from __future__ import absolute_import import errno import logging import operator import os import shutil from optparse import SUPPRESS_HELP from pip._vendor import pkg_resources from pip._internal.cache import WheelCache from pip._internal.cli import cmdoptions from pip._internal.cli.base_command import RequirementCommand from pip._internal.cli.status_codes import ERROR from pip._internal.exceptions import ( CommandError, InstallationError, PreviousBuildDirError, ) from pip._internal.locations import distutils_scheme, virtualenv_no_global from pip._internal.operations.check import check_install_conflicts from pip._internal.operations.prepare import RequirementPreparer from pip._internal.req import RequirementSet, install_given_reqs from pip._internal.req.req_tracker import RequirementTracker from pip._internal.resolve import Resolver from pip._internal.utils.filesystem import check_path_owner from pip._internal.utils.misc import ( ensure_dir, get_installed_version, protect_pip_from_modification_on_windows, ) from pip._internal.utils.temp_dir import TempDirectory from pip._internal.wheel import WheelBuilder try: import wheel except ImportError: wheel = None from pip._internal.locations import running_under_virtualenv logger = logging.getLogger(__name__) 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. """ name = 'install' usage = """ %prog [options] [package-index-options] ... %prog [options] -r [package-index-options] ... %prog [options] [-e] ... %prog [options] [-e] ... %prog [options] ...""" summary = 'Install packages.' def __init__(self, *args, **kw): super(InstallCommand, self).__init__(*args, **kw) cmd_opts = self.cmd_opts cmd_opts.add_option(cmdoptions.requirements()) cmd_opts.add_option(cmdoptions.constraints()) cmd_opts.add_option(cmdoptions.no_deps()) cmd_opts.add_option(cmdoptions.pre()) cmd_opts.add_option(cmdoptions.editable()) 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.' ) cmd_opts.add_option(cmdoptions.platform()) cmd_opts.add_option(cmdoptions.python_version()) cmd_opts.add_option(cmdoptions.implementation()) cmd_opts.add_option(cmdoptions.abi()) 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.) On Debian systems, this is the " "default when running outside of a virtual environment " "and not as root.") cmd_opts.add_option( '--no-user', dest='use_system_location', action='store_true', help=SUPPRESS_HELP) cmd_opts.add_option( '--root', dest='root_path', metavar='dir', default=None, help="Install everything relative to this alternate root " "directory.") 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") cmd_opts.add_option( '--system', dest='use_system_location', action='store_true', help="Install using the system scheme (overrides --user on " "Debian systems)") cmd_opts.add_option(cmdoptions.build_dir()) cmd_opts.add_option(cmdoptions.src()) 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.' ) 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).' ) cmd_opts.add_option( '--force-reinstall', dest='force_reinstall', action='store_true', help='Reinstall all packages even if they are already ' 'up-to-date.') cmd_opts.add_option( '-I', '--ignore-installed', dest='ignore_installed', action='store_true', help='Ignore the installed packages (reinstalling instead).') cmd_opts.add_option(cmdoptions.ignore_requires_python()) cmd_opts.add_option(cmdoptions.no_build_isolation()) cmd_opts.add_option(cmdoptions.install_options()) cmd_opts.add_option(cmdoptions.global_options()) cmd_opts.add_option( "--compile", action="store_true", dest="compile", default=True, help="Compile Python source files to bytecode", ) cmd_opts.add_option( "--no-compile", action="store_false", dest="compile", help="Do not compile Python source files to bytecode", ) 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", ) cmd_opts.add_option( "--no-warn-conflicts", action="store_false", dest="warn_about_conflicts", default=True, help="Do not warn about broken dependencies", ) cmd_opts.add_option(cmdoptions.no_binary()) cmd_opts.add_option(cmdoptions.only_binary()) cmd_opts.add_option(cmdoptions.prefer_binary()) cmd_opts.add_option(cmdoptions.no_clean()) cmd_opts.add_option(cmdoptions.require_hashes()) 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, cmd_opts) def run(self, options, args): cmdoptions.check_install_build_global(options) upgrade_strategy = "to-satisfy-only" if options.upgrade: upgrade_strategy = options.upgrade_strategy if options.build_dir: options.build_dir = os.path.abspath(options.build_dir) cmdoptions.check_dist_restriction(options, check_target=True) if options.python_version: python_versions = [options.python_version] else: python_versions = None # compute install location defaults if (not options.use_user_site and not options.prefix_path and not options.target_dir and not options.use_system_location): if not running_under_virtualenv() and os.geteuid() != 0: options.use_user_site = True if options.use_system_location: options.use_user_site = False options.src_dir = os.path.abspath(options.src_dir) install_options = options.install_options or [] if options.use_user_site: if options.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." ) install_options.append('--user') install_options.append('--prefix=') target_temp_dir = TempDirectory(kind="target") 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.create() install_options.append('--home=' + target_temp_dir.path) global_options = options.global_options or [] with self._build_session(options) as session: finder = self._build_package_finder( options=options, session=session, platform=options.platform, python_versions=python_versions, abi=options.abi, implementation=options.implementation, ) build_delete = (not (options.no_clean or options.build_dir)) wheel_cache = WheelCache(options.cache_dir, options.format_control) if options.cache_dir and not check_path_owner(options.cache_dir): logger.warning( "The directory '%s' or its parent directory is not owned " "by the current user and caching wheels has been " "disabled. check the permissions and owner of that " "directory. If executing pip with sudo, you may want " "sudo's -H flag.", options.cache_dir, ) options.cache_dir = None with RequirementTracker() as req_tracker, TempDirectory( options.build_dir, delete=build_delete, kind="install" ) as directory: requirement_set = RequirementSet( require_hashes=options.require_hashes, check_supported_wheels=not options.target_dir, ) try: self.populate_requirement_set( requirement_set, args, options, finder, session, self.name, wheel_cache ) preparer = RequirementPreparer( build_dir=directory.path, src_dir=options.src_dir, download_dir=None, wheel_download_dir=None, progress_bar=options.progress_bar, build_isolation=options.build_isolation, req_tracker=req_tracker, ) resolver = Resolver( preparer=preparer, finder=finder, session=session, wheel_cache=wheel_cache, use_user_site=options.use_user_site, upgrade_strategy=upgrade_strategy, force_reinstall=options.force_reinstall, ignore_dependencies=options.ignore_dependencies, ignore_requires_python=options.ignore_requires_python, ignore_installed=options.ignore_installed, isolated=options.isolated_mode, ) resolver.resolve(requirement_set) protect_pip_from_modification_on_windows( modifying_pip=requirement_set.has_requirement("pip") ) # If caching is disabled or wheel is not installed don't # try to build wheels. if wheel and options.cache_dir: # build wheels before install. wb = WheelBuilder( finder, preparer, wheel_cache, build_options=[], global_options=[], ) # Ignore the result: a failed wheel will be # installed from the sdist/vcs whatever. wb.build( requirement_set.requirements.values(), session=session, autobuilding=True ) to_install = resolver.get_installation_order( requirement_set ) # Consistency Checking of the package set we're installing. should_warn_about_conflicts = ( not options.ignore_dependencies and options.warn_about_conflicts ) if should_warn_about_conflicts: self._warn_about_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, pycompile=options.compile, warn_script_location=warn_script_location, use_user_site=options.use_user_site, ) 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) reqs = sorted(installed, key=operator.attrgetter('name')) items = [] for req in reqs: item = req.name try: installed_version = get_installed_version( req.name, working_set=working_set ) if installed_version: item += '-' + installed_version except Exception: pass items.append(item) installed = ' '.join(items) if installed: logger.info('Successfully installed %s', installed) 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) return ERROR except PreviousBuildDirError: options.no_clean = True raise finally: # Clean up if not options.no_clean: requirement_set.cleanup_files() wheel_cache.cleanup() if options.target_dir: self._handle_target_dir( options.target_dir, target_temp_dir, options.upgrade ) return requirement_set def _handle_target_dir(self, target_dir, target_temp_dir, upgrade): ensure_dir(target_dir) # Checking both purelib and platlib directories for installed # packages to be moved to target directory lib_dir_list = [] with target_temp_dir: # 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 _warn_about_conflicts(self, to_install): package_set, _dep_info = check_install_conflicts(to_install) missing, conflicting = _dep_info # NOTE: There is some duplication here from pip check for project_name in missing: version = package_set[project_name][0] for dependency in missing[project_name]: logger.critical( "%s %s requires %s, which is not installed.", project_name, version, dependency[1], ) for project_name in conflicting: version = package_set[project_name][0] for dep_name, dep_version, req in conflicting[project_name]: logger.critical( "%s %s has requirement %s, but you'll have %s %s which is " "incompatible.", project_name, version, req, dep_name, dep_version, ) def get_lib_location_guesses(*args, **kwargs): scheme = distutils_scheme('', *args, **kwargs) return [scheme['purelib'], scheme['platlib']] def create_env_error_message(error, show_traceback, using_user_site): """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"