deply 0.1.0

A tool to enforce architectural patterns in python projects

Deply

Deply is a standalone Python tool for enforcing architectural patterns and dependencies in large python projects. By analyzing code structure and dependencies, this tool ensures that architectural rules are followed, promoting cleaner, more maintainable, and modular codebases.

Inspired by https://github.com/qossmic/deptrac

Features

• Layer-Based Analysis: Define project layers and restrict their dependencies to enforce modularity.
• Dynamic Layer Configuration: Easily configure collectors for each layer using file patterns and class inheritance.
• Cross-Layer Dependency Rules (TODO): Specify rules to disallow certain layers from accessing others.
• Extensible and Configurable: Customize layers and rules for any python project setup.

Installation

To install Deply, use pip:

pip install deply

Configuration

Before running the tool, create a configuration file (config.yaml or similar) that specifies the rules and target files to enforce.

Example Configuration (config.example.yaml)

layers:
  - name: models
    collectors:
      - type: class_inherits
        base_class: "django.db.models.Model"

  - name: services
    collectors:
      - type: file_regex
        regex: "^.*/providers.py$"

  - name: views
    collectors:
      - type: file_regex
        regex: ".*/views_api.py"

ruleset:
  views:
    disallow:
      - models  # Disallows direct access to models in views

Usage

Run the tool from the command line by specifying the project root directory and configuration file:

python deply.py --project_root='/path/to/your_project' --config=config.example.yaml

Arguments

• --project_root: The path to the root of the project where apps are located.
• --config: Path to the configuration file that defines the rules and target files.

Sample Output

If violations are found, the tool will output a summary of architectural violations grouped by app, along with details of each violation, such as the file, line number, and violation message.

/path/to/your_project/your_project/app1/views_api.py:74 - Layer 'views' is not allowed to depend on layer 'models'

Running Tests

To test the tool, use unittest:

python -m unittest discover tests

License

See the LICENSE file for details.