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pip
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cli
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req_command.py
"""Contains the Command base classes that depend on PipSession. The classes in this module are in a separate module so the commands not needing download / PackageFinder capability don't unnecessarily import the PackageFinder machinery and all its vendored dependencies, etc. """ # The following comment should be removed at some point in the future. # mypy: disallow-untyped-defs=False import os from functools import partial from pip._internal.cli.base_command import Command from pip._internal.cli.command_context import CommandContextMixIn from pip._internal.exceptions import CommandError from pip._internal.index import PackageFinder from pip._internal.legacy_resolve import Resolver from pip._internal.models.selection_prefs import SelectionPreferences from pip._internal.network.session import PipSession from pip._internal.operations.prepare import RequirementPreparer from pip._internal.req.constructors import ( install_req_from_editable, install_req_from_line, install_req_from_req_string, ) from pip._internal.req.req_file import parse_requirements from pip._internal.self_outdated_check import ( make_link_collector, pip_self_version_check, ) from pip._internal.utils.misc import normalize_path from pip._internal.utils.typing import MYPY_CHECK_RUNNING if MYPY_CHECK_RUNNING: from optparse import Values from typing import List, Optional, Tuple from pip._internal.cache import WheelCache from pip._internal.models.target_python import TargetPython from pip._internal.req.req_set import RequirementSet from pip._internal.req.req_tracker import RequirementTracker from pip._internal.utils.temp_dir import TempDirectory class SessionCommandMixin(CommandContextMixIn): """ A class mixin for command classes needing _build_session(). """ def __init__(self): super(SessionCommandMixin, self).__init__() self._session = None # Optional[PipSession] @classmethod def _get_index_urls(cls, options): """Return a list of index urls from user-provided options.""" index_urls = [] if not getattr(options, "no_index", False): url = getattr(options, "index_url", None) if url: index_urls.append(url) urls = getattr(options, "extra_index_urls", None) if urls: index_urls.extend(urls) # Return None rather than an empty list return index_urls or None def get_default_session(self, options): # type: (Values) -> PipSession """Get a default-managed session.""" if self._session is None: self._session = self.enter_context(self._build_session(options)) return self._session def _build_session(self, options, retries=None, timeout=None): # type: (Values, Optional[int], Optional[int]) -> PipSession session = PipSession( cache=( normalize_path(os.path.join(options.cache_dir, "http")) if options.cache_dir else None ), retries=retries if retries is not None else options.retries, trusted_hosts=options.trusted_hosts, index_urls=self._get_index_urls(options), ) # Handle custom ca-bundles from the user if options.cert: session.verify = options.cert # Handle SSL client certificate if options.client_cert: session.cert = options.client_cert # Handle timeouts if options.timeout or timeout: session.timeout = ( timeout if timeout is not None else options.timeout ) # Handle configured proxies if options.proxy: session.proxies = { "http": options.proxy, "https": options.proxy, } # Determine if we can prompt the user for authentication or not session.auth.prompting = not options.no_input return session class IndexGroupCommand(Command, SessionCommandMixin): """ Abstract base class for commands with the index_group options. This also corresponds to the commands that permit the pip version check. """ def handle_pip_version_check(self, options): # type: (Values) -> None """ Do the pip version check if not disabled. This overrides the default behavior of not doing the check. """ # Make sure the index_group options are present. assert hasattr(options, 'no_index') if options.disable_pip_version_check or options.no_index: return # Otherwise, check if we're using the latest version of pip available. session = self._build_session( options, retries=0, timeout=min(5, options.timeout) ) with session: pip_self_version_check(session, options) class RequirementCommand(IndexGroupCommand): @staticmethod def make_requirement_preparer( temp_build_dir, # type: TempDirectory options, # type: Values req_tracker, # type: RequirementTracker download_dir=None, # type: str wheel_download_dir=None, # type: str ): # type: (...) -> RequirementPreparer """ Create a RequirementPreparer instance for the given parameters. """ temp_build_dir_path = temp_build_dir.path assert temp_build_dir_path is not None return RequirementPreparer( build_dir=temp_build_dir_path, src_dir=options.src_dir, download_dir=download_dir, wheel_download_dir=wheel_download_dir, progress_bar=options.progress_bar, build_isolation=options.build_isolation, req_tracker=req_tracker, ) @staticmethod def make_resolver( preparer, # type: RequirementPreparer session, # type: PipSession finder, # type: PackageFinder options, # type: Values wheel_cache=None, # type: Optional[WheelCache] use_user_site=False, # type: bool ignore_installed=True, # type: bool ignore_requires_python=False, # type: bool force_reinstall=False, # type: bool upgrade_strategy="to-satisfy-only", # type: str use_pep517=None, # type: Optional[bool] py_version_info=None # type: Optional[Tuple[int, ...]] ): # type: (...) -> Resolver """ Create a Resolver instance for the given parameters. """ make_install_req = partial( install_req_from_req_string, isolated=options.isolated_mode, wheel_cache=wheel_cache, use_pep517=use_pep517, ) return Resolver( preparer=preparer, session=session, finder=finder, make_install_req=make_install_req, use_user_site=use_user_site, ignore_dependencies=options.ignore_dependencies, ignore_installed=ignore_installed, ignore_requires_python=ignore_requires_python, force_reinstall=force_reinstall, upgrade_strategy=upgrade_strategy, py_version_info=py_version_info ) def populate_requirement_set( self, requirement_set, # type: RequirementSet args, # type: List[str] options, # type: Values finder, # type: PackageFinder session, # type: PipSession wheel_cache, # type: Optional[WheelCache] ): # type: (...) -> None """ Marshal cmd line args into a requirement set. """ # NOTE: As a side-effect, options.require_hashes and # requirement_set.require_hashes may be updated for filename in options.constraints: for req_to_add in parse_requirements( filename, constraint=True, finder=finder, options=options, session=session, wheel_cache=wheel_cache): req_to_add.is_direct = True requirement_set.add_requirement(req_to_add) for req in args: req_to_add = install_req_from_line( req, None, isolated=options.isolated_mode, use_pep517=options.use_pep517, wheel_cache=wheel_cache ) req_to_add.is_direct = True requirement_set.add_requirement(req_to_add) for req in options.editables: req_to_add = install_req_from_editable( req, isolated=options.isolated_mode, use_pep517=options.use_pep517, wheel_cache=wheel_cache ) req_to_add.is_direct = True requirement_set.add_requirement(req_to_add) for filename in options.requirements: for req_to_add in parse_requirements( filename, finder=finder, options=options, session=session, wheel_cache=wheel_cache, use_pep517=options.use_pep517): req_to_add.is_direct = True requirement_set.add_requirement(req_to_add) # If --require-hashes was a line in a requirements file, tell # RequirementSet about it: requirement_set.require_hashes = options.require_hashes if not (args or options.editables or options.requirements): opts = {'name': self.name} if options.find_links: raise CommandError( 'You must give at least one requirement to %(name)s ' '(maybe you meant "pip %(name)s %(links)s"?)' % dict(opts, links=' '.join(options.find_links))) else: raise CommandError( 'You must give at least one requirement to %(name)s ' '(see "pip help %(name)s")' % opts) def _build_package_finder( self, options, # type: Values session, # type: PipSession target_python=None, # type: Optional[TargetPython] ignore_requires_python=None, # type: Optional[bool] ): # type: (...) -> PackageFinder """ Create a package finder appropriate to this requirement command. :param ignore_requires_python: Whether to ignore incompatible "Requires-Python" values in links. Defaults to False. """ link_collector = make_link_collector(session, options=options) selection_prefs = SelectionPreferences( allow_yanked=True, format_control=options.format_control, allow_all_prereleases=options.pre, prefer_binary=options.prefer_binary, ignore_requires_python=ignore_requires_python, ) return PackageFinder.create( link_collector=link_collector, selection_prefs=selection_prefs, target_python=target_python, )
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