mirror of https://github.com/pypa/pip
Add --unstable-feature=resolver
This introduces a new general option --unstable-feature that can be used to opt into "preview" features in pip not enabled by default. Currently the only available feature is "resolver". A stub resolver interface (which would fail on invocation) is provided to respond to the flag. The --unstable-feature option is hidden from --help since the resolver does not yet work. This suppression should be removed when we release the resolver for general/public testing.
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@ -915,6 +915,19 @@ no_python_version_warning = partial(
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) # type: Callable[..., Option]
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unstable_feature = partial(
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Option,
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'--unstable-feature',
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dest='unstable_features',
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metavar='feature',
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action='append',
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default=[],
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choices=['resolver'],
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help=SUPPRESS_HELP, # TODO: Enable this when the resolver actually works.
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# help='Enable unstable feature(s) that may be backward incompatible.',
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) # type: Callable[..., Option]
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##########
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# groups #
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##########
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@ -943,6 +956,7 @@ general_group = {
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disable_pip_version_check,
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no_color,
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no_python_version_warning,
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unstable_feature,
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]
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} # type: Dict[str, Any]
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@ -26,7 +26,6 @@ from pip._internal.req.constructors import (
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)
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from pip._internal.req.req_file import parse_requirements
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from pip._internal.req.req_set import RequirementSet
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from pip._internal.resolution.legacy.resolver import Resolver
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from pip._internal.self_outdated_check import (
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make_link_collector,
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pip_self_version_check,
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@ -42,6 +41,7 @@ if MYPY_CHECK_RUNNING:
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from pip._internal.models.target_python import TargetPython
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from pip._internal.req.req_install import InstallRequirement
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from pip._internal.req.req_tracker import RequirementTracker
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from pip._internal.resolution.base import BaseResolver
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from pip._internal.utils.temp_dir import (
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TempDirectory,
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TempDirectoryTypeRegistry,
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@ -248,7 +248,7 @@ class RequirementCommand(IndexGroupCommand):
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use_pep517=None, # type: Optional[bool]
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py_version_info=None # type: Optional[Tuple[int, ...]]
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):
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# type: (...) -> Resolver
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# type: (...) -> BaseResolver
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"""
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Create a Resolver instance for the given parameters.
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"""
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@ -258,7 +258,25 @@ class RequirementCommand(IndexGroupCommand):
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wheel_cache=wheel_cache,
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use_pep517=use_pep517,
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)
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return Resolver(
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# The long import name and duplicated invocation is needed to convince
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# Mypy into correctly typechecking. Otherwise it would complain the
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# "Resolver" class being redefined.
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if 'resolver' in options.unstable_features:
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import pip._internal.resolution.resolvelib.resolver
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return pip._internal.resolution.resolvelib.resolver.Resolver(
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preparer=preparer,
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finder=finder,
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make_install_req=make_install_req,
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use_user_site=use_user_site,
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ignore_dependencies=options.ignore_dependencies,
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ignore_installed=ignore_installed,
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ignore_requires_python=ignore_requires_python,
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force_reinstall=force_reinstall,
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upgrade_strategy=upgrade_strategy,
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py_version_info=py_version_info,
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)
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import pip._internal.resolution.legacy.resolver
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return pip._internal.resolution.legacy.resolver.Resolver(
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preparer=preparer,
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finder=finder,
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make_install_req=make_install_req,
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@ -0,0 +1,20 @@
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from pip._internal.utils.typing import MYPY_CHECK_RUNNING
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if MYPY_CHECK_RUNNING:
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from typing import Callable, List
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from pip._internal.req.req_install import InstallRequirement
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from pip._internal.req.req_set import RequirementSet
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InstallRequirementProvider = Callable[
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[str, InstallRequirement], InstallRequirement
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]
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class BaseResolver(object):
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def resolve(self, root_reqs, check_supported_wheels):
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# type: (List[InstallRequirement], bool) -> RequirementSet
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raise NotImplementedError()
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def get_installation_order(self, req_set):
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# type: (RequirementSet) -> List[InstallRequirement]
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raise NotImplementedError()
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@ -29,6 +29,7 @@ from pip._internal.exceptions import (
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UnsupportedPythonVersion,
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)
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from pip._internal.req.req_set import RequirementSet
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from pip._internal.resolution.base import BaseResolver
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from pip._internal.utils.logging import indent_log
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from pip._internal.utils.misc import dist_in_usersite, normalize_version_info
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from pip._internal.utils.packaging import (
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@ -38,17 +39,15 @@ from pip._internal.utils.packaging import (
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from pip._internal.utils.typing import MYPY_CHECK_RUNNING
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if MYPY_CHECK_RUNNING:
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from typing import Callable, DefaultDict, List, Optional, Set, Tuple
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from typing import DefaultDict, List, Optional, Set, Tuple
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from pip._vendor import pkg_resources
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from pip._internal.distributions import AbstractDistribution
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from pip._internal.index.package_finder import PackageFinder
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from pip._internal.operations.prepare import RequirementPreparer
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from pip._internal.req.req_install import InstallRequirement
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from pip._internal.resolution.base import InstallRequirementProvider
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InstallRequirementProvider = Callable[
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[str, InstallRequirement], InstallRequirement
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]
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DiscoveredDependencies = DefaultDict[str, List[InstallRequirement]]
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logger = logging.getLogger(__name__)
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@ -102,7 +101,7 @@ def _check_dist_requires_python(
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))
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class Resolver(object):
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class Resolver(BaseResolver):
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"""Resolves which packages need to be installed/uninstalled to perform \
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the requested operation without breaking the requirements of any package.
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"""
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@ -0,0 +1,36 @@
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from pip._internal.resolution.base import BaseResolver
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from pip._internal.utils.typing import MYPY_CHECK_RUNNING
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if MYPY_CHECK_RUNNING:
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from typing import List, Optional, Tuple
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from pip._internal.index.package_finder import PackageFinder
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from pip._internal.operations.prepare import RequirementPreparer
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from pip._internal.req.req_install import InstallRequirement
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from pip._internal.req.req_set import RequirementSet
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from pip._internal.resolution.base import InstallRequirementProvider
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class Resolver(BaseResolver):
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def __init__(
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self,
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preparer, # type: RequirementPreparer
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finder, # type: PackageFinder
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make_install_req, # type: InstallRequirementProvider
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use_user_site, # type: bool
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ignore_dependencies, # type: bool
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ignore_installed, # type: bool
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ignore_requires_python, # type: bool
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force_reinstall, # type: bool
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upgrade_strategy, # type: str
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py_version_info=None, # type: Optional[Tuple[int, ...]]
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):
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super(Resolver, self).__init__()
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def resolve(self, root_reqs, check_supported_wheels):
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# type: (List[InstallRequirement], bool) -> RequirementSet
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raise NotImplementedError()
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def get_installation_order(self, req_set):
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# type: (RequirementSet) -> List[InstallRequirement]
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raise NotImplementedError()
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