Understanding Version Control Packaging
The question of whether to rebase or merge remains a central debate in version control and software packaging circles. While various workflows have been proposed, there is often a lack of rigorous analysis regarding the specific advantages of each methodology. At its core, packaging software for distribution involves managing a mainline upstream source alongside independent lines of development, such as bug fixes or feature additions, all while maintaining a coherent, debuggable tree for final package builds.
Managing these asynchronous development streams requires a clear strategy. The decision to rebase or merge often depends on the specific needs of your stakeholders. For instance, upstream developers typically prefer clean, rebased patch series that apply easily to their latest code. Conversely, downstream developers who rely on your branches for their own work find rebasing disruptive, as it alters the history they depend on for merging. Understanding these competing interests is essential for any maintainer.
Best Practices for Git-Based Distribution
When determining your workflow, consider the hierarchy of your project. If you are the primary upstream, you have more flexibility to use rebased branches, as you define the history. However, if you are working in a collaborative environment or have downstream users, rebasing published branches becomes problematic. A distributed version control system like Git is designed to allow multiple access points; rebasing can break the ability for others to track and merge your changes effectively.
Beyond stakeholder management, consider the activity level of your independent development lines. If a patch series is large or requires frequent functional testing, the overhead of constant rebasing may outweigh the benefits. In some scenarios, simply maintaining an independent branch without merging or rebasing can be a viable strategy, provided it is managed with clear documentation. Ultimately, the goal is to create a reliable, integrated source tree that serves the needs of the distribution and its end users without introducing unnecessary complexity into the development history.