Automated GitLab Merge Request Code Review with AI
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This n8n workflow automates code reviews for GitLab merge requests. It uses a webhook to trigger, fetches changes, and then employs an AI model to provide feedback and post discussions directly on the merge request.
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About This Workflow
Overview
This n8n workflow is designed to automate the code review process for GitLab merge requests. When a merge request is updated, a webhook triggers the workflow. It then fetches the specific changes made in the merge request. The core of the automation involves using an AI model (like OpenAI) to analyze the code diff, generate review comments with scores, and post these comments as discussions on the GitLab merge request. This significantly speeds up the review process and ensures consistent feedback.
Key Features
- GitLab Webhook Integration: Automatically triggers the workflow on merge request updates.
- Code Diff Analysis: Fetches and parses the code differences between branches.
- AI-Powered Review: Utilizes an AI model to analyze code changes and provide feedback.
- Automated Discussion Posting: Posts review comments and suggestions directly to the GitLab merge request.
- Customizable Review Criteria: The AI prompt can be adjusted to define the review style and scoring.
How To Use
- Set up GitLab Webhook: Configure a webhook in your GitLab project to point to the n8n webhook node URL, triggering on merge request events.
- Configure HTTP Request Nodes: Replace placeholder GitLab URLs and
PRIVATE-TOKENheaders in theGet Changes1andPost Discussions1nodes with your actual GitLab API endpoint and authentication token. - Configure AI Node: Set up the
OpenAI Chat Model1(or your preferred AI model) and theBasic LLM Chain1node, adjusting the prompt to define the desired review style and criteria. - Customize Trigger Words: Modify the
Need Review1node if you want to trigger reviews based on specific keywords or conditions in the merge request notes. - Deploy and Test: Activate the workflow and test by creating or updating a merge request in your GitLab project.
Apps Used
Workflow JSON
{
"id": "4736d047-3f55-44eb-a67e-c5eb09d3b3f1",
"name": "Automated GitLab Merge Request Code Review with AI",
"nodes": 0,
"category": "GitLab Integrations",
"status": "active",
"version": "1.0.0"
}Note: This is a sample preview. The full workflow JSON contains node configurations, credentials placeholders, and execution logic.
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ID: 4736d047-3f55...
About the Author
DevOps_Master_X
Infrastructure Expert
Specializing in CI/CD pipelines, Docker, and Kubernetes automations.
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