Viewing file:  activators.py (2.17 KB) -rw-r--r--
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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()]
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