# Copyright 2021 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

import portage
from portage import os
from portage.const import GLOBAL_CONFIG_PATH

COMPAT_FEATURES = 'FEATURES="${FEATURES} -binpkg-multi-instance"'


def main():
	"""
	If the current installation is still has binpkg-multi-instance
	disabled, then patch make.globals inside ${ED} to maintain backward
	compatibility. This is intended to be called from the ebuild as
	follows:

	pkg_preinst() {
		python_setup
		env -u FEATURES -u PORTAGE_REPOSITORIES \
			PYTHONPATH="${D}$(python_get_sitedir)${PYTHONPATH:+:${PYTHONPATH}}" \
			"${PYTHON}" -m portage._compat_upgrade.binpkg_multi_instance || die
	}
	"""
	if 'binpkg-multi-instance' not in portage.settings.features:
		portage.output.EOutput().einfo('Setting make.globals default {} for backward compatibility'.format(COMPAT_FEATURES))
		config_path = os.path.join(os.environ['ED'], GLOBAL_CONFIG_PATH.lstrip(os.sep), 'make.globals')
		with open(config_path, 'at') as f:
			f.write("{}\n".format(COMPAT_FEATURES))


if __name__ == '__main__':
	main()