# Copyright Spack Project Developers. See COPYRIGHT file for details.
#
# SPDX-License-Identifier: (Apache-2.0 OR MIT)
import llnl.util.lang
from .darwin import Darwin
from .freebsd import FreeBSD
from .linux import Linux
from .test import Test
from .windows import Windows
#: List of all the platform classes known to Spack
platforms = [Darwin, Linux, Windows, FreeBSD, Test]
@llnl.util.lang.memoized
def _host():
"""Detect and return the platform for this machine or None if detection fails."""
for platform_cls in sorted(platforms, key=lambda plt: plt.priority):
if platform_cls.detect():
return platform_cls()
return None
[docs]
def reset():
"""The result of the host search is memoized. In case it needs to be recomputed
we must clear the cache, which is what this function does.
"""
_host.cache.clear()
@llnl.util.lang.memoized
def cls_by_name(name):
"""Return a platform class that corresponds to the given name or None
if there is no match.
Args:
name (str): name of the platform
"""
for platform_cls in sorted(platforms, key=lambda plt: plt.priority):
if name.replace("_", "").lower() == platform_cls.__name__.lower():
return platform_cls
return None
[docs]
def by_name(name):
"""Return a platform object that corresponds to the given name or None
if there is no match.
Args:
name (str): name of the platform
"""
platform_cls = cls_by_name(name)
return platform_cls() if platform_cls else None