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] ... %prog [options] -r ...""" 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): session = self._build_session(options) requirement_set = RequirementSet( build_dir=None, src_dir=None, download_dir=None, session=session, ) for name in args: requirement_set.add_requirement( InstallRequirement.from_line(name)) for filename in options.requirements: for req in parse_requirements(filename, options=options, session=session): 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)