A Makefile for managing Python requirements in a sane way without extra Python tools.

Makefile

python ?= python3
pip := pip --disable-pip-version-check

export PATH := .env/bin:$(PATH)

#######################
# Python environments #
#######################

.env:
	$(python) -m venv .env

prod-env: requirements/prod.in
test-env: requirements/test.in | prod-env
prod-env test-env: | .env
	$(pip) install -r $<

.PHONY: prod-env test-env

#######################
# Python requirements #
#######################

requirements/prod.txt: requirements/prod.in | clean-env prod-env
requirements/test.txt: requirements/test.in | test-env
requirements/prod.txt requirements/test.txt:
	$(pip) freeze -r $@ > $@

#########
# Clean #
#########

clean-all: clean-env clean-python

clean-env:
	rm -rf .env

clean-python:
	find -name '__pycache__' -type d -prune | xargs rm -rf
	find -name '*.pyc' -type f -delete

.PHONY: clean-all clean-env clean-python