.PHONY: clean build_img

PYTHON_VERSION = 3.8
PYTHON_SUBVERSION = 3.8.12

PYENV_VERSIONS = $(HOME)/.pyenv/versions
PYTHON_BIN = $(PYENV_VERSIONS)/$(PYTHON_SUBVERSION)/bin/python$(PYTHON_VERSION)

VENV = venv
PYTHON_VENV = $(VENV)/bin/python
PIP = $(PYTHON_VENV) -m pip
PIP_COMPILE = venv/bin/pip-compile

IMG_NAME=etl_beam_env

all: oci_img .installed_deps

build_img: .img_name

.img_name: Dockerfile requirements.txt dev-requirements.txt
	docker build -t $(IMG_NAME) .
	echo $(IMG_NAME) > $@

.installed_deps: requirements.txt dev-requirements.txt $(PYTHON_VENV)
	$(PIP) install \
		-r requirements.txt \
		-r dev-requirements.txt
	touch $@

requirements.txt: pyproject.toml $(PIP_COMPILE)
	$(PIP_COMPILE) \
		--resolver=backtracking \
		--output-file $@ \
		$<

dev-requirements.txt: pyproject.toml $(PIP_COMPILE)
	$(PIP_COMPILE) \
		--extra=dev \
		--resolver=backtracking \
		--output-file $@ \
		$<

$(PIP_COMPILE): $(PYTHON_VENV)
	$(PIP) install pip-tools

$(PYTHON_VENV): $(PYTHON_BIN)
	virtualenv --python=$^ $(VENV)
	$(PIP) install --upgrade pip

$(PYTHON_BIN):
	pyenv install $(PYTHON_SUBVERSION)

clean:
	rm -rf *.egg-info venv installed_deps