775 lines
28 KiB
Python
775 lines
28 KiB
Python
import errno
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import json
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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, Values
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from typing import List, Optional
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from pip._vendor.rich import print_json
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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 (
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RequirementCommand,
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warn_if_run_as_root,
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with_cleanup,
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)
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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 get_scheme
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from pip._internal.metadata import get_environment
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from pip._internal.models.installation_report import InstallationReport
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from pip._internal.operations.build.build_tracker import get_build_tracker
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from pip._internal.operations.check import ConflictDetails, check_install_conflicts
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from pip._internal.req import install_given_reqs
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from pip._internal.req.req_install import (
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InstallRequirement,
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check_legacy_setup_py_options,
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)
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from pip._internal.utils.compat import WINDOWS
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from pip._internal.utils.filesystem import test_writable_dir
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from pip._internal.utils.logging import getLogger
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from pip._internal.utils.misc import (
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check_externally_managed,
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ensure_dir,
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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.virtualenv import (
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running_under_virtualenv,
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virtualenv_no_global,
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)
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from pip._internal.wheel_builder import build, should_build_for_install_command
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logger = getLogger(__name__)
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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) -> 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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"--dry-run",
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action="store_true",
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dest="dry_run",
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default=False,
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help=(
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"Don't actually install anything, just print what would be. "
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"Can be used in combination with --ignore-installed "
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"to 'resolve' the requirements."
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),
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)
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self.cmd_opts.add_option(
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"-t",
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"--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=(
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"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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)
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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=(
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"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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),
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)
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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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)
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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 directory.",
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)
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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=(
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"Installation prefix where lib, bin and other top-level "
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"folders are placed. Note that the resulting installation may "
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"contain scripts and other resources which reference the "
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"Python interpreter of pip, and not that of ``--prefix``. "
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"See also the ``--python`` option if the intention is to "
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"install packages into another (possibly pip-free) "
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"environment."
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),
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)
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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",
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"--upgrade",
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dest="upgrade",
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action="store_true",
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help=(
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"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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)
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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=(
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"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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)
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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 up-to-date.",
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)
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self.cmd_opts.add_option(
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"-I",
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"--ignore-installed",
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dest="ignore_installed",
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action="store_true",
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help=(
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"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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)
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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.check_build_deps())
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self.cmd_opts.add_option(cmdoptions.override_externally_managed())
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self.cmd_opts.add_option(cmdoptions.config_settings())
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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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self.cmd_opts.add_option(cmdoptions.root_user_action())
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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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self.cmd_opts.add_option(
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"--report",
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dest="json_report_file",
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metavar="file",
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default=None,
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help=(
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"Generate a JSON file describing what pip did to install "
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"the provided requirements. "
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"Can be used in combination with --dry-run and --ignore-installed "
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"to 'resolve' the requirements. "
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"When - is used as file name it writes to stdout. "
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"When writing to stdout, please combine with the --quiet option "
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"to avoid mixing pip logging output with JSON output."
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),
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)
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@with_cleanup
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def run(self, options: Values, args: 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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# Check whether the environment we're installing into is externally
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# managed, as specified in PEP 668. Specifying --root, --target, or
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# --prefix disables the check, since there's no reliable way to locate
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# the EXTERNALLY-MANAGED file for those cases. An exception is also
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# made specifically for "--dry-run --report" for convenience.
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installing_into_current_environment = (
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not (options.dry_run and options.json_report_file)
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and options.root_path is None
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and options.target_dir is None
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and options.prefix_path is None
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)
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if (
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installing_into_current_environment
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and not options.override_externally_managed
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):
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check_externally_managed()
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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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logger.verbose("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: Optional[TempDirectory] = None
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target_temp_dir_path: Optional[str] = None
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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 (
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# fmt: off
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os.path.exists(options.target_dir) and
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not os.path.isdir(options.target_dir)
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# fmt: on
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):
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raise CommandError(
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"Target path exists but is not a directory, will not 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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build_tracker = self.enter_context(get_build_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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check_legacy_setup_py_options(options, reqs)
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wheel_cache = WheelCache(options.cache_dir)
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# Only when installing is it permitted to use PEP 660.
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# In other circumstances (pip wheel, pip download) we generate
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# regular (i.e. non editable) metadata and wheels.
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for req in reqs:
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req.permit_editable_wheels = True
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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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build_tracker=build_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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verbosity=self.verbosity,
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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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if options.json_report_file:
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report = InstallationReport(requirement_set.requirements_to_install)
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if options.json_report_file == "-":
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print_json(data=report.to_dict())
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else:
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with open(options.json_report_file, "w", encoding="utf-8") as f:
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json.dump(report.to_dict(), f, indent=2, ensure_ascii=False)
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if options.dry_run:
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# In non dry-run mode, the legacy versions and specifiers check
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# will be done as part of conflict detection.
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requirement_set.warn_legacy_versions_and_specifiers()
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would_install_items = sorted(
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(r.metadata["name"], r.metadata["version"])
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for r in requirement_set.requirements_to_install
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)
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if would_install_items:
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write_output(
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"Would install %s",
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" ".join("-".join(item) for item in would_install_items),
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)
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return SUCCESS
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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(modifying_pip=modifying_pip)
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reqs_to_build = [
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r
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for r in requirement_set.requirements.values()
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if should_build_for_install_command(r)
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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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verify=True,
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build_options=[],
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global_options=global_options,
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)
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if build_failures:
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raise InstallationError(
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"Could not build wheels for {}, which is required to "
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"install pyproject.toml-based projects".format(
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", ".join(r.name for r in build_failures) # type: ignore
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)
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)
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to_install = resolver.get_installation_order(requirement_set)
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# Check for conflicts in the package set we're installing.
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conflicts: Optional[ConflictDetails] = None
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should_warn_about_conflicts = (
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not options.ignore_dependencies and 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 or --prefix has been specified
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warn_script_location = options.warn_script_location
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if options.target_dir or options.prefix_path:
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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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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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env = get_environment(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_dist = env.get_distribution(item)
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if installed_dist is not None:
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item = f"{item}-{installed_dist.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",
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installed_desc,
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)
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except OSError as error:
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show_traceback = self.verbosity >= 1
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message = create_os_error_message(
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error,
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show_traceback,
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options.use_user_site,
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)
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logger.error(message, exc_info=show_traceback)
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return ERROR
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|
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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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if options.root_user_action == "warn":
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warn_if_run_as_root()
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return SUCCESS
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|
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def _handle_target_dir(
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self, target_dir: str, target_temp_dir: TempDirectory, upgrade: bool
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) -> 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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|
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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 = get_scheme("", home=target_temp_dir.path)
|
|
purelib_dir = scheme.purelib
|
|
platlib_dir = scheme.platlib
|
|
data_dir = scheme.data
|
|
|
|
if os.path.exists(purelib_dir):
|
|
lib_dir_list.append(purelib_dir)
|
|
if os.path.exists(platlib_dir) and platlib_dir != purelib_dir:
|
|
lib_dir_list.append(platlib_dir)
|
|
if os.path.exists(data_dir):
|
|
lib_dir_list.append(data_dir)
|
|
|
|
for lib_dir in lib_dir_list:
|
|
for item in os.listdir(lib_dir):
|
|
if lib_dir == data_dir:
|
|
ddir = os.path.join(data_dir, item)
|
|
if any(s.startswith(ddir) for s in lib_dir_list[:-1]):
|
|
continue
|
|
target_item_dir = os.path.join(target_dir, item)
|
|
if os.path.exists(target_item_dir):
|
|
if not upgrade:
|
|
logger.warning(
|
|
"Target directory %s already exists. Specify "
|
|
"--upgrade to force replacement.",
|
|
target_item_dir,
|
|
)
|
|
continue
|
|
if os.path.islink(target_item_dir):
|
|
logger.warning(
|
|
"Target directory %s already exists and is "
|
|
"a link. pip will not automatically replace "
|
|
"links, please remove if replacement is "
|
|
"desired.",
|
|
target_item_dir,
|
|
)
|
|
continue
|
|
if os.path.isdir(target_item_dir):
|
|
shutil.rmtree(target_item_dir)
|
|
else:
|
|
os.remove(target_item_dir)
|
|
|
|
shutil.move(os.path.join(lib_dir, item), target_item_dir)
|
|
|
|
def _determine_conflicts(
|
|
self, to_install: List[InstallRequirement]
|
|
) -> Optional[ConflictDetails]:
|
|
try:
|
|
return check_install_conflicts(to_install)
|
|
except Exception:
|
|
logger.exception(
|
|
"Error while checking for conflicts. Please file an issue on "
|
|
"pip's issue tracker: https://github.com/pypa/pip/issues/new"
|
|
)
|
|
return None
|
|
|
|
def _warn_about_conflicts(
|
|
self, conflict_details: ConflictDetails, resolver_variant: str
|
|
) -> None:
|
|
package_set, (missing, conflicting) = conflict_details
|
|
if not missing and not conflicting:
|
|
return
|
|
|
|
parts: 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 == "resolvelib"
|
|
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 = (
|
|
f"{project_name} {version} requires {dependency[1]}, "
|
|
"which is not installed."
|
|
)
|
|
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 == "resolvelib" else "you'll"),
|
|
)
|
|
parts.append(message)
|
|
|
|
logger.critical("\n".join(parts))
|
|
|
|
|
|
def get_lib_location_guesses(
|
|
user: bool = False,
|
|
home: Optional[str] = None,
|
|
root: Optional[str] = None,
|
|
isolated: bool = False,
|
|
prefix: Optional[str] = None,
|
|
) -> List[str]:
|
|
scheme = get_scheme(
|
|
"",
|
|
user=user,
|
|
home=home,
|
|
root=root,
|
|
isolated=isolated,
|
|
prefix=prefix,
|
|
)
|
|
return [scheme.purelib, scheme.platlib]
|
|
|
|
|
|
def site_packages_writable(root: Optional[str], isolated: 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: Optional[bool],
|
|
prefix_path: Optional[str] = None,
|
|
target_dir: Optional[str] = None,
|
|
root_path: Optional[str] = None,
|
|
isolated_mode: bool = False,
|
|
) -> 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 create_os_error_message(
|
|
error: OSError, show_traceback: bool, using_user_site: bool
|
|
) -> str:
|
|
"""Format an error message for an OSError
|
|
|
|
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 OSError")
|
|
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 running_under_virtualenv() and not using_user_site:
|
|
parts.extend(
|
|
[
|
|
user_option_part,
|
|
" or ",
|
|
permissions_part.lower(),
|
|
]
|
|
)
|
|
else:
|
|
parts.append(permissions_part)
|
|
parts.append(".\n")
|
|
|
|
# Suggest the user to enable Long Paths if path length is
|
|
# more than 260
|
|
if (
|
|
WINDOWS
|
|
and error.errno == errno.ENOENT
|
|
and error.filename
|
|
and len(error.filename) > 260
|
|
):
|
|
parts.append(
|
|
"HINT: This error might have occurred since "
|
|
"this system does not have Windows Long Path "
|
|
"support enabled. You can find information on "
|
|
"how to enable this at "
|
|
"https://pip.pypa.io/warnings/enable-long-paths\n"
|
|
)
|
|
|
|
return "".join(parts).strip() + "\n"
|