Let's talk about how to cancel merge branches in GitLab

GitLab is a popular code hosting tool that provides many convenient features to assist team collaboration and development. One of the important features is merging branches. By merging branches, we can integrate different code development versions into a stable version. However, in some cases we may want to cancel a branch that has been merged. This is because some issues may not be discovered until after the merge, or we decide to roll back some changes. In this article, we will explain how to unmerge branches in GitLab.

First, we need to find the branch that has been merged. Open the GitLab project page and click the "Merge Requests" tab. On this page you will see a list of all merged branches. Find the merge request you want to cancel and click its title to open the request's details page.

On the request details page, you will see a "Revert" button. Clicking this button will open a new merge request that will undo the changes introduced by the previous merge request. In this new merge request, you need to fill in a short description explaining why you want to cancel the previous merge request. Then, click the "Submit" button to submit the new merge request.

Now that your new merge request has been created, it will automatically run builds and tests in GitLab to verify the changes. If this new merge request is successfully merged, the previous merge request will be canceled, which means that the previous changes will no longer exist in the project.

It should be noted that before trying to unmerge a branch, we need to evaluate whether it is necessary to do so. Revoking a merge request carries some risks, such as undoing changes that may cause problems in other code that already relies on those changes. Therefore, before withdrawing a merge request, it is recommended to discuss it with a team member and ensure that all risks and impacts are understood and assessed.

In short, GitLab provides a function to cancel merge requests. This is a great option if we find a problem in the project or need to roll back some changes. Use of this feature requires careful evaluation to ensure any potential risks and impacts are minimized.

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