and easy way to reuse old code, it's not ideal since you will lose any upstream changes unless you copy and paste the updated code too. The first is simply copying code from the external repository and pasting it into your main repository. Instead of using git submodule to reuse code, you have two options. This is great if you have made changes to the submodule commit but want to use that previous snapshot because you know it works correctly with your current project. This submodule information acts as a link to a specific commit.īecause the code is not added to the main repository, the submodule update git is not committed when you update your main repository. When using git submodule, you are not actually adding any code through the submodule but instead adding information about the submodule. Git submodule allows you to embed a repository within your main or ‘master’ repository. What is Git Submodule?Ī Git submodule is essentially an external repository contained in your local repository to leverage existing code in additional projects. ![]() ![]() It is the preferred option because it can point to a snapshot of a specific commit in another repository.Ĭontinue reading to learn more about how git submodule works, the best use cases for git submodule, and how to use git submodule safely and effectively. A git submodule references another repository so that you can incorporate external code. This is where the git submodule command comes in. Several options exist for accomplishing this, whether that be copying and pasting the code from the external repository or using a specific package management system like NPM.ĭespite their convenience, these methods have limitations, such as being unable to track changes made to external git repositories. When you begin a new project, you may want to use an external git repo to reference preexisting code. How to Clone Project Repositories with Submodules.
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