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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)