# Python
__pycache__/
*.py[cod]
*$py.class
*.so
.Python
build/
develop-eggs/
dist/
downloads/
eggs/
.eggs/
lib/
lib64/
parts/
sdist/
var/
wheels/
*.egg-info/
.installed.cfg
*.egg

# Virtual Environment
venv/
ENV/
env/

# Flask
instance/
.webassets-cache

# Database
*.db
*.sqlite
*.sqlite3

# Logs
*.log
app.log

# Environment variables
.env
.env.local

# IDE
.vscode/
.idea/
*.swp
*.swo
*~

# OS
.DS_Store
Thumbs.db

# Temporary files
*.tmp
*.bak
*.cache

from ._dists import Distribution
from ._envs import Environment

__all__ = ["NAME", "Distribution", "Environment"]

NAME = "importlib"

from typing import FrozenSet, Optional, Set

from pip._vendor.packaging.utils import canonicalize_name

from pip._internal.exceptions import CommandError


class FormatControl:
    """Helper for managing formats from which a package can be installed."""

    __slots__ = ["no_binary", "only_binary"]

    def __init__(
        self,
        no_binary: Optional[Set[str]] = None,
        only_binary: Optional[Set[str]] = None,
    ) -> None:
        if no_binary is None:
            no_binary = set()
        if only_binary is None:
            only_binary = set()

        self.no_binary = no_binary
        self.only_binary = only_binary

    def __eq__(self, other: object) -> bool:
        if not isinstance(other, self.__class__):
            return NotImplemented

        if self.__slots__ != other.__slots__:
            return False

        return all(getattr(self, k) == getattr(other, k) for k in self.__slots__)

    def __repr__(self) -> str:
        return f"{self.__class__.__name__}({self.no_binary}, {self.only_binary})"

    @staticmethod
    def handle_mutual_excludes(value: str, target: Set[str], other: Set[str]) -> None:
        if value.startswith("-"):
            raise CommandError(
                "--no-binary / --only-binary option requires 1 argument."
            )
        new = value.split(",")
        while ":all:" in new:
            other.clear()
            target.clear()
            target.add(":all:")
            del new[: new.index(":all:") + 1]
            # Without a none, we want to discard everything as :all: covers it
            if ":none:" not in new:
                return
        for name in new:
            if name == ":none:":
                target.clear()
                continue
            name = canonicalize_name(name)
            other.discard(name)
            target.add(name)

    def get_allowed_formats(self, canonical_name: str) -> FrozenSet[str]:
        result = {"binary", "source"}
        if canonical_name in self.only_binary:
            result.discard("source")
        elif canonical_name in self.no_binary:
            result.discard("binary")
        elif ":all:" in self.only_binary:
            result.discard("source")
        elif ":all:" in self.no_binary:
            result.discard("binary")
        return frozenset(result)

    def disallow_binaries(self) -> None:
        self.handle_mutual_excludes(
            ":all:",
            self.no_binary,
            self.only_binary,
        )

"""Contains purely network-related utilities.
"""

import functools
from time import perf_counter, sleep
from typing import Callable, TypeVar

from pip._vendor.typing_extensions import ParamSpec

T = TypeVar("T")
P = ParamSpec("P")


def retry(
    wait: float, stop_after_delay: float
) -> Callable[[Callable[P, T]], Callable[P, T]]:
    """Decorator to automatically retry a function on error.

    If the function raises, the function is recalled with the same arguments
    until it returns or the time limit is reached. When the time limit is
    surpassed, the last exception raised is reraised.

    :param wait: The time to wait after an error before retrying, in seconds.
    :param stop_after_delay: The time limit after which retries will cease,
        in seconds.
    """

    def wrapper(func: Callable[P, T]) -> Callable[P, T]:

        @functools.wraps(func)
        def retry_wrapped(*args: P.args, **kwargs: P.kwargs) -> T:
            # The performance counter is monotonic on all platforms we care
            # about and has much better resolution than time.monotonic().
            start_time = perf_counter()
            while True:
                try:
                    return func(*args, **kwargs)
                except Exception:
                    if perf_counter() - start_time > stop_after_delay:
                        raise
                    sleep(wait)

        return retry_wrapped

    return wrapper

from collections import namedtuple
import datetime
import struct


class ExtType(namedtuple("ExtType", "code data")):
    """ExtType represents ext type in msgpack."""

    def __new__(cls, code, data):
        if not isinstance(code, int):
            raise TypeError("code must be int")
        if not isinstance(data, bytes):
            raise TypeError("data must be bytes")
        if not 0 <= code <= 127:
            raise ValueError("code must be 0~127")
        return super().__new__(cls, code, data)


class Timestamp:
    """Timestamp represents the Timestamp extension type in msgpack.

    When built with Cython, msgpack uses C methods to pack and unpack `Timestamp`.
    When using pure-Python msgpack, :func:`to_bytes` and :func:`from_bytes` are used to pack and
    unpack `Timestamp`.

    This class is immutable: Do not override seconds and nanoseconds.
    """

    __slots__ = ["seconds", "nanoseconds"]

    def __init__(self, seconds, nanoseconds=0):
        """Initialize a Timestamp object.

        :param int seconds:
            Number of seconds since the UNIX epoch (00:00:00 UTC Jan 1 1970, minus leap seconds).
            May be negative.

        :param int nanoseconds:
            Number of nanoseconds to add to `seconds` to get fractional time.
            Maximum is 999_999_999.  Default is 0.

        Note: Negative times (before the UNIX epoch) are represented as neg. seconds + pos. ns.
        """
        if not isinstance(seconds, int):
            raise TypeError("seconds must be an integer")
        if not isinstance(nanoseconds, int):
            raise TypeError("nanoseconds must be an integer")
        if not (0 <= nanoseconds < 10**9):
            raise ValueError("nanoseconds must be a non-negative integer less than 999999999.")
        self.seconds = seconds
        self.nanoseconds = nanoseconds

    def __repr__(self):
        """String representation of Timestamp."""
        return f"Timestamp(seconds={self.seconds}, nanoseconds={self.nanoseconds})"

    def __eq__(self, other):
        """Check for equality with another Timestamp object"""
        if type(other) is self.__class__:
            return self.seconds == other.seconds and self.nanoseconds == other.nanoseconds
        return False

    def __ne__(self, other):
        """not-equals method (see :func:`__eq__()`)"""
        return not self.__eq__(other)

    def __hash__(self):
        return hash((self.seconds, self.nanoseconds))

    @staticmethod
    def from_bytes(b):
        """Unpack bytes into a `Timestamp` object.

        Used for pure-Python msgpack unpacking.

        :param b: Payload from msgpack ext message with code -1
        :type b: bytes

        :returns: Timestamp object unpacked from msgpack ext payload
        :rtype: Timestamp
        """
        if len(b) == 4:
            seconds = struct.unpack("!L", b)[0]
            nanoseconds = 0
        elif len(b) == 8:
            data64 = struct.unpack("!Q", b)[0]
            seconds = data64 & 0x00000003FFFFFFFF
            nanoseconds = data64 >> 34
        elif len(b) == 12:
            nanoseconds, seconds = struct.unpack("!Iq", b)
        else:
            raise ValueError(
                "Timestamp type can only be created from 32, 64, or 96-bit byte objects"
            )
        return Timestamp(seconds, nanoseconds)

    def to_bytes(self):
        """Pack this Timestamp object into bytes.

        Used for pure-Python msgpack packing.

        :returns data: Payload for EXT message with code -1 (timestamp type)
        :rtype: bytes
        """
        if (self.seconds >> 34) == 0:  # seconds is non-negative and fits in 34 bits
            data64 = self.nanoseconds << 34 | self.seconds
            if data64 & 0xFFFFFFFF00000000 == 0:
                # nanoseconds is zero and seconds < 2**32, so timestamp 32
                data = struct.pack("!L", data64)
            else:
                # timestamp 64
                data = struct.pack("!Q", data64)
        else:
            # timestamp 96
            data = struct.pack("!Iq", self.nanoseconds, self.seconds)
        return data

    @staticmethod
    def from_unix(unix_sec):
        """Create a Timestamp from posix timestamp in seconds.

        :param unix_float: Posix timestamp in seconds.
        :type unix_float: int or float
        """
        seconds = int(unix_sec // 1)
        nanoseconds = int((unix_sec % 1) * 10**9)
        return Timestamp(seconds, nanoseconds)

    def to_unix(self):
        """Get the timestamp as a floating-point value.

        :returns: posix timestamp
        :rtype: float
        """
        return self.seconds + self.nanoseconds / 1e9

    @staticmethod
    def from_unix_nano(unix_ns):
        """Create a Timestamp from posix timestamp in nanoseconds.

        :param int unix_ns: Posix timestamp in nanoseconds.
        :rtype: Timestamp
        """
        return Timestamp(*divmod(unix_ns, 10**9))

    def to_unix_nano(self):
        """Get the timestamp as a unixtime in nanoseconds.

        :returns: posix timestamp in nanoseconds
        :rtype: int
        """
        return self.seconds * 10**9 + self.nanoseconds

    def to_datetime(self):
        """Get the timestamp as a UTC datetime.

        :rtype: `datetime.datetime`
        """
        utc = datetime.timezone.utc
        return datetime.datetime.fromtimestamp(0, utc) + datetime.timedelta(seconds=self.to_unix())

    @staticmethod
    def from_datetime(dt):
        """Create a Timestamp from datetime with tzinfo.

        :rtype: Timestamp
        """
        return Timestamp.from_unix(dt.timestamp())