Automate execution of static code analysis with pre-commit hooks

This section demonstrates how static code analysis is automatically executed before each commit using pre-commit, Ruff, and Mypy.

1. Installation of pre-commit

Pre-commit is installed as a development dependency:

poetry add -D pre-commit

then the Git hook is activated:

poetry run pre-commit install

This creates the file .git/hooks/pre-commit which runs automatically at each commit.

The configuration is located at the root of the repository in: .pre-commit-config.yaml Link : https://github.com/aymaneVXx/todo-cli/blob/main/.pre-commit-config.yaml

repo: local → uses the tools already installed via Poetry
ruff hook → runs static linting
mypy hook → runs type checking
pass_filenames: false → ensures pre-commit does not append filenames (avoids Mypy duplicate module errors)

Manually on all files:

poetry run pre-commit run --all-files

Automatically before every commit:

git commit -m "Your message"

If Ruff or Mypy find issues, the commit is blocked until the issues are fixed — this ensures code quality.