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| \/ | \ \ / / | __ \ (_) | | / ____| | | | |
| \ / |_ __\ V / | |__) | __ ___ ____ _| |_ ___ | (___ | |__ ___| | |
| |\/| | '__|> < | ___/ '__| \ \ / / _` | __/ _ \ \___ \| '_ \ / _ \ | |
| | | | |_ / . \ | | | | | |\ V / (_| | || __/ ____) | | | | __/ | |
|_| |_|_(_)_/ \_\ |_| |_| |_| \_/ \__,_|\__\___| |_____/|_| |_|\___V 2.1
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# This file is dual licensed under the terms of the Apache License, Version
# 2.0, and the BSD License. See the LICENSE file in the root of this repository
# for complete details.
from __future__ import annotations
import re
from typing import NewType, Tuple, Union, cast
from .tags import Tag, parse_tag
from .version import InvalidVersion, Version, _TrimmedRelease
BuildTag = Union[Tuple[()], Tuple[int, str]]
NormalizedName = NewType("NormalizedName", str)
class InvalidName(ValueError):
"""
An invalid distribution name; users should refer to the packaging user guide.
"""
class InvalidWheelFilename(ValueError):
"""
An invalid wheel filename was found, users should refer to PEP 427.
"""
class InvalidSdistFilename(ValueError):
"""
An invalid sdist filename was found, users should refer to the packaging user guide.
"""
# Core metadata spec for `Name`
_validate_regex = re.compile(r"[A-Z0-9]|[A-Z0-9][A-Z0-9._-]*[A-Z0-9]", re.IGNORECASE)
_normalized_regex = re.compile(r"[a-z0-9]|[a-z0-9]([a-z0-9-](?!--))*[a-z0-9]")
# PEP 427: The build number must start with a digit.
_build_tag_regex = re.compile(r"(\d+)(.*)")
def canonicalize_name(name: str, *, validate: bool = False) -> NormalizedName:
if validate and not _validate_regex.fullmatch(name):
raise InvalidName(f"name is invalid: {name!r}")
# Ensure all ``.`` and ``_`` are ``-``
# Emulates ``re.sub(r"[-_.]+", "-", name).lower()`` from PEP 503
# Much faster than re, and even faster than str.translate
value = name.lower().replace("_", "-").replace(".", "-")
# Condense repeats (faster than regex)
while "--" in value:
value = value.replace("--", "-")
return cast("NormalizedName", value)
def is_normalized_name(name: str) -> bool:
return _normalized_regex.fullmatch(name) is not None
def canonicalize_version(
version: Version | str, *, strip_trailing_zero: bool = True
) -> str:
"""
Return a canonical form of a version as a string.
>>> canonicalize_version('1.0.1')
'1.0.1'
Per PEP 625, versions may have multiple canonical forms, differing
only by trailing zeros.
>>> canonicalize_version('1.0.0')
'1'
>>> canonicalize_version('1.0.0', strip_trailing_zero=False)
'1.0.0'
Invalid versions are returned unaltered.
>>> canonicalize_version('foo bar baz')
'foo bar baz'
"""
if isinstance(version, str):
try:
version = Version(version)
except InvalidVersion:
return str(version)
return str(_TrimmedRelease(version) if strip_trailing_zero else version)
def parse_wheel_filename(
filename: str,
) -> tuple[NormalizedName, Version, BuildTag, frozenset[Tag]]:
if not filename.endswith(".whl"):
raise InvalidWheelFilename(
f"Invalid wheel filename (extension must be '.whl'): {filename!r}"
)
filename = filename[:-4]
dashes = filename.count("-")
if dashes not in (4, 5):
raise InvalidWheelFilename(
f"Invalid wheel filename (wrong number of parts): {filename!r}"
)
parts = filename.split("-", dashes - 2)
name_part = parts[0]
# See PEP 427 for the rules on escaping the project name.
if "__" in name_part or re.match(r"^[\w\d._]*$", name_part, re.UNICODE) is None:
raise InvalidWheelFilename(f"Invalid project name: {filename!r}")
name = canonicalize_name(name_part)
try:
version = Version(parts[1])
except InvalidVersion as e:
raise InvalidWheelFilename(
f"Invalid wheel filename (invalid version): {filename!r}"
) from e
if dashes == 5:
build_part = parts[2]
build_match = _build_tag_regex.match(build_part)
if build_match is None:
raise InvalidWheelFilename(
f"Invalid build number: {build_part} in {filename!r}"
)
build = cast("BuildTag", (int(build_match.group(1)), build_match.group(2)))
else:
build = ()
tags = parse_tag(parts[-1])
return (name, version, build, tags)
def parse_sdist_filename(filename: str) -> tuple[NormalizedName, Version]:
if filename.endswith(".tar.gz"):
file_stem = filename[: -len(".tar.gz")]
elif filename.endswith(".zip"):
file_stem = filename[: -len(".zip")]
else:
raise InvalidSdistFilename(
f"Invalid sdist filename (extension must be '.tar.gz' or '.zip'):"
f" {filename!r}"
)
# We are requiring a PEP 440 version, which cannot contain dashes,
# so we split on the last dash.
name_part, sep, version_part = file_stem.rpartition("-")
if not sep:
raise InvalidSdistFilename(f"Invalid sdist filename: {filename!r}")
name = canonicalize_name(name_part)
try:
version = Version(version_part)
except InvalidVersion as e:
raise InvalidSdistFilename(
f"Invalid sdist filename (invalid version): {filename!r}"
) from e
return (name, version)