Current File : //opt/alt/python39/lib/python3.9/site-packages/pip/_internal/req/req_install.py
# The following comment should be removed at some point in the future.
# mypy: strict-optional=False
import functools
import logging
import os
import shutil
import sys
import uuid
import zipfile
from typing import Any, Collection, Dict, Iterable, List, Optional, Sequence, Union
from pip._vendor import pkg_resources
from pip._vendor.packaging.markers import Marker
from pip._vendor.packaging.requirements import Requirement
from pip._vendor.packaging.specifiers import SpecifierSet
from pip._vendor.packaging.utils import canonicalize_name
from pip._vendor.packaging.version import Version
from pip._vendor.packaging.version import parse as parse_version
from pip._vendor.pep517.wrappers import Pep517HookCaller
from pip._vendor.pkg_resources import Distribution
from pip._internal.build_env import BuildEnvironment, NoOpBuildEnvironment
from pip._internal.exceptions import InstallationError
from pip._internal.locations import get_scheme
from pip._internal.models.link import Link
from pip._internal.operations.build.metadata import generate_metadata
from pip._internal.operations.build.metadata_editable import generate_editable_metadata
from pip._internal.operations.build.metadata_legacy import (
generate_metadata as generate_metadata_legacy,
)
from pip._internal.operations.install.editable_legacy import (
install_editable as install_editable_legacy,
)
from pip._internal.operations.install.legacy import LegacyInstallFailure
from pip._internal.operations.install.legacy import install as install_legacy
from pip._internal.operations.install.wheel import install_wheel
from pip._internal.pyproject import load_pyproject_toml, make_pyproject_path
from pip._internal.req.req_uninstall import UninstallPathSet
from pip._internal.utils.deprecation import deprecated
from pip._internal.utils.direct_url_helpers import (
direct_url_for_editable,
direct_url_from_link,
)
from pip._internal.utils.hashes import Hashes
from pip._internal.utils.misc import (
ask_path_exists,
backup_dir,
display_path,
dist_in_install_path,
dist_in_site_packages,
dist_in_usersite,
get_distribution,
hide_url,
redact_auth_from_url,
)
from pip._internal.utils.packaging import get_metadata
from pip._internal.utils.subprocess import runner_with_spinner_message
from pip._internal.utils.temp_dir import TempDirectory, tempdir_kinds
from pip._internal.utils.virtualenv import running_under_virtualenv
from pip._internal.vcs import vcs
logger = logging.getLogger(__name__)
def _get_dist(metadata_directory: str) -> Distribution:
"""Return a pkg_resources.Distribution for the provided
metadata directory.
"""
dist_dir = metadata_directory.rstrip(os.sep)
# Build a PathMetadata object, from path to metadata. :wink:
base_dir, dist_dir_name = os.path.split(dist_dir)
metadata = pkg_resources.PathMetadata(base_dir, dist_dir)
# Determine the correct Distribution object type.
if dist_dir.endswith(".egg-info"):
dist_cls = pkg_resources.Distribution
dist_name = os.path.splitext(dist_dir_name)[0]
else:
assert dist_dir.endswith(".dist-info")
dist_cls = pkg_resources.DistInfoDistribution
dist_name = os.path.splitext(dist_dir_name)[0].split("-")[0]
return dist_cls(
base_dir,
project_name=dist_name,
metadata=metadata,
)
class InstallRequirement:
"""
Represents something that may be installed later on, may have information
about where to fetch the relevant requirement and also contains logic for
installing the said requirement.
"""
def __init__(
self,
req: Optional[Requirement],
comes_from: Optional[Union[str, "InstallRequirement"]],
editable: bool = False,
link: Optional[Link] = None,
markers: Optional[Marker] = None,
use_pep517: Optional[bool] = None,
isolated: bool = False,
install_options: Optional[List[str]] = None,
global_options: Optional[List[str]] = None,
hash_options: Optional[Dict[str, List[str]]] = None,
constraint: bool = False,
extras: Collection[str] = (),
user_supplied: bool = False,
permit_editable_wheels: bool = False,
) -> None:
assert req is None or isinstance(req, Requirement), req
self.req = req
self.comes_from = comes_from
self.constraint = constraint
self.editable = editable
self.permit_editable_wheels = permit_editable_wheels
self.legacy_install_reason: Optional[int] = None
# source_dir is the local directory where the linked requirement is
# located, or unpacked. In case unpacking is needed, creating and
# populating source_dir is done by the RequirementPreparer. Note this
# is not necessarily the directory where pyproject.toml or setup.py is
# located - that one is obtained via unpacked_source_directory.
self.source_dir: Optional[str] = None
if self.editable:
assert link
if link.is_file:
self.source_dir = os.path.normpath(os.path.abspath(link.file_path))
if link is None and req and req.url:
# PEP 508 URL requirement
link = Link(req.url)
self.link = self.original_link = link
self.original_link_is_in_wheel_cache = False
# Path to any downloaded or already-existing package.
self.local_file_path: Optional[str] = None
if self.link and self.link.is_file:
self.local_file_path = self.link.file_path
if extras:
self.extras = extras
elif req:
self.extras = {pkg_resources.safe_extra(extra) for extra in req.extras}
else:
self.extras = set()
if markers is None and req:
markers = req.marker
self.markers = markers
# This holds the pkg_resources.Distribution object if this requirement
# is already available:
self.satisfied_by: Optional[Distribution] = None
# Whether the installation process should try to uninstall an existing
# distribution before installing this requirement.
self.should_reinstall = False
# Temporary build location
self._temp_build_dir: Optional[TempDirectory] = None
# Set to True after successful installation
self.install_succeeded: Optional[bool] = None
# Supplied options
self.install_options = install_options if install_options else []
self.global_options = global_options if global_options else []
self.hash_options = hash_options if hash_options else {}
# Set to True after successful preparation of this requirement
self.prepared = False
# User supplied requirement are explicitly requested for installation
# by the user via CLI arguments or requirements files, as opposed to,
# e.g. dependencies, extras or constraints.
self.user_supplied = user_supplied
self.isolated = isolated
self.build_env: BuildEnvironment = NoOpBuildEnvironment()
# For PEP 517, the directory where we request the project metadata
# gets stored. We need this to pass to build_wheel, so the backend
# can ensure that the wheel matches the metadata (see the PEP for
# details).
self.metadata_directory: Optional[str] = None
# The static build requirements (from pyproject.toml)
self.pyproject_requires: Optional[List[str]] = None
# Build requirements that we will check are available
self.requirements_to_check: List[str] = []
# The PEP 517 backend we should use to build the project
self.pep517_backend: Optional[Pep517HookCaller] = None
# Are we using PEP 517 for this requirement?
# After pyproject.toml has been loaded, the only valid values are True
# and False. Before loading, None is valid (meaning "use the default").
# Setting an explicit value before loading pyproject.toml is supported,
# but after loading this flag should be treated as read only.
self.use_pep517 = use_pep517
# This requirement needs more preparation before it can be built
self.needs_more_preparation = False
def __str__(self) -> str:
if self.req:
s = str(self.req)
if self.link:
s += " from {}".format(redact_auth_from_url(self.link.url))
elif self.link:
s = redact_auth_from_url(self.link.url)
else:
s = "<InstallRequirement>"
if self.satisfied_by is not None:
s += " in {}".format(display_path(self.satisfied_by.location))
if self.comes_from:
if isinstance(self.comes_from, str):
comes_from: Optional[str] = self.comes_from
else:
comes_from = self.comes_from.from_path()
if comes_from:
s += f" (from {comes_from})"
return s
def __repr__(self) -> str:
return "<{} object: {} editable={!r}>".format(
self.__class__.__name__, str(self), self.editable
)
def format_debug(self) -> str:
"""An un-tested helper for getting state, for debugging."""
attributes = vars(self)
names = sorted(attributes)
state = ("{}={!r}".format(attr, attributes[attr]) for attr in sorted(names))
return "<{name} object: {{{state}}}>".format(
name=self.__class__.__name__,
state=", ".join(state),
)
# Things that are valid for all kinds of requirements?
@property
def name(self) -> Optional[str]:
if self.req is None:
return None
return pkg_resources.safe_name(self.req.name)
@functools.lru_cache() # use cached_property in python 3.8+
def supports_pyproject_editable(self) -> bool:
if not self.use_pep517:
return False
assert self.pep517_backend
with self.build_env:
runner = runner_with_spinner_message(
"Checking if build backend supports build_editable"
)
with self.pep517_backend.subprocess_runner(runner):
return "build_editable" in self.pep517_backend._supported_features()
@property
def specifier(self) -> SpecifierSet:
return self.req.specifier
@property
def is_pinned(self) -> bool:
"""Return whether I am pinned to an exact version.
For example, some-package==1.2 is pinned; some-package>1.2 is not.
"""
specifiers = self.specifier
return len(specifiers) == 1 and next(iter(specifiers)).operator in {"==", "==="}
def match_markers(self, extras_requested: Optional[Iterable[str]] = None) -> bool:
if not extras_requested:
# Provide an extra to safely evaluate the markers
# without matching any extra
extras_requested = ("",)
if self.markers is not None:
return any(
self.markers.evaluate({"extra": extra}) for extra in extras_requested
)
else:
return True
@property
def has_hash_options(self) -> bool:
"""Return whether any known-good hashes are specified as options.
These activate --require-hashes mode; hashes specified as part of a
URL do not.
"""
return bool(self.hash_options)
def hashes(self, trust_internet: bool = True) -> Hashes:
"""Return a hash-comparer that considers my option- and URL-based
hashes to be known-good.
Hashes in URLs--ones embedded in the requirements file, not ones
downloaded from an index server--are almost peers with ones from
flags. They satisfy --require-hashes (whether it was implicitly or
explicitly activated) but do not activate it. md5 and sha224 are not
allowed in flags, which should nudge people toward good algos. We
always OR all hashes together, even ones from URLs.
:param trust_internet: Whether to trust URL-based (#md5=...) hashes
downloaded from the internet, as by populate_link()
"""
good_hashes = self.hash_options.copy()
link = self.link if trust_internet else self.original_link
if link and link.hash:
good_hashes.setdefault(link.hash_name, []).append(link.hash)
return Hashes(good_hashes)
def from_path(self) -> Optional[str]:
"""Format a nice indicator to show where this "comes from" """
if self.req is None:
return None
s = str(self.req)
if self.comes_from:
if isinstance(self.comes_from, str):
comes_from = self.comes_from
else:
comes_from = self.comes_from.from_path()
if comes_from:
s += "->" + comes_from
return s
def ensure_build_location(
self, build_dir: str, autodelete: bool, parallel_builds: bool
) -> str:
assert build_dir is not None
if self._temp_build_dir is not None:
assert self._temp_build_dir.path
return self._temp_build_dir.path
if self.req is None:
# Some systems have /tmp as a symlink which confuses custom
# builds (such as numpy). Thus, we ensure that the real path
# is returned.
self._temp_build_dir = TempDirectory(
kind=tempdir_kinds.REQ_BUILD, globally_managed=True
)
return self._temp_build_dir.path
# This is the only remaining place where we manually determine the path
# for the temporary directory. It is only needed for editables where
# it is the value of the --src option.
# When parallel builds are enabled, add a UUID to the build directory
# name so multiple builds do not interfere with each other.
dir_name: str = canonicalize_name(self.name)
if parallel_builds:
dir_name = f"{dir_name}_{uuid.uuid4().hex}"
# FIXME: Is there a better place to create the build_dir? (hg and bzr
# need this)
if not os.path.exists(build_dir):
logger.debug("Creating directory %s", build_dir)
os.makedirs(build_dir)
actual_build_dir = os.path.join(build_dir, dir_name)
# `None` indicates that we respect the globally-configured deletion
# settings, which is what we actually want when auto-deleting.
delete_arg = None if autodelete else False
return TempDirectory(
path=actual_build_dir,
delete=delete_arg,
kind=tempdir_kinds.REQ_BUILD,
globally_managed=True,
).path
def _set_requirement(self) -> None:
"""Set requirement after generating metadata."""
assert self.req is None
assert self.metadata is not None
assert self.source_dir is not None
# Construct a Requirement object from the generated metadata
if isinstance(parse_version(self.metadata["Version"]), Version):
op = "=="
else:
op = "==="
self.req = Requirement(
"".join(
[
self.metadata["Name"],
op,
self.metadata["Version"],
]
)
)
def warn_on_mismatching_name(self) -> None:
metadata_name = canonicalize_name(self.metadata["Name"])
if canonicalize_name(self.req.name) == metadata_name:
# Everything is fine.
return
# If we're here, there's a mismatch. Log a warning about it.
logger.warning(
"Generating metadata for package %s "
"produced metadata for project name %s. Fix your "
"#egg=%s fragments.",
self.name,
metadata_name,
self.name,
)
self.req = Requirement(metadata_name)
def check_if_exists(self, use_user_site: bool) -> None:
"""Find an installed distribution that satisfies or conflicts
with this requirement, and set self.satisfied_by or
self.should_reinstall appropriately.
"""
if self.req is None:
return
existing_dist = get_distribution(self.req.name)
if not existing_dist:
return
# pkg_resouces may contain a different copy of packaging.version from
# pip in if the downstream distributor does a poor job debundling pip.
# We avoid existing_dist.parsed_version and let SpecifierSet.contains
# parses the version instead.
existing_version = existing_dist.version
version_compatible = (
existing_version is not None
and self.req.specifier.contains(existing_version, prereleases=True)
)
if not version_compatible:
self.satisfied_by = None
if use_user_site:
if dist_in_usersite(existing_dist):
self.should_reinstall = True
elif running_under_virtualenv() and dist_in_site_packages(
existing_dist
):
raise InstallationError(
"Will not install to the user site because it will "
"lack sys.path precedence to {} in {}".format(
existing_dist.project_name, existing_dist.location
)
)
elif dist_in_install_path(existing_dist):
self.should_reinstall = True
else:
if self.editable:
self.should_reinstall = True
# when installing editables, nothing pre-existing should ever
# satisfy
self.satisfied_by = None
else:
self.satisfied_by = existing_dist
# Things valid for wheels
@property
def is_wheel(self) -> bool:
if not self.link:
return False
return self.link.is_wheel
# Things valid for sdists
@property
def unpacked_source_directory(self) -> str:
return os.path.join(
self.source_dir, self.link and self.link.subdirectory_fragment or ""
)
@property
def setup_py_path(self) -> str:
assert self.source_dir, f"No source dir for {self}"
setup_py = os.path.join(self.unpacked_source_directory, "setup.py")
return setup_py
@property
def setup_cfg_path(self) -> str:
assert self.source_dir, f"No source dir for {self}"
setup_cfg = os.path.join(self.unpacked_source_directory, "setup.cfg")
return setup_cfg
@property
def pyproject_toml_path(self) -> str:
assert self.source_dir, f"No source dir for {self}"
return make_pyproject_path(self.unpacked_source_directory)
def load_pyproject_toml(self) -> None:
"""Load the pyproject.toml file.
After calling this routine, all of the attributes related to PEP 517
processing for this requirement have been set. In particular, the
use_pep517 attribute can be used to determine whether we should
follow the PEP 517 or legacy (setup.py) code path.
"""
pyproject_toml_data = load_pyproject_toml(
self.use_pep517, self.pyproject_toml_path, self.setup_py_path, str(self)
)
if pyproject_toml_data is None:
self.use_pep517 = False
return
self.use_pep517 = True
requires, backend, check, backend_path = pyproject_toml_data
self.requirements_to_check = check
self.pyproject_requires = requires
self.pep517_backend = Pep517HookCaller(
self.unpacked_source_directory,
backend,
backend_path=backend_path,
)
def isolated_editable_sanity_check(self) -> None:
"""Check that an editable requirement if valid for use with PEP 517/518.
This verifies that an editable that has a pyproject.toml either supports PEP 660
or as a setup.py or a setup.cfg
"""
if (
self.editable
and self.use_pep517
and not self.supports_pyproject_editable()
and not os.path.isfile(self.setup_py_path)
and not os.path.isfile(self.setup_cfg_path)
):
raise InstallationError(
f"Project {self} has a 'pyproject.toml' and its build "
f"backend is missing the 'build_editable' hook. Since it does not "
f"have a 'setup.py' nor a 'setup.cfg', "
f"it cannot be installed in editable mode. "
f"Consider using a build backend that supports PEP 660."
)
def prepare_metadata(self) -> None:
"""Ensure that project metadata is available.
Under PEP 517 and PEP 660, call the backend hook to prepare the metadata.
Under legacy processing, call setup.py egg-info.
"""
assert self.source_dir
if self.use_pep517:
assert self.pep517_backend is not None
if (
self.editable
and self.permit_editable_wheels
and self.supports_pyproject_editable()
):
self.metadata_directory = generate_editable_metadata(
build_env=self.build_env,
backend=self.pep517_backend,
)
else:
self.metadata_directory = generate_metadata(
build_env=self.build_env,
backend=self.pep517_backend,
)
else:
self.metadata_directory = generate_metadata_legacy(
build_env=self.build_env,
setup_py_path=self.setup_py_path,
source_dir=self.unpacked_source_directory,
isolated=self.isolated,
details=self.name or f"from {self.link}",
)
# Act on the newly generated metadata, based on the name and version.
if not self.name:
self._set_requirement()
else:
self.warn_on_mismatching_name()
self.assert_source_matches_version()
@property
def metadata(self) -> Any:
if not hasattr(self, "_metadata"):
self._metadata = get_metadata(self.get_dist())
return self._metadata
def get_dist(self) -> Distribution:
return _get_dist(self.metadata_directory)
def assert_source_matches_version(self) -> None:
assert self.source_dir
version = self.metadata["version"]
if self.req.specifier and version not in self.req.specifier:
logger.warning(
"Requested %s, but installing version %s",
self,
version,
)
else:
logger.debug(
"Source in %s has version %s, which satisfies requirement %s",
display_path(self.source_dir),
version,
self,
)
# For both source distributions and editables
def ensure_has_source_dir(
self,
parent_dir: str,
autodelete: bool = False,
parallel_builds: bool = False,
) -> None:
"""Ensure that a source_dir is set.
This will create a temporary build dir if the name of the requirement
isn't known yet.
:param parent_dir: The ideal pip parent_dir for the source_dir.
Generally src_dir for editables and build_dir for sdists.
:return: self.source_dir
"""
if self.source_dir is None:
self.source_dir = self.ensure_build_location(
parent_dir,
autodelete=autodelete,
parallel_builds=parallel_builds,
)
# For editable installations
def update_editable(self) -> None:
if not self.link:
logger.debug(
"Cannot update repository at %s; repository location is unknown",
self.source_dir,
)
return
assert self.editable
assert self.source_dir
if self.link.scheme == "file":
# Static paths don't get updated
return
vcs_backend = vcs.get_backend_for_scheme(self.link.scheme)
# Editable requirements are validated in Requirement constructors.
# So here, if it's neither a path nor a valid VCS URL, it's a bug.
assert vcs_backend, f"Unsupported VCS URL {self.link.url}"
hidden_url = hide_url(self.link.url)
vcs_backend.obtain(self.source_dir, url=hidden_url)
# Top-level Actions
def uninstall(
self, auto_confirm: bool = False, verbose: bool = False
) -> Optional[UninstallPathSet]:
"""
Uninstall the distribution currently satisfying this requirement.
Prompts before removing or modifying files unless
``auto_confirm`` is True.
Refuses to delete or modify files outside of ``sys.prefix`` -
thus uninstallation within a virtual environment can only
modify that virtual environment, even if the virtualenv is
linked to global site-packages.
"""
assert self.req
dist = get_distribution(self.req.name)
if not dist:
logger.warning("Skipping %s as it is not installed.", self.name)
return None
logger.info("Found existing installation: %s", dist)
uninstalled_pathset = UninstallPathSet.from_dist(dist)
uninstalled_pathset.remove(auto_confirm, verbose)
return uninstalled_pathset
def _get_archive_name(self, path: str, parentdir: str, rootdir: str) -> str:
def _clean_zip_name(name: str, prefix: str) -> str:
assert name.startswith(
prefix + os.path.sep
), f"name {name!r} doesn't start with prefix {prefix!r}"
name = name[len(prefix) + 1 :]
name = name.replace(os.path.sep, "/")
return name
path = os.path.join(parentdir, path)
name = _clean_zip_name(path, rootdir)
return self.name + "/" + name
def archive(self, build_dir: Optional[str]) -> None:
"""Saves archive to provided build_dir.
Used for saving downloaded VCS requirements as part of `pip download`.
"""
assert self.source_dir
if build_dir is None:
return
create_archive = True
archive_name = "{}-{}.zip".format(self.name, self.metadata["version"])
archive_path = os.path.join(build_dir, archive_name)
if os.path.exists(archive_path):
response = ask_path_exists(
"The file {} exists. (i)gnore, (w)ipe, "
"(b)ackup, (a)bort ".format(display_path(archive_path)),
("i", "w", "b", "a"),
)
if response == "i":
create_archive = False
elif response == "w":
logger.warning("Deleting %s", display_path(archive_path))
os.remove(archive_path)
elif response == "b":
dest_file = backup_dir(archive_path)
logger.warning(
"Backing up %s to %s",
display_path(archive_path),
display_path(dest_file),
)
shutil.move(archive_path, dest_file)
elif response == "a":
sys.exit(-1)
if not create_archive:
return
zip_output = zipfile.ZipFile(
archive_path,
"w",
zipfile.ZIP_DEFLATED,
allowZip64=True,
)
with zip_output:
dir = os.path.normcase(os.path.abspath(self.unpacked_source_directory))
for dirpath, dirnames, filenames in os.walk(dir):
for dirname in dirnames:
dir_arcname = self._get_archive_name(
dirname,
parentdir=dirpath,
rootdir=dir,
)
zipdir = zipfile.ZipInfo(dir_arcname + "/")
zipdir.external_attr = 0x1ED << 16 # 0o755
zip_output.writestr(zipdir, "")
for filename in filenames:
file_arcname = self._get_archive_name(
filename,
parentdir=dirpath,
rootdir=dir,
)
filename = os.path.join(dirpath, filename)
zip_output.write(filename, file_arcname)
logger.info("Saved %s", display_path(archive_path))
def install(
self,
install_options: List[str],
global_options: Optional[Sequence[str]] = None,
root: Optional[str] = None,
home: Optional[str] = None,
prefix: Optional[str] = None,
warn_script_location: bool = True,
use_user_site: bool = False,
pycompile: bool = True,
) -> None:
scheme = get_scheme(
self.name,
user=use_user_site,
home=home,
root=root,
isolated=self.isolated,
prefix=prefix,
)
global_options = global_options if global_options is not None else []
if self.editable and not self.is_wheel:
install_editable_legacy(
install_options,
global_options,
prefix=prefix,
home=home,
use_user_site=use_user_site,
name=self.name,
setup_py_path=self.setup_py_path,
isolated=self.isolated,
build_env=self.build_env,
unpacked_source_directory=self.unpacked_source_directory,
)
self.install_succeeded = True
return
if self.is_wheel:
assert self.local_file_path
direct_url = None
if self.editable:
direct_url = direct_url_for_editable(self.unpacked_source_directory)
elif self.original_link:
direct_url = direct_url_from_link(
self.original_link,
self.source_dir,
self.original_link_is_in_wheel_cache,
)
install_wheel(
self.name,
self.local_file_path,
scheme=scheme,
req_description=str(self.req),
pycompile=pycompile,
warn_script_location=warn_script_location,
direct_url=direct_url,
requested=self.user_supplied,
)
self.install_succeeded = True
return
# TODO: Why don't we do this for editable installs?
# Extend the list of global and install options passed on to
# the setup.py call with the ones from the requirements file.
# Options specified in requirements file override those
# specified on the command line, since the last option given
# to setup.py is the one that is used.
global_options = list(global_options) + self.global_options
install_options = list(install_options) + self.install_options
try:
success = install_legacy(
install_options=install_options,
global_options=global_options,
root=root,
home=home,
prefix=prefix,
use_user_site=use_user_site,
pycompile=pycompile,
scheme=scheme,
setup_py_path=self.setup_py_path,
isolated=self.isolated,
req_name=self.name,
build_env=self.build_env,
unpacked_source_directory=self.unpacked_source_directory,
req_description=str(self.req),
)
except LegacyInstallFailure as exc:
self.install_succeeded = False
raise exc.__cause__
except Exception:
self.install_succeeded = True
raise
self.install_succeeded = success
if success and self.legacy_install_reason == 8368:
deprecated(
reason=(
"{} was installed using the legacy 'setup.py install' "
"method, because a wheel could not be built for it.".format(
self.name
)
),
replacement="to fix the wheel build issue reported above",
gone_in=None,
issue=8368,
)
def check_invalid_constraint_type(req: InstallRequirement) -> str:
# Check for unsupported forms
problem = ""
if not req.name:
problem = "Unnamed requirements are not allowed as constraints"
elif req.editable:
problem = "Editable requirements are not allowed as constraints"
elif req.extras:
problem = "Constraints cannot have extras"
if problem:
deprecated(
reason=(
"Constraints are only allowed to take the form of a package "
"name and a version specifier. Other forms were originally "
"permitted as an accident of the implementation, but were "
"undocumented. The new implementation of the resolver no "
"longer supports these forms."
),
replacement="replacing the constraint with a requirement",
# No plan yet for when the new resolver becomes default
gone_in=None,
issue=8210,
)
return problem
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