42 lines
1.6 KiB
Python
42 lines
1.6 KiB
Python
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# -*- coding: utf-8 -*-
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# GNU Guix --- Functional package management for GNU
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# Copyright © 2021 Maxim Cournoyer <maxim.cournoyer@gmail.com>
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#
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# This file is part of GNU Guix.
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#
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# GNU Guix is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or (at
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# your option) any later version.
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#
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# GNU Guix is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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import os
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import sys
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python_root = os.path.realpath(sys.executable).split('/bin/')[0]
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major_minor = '{}.{}'.format(sys.version_info[0], sys.version_info[1])
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site_packages_prefix = 'lib/python' + major_minor + '/site-packages'
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python_site = python_root + '/' + site_packages_prefix
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try:
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all_sites_raw = os.environ['GUIX_PYTHONPATH'].split(':')
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except KeyError:
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all_sites_raw = []
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# Normalize paths, otherwise a trailing slash would cause it to not match.
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all_sites_norm = [os.path.normpath(p) for p in all_sites_raw]
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matching_sites = [p for p in all_sites_norm
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if p.endswith(site_packages_prefix)]
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# Insert sites matching the current version into sys.path, right before
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# Python's own site.
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sys_path_absolute = [os.path.realpath(p) for p in sys.path]
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index = sys_path_absolute.index(python_site)
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sys.path = sys.path[:index] + matching_sites + sys.path[index:]
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