SHELL = /bin/bash

REPOSITORY = https://github.com/PyCQA/flake8.git

check_env_vars:
ifdef OUTPUT_PATH
OUTPUT_PATH := ${OUTPUT_PATH}/flake8
else
	$(error OUTPUT_PATH is undefined)
endif

venv:
	python3 -m venv venv

repository:
	git clone ${REPOSITORY} repository

5.0.4 6.0.0 6.1.0: check_env_vars venv repository
	mkdir --parents "${OUTPUT_PATH}"
	source venv/bin/activate
	cd repository
	git checkout tags/$@
	pip install -r docs/source/requirements.txt
	pip install .
	sphinx-build -b dirhtml docs/source/ "${OUTPUT_PATH}/$@"

.ONESHELL:
.SUFFIXES:
.PHONY:
.DELETE_ON_ERROR: