To delete the merge history of a file in Git, you need to rewrite the commit history of the file by using the
git filter-branch command. Follow the steps below:
- Backup your repository: It's always a good practice to backup your repository before making any significant changes. Make a copy of your repository or create a new branch for this operation.
- Open a terminal or command prompt and navigate to the repository's directory.
- Use the following command to rewrite the commit history of the file. Replace
git filter-branch --index-filter "git rm --cached --ignore-unmatch <filename>" --prune-empty -- --all
This command will rewrite the commit history, removing any occurrences of the specified file from all branches and tags. It removes the file from the index using
git rm --cached --ignore-unmatch <filename> and then prunes empty commits from Git's history.
- After executing the command, Git will rewrite the commit history. This process may take some time depending on the size of your repository. Once it completes, the merge history of the file will be erased.
- Verify the changes: Use tools like git log or visual Git clients to check the commit history and make sure the merge history of the file has been deleted. Also, compare the latest version of the file to ensure that it no longer contains any merged changes.
- Push the changes: If you are satisfied with the changes, push your updated branch or repository back to the remote Git server.
Please note that rewriting the commit history can have serious ramifications if other developers have already cloned the repository and built on top of those commits. Exercise caution when performing this operation and communicate the changes to anyone working on the repository to avoid conflicts.