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install.py
from __future__ import absolute_import import logging import operator import os import tempfile import shutil import warnings import sys from os import path try: import wheel except ImportError: wheel = None from pip.req import RequirementSet from pip.basecommand import RequirementCommand from pip.locations import virtualenv_no_global, distutils_scheme from pip.exceptions import ( InstallationError, CommandError, PreviousBuildDirError, ) from pip import cmdoptions from pip.utils import ensure_dir, get_installed_version from pip.utils.build import BuildDirectory from pip.utils.deprecation import RemovedInPip10Warning from pip.utils.filesystem import check_path_owner from pip.wheel import WheelCache, WheelBuilder 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] <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> ...""" summary = 'Install packages.' def __init__(self, *args, **kw): super(InstallCommand, self).__init__(*args, **kw) cmd_opts = self.cmd_opts cmd_opts.add_option(cmdoptions.constraints()) cmd_opts.add_option(cmdoptions.editable()) cmd_opts.add_option(cmdoptions.requirements()) cmd_opts.add_option(cmdoptions.build_dir()) 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.' ) cmd_opts.add_option( '-d', '--download', '--download-dir', '--download-directory', dest='download_dir', metavar='dir', default=None, help=("Download packages into <dir> instead of installing them, " "regardless of what's already installed."), ) 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='eager', choices=['only-if-needed', 'eager'], help='Determines how dependency upgrading should be handled. ' '"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='When upgrading, 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_deps()) cmd_opts.add_option(cmdoptions.install_options()) cmd_opts.add_option(cmdoptions.global_options()) 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.)") cmd_opts.add_option( '--egg', dest='as_egg', action='store_true', help="Install packages as eggs, not 'flat', like pip normally " "does. This option is not about installing *from* eggs. " "(WARNING: Because this option overrides pip's normal install" " logic, requirements files may not behave as expected.)") 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( '--strip-file-prefix', dest='strip_file_prefix', metavar='prefix', default=None, help="Strip given prefix from script paths in wheel RECORD." ) 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( "--compile", action="store_true", dest="compile", default=True, help="Compile py files to pyc", ) cmd_opts.add_option( "--no-compile", action="store_false", dest="compile", help="Do not compile py files to pyc", ) cmd_opts.add_option(cmdoptions.use_wheel()) cmd_opts.add_option(cmdoptions.no_use_wheel()) cmd_opts.add_option(cmdoptions.no_binary()) cmd_opts.add_option(cmdoptions.only_binary()) cmd_opts.add_option(cmdoptions.pre()) cmd_opts.add_option(cmdoptions.no_clean()) cmd_opts.add_option(cmdoptions.require_hashes()) 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.resolve_wheel_no_use_binary(options) 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(): logger.warning( "WARNING: Running pip install with root privileges is " "generally not a good idea. Try `%s install --user` instead." % path.basename(sys.argv[0]) ) if options.as_egg: warnings.warn( "--egg has been deprecated and will be removed in the future. " "This flag is mutually exclusive with large parts of pip, and " "actually using it invalidates pip's ability to manage the " "installation process.", RemovedInPip10Warning, ) if options.allow_external: warnings.warn( "--allow-external has been deprecated and will be removed in " "the future. Due to changes in the repository protocol, it no " "longer has any effect.", RemovedInPip10Warning, ) if options.allow_all_external: warnings.warn( "--allow-all-external has been deprecated and will be removed " "in the future. Due to changes in the repository protocol, it " "no longer has any effect.", RemovedInPip10Warning, ) if options.allow_unverified: warnings.warn( "--allow-unverified has been deprecated and will be removed " "in the future. Due to changes in the repository protocol, it " "no longer has any effect.", RemovedInPip10Warning, ) if options.download_dir: warnings.warn( "pip install --download has been deprecated and will be " "removed in the future. Pip now has a download command that " "should be used instead.", RemovedInPip10Warning, ) options.ignore_installed = True if options.build_dir: options.build_dir = os.path.abspath(options.build_dir) 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=') temp_target_dir = None if options.target_dir: options.ignore_installed = True temp_target_dir = tempfile.mkdtemp() 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." ) install_options.append('--home=' + temp_target_dir) global_options = options.global_options or [] with self._build_session(options) as session: finder = self._build_package_finder(options, session) 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 BuildDirectory(options.build_dir, delete=build_delete) as build_dir: requirement_set = RequirementSet( build_dir=build_dir, src_dir=options.src_dir, download_dir=options.download_dir, upgrade=options.upgrade, upgrade_strategy=options.upgrade_strategy, as_egg=options.as_egg, ignore_installed=options.ignore_installed, ignore_dependencies=options.ignore_dependencies, ignore_requires_python=options.ignore_requires_python, force_reinstall=options.force_reinstall, use_user_site=options.use_user_site, target_dir=temp_target_dir, session=session, pycompile=options.compile, isolated=options.isolated_mode, wheel_cache=wheel_cache, require_hashes=options.require_hashes, ) self.populate_requirement_set( requirement_set, args, options, finder, session, self.name, wheel_cache ) if not requirement_set.has_requirements: return try: if (options.download_dir or not wheel or not options.cache_dir): # on -d don't do complex things like building # wheels, and don't try to build wheels when wheel is # not installed. requirement_set.prepare_files(finder) else: # build wheels before install. wb = WheelBuilder( requirement_set, finder, build_options=[], global_options=[], ) # Ignore the result: a failed wheel will be # installed from the sdist/vcs whatever. wb.build(autobuilding=True) if not options.download_dir: requirement_set.install( install_options, global_options, root=options.root_path, prefix=options.prefix_path, strip_file_prefix=options.strip_file_prefix, ) possible_lib_locations = get_lib_location_guesses( user=options.use_user_site, home=temp_target_dir, root=options.root_path, prefix=options.prefix_path, isolated=options.isolated_mode, ) reqs = sorted( requirement_set.successfully_installed, key=operator.attrgetter('name')) items = [] for req in reqs: item = req.name try: installed_version = get_installed_version( req.name, possible_lib_locations ) if installed_version: item += '-' + installed_version except Exception: pass items.append(item) installed = ' '.join(items) if installed: logger.info('Successfully installed %s', installed) else: downloaded = ' '.join([ req.name for req in requirement_set.successfully_downloaded ]) if downloaded: logger.info( 'Successfully downloaded %s', downloaded ) except PreviousBuildDirError: options.no_clean = True raise finally: # Clean up if not options.no_clean: requirement_set.cleanup_files() if options.target_dir: ensure_dir(options.target_dir) # Checking both purelib and platlib directories for installed # packages to be moved to target directory lib_dir_list = [] purelib_dir = distutils_scheme('', home=temp_target_dir)['purelib'] platlib_dir = distutils_scheme('', home=temp_target_dir)['platlib'] 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) for lib_dir in lib_dir_list: for item in os.listdir(lib_dir): target_item_dir = os.path.join(options.target_dir, item) if os.path.exists(target_item_dir): if not options.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 ) shutil.rmtree(temp_target_dir) return requirement_set def get_lib_location_guesses(*args, **kwargs): scheme = distutils_scheme('', *args, **kwargs) return [scheme['purelib'], scheme['platlib']]
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