Add checker for unused and undeclared dependencies

Author: nifadyev

{{cookiecutter.project_name}}/.pre-commit-config.yaml

@@ -30,3 +30,8 @@ repos:
         entry: ruff check app
         language: python
         types: [python]
+      - id: unused_undeclared_deps
+        name: unused_undeclared_deps
+        entry: deptry backend
+        language: python
+        types: [python]

{{cookiecutter.project_name}}/Makefile

@@ -84,6 +84,7 @@ lint:
 	make check
 	@# For some reason, mypy and pylint fails to resolve PYTHONPATH, set manually.
 	PYTHONPATH=./app $(MANAGER) run pylint app
+	$(MANAGER) run deptry backend
 	PYTHONPATH=./app $(MANAGER) run mypy --namespace-packages --show-error-codes app --check-untyped-defs --ignore-missing-imports --show-traceback
 
 

{{cookiecutter.project_name}}/pyproject.toml

@@ -44,6 +44,7 @@ pylint-django = "^2.5.4"
 pytest-randomly = "^3.15.0"
 faker = "^28.4.1"
 factory-boy = "^3.3.1"
+deptry = "0.21.1"
 
 {%- if cookiecutter.linter == 'Flake8' %}