Mercurial > repos > shellac > sam_consensus_v3
comparison env/lib/python3.9/site-packages/virtualenv/discovery/discover.py @ 0:4f3585e2f14b draft default tip
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author | shellac |
---|---|
date | Mon, 22 Mar 2021 18:12:50 +0000 |
parents | |
children |
comparison
equal
deleted
inserted
replaced
-1:000000000000 | 0:4f3585e2f14b |
---|---|
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 self._env = options.env | |
29 | |
30 @abstractmethod | |
31 def run(self): | |
32 """Discovers an interpreter. | |
33 | |
34 | |
35 :return: the interpreter ready to use for virtual environment creation | |
36 """ | |
37 raise NotImplementedError | |
38 | |
39 @property | |
40 def interpreter(self): | |
41 """ | |
42 :return: the interpreter as returned by :meth:`run`, cached | |
43 """ | |
44 if self._has_run is False: | |
45 self._interpreter = self.run() | |
46 self._has_run = True | |
47 return self._interpreter |