from __future__ import absolute_import import errno import logging import operator import os import shutil import site 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.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] [package-index-options] ... %prog [options] -r [package-index-options] ... %prog [options] [-e] ... %prog [options] [-e] ... %prog [options] ...""" 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 . ' 'By default this will not replace existing files/folders in ' '. Use --upgrade to replace existing packages in ' '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) 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, ) wheel_cache = WheelCache(options.cache_dir, options.format_control) req_tracker = self.enter_context(get_requirement_tracker()) directory = TempDirectory( delete=not options.no_clean, 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, resolver_variant=self.determine_resolver_variant(options), ) 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, resolver_variant): # 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"