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comparison lib/python3.8/site-packages/setuptools/_imp.py @ 0:9e54283cc701 draft

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"planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
author guerler
date Mon, 27 Jul 2020 03:47:31 -0400
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-1:000000000000 0:9e54283cc701
1 """
2 Re-implementation of find_module and get_frozen_object
3 from the deprecated imp module.
4 """
5
6 import os
7 import importlib.util
8 import importlib.machinery
9
10 from .py34compat import module_from_spec
11
12
13 PY_SOURCE = 1
14 PY_COMPILED = 2
15 C_EXTENSION = 3
16 C_BUILTIN = 6
17 PY_FROZEN = 7
18
19
20 def find_spec(module, paths):
21 finder = (
22 importlib.machinery.PathFinder().find_spec
23 if isinstance(paths, list) else
24 importlib.util.find_spec
25 )
26 return finder(module, paths)
27
28
29 def find_module(module, paths=None):
30 """Just like 'imp.find_module()', but with package support"""
31 spec = find_spec(module, paths)
32 if spec is None:
33 raise ImportError("Can't find %s" % module)
34 if not spec.has_location and hasattr(spec, 'submodule_search_locations'):
35 spec = importlib.util.spec_from_loader('__init__.py', spec.loader)
36
37 kind = -1
38 file = None
39 static = isinstance(spec.loader, type)
40 if spec.origin == 'frozen' or static and issubclass(
41 spec.loader, importlib.machinery.FrozenImporter):
42 kind = PY_FROZEN
43 path = None # imp compabilty
44 suffix = mode = '' # imp compability
45 elif spec.origin == 'built-in' or static and issubclass(
46 spec.loader, importlib.machinery.BuiltinImporter):
47 kind = C_BUILTIN
48 path = None # imp compabilty
49 suffix = mode = '' # imp compability
50 elif spec.has_location:
51 path = spec.origin
52 suffix = os.path.splitext(path)[1]
53 mode = 'r' if suffix in importlib.machinery.SOURCE_SUFFIXES else 'rb'
54
55 if suffix in importlib.machinery.SOURCE_SUFFIXES:
56 kind = PY_SOURCE
57 elif suffix in importlib.machinery.BYTECODE_SUFFIXES:
58 kind = PY_COMPILED
59 elif suffix in importlib.machinery.EXTENSION_SUFFIXES:
60 kind = C_EXTENSION
61
62 if kind in {PY_SOURCE, PY_COMPILED}:
63 file = open(path, mode)
64 else:
65 path = None
66 suffix = mode = ''
67
68 return file, path, (suffix, mode, kind)
69
70
71 def get_frozen_object(module, paths=None):
72 spec = find_spec(module, paths)
73 if not spec:
74 raise ImportError("Can't find %s" % module)
75 return spec.loader.get_code(module)
76
77
78 def get_module(module, paths, info):
79 spec = find_spec(module, paths)
80 if not spec:
81 raise ImportError("Can't find %s" % module)
82 return module_from_spec(spec)