"""Base Command class, and related routines"""
from __future__ import absolute_import, print_function
import logging
import logging.config
import optparse
import os
import platform
import sys
import traceback
from pip._internal.cli import cmdoptions
from pip._internal.cli.command_context import CommandContextMixIn
from pip._internal.cli.parser import (
ConfigOptionParser,
UpdatingDefaultsHelpFormatter,
)
from pip._internal.cli.status_codes import (
ERROR,
PREVIOUS_BUILD_DIR_ERROR,
UNKNOWN_ERROR,
VIRTUALENV_NOT_FOUND,
)
from pip._internal.exceptions import (
BadCommand,
CommandError,
InstallationError,
NetworkConnectionError,
PreviousBuildDirError,
SubProcessError,
UninstallationError,
)
from pip._internal.utils.deprecation import deprecated
from pip._internal.utils.filesystem import check_path_owner
from pip._internal.utils.logging import BrokenStdoutLoggingError, setup_logging
from pip._internal.utils.misc import get_prog, normalize_path
from pip._internal.utils.temp_dir import (
global_tempdir_manager,
tempdir_registry,
)
from pip._internal.utils.typing import MYPY_CHECK_RUNNING
from pip._internal.utils.virtualenv import running_under_virtualenv
if MYPY_CHECK_RUNNING:
from typing import List, Optional, Tuple, Any
from optparse import Values
from pip._internal.utils.temp_dir import (
TempDirectoryTypeRegistry as TempDirRegistry
)
__all__ = ['Command']
logger = logging.getLogger(__name__)
[docs]class Command(CommandContextMixIn):
usage = None # type: str
ignore_require_venv = False # type: bool
def __init__(self, name, summary, isolated=False):
# type: (str, str, bool) -> None
super(Command, self).__init__()
parser_kw = {
'usage': self.usage,
'prog': '{} {}'.format(get_prog(), name),
'formatter': UpdatingDefaultsHelpFormatter(),
'add_help_option': False,
'name': name,
'description': self.__doc__,
'isolated': isolated,
}
self.name = name
self.summary = summary
self.parser = ConfigOptionParser(**parser_kw)
self.tempdir_registry = None # type: Optional[TempDirRegistry]
# Commands should add options to this option group
optgroup_name = '{} Options'.format(self.name.capitalize())
self.cmd_opts = optparse.OptionGroup(self.parser, optgroup_name)
# Add the general options
gen_opts = cmdoptions.make_option_group(
cmdoptions.general_group,
self.parser,
)
self.parser.add_option_group(gen_opts)
self.add_options()
[docs] def add_options(self):
# type: () -> None
pass
[docs] def handle_pip_version_check(self, options):
# type: (Values) -> None
"""
This is a no-op so that commands by default do not do the pip version
check.
"""
# Make sure we do the pip version check if the index_group options
# are present.
assert not hasattr(options, 'no_index')
[docs] def run(self, options, args):
# type: (Values, List[Any]) -> int
raise NotImplementedError
[docs] def parse_args(self, args):
# type: (List[str]) -> Tuple[Any, Any]
# factored out for testability
return self.parser.parse_args(args)
[docs] def main(self, args):
# type: (List[str]) -> int
try:
with self.main_context():
return self._main(args)
finally:
logging.shutdown()
[docs] def _main(self, args):
# type: (List[str]) -> int
# We must initialize this before the tempdir manager, otherwise the
# configuration would not be accessible by the time we clean up the
# tempdir manager.
self.tempdir_registry = self.enter_context(tempdir_registry())
# Intentionally set as early as possible so globally-managed temporary
# directories are available to the rest of the code.
self.enter_context(global_tempdir_manager())
options, args = self.parse_args(args)
# Set verbosity so that it can be used elsewhere.
self.verbosity = options.verbose - options.quiet
level_number = setup_logging(
verbosity=self.verbosity,
no_color=options.no_color,
user_log_file=options.log,
)
if (
sys.version_info[:2] == (2, 7) and
not options.no_python_version_warning
):
message = (
"pip 21.0 will drop support for Python 2.7 in January 2021. "
"More details about Python 2 support in pip can be found at "
"https://pip.pypa.io/en/latest/development/release-process/#python-2-support" # noqa
)
if platform.python_implementation() == "CPython":
message = (
"Python 2.7 reached the end of its life on January "
"1st, 2020. Please upgrade your Python as Python 2.7 "
"is no longer maintained. "
) + message
deprecated(message, replacement=None, gone_in=None)
# TODO: Try to get these passing down from the command?
# without resorting to os.environ to hold these.
# This also affects isolated builds and it should.
if options.no_input:
os.environ['PIP_NO_INPUT'] = '1'
if options.exists_action:
os.environ['PIP_EXISTS_ACTION'] = ' '.join(options.exists_action)
if options.require_venv and not self.ignore_require_venv:
# If a venv is required check if it can really be found
if not running_under_virtualenv():
logger.critical(
'Could not find an activated virtualenv (required).'
)
sys.exit(VIRTUALENV_NOT_FOUND)
if options.cache_dir:
options.cache_dir = normalize_path(options.cache_dir)
if not check_path_owner(options.cache_dir):
logger.warning(
"The directory '%s' or its parent directory is not owned "
"or is not writable by the current user. The cache "
"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
if getattr(options, "build_dir", None):
deprecated(
reason=(
"The -b/--build/--build-dir/--build-directory "
"option is deprecated."
),
replacement=(
"use the TMPDIR/TEMP/TMP environment variable, "
"possibly combined with --no-clean"
),
gone_in="20.3",
issue=8333,
)
if 'resolver' in options.unstable_features:
logger.critical(
"--unstable-feature=resolver is no longer supported, and "
"has been replaced with --use-feature=2020-resolver instead."
)
sys.exit(ERROR)
try:
status = self.run(options, args)
assert isinstance(status, int)
return status
except PreviousBuildDirError as exc:
logger.critical(str(exc))
logger.debug('Exception information:', exc_info=True)
return PREVIOUS_BUILD_DIR_ERROR
except (InstallationError, UninstallationError, BadCommand,
SubProcessError, NetworkConnectionError) as exc:
logger.critical(str(exc))
logger.debug('Exception information:', exc_info=True)
return ERROR
except CommandError as exc:
logger.critical('%s', exc)
logger.debug('Exception information:', exc_info=True)
return ERROR
except BrokenStdoutLoggingError:
# Bypass our logger and write any remaining messages to stderr
# because stdout no longer works.
print('ERROR: Pipe to stdout was broken', file=sys.stderr)
if level_number <= logging.DEBUG:
traceback.print_exc(file=sys.stderr)
return ERROR
except KeyboardInterrupt:
logger.critical('Operation cancelled by user')
logger.debug('Exception information:', exc_info=True)
return ERROR
except BaseException:
logger.critical('Exception:', exc_info=True)
return UNKNOWN_ERROR
finally:
self.handle_pip_version_check(options)