What makes a good merge request (pull request)?

When it comes to managing code merges, creating a healthy pull request (PR) is essential for smooth collaboration and efficient development. But what exactly constitutes a healthy PR? Let's delve into some key factors that contribute to a well-crafted pull request:

1. Clear Title and Description

One of the fundamental aspects of a healthy PR is a clear and descriptive title and description. This serves as a guide for reviewers to understand the purpose and scope of the changes being proposed. A good title should succinctly summarize the changes, while the description should provide context on why these changes are necessary and how they address the problem at hand.

By explaining what you are doing and why, you enable reviewers to grasp the intent behind the code modifications. This clarity not only facilitates smoother review processes but also aids in knowledge sharing within the team.

2. Keep it Small

**Less is more** when it comes to pull requests. Aim to keep your PRs as small as possible, focusing on minimal changes that address specific issues. Breaking down complex problems into smaller sub-tasks not only makes the codebase more manageable but also enhances the review process.

Struggling to divide a task into smaller PRs might indicate a need for further planning and collaboration with your team or product decision-makers. Remember, smaller PRs are easier to comprehend, review, and troubleshoot. Studies have shown that code review quality tends to decline as PR size increases, highlighting the importance of brevity and focus.

3. Adhere to the Single Responsibility Principle (SRP)

Following the Single Responsibility Principle (SRP) is crucial for maintaining clean and modular code. Each pull request should encapsulate only one unit of work, avoiding the coupling of unrelated changes. This practice not only enhances code modularity but also simplifies the rollback process in case of issues.

When changes are grouped together indiscriminately, it introduces unnecessary complexity and makes it harder for reviewers to identify and assess the impact of each modification. By adhering to SRP, you ensure that your PRs are focused, cohesive, and easier to review.

What Makes a Healthy Pull Request to You?

These are just a few principles to consider when crafting a healthy pull request, but the definition of a "healthy" PR can vary depending on the context and preferences of your team. What are your thoughts? Do you agree or disagree with these guidelines? Share your insights and experiences!

For further reading on effective pull request practices, check out this article.