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78 lines
3.4 KiB
Python
78 lines
3.4 KiB
Python
5 years ago
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from __future__ import absolute_import, unicode_literals
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from collections import OrderedDict, defaultdict, namedtuple
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from virtualenv.create.describe import Describe
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from virtualenv.create.via_global_ref.builtin.builtin_way import VirtualenvBuiltin
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from .base import ComponentBuilder
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CreatorInfo = namedtuple("CreatorInfo", ["key_to_class", "key_to_meta", "describe", "builtin_key"])
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class CreatorSelector(ComponentBuilder):
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def __init__(self, interpreter, parser):
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creators, self.key_to_meta, self.describe, self.builtin_key = self.for_interpreter(interpreter)
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super(CreatorSelector, self).__init__(interpreter, parser, "creator", creators)
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@classmethod
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def for_interpreter(cls, interpreter):
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key_to_class, key_to_meta, builtin_key, describe = OrderedDict(), {}, None, None
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errored = defaultdict(list)
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for key, creator_class in cls.options("virtualenv.create").items():
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if key == "builtin":
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raise RuntimeError("builtin creator is a reserved name")
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meta = creator_class.can_create(interpreter)
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if meta:
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if meta.error:
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errored[meta.error].append(creator_class)
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else:
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if "builtin" not in key_to_class and issubclass(creator_class, VirtualenvBuiltin):
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builtin_key = key
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key_to_class["builtin"] = creator_class
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key_to_meta["builtin"] = meta
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key_to_class[key] = creator_class
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key_to_meta[key] = meta
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if describe is None and issubclass(creator_class, Describe) and creator_class.can_describe(interpreter):
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describe = creator_class
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if not key_to_meta:
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if errored:
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raise RuntimeError(
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"\n".join(
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"{} for creators {}".format(k, ", ".join(i.__name__ for i in v)) for k, v in errored.items()
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),
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)
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else:
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raise RuntimeError("No virtualenv implementation for {}".format(interpreter))
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return CreatorInfo(
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key_to_class=key_to_class, key_to_meta=key_to_meta, describe=describe, builtin_key=builtin_key,
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)
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def add_selector_arg_parse(self, name, choices):
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# prefer the built-in venv if present, otherwise fallback to first defined type
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choices = sorted(choices, key=lambda a: 0 if a == "builtin" else 1)
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default_value = self._get_default(choices)
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self.parser.add_argument(
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"--{}".format(name),
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choices=choices,
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default=default_value,
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required=False,
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help="create environment via{}".format(
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"" if self.builtin_key is None else " (builtin = {})".format(self.builtin_key),
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),
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)
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@staticmethod
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def _get_default(choices):
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return next(iter(choices))
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def populate_selected_argparse(self, selected, app_data):
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self.parser.description = "options for {} {}".format(self.name, selected)
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self._impl_class.add_parser_arguments(self.parser, self.interpreter, self.key_to_meta[selected], app_data)
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def create(self, options):
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options.meta = self.key_to_meta[getattr(options, self.name)]
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if not issubclass(self._impl_class, Describe):
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options.describe = self.describe(options, self.interpreter)
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return super(CreatorSelector, self).create(options)
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