Mercurial > repos > guerler > springsuite
comparison planemo/lib/python3.7/site-packages/virtualenv/discovery/discover.py @ 1:56ad4e20f292 draft
"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
| author | guerler |
|---|---|
| date | Fri, 31 Jul 2020 00:32:28 -0400 |
| parents | |
| children |
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| 0:d30785e31577 | 1:56ad4e20f292 |
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| 1 from __future__ import absolute_import, unicode_literals | |
| 2 | |
| 3 from abc import ABCMeta, abstractmethod | |
| 4 | |
| 5 from six import add_metaclass | |
| 6 | |
| 7 | |
| 8 @add_metaclass(ABCMeta) | |
| 9 class Discover(object): | |
| 10 """Discover and provide the requested Python interpreter""" | |
| 11 | |
| 12 @classmethod | |
| 13 def add_parser_arguments(cls, parser): | |
| 14 """Add CLI arguments for this discovery mechanisms. | |
| 15 | |
| 16 :param parser: the CLI parser | |
| 17 """ | |
| 18 raise NotImplementedError | |
| 19 | |
| 20 # noinspection PyUnusedLocal | |
| 21 def __init__(self, options): | |
| 22 """Create a new discovery mechanism. | |
| 23 | |
| 24 :param options: the parsed options as defined within :meth:`add_parser_arguments` | |
| 25 """ | |
| 26 self._has_run = False | |
| 27 self._interpreter = None | |
| 28 | |
| 29 @abstractmethod | |
| 30 def run(self): | |
| 31 """Discovers an interpreter. | |
| 32 | |
| 33 | |
| 34 :return: the interpreter ready to use for virtual environment creation | |
| 35 """ | |
| 36 raise NotImplementedError | |
| 37 | |
| 38 @property | |
| 39 def interpreter(self): | |
| 40 """ | |
| 41 :return: the interpreter as returned by :meth:`run`, cached | |
| 42 """ | |
| 43 if self._has_run is False: | |
| 44 self._interpreter = self.run() | |
| 45 self._has_run = True | |
| 46 return self._interpreter |