mirror of
https://github.com/SickGear/SickGear.git
synced 2024-11-28 15:43:37 +00:00
90 lines
2.9 KiB
Python
90 lines
2.9 KiB
Python
# 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 typing import Any, Iterator, Optional, Set
|
|
|
|
from ._parser import parse_requirement as _parse_requirement
|
|
from ._tokenizer import ParserSyntaxError
|
|
from .markers import Marker, _normalize_extra_values
|
|
from .specifiers import SpecifierSet
|
|
from .utils import canonicalize_name
|
|
|
|
|
|
class InvalidRequirement(ValueError):
|
|
"""
|
|
An invalid requirement was found, users should refer to PEP 508.
|
|
"""
|
|
|
|
|
|
class Requirement:
|
|
"""Parse a requirement.
|
|
|
|
Parse a given requirement string into its parts, such as name, specifier,
|
|
URL, and extras. Raises InvalidRequirement on a badly-formed requirement
|
|
string.
|
|
"""
|
|
|
|
# TODO: Can we test whether something is contained within a requirement?
|
|
# If so how do we do that? Do we need to test against the _name_ of
|
|
# the thing as well as the version? What about the markers?
|
|
# TODO: Can we normalize the name and extra name?
|
|
|
|
def __init__(self, requirement_string: str) -> None:
|
|
try:
|
|
parsed = _parse_requirement(requirement_string)
|
|
except ParserSyntaxError as e:
|
|
raise InvalidRequirement(str(e)) from e
|
|
|
|
self.name: str = parsed.name
|
|
self.url: Optional[str] = parsed.url or None
|
|
self.extras: Set[str] = set(parsed.extras or [])
|
|
self.specifier: SpecifierSet = SpecifierSet(parsed.specifier)
|
|
self.marker: Optional[Marker] = None
|
|
if parsed.marker is not None:
|
|
self.marker = Marker.__new__(Marker)
|
|
self.marker._markers = _normalize_extra_values(parsed.marker)
|
|
|
|
def _iter_parts(self, name: str) -> Iterator[str]:
|
|
yield name
|
|
|
|
if self.extras:
|
|
formatted_extras = ",".join(sorted(self.extras))
|
|
yield f"[{formatted_extras}]"
|
|
|
|
if self.specifier:
|
|
yield str(self.specifier)
|
|
|
|
if self.url:
|
|
yield f"@ {self.url}"
|
|
if self.marker:
|
|
yield " "
|
|
|
|
if self.marker:
|
|
yield f"; {self.marker}"
|
|
|
|
def __str__(self) -> str:
|
|
return "".join(self._iter_parts(self.name))
|
|
|
|
def __repr__(self) -> str:
|
|
return f"<Requirement('{self}')>"
|
|
|
|
def __hash__(self) -> int:
|
|
return hash(
|
|
(
|
|
self.__class__.__name__,
|
|
*self._iter_parts(canonicalize_name(self.name)),
|
|
)
|
|
)
|
|
|
|
def __eq__(self, other: Any) -> bool:
|
|
if not isinstance(other, Requirement):
|
|
return NotImplemented
|
|
|
|
return (
|
|
canonicalize_name(self.name) == canonicalize_name(other.name)
|
|
and self.extras == other.extras
|
|
and self.specifier == other.specifier
|
|
and self.url == other.url
|
|
and self.marker == other.marker
|
|
)
|