mirror of https://github.com/pypa/pip
454 lines
16 KiB
Python
454 lines
16 KiB
Python
"""Contains the Command base classes that depend on PipSession.
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The classes in this module are in a separate module so the commands not
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needing download / PackageFinder capability don't unnecessarily import the
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PackageFinder machinery and all its vendored dependencies, etc.
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"""
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import logging
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import os
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import sys
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from functools import partial
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from optparse import Values
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from typing import Any, List, Optional, Tuple
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from pip._internal.cache import WheelCache
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from pip._internal.cli import cmdoptions
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from pip._internal.cli.base_command import Command
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from pip._internal.cli.command_context import CommandContextMixIn
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from pip._internal.exceptions import CommandError, PreviousBuildDirError
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from pip._internal.index.collector import LinkCollector
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from pip._internal.index.package_finder import PackageFinder
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from pip._internal.models.selection_prefs import SelectionPreferences
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from pip._internal.models.target_python import TargetPython
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from pip._internal.network.session import PipSession
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from pip._internal.operations.prepare import RequirementPreparer
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from pip._internal.req.constructors import (
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install_req_from_editable,
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install_req_from_line,
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install_req_from_parsed_requirement,
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install_req_from_req_string,
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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_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.self_outdated_check import pip_self_version_check
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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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tempdir_kinds,
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)
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from pip._internal.utils.virtualenv import running_under_virtualenv
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logger = logging.getLogger(__name__)
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class SessionCommandMixin(CommandContextMixIn):
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"""
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A class mixin for command classes needing _build_session().
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"""
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def __init__(self) -> None:
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super().__init__()
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self._session: Optional[PipSession] = None
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@classmethod
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def _get_index_urls(cls, options: Values) -> Optional[List[str]]:
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"""Return a list of index urls from user-provided options."""
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index_urls = []
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if not getattr(options, "no_index", False):
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url = getattr(options, "index_url", None)
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if url:
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index_urls.append(url)
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urls = getattr(options, "extra_index_urls", None)
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if urls:
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index_urls.extend(urls)
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# Return None rather than an empty list
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return index_urls or None
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def get_default_session(self, options: Values) -> PipSession:
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"""Get a default-managed session."""
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if self._session is None:
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self._session = self.enter_context(self._build_session(options))
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# there's no type annotation on requests.Session, so it's
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# automatically ContextManager[Any] and self._session becomes Any,
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# then https://github.com/python/mypy/issues/7696 kicks in
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assert self._session is not None
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return self._session
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def _build_session(
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self,
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options: Values,
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retries: Optional[int] = None,
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timeout: Optional[int] = None,
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) -> PipSession:
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assert not options.cache_dir or os.path.isabs(options.cache_dir)
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session = PipSession(
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cache=(
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os.path.join(options.cache_dir, "http") if options.cache_dir else None
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),
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retries=retries if retries is not None else options.retries,
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trusted_hosts=options.trusted_hosts,
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index_urls=self._get_index_urls(options),
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)
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# Handle custom ca-bundles from the user
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if options.cert:
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session.verify = options.cert
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# Handle SSL client certificate
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if options.client_cert:
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session.cert = options.client_cert
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# Handle timeouts
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if options.timeout or timeout:
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session.timeout = timeout if timeout is not None else options.timeout
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# Handle configured proxies
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if options.proxy:
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session.proxies = {
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"http": options.proxy,
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"https": options.proxy,
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}
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# Determine if we can prompt the user for authentication or not
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session.auth.prompting = not options.no_input
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return session
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class IndexGroupCommand(Command, SessionCommandMixin):
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"""
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Abstract base class for commands with the index_group options.
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This also corresponds to the commands that permit the pip version check.
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"""
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def handle_pip_version_check(self, options: Values) -> None:
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"""
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Do the pip version check if not disabled.
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This overrides the default behavior of not doing the check.
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"""
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# Make sure the index_group options are present.
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assert hasattr(options, "no_index")
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if options.disable_pip_version_check or options.no_index:
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return
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# Otherwise, check if we're using the latest version of pip available.
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session = self._build_session(
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options, retries=0, timeout=min(5, options.timeout)
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)
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with session:
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pip_self_version_check(session, options)
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KEEPABLE_TEMPDIR_TYPES = [
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tempdir_kinds.BUILD_ENV,
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tempdir_kinds.EPHEM_WHEEL_CACHE,
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tempdir_kinds.REQ_BUILD,
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]
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def warn_if_run_as_root() -> None:
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"""Output a warning for sudo users on Unix.
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In a virtual environment, sudo pip still writes to virtualenv.
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On Windows, users may run pip as Administrator without issues.
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This warning only applies to Unix root users outside of virtualenv.
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"""
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if running_under_virtualenv():
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return
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if not hasattr(os, "getuid"):
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return
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# On Windows, there are no "system managed" Python packages. Installing as
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# Administrator via pip is the correct way of updating system environments.
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#
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# We choose sys.platform over utils.compat.WINDOWS here to enable Mypy platform
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# checks: https://mypy.readthedocs.io/en/stable/common_issues.html
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if sys.platform == "win32" or sys.platform == "cygwin":
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return
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if sys.platform == "darwin" or sys.platform == "linux":
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if os.getuid() != 0:
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return
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logger.warning(
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"Running pip as the 'root' user can result in broken permissions and "
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"conflicting behaviour with the system package manager. "
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"It is recommended to use a virtual environment instead: "
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"https://pip.pypa.io/warnings/venv"
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)
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def with_cleanup(func: Any) -> Any:
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"""Decorator for common logic related to managing temporary
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directories.
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"""
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def configure_tempdir_registry(registry: TempDirectoryTypeRegistry) -> None:
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for t in KEEPABLE_TEMPDIR_TYPES:
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registry.set_delete(t, False)
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def wrapper(
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self: RequirementCommand, options: Values, args: List[Any]
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) -> Optional[int]:
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assert self.tempdir_registry is not None
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if options.no_clean:
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configure_tempdir_registry(self.tempdir_registry)
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try:
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return func(self, options, args)
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except PreviousBuildDirError:
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# This kind of conflict can occur when the user passes an explicit
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# build directory with a pre-existing folder. In that case we do
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# not want to accidentally remove it.
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configure_tempdir_registry(self.tempdir_registry)
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raise
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return wrapper
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class RequirementCommand(IndexGroupCommand):
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def __init__(self, *args: Any, **kw: Any) -> None:
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super().__init__(*args, **kw)
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self.cmd_opts.add_option(cmdoptions.no_clean())
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@staticmethod
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def determine_resolver_variant(options: Values) -> str:
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"""Determines which resolver should be used, based on the given options."""
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if "legacy-resolver" in options.deprecated_features_enabled:
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return "legacy"
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return "2020-resolver"
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@classmethod
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def make_requirement_preparer(
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cls,
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temp_build_dir: TempDirectory,
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options: Values,
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req_tracker: RequirementTracker,
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session: PipSession,
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finder: PackageFinder,
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use_user_site: bool,
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download_dir: Optional[str] = None,
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) -> RequirementPreparer:
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"""
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Create a RequirementPreparer instance for the given parameters.
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"""
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temp_build_dir_path = temp_build_dir.path
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assert temp_build_dir_path is not None
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resolver_variant = cls.determine_resolver_variant(options)
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if resolver_variant == "2020-resolver":
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lazy_wheel = "fast-deps" in options.features_enabled
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if lazy_wheel:
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logger.warning(
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"pip is using lazily downloaded wheels using HTTP "
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"range requests to obtain dependency information. "
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"This experimental feature is enabled through "
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"--use-feature=fast-deps and it is not ready for "
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"production."
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)
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else:
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lazy_wheel = False
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if "fast-deps" in options.features_enabled:
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logger.warning(
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"fast-deps has no effect when used with the legacy resolver."
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)
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return RequirementPreparer(
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build_dir=temp_build_dir_path,
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src_dir=options.src_dir,
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download_dir=download_dir,
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build_isolation=options.build_isolation,
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req_tracker=req_tracker,
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session=session,
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progress_bar=options.progress_bar,
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finder=finder,
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require_hashes=options.require_hashes,
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use_user_site=use_user_site,
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lazy_wheel=lazy_wheel,
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in_tree_build="in-tree-build" in options.features_enabled,
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)
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@classmethod
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def make_resolver(
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cls,
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preparer: RequirementPreparer,
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finder: PackageFinder,
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options: Values,
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wheel_cache: Optional[WheelCache] = None,
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use_user_site: bool = False,
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ignore_installed: bool = True,
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ignore_requires_python: bool = False,
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force_reinstall: bool = False,
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upgrade_strategy: str = "to-satisfy-only",
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use_pep517: Optional[bool] = None,
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py_version_info: Optional[Tuple[int, ...]] = None,
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) -> 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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make_install_req = partial(
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install_req_from_req_string,
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isolated=options.isolated_mode,
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use_pep517=use_pep517,
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)
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resolver_variant = cls.determine_resolver_variant(options)
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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_variant == "2020-resolver":
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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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wheel_cache=wheel_cache,
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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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wheel_cache=wheel_cache,
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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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def get_requirements(
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self,
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args: List[str],
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options: Values,
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finder: PackageFinder,
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session: PipSession,
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) -> List[InstallRequirement]:
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"""
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Parse command-line arguments into the corresponding requirements.
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"""
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requirements = [] # type: List[InstallRequirement]
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for filename in options.constraints:
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for parsed_req in parse_requirements(
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filename,
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constraint=True,
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finder=finder,
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options=options,
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session=session,
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):
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req_to_add = install_req_from_parsed_requirement(
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parsed_req,
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isolated=options.isolated_mode,
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user_supplied=False,
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)
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requirements.append(req_to_add)
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for req in args:
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req_to_add = install_req_from_line(
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req,
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None,
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isolated=options.isolated_mode,
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use_pep517=options.use_pep517,
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user_supplied=True,
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)
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requirements.append(req_to_add)
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for req in options.editables:
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req_to_add = install_req_from_editable(
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req,
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user_supplied=True,
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isolated=options.isolated_mode,
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use_pep517=options.use_pep517,
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)
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requirements.append(req_to_add)
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# NOTE: options.require_hashes may be set if --require-hashes is True
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for filename in options.requirements:
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for parsed_req in parse_requirements(
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filename, finder=finder, options=options, session=session
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):
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req_to_add = install_req_from_parsed_requirement(
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parsed_req,
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isolated=options.isolated_mode,
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use_pep517=options.use_pep517,
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user_supplied=True,
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)
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requirements.append(req_to_add)
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# If any requirement has hash options, enable hash checking.
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if any(req.has_hash_options for req in requirements):
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options.require_hashes = True
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if not (args or options.editables or options.requirements):
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opts = {"name": self.name}
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if options.find_links:
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raise CommandError(
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"You must give at least one requirement to {name} "
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'(maybe you meant "pip {name} {links}"?)'.format(
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**dict(opts, links=" ".join(options.find_links))
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)
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)
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else:
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raise CommandError(
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"You must give at least one requirement to {name} "
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'(see "pip help {name}")'.format(**opts)
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)
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return requirements
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@staticmethod
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def trace_basic_info(finder: PackageFinder) -> None:
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"""
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Trace basic information about the provided objects.
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"""
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# Display where finder is looking for packages
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search_scope = finder.search_scope
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locations = search_scope.get_formatted_locations()
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if locations:
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logger.info(locations)
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def _build_package_finder(
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self,
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options: Values,
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session: PipSession,
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target_python: Optional[TargetPython] = None,
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ignore_requires_python: Optional[bool] = None,
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) -> PackageFinder:
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"""
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Create a package finder appropriate to this requirement command.
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:param ignore_requires_python: Whether to ignore incompatible
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"Requires-Python" values in links. Defaults to False.
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"""
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link_collector = LinkCollector.create(session, options=options)
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selection_prefs = SelectionPreferences(
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allow_yanked=True,
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format_control=options.format_control,
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allow_all_prereleases=options.pre,
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prefer_binary=options.prefer_binary,
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ignore_requires_python=ignore_requires_python,
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)
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return PackageFinder.create(
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link_collector=link_collector,
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selection_prefs=selection_prefs,
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target_python=target_python,
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)
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