737 lines
27 KiB
Python
737 lines
27 KiB
Python
from __future__ import absolute_import
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import errno
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import logging
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import operator
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import os
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import shutil
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import site
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from optparse import SUPPRESS_HELP
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from pip._vendor import pkg_resources
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from pip._vendor.packaging.utils import canonicalize_name
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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.cmdoptions import make_target_python
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from pip._internal.cli.req_command import RequirementCommand, with_cleanup
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from pip._internal.cli.status_codes import ERROR, SUCCESS
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from pip._internal.exceptions import CommandError, InstallationError
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from pip._internal.locations import distutils_scheme
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from pip._internal.operations.check import check_install_conflicts
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from pip._internal.req import install_given_reqs
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from pip._internal.req.req_tracker import get_requirement_tracker
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from pip._internal.utils.distutils_args import parse_distutils_args
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from pip._internal.utils.filesystem import test_writable_dir
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from pip._internal.utils.misc import (
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ensure_dir,
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get_installed_version,
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get_pip_version,
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protect_pip_from_modification_on_windows,
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write_output,
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)
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from pip._internal.utils.temp_dir import TempDirectory
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from pip._internal.utils.typing import MYPY_CHECK_RUNNING
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from pip._internal.utils.virtualenv import virtualenv_no_global
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from pip._internal.wheel_builder import build, should_build_for_install_command
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if MYPY_CHECK_RUNNING:
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from optparse import Values
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from typing import Iterable, List, Optional
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from pip._internal.models.format_control import FormatControl
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from pip._internal.operations.check import ConflictDetails
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from pip._internal.req.req_install import InstallRequirement
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from pip._internal.wheel_builder import BinaryAllowedPredicate
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logger = logging.getLogger(__name__)
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def get_check_binary_allowed(format_control):
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# type: (FormatControl) -> BinaryAllowedPredicate
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def check_binary_allowed(req):
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# type: (InstallRequirement) -> bool
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if req.use_pep517:
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return True
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canonical_name = canonicalize_name(req.name)
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allowed_formats = format_control.get_allowed_formats(canonical_name)
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return "binary" in allowed_formats
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return check_binary_allowed
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class InstallCommand(RequirementCommand):
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"""
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Install packages from:
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- PyPI (and other indexes) using requirement specifiers.
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- VCS project urls.
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- Local project directories.
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- Local or remote source archives.
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pip also supports installing from "requirements files", which provide
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an easy way to specify a whole environment to be installed.
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"""
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usage = """
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%prog [options] <requirement specifier> [package-index-options] ...
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%prog [options] -r <requirements file> [package-index-options] ...
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%prog [options] [-e] <vcs project url> ...
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%prog [options] [-e] <local project path> ...
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%prog [options] <archive url/path> ..."""
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def add_options(self):
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# type: () -> None
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self.cmd_opts.add_option(cmdoptions.requirements())
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self.cmd_opts.add_option(cmdoptions.constraints())
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self.cmd_opts.add_option(cmdoptions.no_deps())
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self.cmd_opts.add_option(cmdoptions.pre())
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self.cmd_opts.add_option(cmdoptions.editable())
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self.cmd_opts.add_option(
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'-t', '--target',
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dest='target_dir',
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metavar='dir',
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default=None,
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help='Install packages into <dir>. '
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'By default this will not replace existing files/folders in '
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'<dir>. Use --upgrade to replace existing packages in <dir> '
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'with new versions.'
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)
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cmdoptions.add_target_python_options(self.cmd_opts)
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self.cmd_opts.add_option(
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'--user',
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dest='use_user_site',
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action='store_true',
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help="Install to the Python user install directory for your "
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"platform. Typically ~/.local/, or %APPDATA%\\Python on "
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"Windows. (See the Python documentation for site.USER_BASE "
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"for full details.)")
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self.cmd_opts.add_option(
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'--no-user',
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dest='use_user_site',
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action='store_false',
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help=SUPPRESS_HELP)
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self.cmd_opts.add_option(
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'--root',
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dest='root_path',
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metavar='dir',
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default=None,
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help="Install everything relative to this alternate root "
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"directory.")
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self.cmd_opts.add_option(
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'--prefix',
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dest='prefix_path',
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metavar='dir',
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default=None,
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help="Installation prefix where lib, bin and other top-level "
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"folders are placed")
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self.cmd_opts.add_option(cmdoptions.build_dir())
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self.cmd_opts.add_option(cmdoptions.src())
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self.cmd_opts.add_option(
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'-U', '--upgrade',
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dest='upgrade',
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action='store_true',
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help='Upgrade all specified packages to the newest available '
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'version. The handling of dependencies depends on the '
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'upgrade-strategy used.'
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)
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self.cmd_opts.add_option(
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'--upgrade-strategy',
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dest='upgrade_strategy',
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default='only-if-needed',
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choices=['only-if-needed', 'eager'],
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help='Determines how dependency upgrading should be handled '
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'[default: %default]. '
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'"eager" - dependencies are upgraded regardless of '
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'whether the currently installed version satisfies the '
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'requirements of the upgraded package(s). '
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'"only-if-needed" - are upgraded only when they do not '
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'satisfy the requirements of the upgraded package(s).'
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)
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self.cmd_opts.add_option(
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'--force-reinstall',
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dest='force_reinstall',
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action='store_true',
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help='Reinstall all packages even if they are already '
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'up-to-date.')
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self.cmd_opts.add_option(
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'-I', '--ignore-installed',
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dest='ignore_installed',
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action='store_true',
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help='Ignore the installed packages, overwriting them. '
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'This can break your system if the existing package '
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'is of a different version or was installed '
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'with a different package manager!'
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)
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self.cmd_opts.add_option(cmdoptions.ignore_requires_python())
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self.cmd_opts.add_option(cmdoptions.no_build_isolation())
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self.cmd_opts.add_option(cmdoptions.use_pep517())
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self.cmd_opts.add_option(cmdoptions.no_use_pep517())
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self.cmd_opts.add_option(cmdoptions.install_options())
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self.cmd_opts.add_option(cmdoptions.global_options())
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self.cmd_opts.add_option(
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"--compile",
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action="store_true",
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dest="compile",
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default=True,
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help="Compile Python source files to bytecode",
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)
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self.cmd_opts.add_option(
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"--no-compile",
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action="store_false",
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dest="compile",
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help="Do not compile Python source files to bytecode",
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)
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self.cmd_opts.add_option(
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"--no-warn-script-location",
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action="store_false",
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dest="warn_script_location",
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default=True,
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help="Do not warn when installing scripts outside PATH",
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)
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self.cmd_opts.add_option(
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"--no-warn-conflicts",
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action="store_false",
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dest="warn_about_conflicts",
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default=True,
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help="Do not warn about broken dependencies",
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)
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self.cmd_opts.add_option(cmdoptions.no_binary())
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self.cmd_opts.add_option(cmdoptions.only_binary())
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self.cmd_opts.add_option(cmdoptions.prefer_binary())
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self.cmd_opts.add_option(cmdoptions.require_hashes())
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self.cmd_opts.add_option(cmdoptions.progress_bar())
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index_opts = cmdoptions.make_option_group(
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cmdoptions.index_group,
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self.parser,
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)
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self.parser.insert_option_group(0, index_opts)
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self.parser.insert_option_group(0, self.cmd_opts)
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@with_cleanup
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def run(self, options, args):
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# type: (Values, List[str]) -> int
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if options.use_user_site and options.target_dir is not None:
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raise CommandError("Can not combine '--user' and '--target'")
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cmdoptions.check_install_build_global(options)
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upgrade_strategy = "to-satisfy-only"
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if options.upgrade:
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upgrade_strategy = options.upgrade_strategy
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cmdoptions.check_dist_restriction(options, check_target=True)
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install_options = options.install_options or []
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logger.debug("Using %s", get_pip_version())
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options.use_user_site = decide_user_install(
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options.use_user_site,
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prefix_path=options.prefix_path,
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target_dir=options.target_dir,
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root_path=options.root_path,
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isolated_mode=options.isolated_mode,
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)
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target_temp_dir = None # type: Optional[TempDirectory]
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target_temp_dir_path = None # type: Optional[str]
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if options.target_dir:
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options.ignore_installed = True
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options.target_dir = os.path.abspath(options.target_dir)
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if (os.path.exists(options.target_dir) and not
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os.path.isdir(options.target_dir)):
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raise CommandError(
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"Target path exists but is not a directory, will not "
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"continue."
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)
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# Create a target directory for using with the target option
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target_temp_dir = TempDirectory(kind="target")
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target_temp_dir_path = target_temp_dir.path
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self.enter_context(target_temp_dir)
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global_options = options.global_options or []
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session = self.get_default_session(options)
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target_python = make_target_python(options)
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finder = self._build_package_finder(
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options=options,
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session=session,
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target_python=target_python,
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ignore_requires_python=options.ignore_requires_python,
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)
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wheel_cache = WheelCache(options.cache_dir, options.format_control)
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req_tracker = self.enter_context(get_requirement_tracker())
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directory = TempDirectory(
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delete=not options.no_clean,
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kind="install",
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globally_managed=True,
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)
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try:
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reqs = self.get_requirements(args, options, finder, session)
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reject_location_related_install_options(
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reqs, options.install_options
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)
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preparer = self.make_requirement_preparer(
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temp_build_dir=directory,
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options=options,
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req_tracker=req_tracker,
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session=session,
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finder=finder,
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use_user_site=options.use_user_site,
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)
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resolver = self.make_resolver(
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preparer=preparer,
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finder=finder,
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options=options,
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wheel_cache=wheel_cache,
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use_user_site=options.use_user_site,
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ignore_installed=options.ignore_installed,
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ignore_requires_python=options.ignore_requires_python,
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force_reinstall=options.force_reinstall,
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upgrade_strategy=upgrade_strategy,
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use_pep517=options.use_pep517,
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)
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self.trace_basic_info(finder)
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requirement_set = resolver.resolve(
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reqs, check_supported_wheels=not options.target_dir
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)
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try:
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pip_req = requirement_set.get_requirement("pip")
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except KeyError:
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modifying_pip = False
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else:
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# If we're not replacing an already installed pip,
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# we're not modifying it.
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modifying_pip = pip_req.satisfied_by is None
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protect_pip_from_modification_on_windows(
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modifying_pip=modifying_pip
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)
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check_binary_allowed = get_check_binary_allowed(
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finder.format_control
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)
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reqs_to_build = [
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r for r in requirement_set.requirements.values()
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if should_build_for_install_command(
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r, check_binary_allowed
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)
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]
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_, build_failures = build(
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reqs_to_build,
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wheel_cache=wheel_cache,
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build_options=[],
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global_options=[],
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)
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# If we're using PEP 517, we cannot do a direct install
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# so we fail here.
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pep517_build_failure_names = [
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r.name # type: ignore
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for r in build_failures if r.use_pep517
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] # type: List[str]
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if pep517_build_failure_names:
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raise InstallationError(
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"Could not build wheels for {} which use"
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" PEP 517 and cannot be installed directly".format(
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", ".join(pep517_build_failure_names)
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)
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)
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# For now, we just warn about failures building legacy
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# requirements, as we'll fall through to a direct
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# install for those.
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for r in build_failures:
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if not r.use_pep517:
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r.legacy_install_reason = 8368
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to_install = resolver.get_installation_order(
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requirement_set
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)
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# Check for conflicts in the package set we're installing.
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conflicts = None # type: Optional[ConflictDetails]
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should_warn_about_conflicts = (
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not options.ignore_dependencies and
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options.warn_about_conflicts
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)
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if should_warn_about_conflicts:
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conflicts = self._determine_conflicts(to_install)
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# Don't warn about script install locations if
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# --target has been specified
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warn_script_location = options.warn_script_location
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if options.target_dir:
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warn_script_location = False
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installed = install_given_reqs(
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to_install,
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install_options,
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global_options,
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root=options.root_path,
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home=target_temp_dir_path,
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prefix=options.prefix_path,
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warn_script_location=warn_script_location,
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use_user_site=options.use_user_site,
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pycompile=options.compile,
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)
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lib_locations = get_lib_location_guesses(
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user=options.use_user_site,
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home=target_temp_dir_path,
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root=options.root_path,
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prefix=options.prefix_path,
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isolated=options.isolated_mode,
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)
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working_set = pkg_resources.WorkingSet(lib_locations)
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installed.sort(key=operator.attrgetter('name'))
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items = []
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for result in installed:
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item = result.name
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try:
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installed_version = get_installed_version(
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result.name, working_set=working_set
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)
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if installed_version:
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item += '-' + installed_version
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except Exception:
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pass
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items.append(item)
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if conflicts is not None:
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self._warn_about_conflicts(
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conflicts,
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resolver_variant=self.determine_resolver_variant(options),
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)
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installed_desc = ' '.join(items)
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if installed_desc:
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write_output(
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'Successfully installed %s', installed_desc,
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)
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except EnvironmentError as error:
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show_traceback = (self.verbosity >= 1)
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message = create_env_error_message(
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error, show_traceback, options.use_user_site,
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)
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logger.error(message, exc_info=show_traceback) # noqa
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return ERROR
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if options.target_dir:
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assert target_temp_dir
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self._handle_target_dir(
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options.target_dir, target_temp_dir, options.upgrade
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)
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return SUCCESS
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def _handle_target_dir(self, target_dir, target_temp_dir, upgrade):
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# type: (str, TempDirectory, bool) -> None
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ensure_dir(target_dir)
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# Checking both purelib and platlib directories for installed
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# packages to be moved to target directory
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lib_dir_list = []
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# Checking both purelib and platlib directories for installed
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# packages to be moved to target directory
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scheme = distutils_scheme('', home=target_temp_dir.path)
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purelib_dir = scheme['purelib']
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platlib_dir = scheme['platlib']
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data_dir = scheme['data']
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if os.path.exists(purelib_dir):
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lib_dir_list.append(purelib_dir)
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if os.path.exists(platlib_dir) and platlib_dir != purelib_dir:
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lib_dir_list.append(platlib_dir)
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if os.path.exists(data_dir):
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lib_dir_list.append(data_dir)
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for lib_dir in lib_dir_list:
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for item in os.listdir(lib_dir):
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if lib_dir == data_dir:
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ddir = os.path.join(data_dir, item)
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if any(s.startswith(ddir) for s in lib_dir_list[:-1]):
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continue
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target_item_dir = os.path.join(target_dir, item)
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if os.path.exists(target_item_dir):
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if not upgrade:
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logger.warning(
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'Target directory %s already exists. Specify '
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'--upgrade to force replacement.',
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target_item_dir
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)
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continue
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if os.path.islink(target_item_dir):
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logger.warning(
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'Target directory %s already exists and is '
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'a link. pip will not automatically replace '
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'links, please remove if replacement is '
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'desired.',
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target_item_dir
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)
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continue
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if os.path.isdir(target_item_dir):
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shutil.rmtree(target_item_dir)
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else:
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os.remove(target_item_dir)
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shutil.move(
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os.path.join(lib_dir, item),
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target_item_dir
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)
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def _determine_conflicts(self, to_install):
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# type: (List[InstallRequirement]) -> Optional[ConflictDetails]
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try:
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return check_install_conflicts(to_install)
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except Exception:
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logger.exception(
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"Error while checking for conflicts. Please file an issue on "
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"pip's issue tracker: https://github.com/pypa/pip/issues/new"
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)
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return None
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def _warn_about_conflicts(self, conflict_details, resolver_variant):
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# type: (ConflictDetails, str) -> None
|
|
package_set, (missing, conflicting) = conflict_details
|
|
if not missing and not conflicting:
|
|
return
|
|
|
|
parts = [] # type: List[str]
|
|
if resolver_variant == "legacy":
|
|
parts.append(
|
|
"pip's legacy dependency resolver does not consider dependency "
|
|
"conflicts when selecting packages. This behaviour is the "
|
|
"source of the following dependency conflicts."
|
|
)
|
|
else:
|
|
assert resolver_variant == "2020-resolver"
|
|
parts.append(
|
|
"pip's dependency resolver does not currently take into account "
|
|
"all the packages that are installed. This behaviour is the "
|
|
"source of the following dependency conflicts."
|
|
)
|
|
|
|
# NOTE: There is some duplication here, with commands/check.py
|
|
for project_name in missing:
|
|
version = package_set[project_name][0]
|
|
for dependency in missing[project_name]:
|
|
message = (
|
|
"{name} {version} requires {requirement}, "
|
|
"which is not installed."
|
|
).format(
|
|
name=project_name,
|
|
version=version,
|
|
requirement=dependency[1],
|
|
)
|
|
parts.append(message)
|
|
|
|
for project_name in conflicting:
|
|
version = package_set[project_name][0]
|
|
for dep_name, dep_version, req in conflicting[project_name]:
|
|
message = (
|
|
"{name} {version} requires {requirement}, but {you} have "
|
|
"{dep_name} {dep_version} which is incompatible."
|
|
).format(
|
|
name=project_name,
|
|
version=version,
|
|
requirement=req,
|
|
dep_name=dep_name,
|
|
dep_version=dep_version,
|
|
you=("you" if resolver_variant == "2020-resolver" else "you'll")
|
|
)
|
|
parts.append(message)
|
|
|
|
logger.critical("\n".join(parts))
|
|
|
|
|
|
def get_lib_location_guesses(
|
|
user=False, # type: bool
|
|
home=None, # type: Optional[str]
|
|
root=None, # type: Optional[str]
|
|
isolated=False, # type: bool
|
|
prefix=None # type: Optional[str]
|
|
):
|
|
# type:(...) -> List[str]
|
|
scheme = distutils_scheme('', user=user, home=home, root=root,
|
|
isolated=isolated, prefix=prefix)
|
|
return [scheme['purelib'], scheme['platlib']]
|
|
|
|
|
|
def site_packages_writable(root, isolated):
|
|
# type: (Optional[str], bool) -> bool
|
|
return all(
|
|
test_writable_dir(d) for d in set(
|
|
get_lib_location_guesses(root=root, isolated=isolated))
|
|
)
|
|
|
|
|
|
def decide_user_install(
|
|
use_user_site, # type: Optional[bool]
|
|
prefix_path=None, # type: Optional[str]
|
|
target_dir=None, # type: Optional[str]
|
|
root_path=None, # type: Optional[str]
|
|
isolated_mode=False, # type: bool
|
|
):
|
|
# type: (...) -> bool
|
|
"""Determine whether to do a user install based on the input options.
|
|
|
|
If use_user_site is False, no additional checks are done.
|
|
If use_user_site is True, it is checked for compatibility with other
|
|
options.
|
|
If use_user_site is None, the default behaviour depends on the environment,
|
|
which is provided by the other arguments.
|
|
"""
|
|
# In some cases (config from tox), use_user_site can be set to an integer
|
|
# rather than a bool, which 'use_user_site is False' wouldn't catch.
|
|
if (use_user_site is not None) and (not use_user_site):
|
|
logger.debug("Non-user install by explicit request")
|
|
return False
|
|
|
|
if use_user_site:
|
|
if prefix_path:
|
|
raise CommandError(
|
|
"Can not combine '--user' and '--prefix' as they imply "
|
|
"different installation locations"
|
|
)
|
|
if virtualenv_no_global():
|
|
raise InstallationError(
|
|
"Can not perform a '--user' install. User site-packages "
|
|
"are not visible in this virtualenv."
|
|
)
|
|
logger.debug("User install by explicit request")
|
|
return True
|
|
|
|
# If we are here, user installs have not been explicitly requested/avoided
|
|
assert use_user_site is None
|
|
|
|
# user install incompatible with --prefix/--target
|
|
if prefix_path or target_dir:
|
|
logger.debug("Non-user install due to --prefix or --target option")
|
|
return False
|
|
|
|
# If user installs are not enabled, choose a non-user install
|
|
if not site.ENABLE_USER_SITE:
|
|
logger.debug("Non-user install because user site-packages disabled")
|
|
return False
|
|
|
|
# If we have permission for a non-user install, do that,
|
|
# otherwise do a user install.
|
|
if site_packages_writable(root=root_path, isolated=isolated_mode):
|
|
logger.debug("Non-user install because site-packages writeable")
|
|
return False
|
|
|
|
logger.info("Defaulting to user installation because normal site-packages "
|
|
"is not writeable")
|
|
return True
|
|
|
|
|
|
def reject_location_related_install_options(requirements, options):
|
|
# type: (List[InstallRequirement], Optional[List[str]]) -> None
|
|
"""If any location-changing --install-option arguments were passed for
|
|
requirements or on the command-line, then show a deprecation warning.
|
|
"""
|
|
def format_options(option_names):
|
|
# type: (Iterable[str]) -> List[str]
|
|
return ["--{}".format(name.replace("_", "-")) for name in option_names]
|
|
|
|
offenders = []
|
|
|
|
for requirement in requirements:
|
|
install_options = requirement.install_options
|
|
location_options = parse_distutils_args(install_options)
|
|
if location_options:
|
|
offenders.append(
|
|
"{!r} from {}".format(
|
|
format_options(location_options.keys()), requirement
|
|
)
|
|
)
|
|
|
|
if options:
|
|
location_options = parse_distutils_args(options)
|
|
if location_options:
|
|
offenders.append(
|
|
"{!r} from command line".format(
|
|
format_options(location_options.keys())
|
|
)
|
|
)
|
|
|
|
if not offenders:
|
|
return
|
|
|
|
raise CommandError(
|
|
"Location-changing options found in --install-option: {}."
|
|
" This is unsupported, use pip-level options like --user,"
|
|
" --prefix, --root, and --target instead.".format(
|
|
"; ".join(offenders)
|
|
)
|
|
)
|
|
|
|
|
|
def create_env_error_message(error, show_traceback, using_user_site):
|
|
# type: (EnvironmentError, bool, bool) -> str
|
|
"""Format an error message for an EnvironmentError
|
|
|
|
It may occur anytime during the execution of the install command.
|
|
"""
|
|
parts = []
|
|
|
|
# Mention the error if we are not going to show a traceback
|
|
parts.append("Could not install packages due to an EnvironmentError")
|
|
if not show_traceback:
|
|
parts.append(": ")
|
|
parts.append(str(error))
|
|
else:
|
|
parts.append(".")
|
|
|
|
# Spilt the error indication from a helper message (if any)
|
|
parts[-1] += "\n"
|
|
|
|
# Suggest useful actions to the user:
|
|
# (1) using user site-packages or (2) verifying the permissions
|
|
if error.errno == errno.EACCES:
|
|
user_option_part = "Consider using the `--user` option"
|
|
permissions_part = "Check the permissions"
|
|
|
|
if not using_user_site:
|
|
parts.extend([
|
|
user_option_part, " or ",
|
|
permissions_part.lower(),
|
|
])
|
|
else:
|
|
parts.append(permissions_part)
|
|
parts.append(".\n")
|
|
|
|
return "".join(parts).strip() + "\n"
|