What is Gerrit Code Review Mcp

gerrit-code-review-mcp is an MCP server that integrates with the Gerrit code review system, enabling AI assistants to review code changes and their details through a user-friendly interface.

Use cases

Use cases include reviewing code changes for quality assurance, comparing different versions of code patches, and tracking the evolution of code modifications through various iterations.

How to use

To use gerrit-code-review-mcp, clone the repository, install the necessary dependencies, and utilize the provided functions to fetch change details or compare patchsets.

Key features

Key features include fetching complete change details, comparing differences between patchsets, viewing specific file changes, and providing comprehensive information about code modifications.

Where to use

gerrit-code-review-mcp is primarily used in software development environments where code review processes are essential, particularly in projects utilizing Gerrit for version control.

Gerrit Review MCP Server

This MCP server provides integration with Gerrit code review system, allowing AI assistants to review code changes and their details through a simple interface.

Features

The server provides a streamlined toolset for code review:

Fetch Change Details

fetch_gerrit_change(change_id: str, patchset_number: Optional[str] = None)

• Fetches complete change information including files and patch sets
• Shows detailed diff information for each modified file
• Displays file changes, insertions, and deletions
• Supports reviewing specific patch sets
• Returns comprehensive change details including:
  • Project and branch information
  • Author and reviewer details
  • Comments and review history
  • File modifications with diff content
  • Current patch set information

Compare Patchset Differences

fetch_patchset_diff(change_id: str, base_patchset: str, target_patchset: str, file_path: Optional[str] = None)

• Compare differences between two patchsets of a change
• View specific file differences or all changed files
• Analyze code modifications across patchset versions
• Track evolution of changes through review iterations

Example Usage

Review a complete change:

# Fetch latest patchset of change 23824
change = fetch_gerrit_change("23824")

Compare specific patchsets:

# Compare differences between patchsets 1 and 2 for change 23824
diff = fetch_patchset_diff("23824", "1", "2")

View specific file changes:

# Get diff for a specific file between patchsets
file_diff = fetch_patchset_diff("23824", "1", "2", "path/to/file.swift")

Prerequisites

• Python 3.10 or higher (Python 3.11 recommended)
• Gerrit HTTP access credentials
• HTTP password generated from Gerrit settings
• Access to the mcp[cli] package repository (private package)

Installation

Installing via Smithery

To install gerrit-code-review-mcp for Claude Desktop automatically via Smithery:

npx -y @smithery/cli install @cayirtepeomer/gerrit-code-review-mcp --client claude

Manual Installation

1. Clone this repository:

git clone <repository-url>
cd gerrit-review-mcp

2. Create and activate a virtual environment:

# For macOS/Linux:
python -m venv .venv
source .venv/bin/activate

# For Windows:
python -m venv .venv
.venv\Scripts\activate

3. Install this package in editable mode with its dependencies:

pip install -e .

Configuration

1. Set up environment variables:

export GERRIT_HOST="gerrit.example.com"  # Your Gerrit server hostname
export GERRIT_USER="your-username"       # Your Gerrit username
export GERRIT_HTTP_PASSWORD="your-http-password"  # Your Gerrit HTTP password

Or create a .env file:

GERRIT_HOST=gerrit.example.com
GERRIT_USER=your-username
GERRIT_HTTP_PASSWORD=your-http-password

2. Generate HTTP password:

• Log into your Gerrit web interface
• Go to Settings > HTTP Credentials
• Generate new password
• Copy the password to your environment or .env file

MCP Configuration

To use this MCP server with Cursor, you need to add its configuration to your ~/.cursor/mcp.json file. Here’s the required configuration:

{
  "mcpServers": {
    "gerrit-review-mcp": {
      "command": "/path/to/your/workspace/gerrit-code-review-mcp/.venv/bin/python",
      "args": [
        "/path/to/your/workspace/gerrit-code-review-mcp/server.py",
        "--transport",
        "stdio"
      ],
      "cwd": "/path/to/your/workspace/gerrit-code-review-mcp",
      "env": {
        "PYTHONPATH": "/path/to/your/workspace/gerrit-code-review-mcp",
        "VIRTUAL_ENV": "/path/to/your/workspace/gerrit-code-review-mcp/.venv",
        "PATH": "/path/to/your/workspace/gerrit-code-review-mcp/.venv/bin:/usr/local/bin:/usr/bin:/bin"
      },
      "stdio": true
    }
  }
}

Replace /path/to/your/workspace with your actual workspace path. For example, if your project is in /Users/username/projects/gerrit-code-review-mcp, use that path instead.

Make sure all paths in the configuration point to:

• Your virtual environment’s Python interpreter
• The project’s server.py file
• The correct working directory
• The virtual environment’s bin directory in the PATH

Implementation Details

The server uses Gerrit REST API to interact with Gerrit, providing:

• Fast and reliable change information retrieval
• Secure authentication using HTTP digest auth
• Support for various Gerrit REST endpoints
• Clean and maintainable codebase
• HTTPS encryption for secure communication

Troubleshooting

If you encounter connection issues:

1. Verify your HTTP password is correctly set
2. Check GERRIT_HOST setting
3. Ensure HTTPS access is enabled on Gerrit server
4. Test connection using curl:

   curl -u "username:http-password" https://your-gerrit-host/a/changes/
   

5. Verify Gerrit access permissions for your account

License

This project is licensed under the MIT License.

Contributing

We welcome contributions! Please:

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Submit a pull request