LEANN/docs/CONTRIBUTING.md

🤝 Contributing

We welcome contributions! Leann is built by the community, for the community.

Ways to Contribute

• 🐛 Bug Reports: Found an issue? Let us know!
• 💡 Feature Requests: Have an idea? We'd love to hear it!
• 🔧 Code Contributions: PRs welcome for all skill levels
• 📖 Documentation: Help make Leann more accessible
• 🧪 Benchmarks: Share your performance results

🚀 Development Setup

Prerequisites

1. Install uv (fast Python package installer):

   curl -LsSf https://astral.sh/uv/install.sh | sh
   

2. Clone the repository:

   git clone https://github.com/LEANN-RAG/LEANN-RAG.git
   cd LEANN-RAG
   

3. Install system dependencies:

   macOS:

   brew install llvm libomp boost protobuf zeromq pkgconf
   

   Ubuntu/Debian:

   sudo apt-get install libomp-dev libboost-all-dev protobuf-compiler \
                        libabsl-dev libmkl-full-dev libaio-dev libzmq3-dev
   

4. Build from source:

   # macOS
   CC=$(brew --prefix llvm)/bin/clang CXX=$(brew --prefix llvm)/bin/clang++ uv sync
   
   # Ubuntu/Debian
   uv sync
   

🔨 Pre-commit Hooks

We use pre-commit hooks to ensure code quality and consistency. This runs automatically before each commit.

Setup Pre-commit

1. Install pre-commit tools:

   uv sync lint
   

2. Install the git hooks:

   pre-commit install
   

3. Run pre-commit manually (optional):

   uv run pre-commit run --all-files
   

Pre-commit Checks

Our pre-commit configuration includes:

• Trailing whitespace removal
• End-of-file fixing
• YAML validation
• Large file prevention
• Merge conflict detection
• Debug statement detection
• Code formatting with ruff
• Code linting with ruff

🧪 Testing

Running Tests

# Install test tools only (no project runtime)
uv sync --group test

# Run all tests
uv run pytest

# Run specific test file
uv run pytest test/test_filename.py

# Run with coverage
uv run pytest --cov=leann

Writing Tests

• Place tests in the test/ directory
• Follow the naming convention test_*.py
• Use descriptive test names that explain what's being tested
• Include both positive and negative test cases

📝 Code Style

We use ruff for both linting and formatting to ensure consistent code style.

Format Your Code

# Format all files
ruff format

# Check formatting without changing files
ruff format --check

Lint Your Code

# Run linter with auto-fix
ruff check --fix

# Just check without fixing
ruff check

Style Guidelines

• Follow PEP 8 conventions
• Use descriptive variable names
• Add type hints where appropriate
• Write docstrings for all public functions and classes
• Keep functions focused and single-purpose

🚦 CI/CD

Our CI pipeline runs automatically on all pull requests. It includes:

1. Linting and Formatting: Ensures code follows our style guidelines
2. Multi-platform builds: Tests on Ubuntu and macOS
3. Python version matrix: Tests on Python 3.9-3.13
4. Wheel building: Ensures packages can be built and distributed

CI Commands

The CI uses the same commands as pre-commit to ensure consistency:

# Linting
ruff check .

# Format checking
ruff format --check .

Make sure your code passes these checks locally before pushing!

🔄 Pull Request Process

1. Fork the repository and create your branch from main:

   git checkout -b feature/your-feature-name
   

2. Make your changes:

   • Write clean, documented code
   • Add tests for new functionality
   • Update documentation as needed

3. Run pre-commit checks:

   pre-commit run --all-files
   

4. Test your changes:

   uv run pytest
   

5. Commit with descriptive messages:

   git commit -m "feat: add new search algorithm"
   

   Follow Conventional Commits:

   • feat: for new features
   • fix: for bug fixes
   • docs: for documentation changes
   • test: for test additions/changes
   • refactor: for code refactoring
   • perf: for performance improvements

6. Push and create a pull request:

   • Provide a clear description of your changes
   • Reference any related issues
   • Include examples or screenshots if applicable

📚 Documentation

When adding new features or making significant changes:

1. Update relevant documentation in /docs
2. Add docstrings to new functions/classes
3. Update README.md if needed
4. Include usage examples

🤔 Getting Help

• Discord: Join our community for discussions
• Issues: Check existing issues or create a new one
• Discussions: For general questions and ideas

📄 License

By contributing, you agree that your contributions will be licensed under the same license as the project (MIT).

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Thank you for contributing to LEANN! Every contribution, no matter how small, helps make the project better for everyone. 🌟