How to use GitLab to implement branch merge requests

As the size of software development teams continues to expand and the number of codes continues to increase, git branch management becomes more and more important. In the case of collaborative development by multiple people, merge requests are the key to managing branches. This article will introduce readers to how to use GitLab to implement branch merge requests to improve collaboration efficiency and code quality.

1. Overview of GitLab branch management

GitLab is a web-based Git source code hosting, code review and continuous integration/deployment platform. GitLab has powerful branch management capabilities that allow developers to easily manage branches in Git repositories.

In GitLab, each branch has a unique name (such as master or develop) and can be created and deleted at any time. Each branch can have its own code commits, but code commits must follow a specific format to enable code review and branch merge requests in GitLab.

When developers feel that their code is ready to be merged with the main branch, they can create a branch merge request in GitLab and request other team members to review and approve the code merge request to ensure code quality and stability.

2. Creation of GitLab branch merge request

To create a branch merge request in GitLab, you need to follow the following steps:

1. In the GitLab interface, Select the branch you want to merge (usually a development branch) and go to that branch's repository.
2. Click the "New merge request" button.
3. Select the branch you want to merge (usually a development branch) in the "Source branch" drop-down menu.
4. Select the target branch to merge to (usually the master branch) in the "Target branch" drop-down menu.
5. Click the "Compare branches and continue" button.
6. Enter a title and description for the request.
7. Select the reviewer in the "Assignee" drop-down menu.
8. Click the "Submit merge request" button.

In this way, the creation of the GitLab branch merge request is completed. Next, the reviewer will receive the relevant notification message and review and approve it.

3. Review and approval of GitLab branch merge requests

When the merge request is created, the reviewer needs to conduct the following review of the code:

1. Code quality: Reviewers should read the code carefully and ensure that the code is of good quality and has no vulnerabilities or security issues.
2. Coding style: Reviewers should ensure that the coding style is consistent and follows the company or team's coding standards.
3. Functionality: The reviewer should ensure that the code implements the functionality described by the developer and has no additional errors or defects.

If the code review passes, the reviewer can approve the merge request and merge the code into the target branch. If the code review fails, please go back to the code development stage for modification and testing.

4. Conflict resolution of GitLab branch merge requests

Sometimes, GitLab branch merge requests may be rejected due to code conflicts and other reasons. In this case, the developer needs to resolve the conflict and resubmit the request.

There are two ways to resolve code conflicts:

1. Merge conflicts. This means developers need to manually merge conflicts in the code and recreate branch merge requests.

2. Undo the original code changes. This means that the developer must close the original merge request and retract their changes to their local repository, then make changes to the conflicts and resubmit the merge request.

Regardless of which method is used to resolve the conflict, developers need to resubmit the branch merge request in GitLab.

5. Summary

GitLab branch merge request is the key to managing branches. By using GitLab branch merge requests, team members can collaborate better, ensure code quality and stability, and reduce errors or conflicts during the code merge process. In a multi-person collaborative development environment, GitLab's branch merge request is a very useful feature that can improve team collaboration efficiency and achieve better progress and quality in project development.

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