A Makefile to setup a Python 3 venv.

py3-venv-Flask.Makefile

VENV_INSTALL_DIR = venv

# The first target listed acts as the default.
install:
	@python3 -m venv ${VENV_INSTALL_DIR}
	@. ${VENV_INSTALL_DIR}/bin/activate && pip3 install Flask > /dev/null && python3 -c \
		"import subprocess; \
		import re; \
		flask_info = subprocess.run('pip3 show Flask', encoding='utf-8', shell=True, stdout=subprocess.PIPE).stdout; \
		flask_version = re.compile('Version: ([0-9]+.[0-9]+)').search(flask_info)[1]; \
		print('For Flask quickstart info visit: <http://flask.pocoo.org/docs/%s/quickstart/>.' % flask_version)"
	@echo "Enter \`. ${VENV_INSTALL_DIR}/bin/activate\` to activate your virtual environment" \
	      "and when done enter \`deactivate\` to deactivate your virtual environment."

clean:
	@rm -rf ${VENV_INSTALL_DIR} __pycache__

.PHONEY: install clean

py3-venv.Makefile

VENV_INSTALL_DIR = venv

# The first target listed acts as the default.
# @see https://stackoverflow.com/questions/2924697/how-does-one-output-bold-text-in-bash#answer-2924755
install:
	@python3 -m venv ${VENV_INSTALL_DIR}
	@echo "Enter \`$(tput bold). ${VENV_INSTALL_DIR}/bin/activate$(tput sgr0)\` to activate your virtual environment." \
	      "And when done enter \`$(tput bold)deactivate$(tput sgr0)\` to deactivate your virtual environment."

clean:
	@rm -rf ${VENV_INSTALL_DIR}

# @see http://blog.bottlepy.org/2012/07/16/virtualenv-and-makefiles.html
# venv: venv/bin/activate

# venv/bin/activate: requirements.txt
#	test -d venv || virtualenv venv
#	venv/bin/pip install -Ur requirements.txt
#	touch venv/bin/activate

.PHONEY: install clean