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