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import logging from optparse import Values from typing import Any, Iterable, List, Optional, Union from pip._vendor.packaging.version import LegacyVersion, Version from pip._internal.cli import cmdoptions from pip._internal.cli.req_command import IndexGroupCommand from pip._internal.cli.status_codes import ERROR, SUCCESS from pip._internal.commands.search import print_dist_installation_info from pip._internal.exceptions import CommandError, DistributionNotFound, PipError from pip._internal.index.collector import LinkCollector from pip._internal.index.package_finder import PackageFinder from pip._internal.models.selection_prefs import SelectionPreferences from pip._internal.models.target_python import TargetPython from pip._internal.network.session import PipSession from pip._internal.utils.misc import write_output logger = logging.getLogger(__name__) class IndexCommand(IndexGroupCommand): """ Inspect information available from package indexes. """ ignore_require_venv = True usage = """ %prog versions <package> """ def add_options(self) -> None: cmdoptions.add_target_python_options(self.cmd_opts) self.cmd_opts.add_option(cmdoptions.ignore_requires_python()) self.cmd_opts.add_option(cmdoptions.pre()) self.cmd_opts.add_option(cmdoptions.no_binary()) self.cmd_opts.add_option(cmdoptions.only_binary()) 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) def run(self, options: Values, args: List[str]) -> int: handlers = { "versions": self.get_available_package_versions, } logger.warning( "pip index is currently an experimental command. " "It may be removed/changed in a future release " "without prior warning." ) # Determine action if not args or args[0] not in handlers: logger.error( "Need an action (%s) to perform.", ", ".join(sorted(handlers)), ) return ERROR action = args[0] # Error handling happens here, not in the action-handlers. try: handlers[action](options, args[1:]) except PipError as e: logger.error(e.args[0]) return ERROR return SUCCESS def _build_package_finder( self, options: Values, session: PipSession, target_python: Optional[TargetPython] = None, ignore_requires_python: Optional[bool] = None, ) -> PackageFinder: """ Create a package finder appropriate to the index command. """ link_collector = LinkCollector.create(session, options=options) # Pass allow_yanked=False to ignore yanked versions. selection_prefs = SelectionPreferences( allow_yanked=False, allow_all_prereleases=options.pre, ignore_requires_python=ignore_requires_python, ) return PackageFinder.create( link_collector=link_collector, selection_prefs=selection_prefs, target_python=target_python, ) def get_available_package_versions(self, options: Values, args: List[Any]) -> None: if len(args) != 1: raise CommandError("You need to specify exactly one argument") target_python = cmdoptions.make_target_python(options) query = args[0] with self._build_session(options) as session: finder = self._build_package_finder( options=options, session=session, target_python=target_python, ignore_requires_python=options.ignore_requires_python, ) versions: Iterable[Union[LegacyVersion, Version]] = ( candidate.version for candidate in finder.find_all_candidates(query) ) if not options.pre: # Remove prereleases versions = ( version for version in versions if not version.is_prerelease ) versions = set(versions) if not versions: raise DistributionNotFound( "No matching distribution found for {}".format(query) ) formatted_versions = [str(ver) for ver in sorted(versions, reverse=True)] latest = formatted_versions[0] write_output("{} ({})".format(query, latest)) write_output("Available versions: {}".format(", ".join(formatted_versions))) print_dist_installation_info(query, latest)