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from __future__ import absolute_import
import logging
import os
import textwrap
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.typing import MYPY_CHECK_RUNNING
if MYPY_CHECK_RUNNING:
from optparse import Values
from typing import Any, List
logger = logging.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):
# type: () -> 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, args):
# type: (Values, List[Any]) -> 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, args):
# type: (Values, List[Any]) -> None
if args:
raise CommandError('Too many arguments')
logger.info(options.cache_dir)
def get_cache_info(self, options, args):
# type: (Values, 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, args):
# type: (Values, 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):
# type: (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(' - {} ({})'.format(wheel, size))
logger.info('Cache contents:\n')
logger.info('\n'.join(sorted(results)))
def format_for_abspath(self, files):
# type: (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, args):
# type: (Values, 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])
# Only fetch http files if no specific pattern given
if args[0] == '*':
files += self._find_http_files(options)
if not files:
raise CommandError('No matching packages')
for filename in files:
os.unlink(filename)
logger.debug('Removed %s', filename)
logger.info('Files removed: %s', len(files))
def purge_cache(self, options, args):
# type: (Values, List[Any]) -> None
if args:
raise CommandError('Too many arguments')
return self.remove_cache_items(options, ['*'])
def _cache_dir(self, options, subdir):
# type: (Values, str) -> str
return os.path.join(options.cache_dir, subdir)
def _find_http_files(self, options):
# type: (Values) -> List[str]
http_dir = self._cache_dir(options, 'http')
return filesystem.find_files(http_dir, '*')
def _find_wheels(self, options, pattern):
# type: (Values, 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)
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