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# Copyright (c) 2020 Egor Tensin <egor@tensin.name>
# This file is part of the "cmake-common" project.
# For details, see https://github.com/egor-tensin/cmake-common.
# Distributed under the MIT License.

from enum import Enum
import platform


class OS(Enum):
    WINDOWS = 'Windows'
    LINUX = 'Linux'
    MACOS = 'macOS'

    def __str__(self):
        return str(self.value)

    @staticmethod
    def current():
        system = platform.system()
        mapping = {
            'Windows': OS.WINDOWS,
            'Linux': OS.LINUX,
            'Darwin': OS.MACOS,
        }
        if system not in mapping:
            raise NotImplementedError(f'unsupported OS: {system}')
        return mapping[system]


def on_windows():
    return OS.current() is OS.WINDOWS


def on_windows_like():
    os = OS.current()
    return os is OS.WINDOWS


def on_linux():
    return OS.current() is OS.LINUX


def on_linux_like():
    os = OS.current()
    return os is OS.LINUX or os is OS.MACOS