SHELL = /bin/bash

REPOSITORY = https://github.com/bedops/bedops.git

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

venv-3.6:
	export PYENV_VERSION=3.6
	python3 -m venv venv

repository:
	git clone ${REPOSITORY} repository

v2.4.41: check_env_vars venv-3.6 repository
	source venv/bin/activate
	cd repository
	git checkout tags/$@
	pip install -r docs/requirements.txt
	pip install sphinx
	cd docs
	make clean
	make html
	mkdir --parents "${OUTPUT_PATH}"
	cp --recursive _build/html "${OUTPUT_PATH}/$@"

# This build gives this error: sphinx.ext.mathjax: other math package is already loaded
# I don't know how to fix it, but it compiles if I remove (manually) sphinx.ext.pngmath from docs/conf.py
v2.3.0: check_env_vars venv-3.6 repository
	source venv/bin/activate
	cd repository
	git checkout tags/$@
	pip install "sphinx < 1.8"
	cd docs
	make clean
	make html
	mkdir --parents "${OUTPUT_PATH}"
	cp --recursive _build/html "${OUTPUT_PATH}/$@"

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