Trunk-Based Development vs GitFlow

You've just joined a new team, and the first thing you see in their repository is a branching model that looks like a spiderweb. Feature branches sprout from develop, hotfix branches from main, release branches from develop, and you're not sure which one you should be working on. Sound familiar?

This is the GitFlow branching model, one of the most popular strategies in the industry. But it's not the only option. Trunk-Based Development has gained significant traction in recent years, especially among teams using continuous integration and continuous deployment (CI/CD).

Let's break down the differences between these two approaches and help you decide which one fits your team's workflow.

Understanding Branching Models

Before diving into the comparison, it's important to understand what a branching model actually is. A branching model is a set of rules and conventions that define how developers create, merge, and manage branches in a version control system. These rules help teams coordinate work, maintain code quality, and deploy software reliably.

The core idea is simple: branches allow developers to work on features in isolation without disrupting the main codebase. But the question is: how many branches should you have, and how should they be managed?

GitFlow: The Classic Approach

GitFlow, introduced by Vincent Driessen in 2010, is a strict branching model with five main branches:

• main: Production-ready code
• develop: Integration branch for features
• feature/: Short-lived branches for individual features
• release/: Branches for preparing releases
• hotfix/: Emergency branches for fixing production issues

How GitFlow Works

When a developer wants to work on a new feature, they create a branch from develop:

git checkout develop
git checkout -b feature/user-authentication

They work on this branch, commit changes, and when the feature is complete, they merge it back into develop:

git checkout develop
git merge feature/user-authentication

The release process is more involved. When you're ready to prepare a release, you create a release branch from develop:

git checkout develop
git checkout -b release/v1.0.0

You fix bugs and finalize the release on this branch, then merge it into both main and develop:

git checkout main
git merge release/v1.0.0
git checkout develop
git merge release/v1.0.0

Hotfixes are created directly from main and merged back into both main and develop:

git checkout main
git checkout -b hotfix/critical-security-patch
# Fix the issue
git checkout main
git merge hotfix/critical-security-patch
git checkout develop
git merge hotfix/critical-security-patch

GitFlow Pros

GitFlow provides clear separation between different types of work. The release and hotfix branches ensure that production releases are carefully managed and that critical fixes can be deployed immediately without waiting for the next release cycle.

The model also enforces a disciplined workflow. Every change goes through a defined process, which can help maintain code quality and reduce the risk of introducing bugs into production.

GitFlow Cons

The main drawback of GitFlow is its complexity. With five branches and multiple merge points, it can be overwhelming for new team members. The model also encourages long-lived feature branches, which can lead to merge conflicts and delayed integration.

Another issue is that GitFlow assumes a release schedule. If your team deploys frequently (multiple times per day), the release and develop branches become unnecessary overhead.

Trunk-Based Development: The Modern Approach

Trunk-Based Development, popularized by Google and GitLab, takes a different approach. Instead of multiple long-lived branches, developers work directly on the main branch (often called "trunk" or "main").

How Trunk-Based Development Works

In Trunk-Based Development, every commit is expected to be deployable. Developers create short-lived feature branches, make small, focused changes, and merge them back to the main branch frequently:

git checkout main
git checkout -b feature/user-authentication
# Make small commits
git commit -m "Add user registration endpoint"
git commit -m "Add login validation"
git commit -m "Add password reset flow"
# Merge back to main
git checkout main
git merge feature/user-authentication

The key principle is that each commit should be a complete, working feature. This is often achieved through practices like:

• Atomic commits: Each commit represents a single logical change
• Feature toggles: Temporarily hiding incomplete features behind flags
• Continuous integration: Running tests on every commit

Trunk-Based Development Pros

Trunk-Based Development is much simpler than GitFlow. With only one main branch, there's less cognitive overhead and fewer opportunities for merge conflicts. The frequent integration also means bugs are caught early, when they're easier to fix.

The model is also highly compatible with CI/CD. Since every commit is deployable, you can automate deployments to production after every merge, enabling continuous delivery.

Trunk-Based Development Cons

The main challenge of Trunk-Based Development is the discipline it requires. Making every commit deployable means developers need to write better code and test more thoroughly. It also requires good practices like feature toggles and atomic commits.

For teams that are used to GitFlow, the transition can be difficult. The lack of release and hotfix branches means you need to be more careful about what you merge to main.

Comparison Table

When to Use GitFlow

GitFlow is a good fit for teams that:

• Have a fixed release schedule (e.g., monthly releases)
• Need to maintain multiple versions of their software simultaneously
• Have a large team with many developers working in parallel
• Are not yet comfortable with continuous deployment

If your team deploys to production once a month and needs to maintain stable releases for customers, GitFlow provides the structure you need.

When to Use Trunk-Based Development

Trunk-Based Development is ideal for teams that:

• Deploy to production frequently (multiple times per day)
• Have a small to medium-sized team
• Want to reduce merge conflicts and integration overhead
• Are committed to continuous integration and continuous deployment

If your team values speed and agility, and you're already using CI/CD pipelines, Trunk-Based Development will likely serve you better.

Making the Transition

If your team is currently using GitFlow and wants to switch to Trunk-Based Development, here are some steps to consider:

1. Start with feature toggles: Implement feature toggles to allow incomplete features to be merged to main without being visible to users.

2. Reduce branch lifetimes: Encourage developers to merge their feature branches back to main more frequently, even if the feature isn't complete.

3. Improve testing: Increase test coverage and run tests on every commit to ensure code quality.

4. Automate deployments: Set up CI/CD pipelines that deploy to staging or production after every merge to main.

5. Educate the team: Make sure everyone understands the principles of Trunk-Based Development and why the change is being made.

Conclusion

Both GitFlow and Trunk-Based Development have their place. GitFlow provides structure and discipline, while Trunk-Based Development offers simplicity and speed. The right choice depends on your team's workflow, release cadence, and comfort with continuous deployment.

If you're just starting out, Trunk-Based Development is often easier to learn and more aligned with modern DevOps practices. But if you have a large team with complex release requirements, GitFlow might be worth considering.

The most important thing is to choose a branching model that works for your team and stick with it consistently. The best branching model is the one your team actually uses and understands.

Next Step: If you're interested in implementing GitOps for your CI/CD pipeline, check out our guide on GitOps principles.