Make Makefiles nicer

Makefile

@@ -1,22 +1,27 @@
+POETRY ?= poetry
+PIP ?= pip3
+
+TESTS_DIR := tests
+
 .PHONY: install_lint_requirements
 install_lint_requirements:
-	poetry install --with lint
+	$(POETRY) install --with lint
 
 .PHONY: lint
 lint: install_lint_requirements
-	flake8 tests
-	black --check --diff tests
-	pylint tests
-	isort --check-only tests
-	mypy tests
+	flake8 $(TESTS_DIR)
+	black --check --diff $(TESTS_DIR)
+	pylint $(TESTS_DIR)
+	isort --check-only $(TESTS_DIR)
+	mypy $(TESTS_DIR)
 
 .PHONY: install_test_requirements
 install_test_requirements:
-	poetry install --with test
+	$(POETRY) install --with test
 
 .PHONY: test
 test: install_test_requirements
-	pytest tests
+	pytest $(TESTS_DIR)
 
 .PHONY: clean
 clean:
@@ -30,14 +35,14 @@ clean:
 
 .PHONY: format
 format:
-	black tests
-	isort tests
+	black $(TESTS_DIR)
+	isort $(TESTS_DIR)
 
 .PHONY: install
 install:
-	pip3 install .
+	$(PIP) install .
 
-TARGET_DIR := .
+TARGET_DIR ?= .
 
 .PHONY: generate
 generate: install

{{cookiecutter.package_name}}/Makefile

@@ -1,28 +1,32 @@
+POETRY ?= poetry
+
 PACKAGE_NAME := {{cookiecutter.package_name}}
+TESTS_DIR := tests
+ALL_SOURCE := $(PACKAGE_NAME) $(TESTS_DIR)
 
 .PHONY: install_lint_requirements
 install_lint_requirements:
-	poetry install --with lint
+	$(POETRY) install --with lint
 
 .PHONY: lint
 lint: install_lint_requirements
-	flake8 $(PACKAGE_NAME) tests
-	black --check --diff $(PACKAGE_NAME) tests
-	pylint $(PACKAGE_NAME) tests
-	isort --check-only $(PACKAGE_NAME) tests
-	mypy --ignore-missing-imports $(PACKAGE_NAME) tests
+	flake8 $(ALL_SOURCE)
+	black --check --diff $(ALL_SOURCE)
+	pylint $(ALL_SOURCE)
+	isort --check-only $(ALL_SOURCE)
+	mypy --ignore-missing-imports $(ALL_SOURCE)
 
 .PHONY: install_test_requirements
 install_test_requirements:
-	poetry install --with test
+	$(POETRY) install --with test
 
 .PHONY: test
 test: install_test_requirements
 	pytest \
 		--cov=$(PACKAGE_NAME) \
-		--cov=tests \
+		--cov=$(TESTS_DIR) \
 		--cov-report=term-missing:skip-covered \
-		tests
+		$(TESTS_DIR)
 
 .PHONY: clean
 clean:
@@ -38,9 +42,9 @@ clean:
 
 .PHONY: build
 build:
-	poetry build
+	$(POETRY) build
 
 .PHONY: format
 format:
-	black $(PACKAGE_NAME) tests
-	isort $(PACKAGE_NAME) tests
+	black $(ALL_SOURCE)
+	isort $(ALL_SOURCE)