build: safer make clean

taken from cookiecutter-pypackage

Makefile

@@ -17,7 +17,28 @@ dist: clean
 	$(SETUP) sdist
 	$(SETUP) bdist_wheel
 
-clean:
+clean: clean-build clean-pyc clean-test ## remove all build, test, coverage and Python artifacts
+
+clean-build: ## remove build artifacts
+	rm -fr build/
+	rm -fr dist/
+	rm -fr .eggs/
+	find . -name '*.egg-info' -exec rm -fr {} +
+	find . -name '*.egg' -exec rm -f {} +
+
+clean-pyc: ## remove Python file artifacts
+	find . -name '*.pyc' -exec rm -f {} +
+	find . -name '*.pyo' -exec rm -f {} +
+	find . -name '*~' -exec rm -f {} +
+	find . -name '__pycache__' -exec rm -fr {} +
+
+clean-test: ## remove test and coverage artifacts
+	rm -fr .tox/
+	rm -f .coverage
+	rm -fr htmlcov/
+	rm -fr .pytest_cache
+
+git-clean:
 	git clean -dfx -e $(EXCLUDES)
 
 style:
@@ -30,4 +51,4 @@ stylecheck:
 	isort --diff --check-only --recursive $(STYLE_TARGETS) --skip-glob "*/$(EXCLUDE_TARGETS)/*"
 	flake8
 
-.PHONY: all build install clean style stylecheck
+.PHONY: all build install clean style stylecheck git-clean clean-build clean-pyc clean-test