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<html lang="en">
<head>
    <meta charset="UTF-8">
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"""Tests for distutils.util."""

import email
import email.generator
import email.policy
import io
import os
import pathlib
import sys
import sysconfig as stdlib_sysconfig
import unittest.mock as mock
from copy import copy
from distutils import sysconfig, util
from distutils.errors import DistutilsByteCompileError, DistutilsPlatformError
from distutils.util import (
    byte_compile,
    change_root,
    check_environ,
    convert_path,
    get_host_platform,
    get_platform,
    grok_environment_error,
    rfc822_escape,
    split_quoted,
    strtobool,
)

import pytest


@pytest.fixture(autouse=True)
def environment(monkeypatch):
    monkeypatch.setattr(os, 'name', os.name)
    monkeypatch.setattr(sys, 'platform', sys.platform)
    monkeypatch.setattr(sys, 'version', sys.version)
    monkeypatch.setattr(os, 'sep', os.sep)
    monkeypatch.setattr(os.path, 'join', os.path.join)
    monkeypatch.setattr(os.path, 'isabs', os.path.isabs)
    monkeypatch.setattr(os.path, 'splitdrive', os.path.splitdrive)
    monkeypatch.setattr(sysconfig, '_config_vars', copy(sysconfig._config_vars))


@pytest.mark.usefixtures('save_env')
class TestUtil:
    def test_get_host_platform(self):
        with mock.patch('os.name', 'nt'):
            with mock.patch('sys.version', '... [... (ARM64)]'):
                assert get_host_platform() == 'win-arm64'
            with mock.patch('sys.version', '... [... (ARM)]'):
                assert get_host_platform() == 'win-arm32'

        with mock.patch('sys.version_info', (3, 9, 0, 'final', 0)):
            assert get_host_platform() == stdlib_sysconfig.get_platform()

    def test_get_platform(self):
        with mock.patch('os.name', 'nt'):
            with mock.patch.dict('os.environ', {'VSCMD_ARG_TGT_ARCH': 'x86'}):
                assert get_platform() == 'win32'
            with mock.patch.dict('os.environ', {'VSCMD_ARG_TGT_ARCH': 'x64'}):
                assert get_platform() == 'win-amd64'
            with mock.patch.dict('os.environ', {'VSCMD_ARG_TGT_ARCH': 'arm'}):
                assert get_platform() == 'win-arm32'
            with mock.patch.dict('os.environ', {'VSCMD_ARG_TGT_ARCH': 'arm64'}):
                assert get_platform() == 'win-arm64'

    def test_convert_path(self):
        expected = os.sep.join(('', 'home', 'to', 'my', 'stuff'))
        assert convert_path('/home/to/my/stuff') == expected
        assert convert_path(pathlib.Path('/home/to/my/stuff')) == expected
        assert convert_path('.') == os.curdir

    def test_change_root(self):
        # linux/mac
        os.name = 'posix'

        def _isabs(path):
            return path[0] == '/'

        os.path.isabs = _isabs

        def _join(*path):
            return '/'.join(path)

        os.path.join = _join

        assert change_root('/root', '/old/its/here') == '/root/old/its/here'
        assert change_root('/root', 'its/here') == '/root/its/here'

        # windows
        os.name = 'nt'
        os.sep = '\\'

        def _isabs(path):
            return path.startswith('c:\\')

        os.path.isabs = _isabs

        def _splitdrive(path):
            if path.startswith('c:'):
                return ('', path.replace('c:', ''))
            return ('', path)

        os.path.splitdrive = _splitdrive

        def _join(*path):
            return '\\'.join(path)

        os.path.join = _join

        assert (
            change_root('c:\\root', 'c:\\old\\its\\here') == 'c:\\root\\old\\its\\here'
        )
        assert change_root('c:\\root', 'its\\here') == 'c:\\root\\its\\here'

        # BugsBunny os (it's a great os)
        os.name = 'BugsBunny'
        with pytest.raises(DistutilsPlatformError):
            change_root('c:\\root', 'its\\here')

        # XXX platforms to be covered: mac

    def test_check_environ(self):
        util.check_environ.cache_clear()
        os.environ.pop('HOME', None)

        check_environ()

        assert os.environ['PLAT'] == get_platform()

    @pytest.mark.skipif("os.name != 'posix'")
    def test_check_environ_getpwuid(self):
        util.check_environ.cache_clear()
        os.environ.pop('HOME', None)

        import pwd

        # only set pw_dir field, other fields are not used
        result = pwd.struct_passwd((
            None,
            None,
            None,
            None,
            None,
            '/home/distutils',
            None,
        ))
        with mock.patch.object(pwd, 'getpwuid', return_value=result):
            check_environ()
            assert os.environ['HOME'] == '/home/distutils'

        util.check_environ.cache_clear()
        os.environ.pop('HOME', None)

        # bpo-10496: Catch pwd.getpwuid() error
        with mock.patch.object(pwd, 'getpwuid', side_effect=KeyError):
            check_environ()
            assert 'HOME' not in os.environ

    def test_split_quoted(self):
        assert split_quoted('""one"" "two" \'three\' \\four') == [
            'one',
            'two',
            'three',
            'four',
        ]

    def test_strtobool(self):
        yes = ('y', 'Y', 'yes', 'True', 't', 'true', 'True', 'On', 'on', '1')
        no = ('n', 'no', 'f', 'false', 'off', '0', 'Off', 'No', 'N')

        for y in yes:
            assert strtobool(y)

        for n in no:
            assert not strtobool(n)

    indent = 8 * ' '

    @pytest.mark.parametrize(
        "given,wanted",
        [
            # 0x0b, 0x0c, ..., etc are also considered a line break by Python
            ("hello\x0b\nworld\n", f"hello\x0b{indent}\n{indent}world\n{indent}"),
            ("hello\x1eworld", f"hello\x1e{indent}world"),
            ("", ""),
            (
                "I am a\npoor\nlonesome\nheader\n",
                f"I am a\n{indent}poor\n{indent}lonesome\n{indent}header\n{indent}",
            ),
        ],
    )
    def test_rfc822_escape(self, given, wanted):
        """
        We want to ensure a multi-line header parses correctly.

        For interoperability, the escaped value should also "round-trip" over
        `email.generator.Generator.flatten` and `email.message_from_*`
        (see pypa/setuptools#4033).

        The main issue is that internally `email.policy.EmailPolicy` uses
        `splitlines` w