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