← Back
Editing: cache.py
import os import textwrap from optparse import Values from typing import Any, List import pip._internal.utils.filesystem as filesystem from pip._internal.cli.base_command import Command from pip._internal.cli.status_codes import ERROR, SUCCESS from pip._internal.exceptions import CommandError, PipError from pip._internal.utils.logging import getLogger logger = getLogger(__name__) class CacheCommand(Command): """ Inspect and manage pip's wheel cache. Subcommands: - dir: Show the cache directory. - info: Show information about the cache. - list: List filenames of packages stored in the cache. - remove: Remove one or more package from the cache. - purge: Remove all items from the cache. ``<pattern>`` can be a glob expression or a package name. """ ignore_require_venv = True usage = """ %prog dir %prog info %prog list [<pattern>] [--format=[human, abspath]] %prog remove <pattern> %prog purge """ def add_options(self) -> None: self.cmd_opts.add_option( "--format", action="store", dest="list_format", default="human", choices=("human", "abspath"), help="Select the output format among: human (default) or abspath", ) self.parser.insert_option_group(0, self.cmd_opts) def run(self, options: Values, args: List[str]) -> int: handlers = { "dir": self.get_cache_dir, "info": self.get_cache_info, "list": self.list_cache_items, "remove": self.remove_cache_items, "purge": self.purge_cache, } if not options.cache_dir: logger.error("pip cache commands can not function since cache is disabled.") return ERROR # 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 get_cache_dir(self, options: Values, args: List[Any]) -> None: if args: raise CommandError("Too many arguments") logger.info(options.cache_dir) def get_cache_info(self, options: Values, args: List[Any]) -> None: if args: raise CommandError("Too many arguments") num_http_files = len(self._find_http_files(options)) num_packages = len(self._find_wheels(options, "*")) http_cache_location = self._cache_dir(options, "http") wheels_cache_location = self._cache_dir(options, "wheels") http_cache_size = filesystem.format_directory_size(http_cache_location) wheels_cache_size = filesystem.format_directory_size(wheels_cache_location) message = ( textwrap.dedent( """ Package index page cache location: {http_cache_location} Package index page cache size: {http_cache_size} Number of HTTP files: {num_http_files} Wheels location: {wheels_cache_location} Wheels size: {wheels_cache_size} Number of wheels: {package_count} """ ) .format( http_cache_location=http_cache_location, http_cache_size=http_cache_size, num_http_files=num_http_files, wheels_cache_location=wheels_cache_location, package_count=num_packages, wheels_cache_size=wheels_cache_size, ) .strip() ) logger.info(message) def list_cache_items(self, options: Values, args: List[Any]) -> None: if len(args) > 1: raise CommandError("Too many arguments") if args: pattern = args[0] else: pattern = "*" files = self._find_wheels(options, pattern) if options.list_format == "human": self.format_for_human(files) else: self.format_for_abspath(files) def format_for_human(self, files: List[str]) -> None: if not files: logger.info("Nothing cached.") return results = [] for filename in files: wheel = os.path.basename(filename) size = filesystem.format_file_size(filename) results.append(f" - {wheel} ({size})") logger.info("Cache contents:\n") logger.info("\n".join(sorted(results))) def format_for_abspath(self, files: List[str]) -> None: if not files: return results = [] for filename in files: results.append(filename) logger.info("\n".join(sorted(results))) def remove_cache_items(self, options: Values, args: List[Any]) -> None: if len(args) > 1: raise CommandError("Too many arguments") if not args: raise CommandError("Please provide a pattern") files = self._find_wheels(options, args[0]) no_matching_msg = "No matching packages" if args[0] == "*": # Only fetch http files if no specific pattern given files += self._find_http_files(options) else: # Add the pattern to the log message no_matching_msg += ' for pattern "{}"'.format(args[0]) if not files: logger.warning(no_matching_msg) for filename in files: os.unlink(filename) logger.verbose("Removed %s", filename) logger.info("Files removed: %s", len(files)) def purge_cache(self, options: Values, args: List[Any]) -> None: if args: raise CommandError("Too many arguments") return self.remove_cache_items(options, ["*"]) def _cache_dir(self, options: Values, subdir: str) -> str: return os.path.join(options.cache_dir, subdir) def _find_http_files(self, options: Values) -> List[str]: http_dir = self._cache_dir(options, "http") return filesystem.find_files(http_dir, "*") def _find_wheels(self, options: Values, pattern: str) -> List[str]: wheel_dir = self._cache_dir(options, "wheels") # The wheel filename format, as specified in PEP 427, is: # {distribution}-{version}(-{build})?-{python}-{abi}-{platform}.whl # # Additionally, non-alphanumeric values in the distribution are # normalized to underscores (_), meaning hyphens can never occur # before `-{version}`. # # Given that information: # - If the pattern we're given contains a hyphen (-), the user is # providing at least the version. Thus, we can just append `*.whl` # to match the rest of it. # - If the pattern we're given doesn't contain a hyphen (-), the # user is only providing the name. Thus, we append `-*.whl` to # match the hyphen before the version, followed by anything else. # # PEP 427: https://www.python.org/dev/peps/pep-0427/ pattern = pattern + ("*.whl" if "-" in pattern else "-*.whl") return filesystem.find_files(wheel_dir, pattern)
Save File
Cancel