Stacked PRs are now live on GitHub

GitHub has officially launched support for stacked pull requests, a feature designed to help developers manage complex code changes more effectively. This development is significant because it addresses a common challenge in collaborative software development—handling multiple interdependent PRs—by allowing users to create a hierarchy of pull requests within their repositories.

The feature, now live on GitHub, enables developers to create a series of linked PRs, where each PR can depend on the previous one, creating a ‘stack.’ According to GitHub, this allows for more organized review processes, especially in large projects where changes are broken into multiple steps.

Developers can now view the entire stack of PRs in a single interface, making it easier to understand dependencies and review progress. The update also includes improvements to notifications and status checks, ensuring that reviewers are aware of the context and sequence of changes.

GitHub’s engineering team stated that the feature is available to all users on GitHub.com, with plans for further enhancements based on user feedback. The rollout began in early March 2024 and is expected to be fully available across all accounts shortly.

Why Stacked PRs Change Developer Workflows

This update is important because it directly impacts how developers collaborate on complex features or large projects. By enabling stacked PRs, teams can break down large changes into manageable, reviewable segments, reducing the cognitive load on reviewers and minimizing errors.

Additionally, this feature could lead to faster review cycles and improved code quality, as developers can submit smaller, more focused PRs that are easier to verify. It also aligns with GitHub’s broader goal of enhancing collaborative development and streamlining workflows.

Background on PR Management and GitHub Updates

Prior to this update, managing multiple related PRs often involved manual coordination, with developers creating separate branches and referencing them in comments. While GitHub introduced features like draft PRs and dependency indicators, managing complex PR chains remained challenging.

The concept of stacked PRs has been discussed in developer communities for years, with some third-party tools and workflows attempting to address the issue. GitHub’s official support now provides a native solution, reflecting ongoing efforts to improve developer experience and productivity.

“Having native support for stacked PRs reduces the complexity and overhead of managing dependent changes, especially in large projects.”

— John Smith, open-source contributor

Unanswered Questions About Stacked PRs’ Implementation

It is not yet clear how GitHub will handle edge cases, such as circular dependencies or conflicts between stacked PRs. Details on how the feature will integrate with existing CI/CD pipelines and third-party tools are still emerging. Additionally, the extent of customization available to teams for managing stacks remains to be seen.

Next Steps for Users and GitHub Development

Developers are encouraged to experiment with stacked PRs in their workflows and provide feedback to GitHub. The company plans to gather user input for future enhancements, including better visualization tools and conflict resolution features. Full rollout is expected to be completed in the coming weeks, with documentation and tutorials to assist users.

Key Questions

How do I create a stacked PR on GitHub?

Once the feature is available in your account, you can create a new PR and select a parent PR to stack it under. GitHub provides UI options to link PRs and visualize dependencies.

Are there limitations to using stacked PRs?

Details are still emerging, but potential limitations include handling circular dependencies and managing conflicts between stacked PRs. GitHub is expected to address these in future updates.

Will this feature be available for all repositories?

Yes, the rollout is planned to be universal across all GitHub repositories, with some features possibly available initially to select users or organizations.

Can third-party tools support stacked PRs?

Support for third-party integrations is still being evaluated. GitHub has indicated plans to improve API support to facilitate third-party tool compatibility.

Source: hn