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File Name : 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.

import urllib.parse
from typing import Any, List, 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

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
        if parsed.url:
            parsed_url = urllib.parse.urlparse(parsed.url)
            if parsed_url.scheme == "file":
                if urllib.parse.urlunparse(parsed_url) != parsed.url:
                    raise InvalidRequirement("Invalid URL given")
            elif not (parsed_url.scheme and parsed_url.netloc) or (
                not parsed_url.scheme and not parsed_url.netloc
            ):
                raise InvalidRequirement(f"Invalid URL: {parsed.url}")
            self.url: Optional[str] = parsed.url
        else:
            self.url = None
        self.extras: Set[str] = set(parsed.extras if parsed.extras else [])
        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 __str__(self) -> str:
        parts: List[str] = [self.name]

if self.extras:
            formatted_extras = ",".join(sorted(self.extras))
            parts.append(f"[{formatted_extras}]")

if self.specifier:
            parts.append(str(self.specifier))

if self.url:
            parts.append(f"@ {self.url}")
            if self.marker:
                parts.append(" ")

if self.marker:
            parts.append(f"; {self.marker}")

return "".join(parts)

def __repr__(self) -> str:
        return f"<Requirement('{self}')>"

def __hash__(self) -> int:
        return hash((self.__class__.__name__, str(self)))

def __eq__(self, other: Any) -> bool:
        if not isinstance(other, Requirement):
            return NotImplemented

return (
            self.name == other.name
            and self.extras == other.extras
            and self.specifier == other.specifier
            and self.url == other.url
            and self.marker == other.marker
        )

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/linksafe	0755	2025-01-15 06:08:21
..	dir	-	root/linksafe	0755	2025-01-15 06:08:21
__pycache__	dir	-	root/linksafe	0755	2025-01-15 06:08:21
__init__.py	text/plain	501 B	root/linksafe	0644	2024-12-01 12:53:24
_elffile.py	text/plain	3.19 KB	root/linksafe	0644	2024-12-01 12:53:24
_manylinux.py	text/x-script.python	8.72 KB	root/linksafe	0644	2024-12-01 12:53:24
_musllinux.py	text/plain	2.46 KB	root/linksafe	0644	2024-12-01 12:53:24
_parser.py	text/plain	9.96 KB	root/linksafe	0644	2024-12-01 12:53:24
_structures.py	text/x-script.python	1.4 KB	root/linksafe	0644	2024-12-01 12:53:24
_tokenizer.py	text/x-script.python	5.17 KB	root/linksafe	0644	2024-12-01 12:53:24
markers.py	text/x-script.python	8.02 KB	root/linksafe	0644	2024-12-01 12:53:24
metadata.py	text/x-script.python	16.01 KB	root/linksafe	0644	2024-12-01 12:53:24
py.typed	application/x-empty	0 B	root/linksafe	0644	2024-12-01 12:53:24
requirements.py	text/x-script.python	3.21 KB	root/linksafe	0644	2024-12-01 12:53:24
specifiers.py	text/x-script.python	38.29 KB	root/linksafe	0644	2024-12-01 12:53:24
tags.py	text/x-script.python	17.68 KB	root/linksafe	0644	2024-12-01 12:53:24
utils.py	text/x-script.python	4.25 KB	root/linksafe	0644	2024-12-01 12:53:24
version.py	text/x-script.python	15.94 KB	root/linksafe	0644	2024-12-01 12:53:24

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