from __future__ import absolute_import
import pip
from pip.wheel import WheelCache
from pip.req import InstallRequirement, RequirementSet, parse_requirements
from pip.basecommand import Command
from pip.exceptions import InstallationError
class UninstallCommand(Command):
"""
Uninstall packages.
pip is able to uninstall most installed packages. Known exceptions are:
- Pure distutils packages installed with ``python setup.py install``, which
leave behind no metadata to determine what files were installed.
- Script wrappers installed by ``python setup.py develop``.
"""
name = 'uninstall'
usage = """
%prog [options] <package> ...
%prog [options] -r <requirements file> ..."""
summary = 'Uninstall packages.'
def __init__(self, *args, **kw):
super(UninstallCommand, self).__init__(*args, **kw)
self.cmd_opts.add_option(
'-r', '--requirement',
dest='requirements',
action='append',
default=[],
metavar='file',
help='Uninstall all the packages listed in the given requirements '
'file. This option can be used multiple times.',
)
self.cmd_opts.add_option(
'-y', '--yes',
dest='yes',
action='store_true',
help="Don't ask for confirmation of uninstall deletions.")
self.parser.insert_option_group(0, self.cmd_opts)
def run(self, options, args):
with self._build_session(options) as session:
format_control = pip.index.FormatControl(set(), set())
wheel_cache = WheelCache(options.cache_dir, format_control)
requirement_set = RequirementSet(
build_dir=None,
src_dir=None,
download_dir=None,
isolated=options.isolated_mode,
session=session,
wheel_cache=wheel_cache,
)
for name in args:
requirement_set.add_requirement(
InstallRequirement.from_line(
name, isolated=options.isolated_mode,
wheel_cache=wheel_cache
)
)
for filename in options.requirements:
for req in parse_requirements(
filename,
options=options,
session=session,
wheel_cache=wheel_cache):
requirement_set.add_requirement(req)
if not requirement_set.has_requirements:
raise InstallationError(
'You must give at least one requirement to %(name)s (see '
'"pip help %(name)s")' % dict(name=self.name)
)
requirement_set.uninstall(auto_confirm=options.yes)