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#
# Copyright (C) 2020 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
"""Constants and helper functions for hosts."""
import enum
import sys
@enum.unique
class Host(enum.Enum):
"""Enumeration of supported hosts."""
Darwin = 'darwin'
Linux = 'linux'
Windows = 'windows'
Android = 'android'
@property
def is_windows(self) -> bool:
"""Returns True if the given host is Windows."""
return self == Host.Windows
@property
def is_darwin(self) -> bool:
"""Returns True if the given host is Darwin."""
return self == Host.Darwin
@property
def is_linux(self) -> bool:
"""Returns True if the given host is Linux."""
return self == Host.Linux
@property
def os_tag(self) -> str:
"""Returns the os tag of current Host."""
return {
Host.Darwin: 'darwin-x86',
Host.Linux: 'linux-x86',
Host.Windows: 'windows-x86',
}[self]
@enum.unique
class Arch(enum.Enum):
"""Enumeration of supported arches."""
ARM = 'arm'
AARCH64 = 'aarch64'
I386 = 'i386'
X86_64 = 'x86_64'
@property
def llvm_arch(self) -> str:
"""Converts to llvm arch."""
return {
Arch.ARM: 'arm',
Arch.AARCH64: 'aarch64',
Arch.I386: 'i686',
Arch.X86_64: 'x86_64',
}[self]
@property
def llvm_triple(self) -> str:
"""Converts to llvm triple."""
return f'{self.llvm_arch}-linux-android'
@property
def ndk_arch(self) -> str:
"""Converts to ndk arch."""
return {
Arch.ARM: 'arm',
Arch.AARCH64: 'arm64',
Arch.I386: 'x86',
Arch.X86_64: 'x86_64',
}[self]
@property
def ndk_triple(self) -> str:
if self == Arch.ARM:
return 'arm-linux-androideabi'
return self.llvm_triple
def _get_default_host() -> Host:
"""Returns the Host matching the current machine."""
if sys.platform.startswith('linux'):
return Host.Linux
if sys.platform.startswith('darwin'):
return Host.Darwin
if sys.platform.startswith('win'):
return Host.Windows
raise RuntimeError('Unsupported host: {}'.format(sys.platform))
_BUILD_OS_TYPE: Host = _get_default_host()
def build_host() -> Host:
"""Returns the cached Host matching the current machine."""
global _BUILD_OS_TYPE # pylint: disable=global-statement
return _BUILD_OS_TYPE