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# Copyright 2022 Open Source Robotics Foundation, Inc.
# Licensed under the Apache License, Version 2.0
from pathlib import Path
import sysconfig
def get_python_install_path(name, vars_=()):
"""
Get Python install paths matching Colcon's preferred scheme.
See sysconfig.get_path for more info about the arguments.
:param name: Name of the path type
:param vars_: A dictionary of variables updating the values of
sysconfig.get_config_vars()
:rtype: Pathlib.Path
"""
kwargs = {}
kwargs['vars'] = dict(vars_)
install_base = kwargs['vars'].get('base', sysconfig.get_config_var('base'))
if install_base != sysconfig.get_config_var('base'):
# If we are not actually installing to /usr, the default path scheme
# may be inadequate. Check if we need to override.
schemes = sysconfig.get_scheme_names()
if 'deb_system' in schemes or 'osx_framework_library' in schemes:
# Avoid deb_system because it requires using --install-layout deb
# which ignores --prefix and hardcodes it to /usr
kwargs['scheme'] = 'posix_prefix'
elif 'rpm_prefix' in schemes:
# The presence of the rpm_prefix scheme indicates that posix_prefix
# has been patched to inject `local` into the installation
# locations. The rpm_prefix scheme is a backup of what posix_prefix
# was before it was patched.
kwargs['scheme'] = 'rpm_prefix'
return Path(sysconfig.get_path(name, **kwargs))
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