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Discover how to transfer commits from an accidentally created nested Git repository to its parent repository using `git subtree`, keeping your history intact.
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How to Safely Transfer Commits from a Nested Git Repository to the Outer One

Accidentally creating a Git repository inside another repository can be a common mistake, especially when working with new frameworks or tools. This situation often leads to confusion, particularly if you've made multiple commits in the inner repository (the nested one) and now wish to consolidate everything back into the outer repository. Fortunately, there’s a solution! In this post, we’ll walk through how to transfer your commits from the inner repository to the outer one and remove the nested repository safely.

The Problem

Imagine you've cloned a Git repository for your project, and during development with a new framework, a new repository was unintentionally created within the existing one. As you added several commits to this inner repo, you realized you needed to get these changes back into the outer repository. The question is: How can you move these commits without losing your history and remove the inner repository cleanly?

The Solution: Using git subtree

One effective approach to resolve this issue is by using the git subtree command. Here’s a step-by-step guide to transferring your commits from the nested repository to the outer one.

Step-by-Step Guide

Add Inner Repository to Outer Repository Using Git Subtree
Use the command below to add the inner repo to the outer repo. Replace my_new_repo_copy with your desired directory name, and adjust the paths accordingly.

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-P my_new_repo_copy: This specifies the prefix where the inner repository will be placed in the outer repository.

./my_new_repo/.git/: This points to the path of the inner repository.

master: This is the branch from the inner repo that you're adding.

Remove the Inner Repository
After successfully adding the inner repository, you should clean up by removing it. Use the following command:

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Rename the Copied Directory
If you want to rename your copied inner repository to its original name, run:

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Add and Commit Changes
To ensure all your changes are committed in the outer repository, run:

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The last git add and git commit were primarily for renaming the inner repository, but all your previous commits from the inner repo are preserved by subtree.

What to Expect

While the process is not entirely clean, utilizing git subtree allows you to maintain the commit history from your inner repository. This is crucial for tracking changes and understanding the evolution of your project. The key takeaway is that you managed to safely consolidate your commits while getting rid of the nested repository.

Conclusion

Mistakes happen, especially in the world of coding and version control. By understanding how to use git subtree, you can effectively organize your repositories and maintain a clean project structure. Moving commits from an inner Git repository to an outer one is not only possible but can be done while preserving the history that is vital for your project's progress.

If you find yourself in a similar situation, just follow these steps, and you’ll be on your way to successfully managing your Git repositories like a pro!