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File Name : req_set.py

# The following comment should be removed at some point in the future.
# mypy: strict-optional=False

from __future__ import absolute_import

import logging
from collections import OrderedDict

from pip._vendor.packaging.utils import canonicalize_name

from pip._internal import pep425tags
from pip._internal.exceptions import InstallationError
from pip._internal.utils.logging import indent_log
from pip._internal.utils.typing import MYPY_CHECK_RUNNING
from pip._internal.wheel import Wheel

if MYPY_CHECK_RUNNING:
    from typing import Dict, Iterable, List, Optional, Tuple
    from pip._internal.req.req_install import InstallRequirement

logger = logging.getLogger(__name__)

class RequirementSet(object):

def __init__(self, require_hashes=False, check_supported_wheels=True):
        # type: (bool, bool) -> None
        """Create a RequirementSet.
        """

self.requirements = OrderedDict()  # type: Dict[str, InstallRequirement]  # noqa: E501
        self.require_hashes = require_hashes
        self.check_supported_wheels = check_supported_wheels

self.unnamed_requirements = []  # type: List[InstallRequirement]
        self.successfully_downloaded = []  # type: List[InstallRequirement]
        self.reqs_to_cleanup = []  # type: List[InstallRequirement]

def __str__(self):
        # type: () -> str
        requirements = sorted(
            (req for req in self.requirements.values() if not req.comes_from),
            key=lambda req: canonicalize_name(req.name),
        )
        return ' '.join(str(req.req) for req in requirements)

def __repr__(self):
        # type: () -> str
        requirements = sorted(
            self.requirements.values(),
            key=lambda req: canonicalize_name(req.name),
        )

format_string = '<{classname} object; {count} requirement(s): {reqs}>'
        return format_string.format(
            classname=self.__class__.__name__,
            count=len(requirements),
            reqs=', '.join(str(req.req) for req in requirements),
        )

def add_unnamed_requirement(self, install_req):
        # type: (InstallRequirement) -> None
        assert not install_req.name
        self.unnamed_requirements.append(install_req)

def add_named_requirement(self, install_req):
        # type: (InstallRequirement) -> None
        assert install_req.name

project_name = canonicalize_name(install_req.name)
        self.requirements[project_name] = install_req

def add_requirement(
        self,
        install_req,  # type: InstallRequirement
        parent_req_name=None,  # type: Optional[str]
        extras_requested=None  # type: Optional[Iterable[str]]
    ):
        # type: (...) -> Tuple[List[InstallRequirement], Optional[InstallRequirement]]  # noqa: E501
        """Add install_req as a requirement to install.

:param parent_req_name: The name of the requirement that needed this
            added. The name is used because when multiple unnamed requirements
            resolve to the same name, we could otherwise end up with dependency
            links that point outside the Requirements set. parent_req must
            already be added. Note that None implies that this is a user
            supplied requirement, vs an inferred one.
        :param extras_requested: an iterable of extras used to evaluate the
            environment markers.
        :return: Additional requirements to scan. That is either [] if
            the requirement is not applicable, or [install_req] if the
            requirement is applicable and has just been added.
        """
        # If the markers do not match, ignore this requirement.
        if not install_req.match_markers(extras_requested):
            logger.info(
                "Ignoring %s: markers '%s' don't match your environment",
                install_req.name, install_req.markers,
            )
            return [], None

# If the wheel is not supported, raise an error.
        # Should check this after filtering out based on environment markers to
        # allow specifying different wheels based on the environment/OS, in a
        # single requirements file.
        if install_req.link and install_req.link.is_wheel:
            wheel = Wheel(install_req.link.filename)
            tags = pep425tags.get_supported()
            if (self.check_supported_wheels and not wheel.supported(tags)):
                raise InstallationError(
                    "%s is not a supported wheel on this platform." %
                    wheel.filename
                )

# This next bit is really a sanity check.
        assert install_req.is_direct == (parent_req_name is None), (
            "a direct req shouldn't have a parent and also, "
            "a non direct req should have a parent"
        )

# Unnamed requirements are scanned again and the requirement won't be
        # added as a dependency until after scanning.
        if not install_req.name:
            self.add_unnamed_requirement(install_req)
            return [install_req], None

try:
            existing_req = self.get_requirement(install_req.name)
        except KeyError:
            existing_req = None

has_conflicting_requirement = (
            parent_req_name is None and
            existing_req and
            not existing_req.constraint and
            existing_req.extras == install_req.extras and
            existing_req.req.specifier != install_req.req.specifier
        )
        if has_conflicting_requirement:
            raise InstallationError(
                "Double requirement given: %s (already in %s, name=%r)"
                % (install_req, existing_req, install_req.name)
            )

# When no existing requirement exists, add the requirement as a
        # dependency and it will be scanned again after.
        if not existing_req:
            self.add_named_requirement(install_req)
            # We'd want to rescan this requirement later
            return [install_req], install_req

# Assume there's no need to scan, and that we've already
        # encountered this for scanning.
        if install_req.constraint or not existing_req.constraint:
            return [], existing_req

does_not_satisfy_constraint = (
            install_req.link and
            not (
                existing_req.link and
                install_req.link.path == existing_req.link.path
            )
        )
        if does_not_satisfy_constraint:
            self.reqs_to_cleanup.append(install_req)
            raise InstallationError(
                "Could not satisfy constraints for '%s': "
                "installation from path or url cannot be "
                "constrained to a version" % install_req.name,
            )
        # If we're now installing a constraint, mark the existing
        # object for real installation.
        existing_req.constraint = False
        existing_req.extras = tuple(sorted(
            set(existing_req.extras) | set(install_req.extras)
        ))
        logger.debug(
            "Setting %s extras to: %s",
            existing_req, existing_req.extras,
        )
        # Return the existing requirement for addition to the parent and
        # scanning again.
        return [existing_req], existing_req

def has_requirement(self, name):
        # type: (str) -> bool
        project_name = canonicalize_name(name)

return (
            project_name in self.requirements and
            not self.requirements[project_name].constraint
        )

def get_requirement(self, name):
        # type: (str) -> InstallRequirement
        project_name = canonicalize_name(name)

if project_name in self.requirements:
            return self.requirements[project_name]

raise KeyError("No project with the name %r" % name)

def cleanup_files(self):
        # type: () -> None
        """Clean up files, remove builds."""
        logger.debug('Cleaning up...')
        with indent_log():
            for req in self.reqs_to_cleanup:
                req.remove_temporary_source()

Name	Type	Size	Permission	Last Modified	Actions
.	dir	-	0755	2024-03-05 11:45:22
..	dir	-	0755	2024-03-05 11:45:22
__pycache__	dir	-	0755	2024-03-05 11:45:22
__init__.py	text/x-script.python	2.41 KB	0644	2023-10-17 06:30:24
constructors.py	text/plain	14.05 KB	0644	2023-10-17 06:30:24
req_file.py	text/plain	13.96 KB	0644	2023-10-17 06:30:24
req_install.py	text/x-script.python	35.78 KB	0644	2023-10-17 06:30:24
req_set.py	text/x-script.python	7.94 KB	0644	2023-10-17 06:30:24
req_tracker.py	text/x-script.python	3.12 KB	0644	2023-10-17 06:30:24
req_uninstall.py	text/x-script.python	23.04 KB	0644	2023-10-17 06:30:24