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What is a Pull Request?

PR stands for "Pull Request," which means "a request to pull." It is a collaborative way of submitting code changes, widely used in team development and open-source projects. Through PRs, developers can submit their completed code modifications to the maintainers of the code repository, requesting that these changes be merged into the target branch.

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The process of a PR is like a friendly collaboration invitation: After completing some features or fixes on their own branch, developers use PRs to showcase these changes to the original project's maintainers and provide explanations for the reasons and content of the changes, inviting them to review the code. If they find the changes valuable, they can choose to merge them.

Why Use PRs?​

Whether in team projects or open-source communities, PRs are an efficient collaboration tool. They not only make code reviews more transparent and standardized but also promote communication and learning among developers. By submitting and handling PRs, we are not just improving the project; we are building an open and inclusive development environment!

  1. Code Review: PRs provide a platform for the development team to review changes, ensuring the quality and consistency of the code. The review process helps identify potential errors, defects, or issues that do not meet project standards.

  2. Team Collaboration: Through PRs, team members can collaborate more easily, staying informed about each other's progress. This transparency helps coordinate work, avoid duplicate efforts, and resolve potential conflicts.

  3. Version Control: PRs offer an effective management method for version control. Before merging code, developers can discuss in PRs, review historical commits, and ensure that the merged changes are necessary and correct.

  4. Documentation: Each PR serves as a record of project changes, including why changes were needed and how they were implemented. This is very helpful for subsequent maintenance and guiding new team members.

What Happens After Submission?​

  1. Review Process: Once a PR is submitted, project maintainers and other team members will be notified and can view and review the code. Comments or requests for changes can be added on the PR page.

  2. Continuous Integration: If CI/CD tools are set up, PR submissions trigger automatic tests to ensure that code changes do not cause problems.

  3. Merge: When all reviews are approved and tests pass successfully, the maintainer will merge the PR, meaning your code changes will be integrated into the main branch.

  4. Close PR: Once a PR is merged or no longer needed, it can be closed, preserving the discussion records and change history.

Summary​

PRs are essential tools for team collaboration and code review. By using them, we can ensure that every code change undergoes review, testing, and discussion, thereby enhancing code quality and project stability. Throughout the development process, using PRs effectively not only helps team members stay synchronized but also improves the efficiency of code management. We hope this document helps you better understand and use the PR process.