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requirements.py

# 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
        )

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Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	0755	2024-08-19 05:35:50
..	dir	-	root/root	0755	2024-08-19 05:35:50
__pycache__	dir	-	root/root	0755	2024-08-19 05:35:50
__init__.py	application/x-empty	0 B	root/root	0644	2024-08-19 05:35:50
_elffile.py	text/plain	3.19 KB	root/root	0644	2024-08-19 05:35:50
_manylinux.py	text/x-script.python	9.36 KB	root/root	0644	2024-08-19 05:35:50
_musllinux.py	text/plain	2.61 KB	root/root	0644	2024-08-19 05:35:50
_parser.py	text/plain	10.1 KB	root/root	0644	2024-08-19 05:35:50
_structures.py	text/x-script.python	1.4 KB	root/root	0644	2024-08-19 05:35:50
_tokenizer.py	text/x-script.python	5.17 KB	root/root	0644	2024-08-19 05:35:50
markers.py	text/x-script.python	8.04 KB	root/root	0644	2024-08-19 05:35:50
requirements.py	text/x-script.python	2.86 KB	root/root	0644	2024-08-19 05:35:50
specifiers.py	text/x-script.python	38.85 KB	root/root	0644	2024-08-19 05:35:50
tags.py	text/x-script.python	18.51 KB	root/root	0644	2024-08-19 05:35:50
utils.py	text/x-script.python	5.14 KB	root/root	0644	2024-08-19 05:35:50
version.py	text/x-script.python	15.85 KB	root/root	0644	2024-08-19 05:35:50