venv/Lib/site-packages/pip/commands/uninstall.py

   1 from __future__ import absolute_import
   2
   3 import pip
   4 from pip.wheel import WheelCache
   5 from pip.req import InstallRequirement, RequirementSet, parse_requirements
   6 from pip.basecommand import Command
   7 from pip.exceptions import InstallationError
   8
   9
  10 class UninstallCommand(Command):
  11     """
  12     Uninstall packages.
  13
  14     pip is able to uninstall most installed packages. Known exceptions are:
  15
  16     - Pure distutils packages installed with ``python setup.py install``, which
  17       leave behind no metadata to determine what files were installed.
  18     - Script wrappers installed by ``python setup.py develop``.
  19     """
  20     name = 'uninstall'
  21     usage = """
  22       %prog [options] <package> ...
  23       %prog [options] -r <requirements file> ..."""
  24     summary = 'Uninstall packages.'
  25
  26     def __init__(self, *args, **kw):
  27         super(UninstallCommand, self).__init__(*args, **kw)
  28         self.cmd_opts.add_option(
  29             '-r', '--requirement',
  30             dest='requirements',
  31             action='append',
  32             default=[],
  33             metavar='file',
  34             help='Uninstall all the packages listed in the given requirements '
  35                  'file.  This option can be used multiple times.',
  36         )
  37         self.cmd_opts.add_option(
  38             '-y', '--yes',
  39             dest='yes',
  40             action='store_true',
  41             help="Don't ask for confirmation of uninstall deletions.")
  42
  43         self.parser.insert_option_group(0, self.cmd_opts)
  44
  45     def run(self, options, args):
  46         with self._build_session(options) as session:
  47             format_control = pip.index.FormatControl(set(), set())
  48             wheel_cache = WheelCache(options.cache_dir, format_control)
  49             requirement_set = RequirementSet(
  50                 build_dir=None,
  51                 src_dir=None,
  52                 download_dir=None,
  53                 isolated=options.isolated_mode,
  54                 session=session,
  55                 wheel_cache=wheel_cache,
  56             )
  57             for name in args:
  58                 requirement_set.add_requirement(
  59                     InstallRequirement.from_line(
  60                         name, isolated=options.isolated_mode,
  61                         wheel_cache=wheel_cache
  62                     )
  63                 )
  64             for filename in options.requirements:
  65                 for req in parse_requirements(
  66                         filename,
  67                         options=options,
  68                         session=session,
  69                         wheel_cache=wheel_cache):
  70                     requirement_set.add_requirement(req)
  71             if not requirement_set.has_requirements:
  72                 raise InstallationError(
  73                     'You must give at least one requirement to %(name)s (see '
  74                     '"pip help %(name)s")' % dict(name=self.name)
  75                 )
  76             requirement_set.uninstall(auto_confirm=options.yes)