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?? ..
?? __init__.py(4 KB)
?? __pycache__
?? cache.py(5.54 KB)
?? check.py(1.64 KB)
?? completion.py(3.01 KB)
?? configuration.py(9.13 KB)
?? debug.py(7.14 KB)
?? download.py(4.8 KB)
?? freeze.py(3.37 KB)
?? hash.py(1.8 KB)
?? help.py(1.24 KB)
?? install.py(28.05 KB)
?? list.py(11.05 KB)
?? search.py(5.62 KB)
?? show.py(6.83 KB)
?? uninstall.py(3.23 KB)
?? wheel.py(6.27 KB)

Editing: install.py

from __future__ import absolute_import

import errno
import logging
import operator
import os
import shutil
import site
import sys
from os import path
from optparse import SUPPRESS_HELP

from pip._vendor import pkg_resources
from pip._vendor.packaging.utils import canonicalize_name

from pip._internal.cache import WheelCache
from pip._internal.cli import cmdoptions
from pip._internal.cli.cmdoptions import make_target_python
from pip._internal.cli.req_command import RequirementCommand, with_cleanup
from pip._internal.cli.status_codes import ERROR, SUCCESS
from pip._internal.exceptions import CommandError, InstallationError
from pip._internal.locations import distutils_scheme
from pip._internal.operations.check import check_install_conflicts
from pip._internal.req import install_given_reqs
from pip._internal.req.req_tracker import get_requirement_tracker
from pip._internal.utils.datetime import today_is_later_than
from pip._internal.utils.distutils_args import parse_distutils_args
from pip._internal.utils.filesystem import test_writable_dir
from pip._internal.utils.misc import (
    ensure_dir,
    get_installed_version,
    get_pip_version,
    protect_pip_from_modification_on_windows,
    write_output,
)
from pip._internal.utils.temp_dir import TempDirectory
from pip._internal.utils.typing import MYPY_CHECK_RUNNING
from pip._internal.utils.virtualenv import virtualenv_no_global
from pip._internal.wheel_builder import build, should_build_for_install_command

if MYPY_CHECK_RUNNING:
    from optparse import Values
    from typing import Iterable, List, Optional

from pip._internal.models.format_control import FormatControl
    from pip._internal.operations.check import ConflictDetails
    from pip._internal.req.req_install import InstallRequirement
    from pip._internal.wheel_builder import BinaryAllowedPredicate

logger = logging.getLogger(__name__)

def get_check_binary_allowed(format_control):
    # type: (FormatControl) -> BinaryAllowedPredicate
    def check_binary_allowed(req):
        # type: (InstallRequirement) -> bool
        if req.use_pep517:
            return True
        canonical_name = canonicalize_name(req.name)
        allowed_formats = format_control.get_allowed_formats(canonical_name)
        return "binary" in allowed_formats

return check_binary_allowed

class InstallCommand(RequirementCommand):
    """
    Install packages from:

- PyPI (and other indexes) using requirement specifiers.
    - VCS project urls.
    - Local project directories.
    - Local or remote source archives.

pip also supports installing from "requirements files", which provide
    an easy way to specify a whole environment to be installed.
    """

usage = """
      %prog [options] <requirement specifier> [package-index-options] ...
      %prog [options] -r <requirements file> [package-index-options] ...
      %prog [options] [-e] <vcs project url> ...
      %prog [options] [-e] <local project path> ...
      %prog [options] <archive url/path> ..."""

def add_options(self):
        # type: () -> None
        self.cmd_opts.add_option(cmdoptions.requirements())
        self.cmd_opts.add_option(cmdoptions.constraints())
        self.cmd_opts.add_option(cmdoptions.no_deps())
        self.cmd_opts.add_option(cmdoptions.pre())

self.cmd_opts.add_option(cmdoptions.editable())
        self.cmd_opts.add_option(
            '-t', '--target',
            dest='target_dir',
            metavar='dir',
            default=None,
            help='Install packages into <dir>. '
                 'By default this will not replace existing files/folders in '
                 '<dir>. Use --upgrade to replace existing packages in <dir> '
                 'with new versions.'
        )
        cmdoptions.add_target_python_options(self.cmd_opts)

self.cmd_opts.add_option(
            '--user',
            dest='use_user_site',
            action='store_true',
            help="Install to the Python user install directory for your "
                 "platform. Typically ~/.local/, or %APPDATA%\\Python on "
                 "Windows. (See the Python documentation for site.USER_BASE "
                 "for full details.)")
        self.cmd_opts.add_option(
            '--no-user',
            dest='use_user_site',
            action='store_false',
            help=SUPPRESS_HELP)
        self.cmd_opts.add_option(
            '--root',
            dest='root_path',
            metavar='dir',
            default=None,
            help="Install everything relative to this alternate root "
                 "directory.")
        self.cmd_opts.add_option(
            '--prefix',
            dest='prefix_path',
            metavar='dir',
            default=None,
            help="Installation prefix where lib, bin and other top-level "
                 "folders are placed")

self.cmd_opts.add_option(cmdoptions.build_dir())

self.cmd_opts.add_option(cmdoptions.src())

self.cmd_opts.add_option(
            '-U', '--upgrade',
            dest='upgrade',
            action='store_true',
            help='Upgrade all specified packages to the newest available '
                 'version. The handling of dependencies depends on the '
                 'upgrade-strategy used.'
        )

self.cmd_opts.add_option(
            '--upgrade-strategy',
            dest='upgrade_strategy',
            default='only-if-needed',
            choices=['only-if-needed', 'eager'],
            help='Determines how dependency upgrading should be handled '
                 '[default: %default]. '
                 '"eager" - dependencies are upgraded regardless of '
                 'whether the currently installed version satisfies the '
                 'requirements of the upgraded package(s). '
                 '"only-if-needed" -  are upgraded only when they do not '
                 'satisfy the requirements of the upgraded package(s).'
        )

self.cmd_opts.add_option(
            '--force-reinstall',
            dest='force_reinstall',
            action='store_true',
            help='Reinstall all packages even if they are already '
                 'up-to-date.')

self.cmd_opts.add_option(
            '-I', '--ignore-installed',
            dest='ignore_installed',
            action='store_true',
            help='Ignore the installed packages, overwriting them. '
                 'This can break your system if the existing package '
                 'is of a different version or was installed '
                 'with a different package manager!'
        )

self.cmd_opts.add_option(cmdoptions.ignore_requires_python())
        self.cmd_opts.add_option(cmdoptions.no_build_isolation())
        self.cmd_opts.add_option(cmdoptions.use_pep517())
        self.cmd_opts.add_option(cmdoptions.no_use_pep517())

self.cmd_opts.add_option(cmdoptions.install_options())
        self.cmd_opts.add_option(cmdoptions.global_options())

self.cmd_opts.add_option(
            "--compile",
            action="store_true",
            dest="compile",
            default=True,
            help="Compile Python source files to bytecode",
        )

self.cmd_opts.add_option(
            "--no-compile",
            action="store_false",
            dest="compile",
            help="Do not compile Python source files to bytecode",
        )

self.cmd_opts.add_option(
            "--no-warn-script-location",
            action="store_false",
            dest="warn_script_location",
            default=True,
            help="Do not warn when installing scripts outside PATH",
        )
        self.cmd_opts.add_option(
            "--no-warn-conflicts",
            action="store_false",
            dest="warn_about_conflicts",
            default=True,
            help="Do not warn about broken dependencies",
        )

self.cmd_opts.add_option(cmdoptions.no_binary())
        self.cmd_opts.add_option(cmdoptions.only_binary())
        self.cmd_opts.add_option(cmdoptions.prefer_binary())
        self.cmd_opts.add_option(cmdoptions.require_hashes())
        self.cmd_opts.add_option(cmdoptions.progress_bar())

index_opts = cmdoptions.make_option_group(
            cmdoptions.index_group,
            self.parser,
        )

self.parser.insert_option_group(0, index_opts)
        self.parser.insert_option_group(0, self.cmd_opts)

@with_cleanup
    def run(self, options, args):
        # type: (Values, List[str]) -> int
        if options.use_user_site and options.target_dir is not None:
            raise CommandError("Can not combine '--user' and '--target'")

cmdoptions.check_install_build_global(options)

def is_venv():
            return (hasattr(sys, 'real_prefix') or
                    (hasattr(sys, 'base_prefix') and
                     sys.base_prefix != sys.prefix))

# Check whether we have root privileges and aren't in venv/virtualenv
        if os.getuid() == 0 and not is_venv() and not options.root_path:
            command = path.basename(sys.argv[0])
            if command == "__main__.py":
                command = path.basename(sys.executable) + " -m pip"
            logger.warning(
                "Running pip install with root privileges is "
                "generally not a good idea. Try `%s install --user` instead."
                % command
            )

upgrade_strategy = "to-satisfy-only"
        if options.upgrade:
            upgrade_strategy = options.upgrade_strategy

cmdoptions.check_dist_restriction(options, check_target=True)

install_options = options.install_options or []

logger.debug("Using %s", get_pip_version())
        options.use_user_site = decide_user_install(
            options.use_user_site,
            prefix_path=options.prefix_path,
            target_dir=options.target_dir,
            root_path=options.root_path,
            isolated_mode=options.isolated_mode,
        )

target_temp_dir = None  # type: Optional[TempDirectory]
        target_temp_dir_path = None  # type: Optional[str]
        if options.target_dir:
            options.ignore_installed = True
            options.target_dir = os.path.abspath(options.target_dir)
            if (os.path.exists(options.target_dir) and not
                    os.path.isdir(options.target_dir)):
                raise CommandError(
                    "Target path exists but is not a directory, will not "
                    "continue."
                )

# Create a target directory for using with the target option
            target_temp_dir = TempDirectory(kind="target")
            target_temp_dir_path = target_temp_dir.path
            self.enter_context(target_temp_dir)

global_options = options.global_options or []

session = self.get_default_session(options)

target_python = make_target_python(options)
        finder = self._build_package_finder(
            options=options,
            session=session,
            target_python=target_python,
            ignore_requires_python=options.ignore_requires_python,
        )
        build_delete = (not (options.no_clean or options.build_dir))
        wheel_cache = WheelCache(options.cache_dir, options.format_control)

req_tracker = self.enter_context(get_requirement_tracker())

directory = TempDirectory(
            options.build_dir,
            delete=build_delete,
            kind="install",
            globally_managed=True,
        )

try:
            reqs = self.get_requirements(args, options, finder, session)

reject_location_related_install_options(
                reqs, options.install_options
            )

preparer = self.make_requirement_preparer(
                temp_build_dir=directory,
                options=options,
                req_tracker=req_tracker,
                session=session,
                finder=finder,
                use_user_site=options.use_user_site,
            )
            resolver = self.make_resolver(
                preparer=preparer,
                finder=finder,
                options=options,
                wheel_cache=wheel_cache,
                use_user_site=options.use_user_site,
                ignore_installed=options.ignore_installed,
                ignore_requires_python=options.ignore_requires_python,
                force_reinstall=options.force_reinstall,
                upgrade_strategy=upgrade_strategy,
                use_pep517=options.use_pep517,
            )

self.trace_basic_info(finder)

requirement_set = resolver.resolve(
                reqs, check_supported_wheels=not options.target_dir
            )

try:
                pip_req = requirement_set.get_requirement("pip")
            except KeyError:
                modifying_pip = False
            else:
                # If we're not replacing an already installed pip,
                # we're not modifying it.
                modifying_pip = pip_req.satisfied_by is None
            protect_pip_from_modification_on_windows(
                modifying_pip=modifying_pip
            )

check_binary_allowed = get_check_binary_allowed(
                finder.format_control
            )

reqs_to_build = [
                r for r in requirement_set.requirements.values()
                if should_build_for_install_command(
                    r, check_binary_allowed
                )
            ]

_, build_failures = build(
                reqs_to_build,
                wheel_cache=wheel_cache,
                build_options=[],
                global_options=[],
            )

# If we're using PEP 517, we cannot do a direct install
            # so we fail here.
            pep517_build_failure_names = [
                r.name   # type: ignore
                for r in build_failures if r.use_pep517
            ]  # type: List[str]
            if pep517_build_failure_names:
                raise InstallationError(
                    "Could not build wheels for {} which use"
                    " PEP 517 and cannot be installed directly".format(
                        ", ".join(pep517_build_failure_names)
                    )
                )

# For now, we just warn about failures building legacy
            # requirements, as we'll fall through to a direct
            # install for those.
            for r in build_failures:
                if not r.use_pep517:
                    r.legacy_install_reason = 8368

to_install = resolver.get_installation_order(
                requirement_set
            )

# Check for conflicts in the package set we're installing.
            conflicts = None  # type: Optional[ConflictDetails]
            should_warn_about_conflicts = (
                not options.ignore_dependencies and
                options.warn_about_conflicts
            )
            if should_warn_about_conflicts:
                conflicts = self._determine_conflicts(to_install)

# Don't warn about script install locations if
            # --target has been specified
            warn_script_location = options.warn_script_location
            if options.target_dir:
                warn_script_location = False

installed = install_given_reqs(
                to_install,
                install_options,
                global_options,
                root=options.root_path,
                home=target_temp_dir_path,
                prefix=options.prefix_path,
                warn_script_location=warn_script_location,
                use_user_site=options.use_user_site,
                pycompile=options.compile,
            )

lib_locations = get_lib_location_guesses(
                user=options.use_user_site,
                home=target_temp_dir_path,
                root=options.root_path,
                prefix=options.prefix_path,
                isolated=options.isolated_mode,
            )
            working_set = pkg_resources.WorkingSet(lib_locations)

installed.sort(key=operator.attrgetter('name'))
            items = []
            for result in installed:
                item = result.name
                try:
                    installed_version = get_installed_version(
                        result.name, working_set=working_set
                    )
                    if installed_version:
                        item += '-' + installed_version
                except Exception:
                    pass
                items.append(item)

if conflicts is not None:
                self._warn_about_conflicts(
                    conflicts,
                    new_resolver='2020-resolver' in options.features_enabled,
                )

installed_desc = ' '.join(items)
            if installed_desc:
                write_output(
                    'Successfully installed %s', installed_desc,
                )
        except EnvironmentError as error:
            show_traceback = (self.verbosity >= 1)

message = create_env_error_message(
                error, show_traceback, options.use_user_site,
            )
            logger.error(message, exc_info=show_traceback)  # noqa

return ERROR

if options.target_dir:
            assert target_temp_dir
            self._handle_target_dir(
                options.target_dir, target_temp_dir, options.upgrade
            )

return SUCCESS

def _handle_target_dir(self, target_dir, target_temp_dir, upgrade):
        # type: (str, TempDirectory, bool) -> None
        ensure_dir(target_dir)

# Checking both purelib and platlib directories for installed
        # packages to be moved to target directory
        lib_dir_list = []

# Checking both purelib and platlib directories for installed
        # packages to be moved to target directory
        scheme = distutils_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):
        # type: (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, new_resolver):
        # type: (ConflictDetails, bool) -> None
        package_set, (missing, conflicting) = conflict_details
        if not missing and not conflicting:
            return

parts = []  # type: List[str]
        if not new_resolver:
            parts.append(
                "After October 2020 you may experience errors when installing "
                "or updating packages. This is because pip will change the "
                "way that it resolves dependency conflicts.\n"
            )
            parts.append(
                "We recommend you use --use-feature=2020-resolver to test "
                "your packages with the new resolver before it becomes the "
                "default.\n"
            )
        elif not today_is_later_than(year=2020, month=7, day=31):
            # NOTE: trailing newlines here are intentional
            parts.append(
                "Pip will install or upgrade your package(s) and its "
                "dependencies without taking into account other packages you "
                "already have installed. This may cause an uncaught "
                "dependency conflict.\n"
            )
            form_link = "https://forms.gle/cWKMoDs8sUVE29hz9"
            parts.append(
                "If you would like pip to take your other packages into "
                "account, please tell us here: {}\n".format(form_link)
            )

# 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'll have "
                    "{dep_name} {dep_version} which is incompatible."
                ).format(
                    name=project_name,
                    version=version,
                    requirement=req,
                    dep_name=dep_name,
                    dep_version=dep_version,
                )
                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"

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