In recent times, trunk based development has become increasingly relevant in various contexts. Trunk Based Development. This site attempts to collect all the related facts, rationale and techniques for Trunk-Based Development together in one place, complete with twenty-five diagrams to help explain things. Five-minute overview - Trunk-Based Development.
When we say ‘the trunk’ on this site, it is just a branch in a single repository that developers in a team are focusing on for development. It may be called ‘main’. From another angle, that hints at the fact that the branch in question may literally not be called ‘trunk’ at all. Branch for release - Trunk-Based Development. “So at Google we do what’s called Trunk-Based Development. Furthermore, i should note that it is the combination of Trunk-Based Development with a centralized repository that really defines the monolithic model of source code management.
Deciding factors - Trunk Based Development. In order to manage database schemas in a Trunk-Based Development way you will need to find a way to handle table-shape changes under source control, and even manage existing data where new/changed columns have happened. Trunk-Based Development - 主干开发. Release from trunk Continuous Integration (CI) Committing straight to the trunk Short Lived Feature Branches Continuous Code Review Continuous Delivery (CD) Concurrent development of consecutive releases Application strangulation Observed habits You're doing it wrong Alternative branching models Monorepos Expanding Contracting Monorepos Game ...
Continuous Integration (CI) - Trunk-Based Development. Given other popular branching models (that are not Trunk-Based Development) also benefit from CI servers watching for and verifying commits, this site is going to refer to the commit to a *enforced single shared source-control branch practice as Trunk-Based Development. Additionally, styles and Trade-offs - Trunk-Based Development.
There are broadly three styles of trunk-based development as a daily developer activity. Depending on the number of developers in the team, the release cadence, and the desired rate of commits (assuming story-sizes that support that), you have trade-offs for each of the three: Feature flags - Trunk-Based Development.
Flags get put into codebases over time and often get forgotten as development teams pivot towards new business deliverables. Of course, you want to wait a while until it is certain that you are fixed on a toggle state, and that’s where the problem lies - the application works just fine with the toggle left in place, and the business only ... Similarly, monorepos - Trunk Based Development. A Monorepo is a specific Trunk-Based Development implementation where the organization in question puts its source for all applications/services/libraries/frameworks into one trunk and forces developers to commit together in that trunk - atomically. Branch by Abstraction - Trunk-Based Development.
Branch by Abstraction is a set-piece technique to effect a ‘longer to complete’ change in the trunk. Say a developer (or a pair of developers), has a change that is going to take five days to complete.
📝 Summary
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