File Content: activators.py from __future__ import absolute_import, unicode_literals from argparse import ArgumentTypeError from collections import OrderedDict from .base import ComponentBuilder class ActivationSelector(ComponentBuilder): def __init__(self, interpreter, parser): self.default = None possible = OrderedDict( (k, v) for k, v in self.options("virtualenv.activate").items() if v.supports(interpreter) ) super(ActivationSelector, self).__init__(interpreter, parser, "activators", possible) self.parser.description = "options for activation scripts" self.active = None def add_selector_arg_parse(self, name, choices): self.default = ",".join(choices) self.parser.add_argument( "--{}".format(name), default=self.default, metavar="comma_sep_list", required=False, help="activators to generate - default is all supported", type=self._extract_activators, ) def _extract_activators(self, entered_str): elements = [e.strip() for e in entered_str.split(",") if e.strip()] missing = [e for e in elements if e not in self.possible] if missing: raise ArgumentTypeError("the following activators are not available {}".format(",".join(missing))) return elements def handle_selected_arg_parse(self, options): selected_activators = ( self._extract_activators(self.default) if options.activators is self.default else options.activators ) self.active = {k: v for k, v in self.possible.items() if k in selected_activators} self.parser.add_argument( "--prompt", dest="prompt", metavar="prompt", help=( "provides an alternative prompt prefix for this environment " "(value of . means name of the current working directory)" ), default=None, ) for activator in self.active.values(): activator.add_parser_arguments(self.parser, self.interpreter) def create(self, options): return [activator_class(options) for activator_class in self.active.values()] Submit