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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):
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)