Gecko [ naturenectar.co.uk ]

Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2025-08-15 18:14
__init__.py	0 B	-rw-r--r--	2024-10-02 19:13
_log.py	1015 B	-rw-r--r--	2024-10-02 19:13
appdirs.py	1.63 KB	-rw-r--r--	2024-10-02 19:13
compat.py	1.84 KB	-rw-r--r--	2024-10-02 19:13
compatibility_tags.py	5.25 KB	-rw-r--r--	2024-10-02 19:13
datetime.py	242 B	-rw-r--r--	2024-10-02 19:13
deprecation.py	3.54 KB	-rw-r--r--	2024-10-02 19:13
direct_url_helpers.py	3.13 KB	-rw-r--r--	2024-10-02 19:13
distutils_args.py	1.22 KB	-rw-r--r--	2024-10-02 19:13
egg_link.py	2.15 KB	-rw-r--r--	2024-10-02 19:13
encoding.py	1.14 KB	-rw-r--r--	2024-10-02 19:13
entrypoints.py	1.1 KB	-rw-r--r--	2024-10-02 19:13
filesystem.py	5.75 KB	-rw-r--r--	2024-10-02 19:13
filetypes.py	716 B	-rw-r--r--	2024-10-02 19:13
glibc.py	3.04 KB	-rw-r--r--	2024-10-02 19:13
hashes.py	4.7 KB	-rw-r--r--	2024-10-02 19:13
inject_securetransport.py	795 B	-rw-r--r--	2024-10-02 19:13
logging.py	11.26 KB	-rw-r--r--	2024-10-02 19:13
misc.py	20.29 KB	-rw-r--r--	2024-10-02 19:13
models.py	1.17 KB	-rw-r--r--	2024-10-02 19:13
packaging.py	2.88 KB	-rw-r--r--	2024-10-02 19:13
parallel.py	3.12 KB	-rw-r--r--	2024-10-02 19:13
pkg_resources.py	987 B	-rw-r--r--	2024-10-02 19:13
setuptools_build.py	4.59 KB	-rw-r--r--	2024-10-02 19:13
subprocess.py	9.82 KB	-rw-r--r--	2024-10-02 19:13
temp_dir.py	7.48 KB	-rw-r--r--	2024-10-02 19:13
unpacking.py	8.94 KB	-rw-r--r--	2024-10-02 19:13
urls.py	1.72 KB	-rw-r--r--	2024-10-02 19:13
virtualenv.py	3.38 KB	-rw-r--r--	2024-10-02 19:13
wheel.py	6.02 KB	-rw-r--r--	2024-10-02 19:13

Rename

import hashlib
from typing import TYPE_CHECKING, BinaryIO, Dict, Iterator, List

from pip._internal.exceptions import HashMismatch, HashMissing, InstallationError
from pip._internal.utils.misc import read_chunks

if TYPE_CHECKING:
    from hashlib import _Hash

# NoReturn introduced in 3.6.2; imported only for type checking to maintain
    # pip compatibility with older patch versions of Python 3.6
    from typing import NoReturn

# The recommended hash algo of the moment. Change this whenever the state of
# the art changes; it won't hurt backward compatibility.
FAVORITE_HASH = "sha256"

# Names of hashlib algorithms allowed by the --hash option and ``pip hash``
# Currently, those are the ones at least as collision-resistant as sha256.
STRONG_HASHES = ["sha256", "sha384", "sha512"]

class Hashes:
    """A wrapper that builds multiple hashes at once and checks them against
    known-good values

"""

def __init__(self, hashes: Dict[str, List[str]] = None) -> None:
        """
        :param hashes: A dict of algorithm names pointing to lists of allowed
            hex digests
        """
        allowed = {}
        if hashes is not None:
            for alg, keys in hashes.items():
                # Make sure values are always sorted (to ease equality checks)
                allowed[alg] = sorted(keys)
        self._allowed = allowed

def __and__(self, other: "Hashes") -> "Hashes":
        if not isinstance(other, Hashes):
            return NotImplemented

# If either of the Hashes object is entirely empty (i.e. no hash
        # specified at all), all hashes from the other object are allowed.
        if not other:
            return self
        if not self:
            return other

# Otherwise only hashes that present in both objects are allowed.
        new = {}
        for alg, values in other._allowed.items():
            if alg not in self._allowed:
                continue
            new[alg] = [v for v in values if v in self._allowed[alg]]
        return Hashes(new)

@property
    def digest_count(self) -> int:
        return sum(len(digests) for digests in self._allowed.values())

def is_hash_allowed(self, hash_name: str, hex_digest: str) -> bool:
        """Return whether the given hex digest is allowed."""
        return hex_digest in self._allowed.get(hash_name, [])

def check_against_chunks(self, chunks: Iterator[bytes]) -> None:
        """Check good hashes against ones built from iterable of chunks of
        data.

Raise HashMismatch if none match.

"""
        gots = {}
        for hash_name in self._allowed.keys():
            try:
                gots[hash_name] = hashlib.new(hash_name)
            except (ValueError, TypeError):
                raise InstallationError(f"Unknown hash name: {hash_name}")

for chunk in chunks:
            for hash in gots.values():
                hash.update(chunk)

for hash_name, got in gots.items():
            if got.hexdigest() in self._allowed[hash_name]:
                return
        self._raise(gots)

def _raise(self, gots: Dict[str, "_Hash"]) -> "NoReturn":
        raise HashMismatch(self._allowed, gots)

def check_against_file(self, file: BinaryIO) -> None:
        """Check good hashes against a file-like object

Raise HashMismatch if none match.

"""
        return self.check_against_chunks(read_chunks(file))

def check_against_path(self, path: str) -> None:
        with open(path, "rb") as file:
            return self.check_against_file(file)

def __bool__(self) -> bool:
        """Return whether I know any known-good hashes."""
        return bool(self._allowed)

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

def __hash__(self) -> int:
        return hash(
            ",".join(
                sorted(
                    ":".join((alg, digest))
                    for alg, digest_list in self._allowed.items()
                    for digest in digest_list
                )
            )
        )

class MissingHashes(Hashes):
    """A workalike for Hashes used when we're missing a hash for a requirement

It computes the actual hash of the requirement and raises a HashMissing
    exception showing it to the user.

"""

def __init__(self) -> None:
        """Don't offer the ``hashes`` kwarg."""
        # Pass our favorite hash in to generate a "gotten hash". With the
        # empty list, it will never match, so an error will always raise.
        super().__init__(hashes={FAVORITE_HASH: []})

def _raise(self, gots: Dict[str, "_Hash"]) -> "NoReturn":
        raise HashMissing(gots[FAVORITE_HASH].hexdigest())