Hexagonal Sanity Check

This project checks if the dependency flow between the layers of the Hexagonal architecture defined for this project was respected.

How to install

It can be easily installed via pip: pip install hexagonal-sanity-check

How to configure your project

First it's necessary to define your hexagonal layers and their order. The tool expects a default file name on your source folder dir with the name hexagonal_config.py.

1. First you create the Hexagonal Layers you have on your system via the class name HexagonalLayer. There are two arguments:

   • name: It can be any name, domain, frontend, infrastructure, or any name you used for your layers.
   • usecases: This is the name of the directory the files related to this layer as storage. It's not the full path, it's the directory name relative path from source.

2. Import hexagonal_config on your file, and define the order with + (add layers) then >>(set the sequence of the layers). The most to the left layers is the most outer layer, while the most to the right layer is the most inner layer.

Example, for this folder structure:

. src
├── __init__.py
├── hexagonal_config.py
├── domain
│   ├── __init__.py
│   ├── __pycache__
│   └── person.py
├── infrastructure
│   ├── __init__.py
│   └── person_mysql_repository.py
├── main.py
├── services
│   ├── __init__.py
│   └── person_repository.py
└── usecases
    ├── __init__.py
    └── create_person_usecase.py
.tests    

The file:

from hexagonal.domain.hexagonal_layer import HexagonalLayer
from hexagonal.hexagonal_config import hexagonal_config

hexagonal_config.add_inner_layer(HexagonalLayer(name='infrastructure', directories=['/infrastructure']))
hexagonal_config.add_inner_layer(HexagonalLayer(name='use_cases', directories=['/use_cases']))
hexagonal_config.add_inner_layer(HexagonalLayer(name='services', directories=['/services']))
hexagonal_config.add_inner_layer(HexagonalLayer(name='domain', directories=['/domain']))

hexagonal_config.excluded_dirs = ['/tests']

Generating the Project Diagram

This command generate a visual diagram show the composition of your hexagonal layers.

Pre requisites

To generate the Hexagonal Diagram of the project, it's necessary to have Graphviz installed in the machine.
For Mac you can brew install graphviz.
For other, check the documentation https://graphviz.org/download/.

CMD

hexagonal diagram --source_path ./

Checking Project's Hexagonal Integrity

This checks if the correct flow of the dependencies -from outer to inner layer- was respected.

CMD

hexagonal check --source_path ./