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command	-	0755	-
compat	-	0755	-
config	-	0755	-
tests	-	0755	-
__init__.py	10.16 KB	0644	Edit Rename Delete
_core_metadata.py	11.7 KB	0644	Edit Rename Delete
_entry_points.py	2.26 KB	0644	Edit Rename Delete
_imp.py	2.38 KB	0644	Edit Rename Delete
_importlib.py	223 B	0644	Edit Rename Delete
_itertools.py	657 B	0644	Edit Rename Delete
_normalization.py	5.69 KB	0644	Edit Rename Delete
_path.py	2.62 KB	0644	Edit Rename Delete
_reqs.py	1.4 KB	0644	Edit Rename Delete
_shutil.py	1.46 KB	0644	Edit Rename Delete
_static.py	4.74 KB	0644	Edit Rename Delete
archive_util.py	7.18 KB	0644	Edit Rename Delete
build_meta.py	19.97 KB	0644	Edit Rename Delete
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depends.py	5.83 KB	0644	Edit Rename Delete
discovery.py	20.76 KB	0644	Edit Rename Delete
dist.py	43.84 KB	0644	Edit Rename Delete
errors.py	2.95 KB	0644	Edit Rename Delete
extension.py	6.53 KB	0644	Edit Rename Delete
glob.py	5.92 KB	0644	Edit Rename Delete
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unicode_utils.py	3.11 KB	0644	Edit Rename Delete
version.py	161 B	0644	Edit Rename Delete
warnings.py	3.71 KB	0644	Edit Rename Delete
wheel.py	8.42 KB	0644	Edit Rename Delete
windows_support.py	726 B	0644	Edit Rename Delete

Edit File:_normalization.py

"""
Helpers for normalization as expected in wheel/sdist/module file names
and core metadata
"""

import re
from typing import TYPE_CHECKING

import packaging

# https://packaging.python.org/en/latest/specifications/core-metadata/#name
_VALID_NAME = re.compile(r"^([A-Z0-9]|[A-Z0-9][A-Z0-9._-]*[A-Z0-9])$", re.I)
_UNSAFE_NAME_CHARS = re.compile(r"[^A-Z0-9._-]+", re.I)
_NON_ALPHANUMERIC = re.compile(r"[^A-Z0-9]+", re.I)
_PEP440_FALLBACK = re.compile(r"^v?(?P<safe>(?:[0-9]+!)?[0-9]+(?:\.[0-9]+)*)", re.I)

def safe_identifier(name: str) -> str:
    """Make a string safe to be used as Python identifier.
    >>> safe_identifier("12abc")
    '_12abc'
    >>> safe_identifier("__editable__.myns.pkg-78.9.3_local")
    '__editable___myns_pkg_78_9_3_local'
    """
    safe = re.sub(r'\W|^(?=\d)', '_', name)
    assert safe.isidentifier()
    return safe

def safe_name(component: str) -> str:
    """Escape a component used as a project name according to Core Metadata.
    >>> safe_name("hello world")
    'hello-world'
    >>> safe_name("hello?world")
    'hello-world'
    >>> safe_name("hello_world")
    'hello_world'
    """
    # See pkg_resources.safe_name
    return _UNSAFE_NAME_CHARS.sub("-", component)

def safe_version(version: str) -> str:
    """Convert an arbitrary string into a valid version string.
    Can still raise an ``InvalidVersion`` exception.
    To avoid exceptions use ``best_effort_version``.
    >>> safe_version("1988 12 25")
    '1988.12.25'
    >>> safe_version("v0.2.1")
    '0.2.1'
    >>> safe_version("v0.2?beta")
    '0.2b0'
    >>> safe_version("v0.2 beta")
    '0.2b0'
    >>> safe_version("ubuntu lts")
    Traceback (most recent call last):
    ...
    packaging.version.InvalidVersion: Invalid version: 'ubuntu.lts'
    """
    v = version.replace(' ', '.')
    try:
        return str(packaging.version.Version(v))
    except packaging.version.InvalidVersion:
        attempt = _UNSAFE_NAME_CHARS.sub("-", v)
        return str(packaging.version.Version(attempt))

def best_effort_version(version: str) -> str:
    """Convert an arbitrary string into a version-like string.
    Fallback when ``safe_version`` is not safe enough.
    >>> best_effort_version("v0.2 beta")
    '0.2b0'
    >>> best_effort_version("ubuntu lts")
    '0.dev0+sanitized.ubuntu.lts'
    >>> best_effort_version("0.23ubuntu1")
    '0.23.dev0+sanitized.ubuntu1'
    >>> best_effort_version("0.23-")
    '0.23.dev0+sanitized'
    >>> best_effort_version("0.-_")
    '0.dev0+sanitized'
    >>> best_effort_version("42.+?1")
    '42.dev0+sanitized.1'
    """
    # See pkg_resources._forgiving_version
    try:
        return safe_version(version)
    except packaging.version.InvalidVersion:
        v = version.replace(' ', '.')
        match = _PEP440_FALLBACK.search(v)
        if match:
            safe = match["safe"]
            rest = v[len(safe) :]
        else:
            safe = "0"
            rest = version
        safe_rest = _NON_ALPHANUMERIC.sub(".", rest).strip(".")
        local = f"sanitized.{safe_rest}".strip(".")
        return safe_version(f"{safe}.dev0+{local}")

def safe_extra(extra: str) -> str:
    """Normalize extra name according to PEP 685
    >>> safe_extra("_FrIeNdLy-._.-bArD")
    'friendly-bard'
    >>> safe_extra("FrIeNdLy-._.-bArD__._-")
    'friendly-bard'
    """
    return _NON_ALPHANUMERIC.sub("-", extra).strip("-").lower()

def filename_component(value: str) -> str:
    """Normalize each component of a filename (e.g. distribution/version part of wheel)
    Note: ``value`` needs to be already normalized.
    >>> filename_component("my-pkg")
    'my_pkg'
    """
    return value.replace("-", "_").strip("_")

def filename_component_broken(value: str) -> str:
    """
    Produce the incorrect filename component for compatibility.

See pypa/setuptools#4167 for detailed analysis.

TODO: replace this with filename_component after pip 24 is
    nearly-ubiquitous.

>>> filename_component_broken('foo_bar-baz')
    'foo-bar-baz'
    """
    return value.replace('_', '-')

def safer_name(value: str) -> str:
    """Like ``safe_name`` but can be used as filename component for wheel"""
    # See bdist_wheel.safer_name
    return (
        # Per https://packaging.python.org/en/latest/specifications/name-normalization/#name-normalization
        re.sub(r"[-_.]+", "-", safe_name(value))
        .lower()
        # Per https://packaging.python.org/en/latest/specifications/binary-distribution-format/#escaping-and-unicode
        .replace("-", "_")
    )

def safer_best_effort_version(value: str) -> str:
    """Like ``best_effort_version`` but can be used as filename component for wheel"""
    # See bdist_wheel.safer_verion
    # TODO: Replace with only safe_version in the future (no need for best effort)
    return filename_component(best_effort_version(value))

def _missing_canonicalize_license_expression(expression: str) -> str:
    """
    Defer import error to affect only users that actually use it
    https://github.com/pypa/setuptools/issues/4894
    >>> _missing_canonicalize_license_expression("a OR b")
    Traceback (most recent call last):
    ...
    ImportError: ...Cannot import `packaging.licenses`...
    """
    raise ImportError(
        "Cannot import `packaging.licenses`."
        """
        Setuptools>=77.0.0 requires "packaging>=24.2" to work properly.
        Please make sure you have a suitable version installed.
        """
    )

try:
    from packaging.licenses import (
        canonicalize_license_expression as _canonicalize_license_expression,
    )
except ImportError:  # pragma: nocover
    if not TYPE_CHECKING:
        # XXX: pyright is still upset even with # pyright: ignore[reportAssignmentType]
        _canonicalize_license_expression = _missing_canonicalize_license_expression

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