Difference Git Merge and Git Rebase | MERGE vs REBASE |
Both "git merge" and "git rebase" are used in Git to integrate changes from one branch into another, but they do so in different ways. Here are the key differences between "git merge" and "git rebase":
Git Merge:
Merge Commit: When you perform a merge, Git creates a new merge commit that combines the changes from the source branch into the target branch. This creates a clear history of when the merge occurred.
Branch History: The branch history remains preserved, as the merge commit shows that a merge took place between the branches.
No Rewriting History: Merged commits retain their original commit hashes and commit history. This can make the history a bit more cluttered, but it reflects the actual sequence of development.
Parallel Development: Merging is suitable for scenarios where parallel development is important and the history does not need to be linear.
Git Rebase:
Linear History: When you perform a rebase, Git transplants the commits from the source branch onto the tip of the target branch. This creates a linear history where it appears that the changes on the source branch happened directly on the target branch.
No Merge Commits: Rebase avoids creating merge commits in the target branch. This can result in a cleaner commit history without as many branching and merging indicators.
Rewriting History: As commits are applied on top of the target branch, their commit hashes can change. This means you're effectively rewriting history, which can be problematic if the changes have already been shared with others.
Continuous Integration: Rebase is often used when working in feature branches to keep up-to-date with the latest changes on the main branch. It helps maintain a linear and clean history.
Interactive Rebase: Git rebase allows you to interactively edit, reorder, squash, or even drop commits during the rebase process, providing greater control over the commit history.
When to Use Which:
Use "git merge" when you want to combine changes from one branch into another and create a clear merge commit to show the integration point. This is suitable for shared or stable branches.
Use "git rebase" when you want to maintain a linear commit history by integrating changes from one branch onto another without creating merge commits. This is useful for feature branches that are still in development.
If you're working on a feature branch and want to integrate changes from the main branch before merging, you can use "git rebase" to keep your branch up-to-date and maintain a clean history.
It's important to consider the collaboration workflow, the visibility of your commit history, and the potential impact on shared branches and other collaborators when deciding whether to use "git merge" or "git rebase."
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