forked from s_ranjbar/city_retrofit
83 lines
2.3 KiB
Python
83 lines
2.3 KiB
Python
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"""
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Re-implementation of find_module and get_frozen_object
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from the deprecated imp module.
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"""
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import os
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import importlib.util
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import importlib.machinery
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from .py34compat import module_from_spec
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PY_SOURCE = 1
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PY_COMPILED = 2
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C_EXTENSION = 3
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C_BUILTIN = 6
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PY_FROZEN = 7
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def find_spec(module, paths):
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finder = (
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importlib.machinery.PathFinder().find_spec
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if isinstance(paths, list) else
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importlib.util.find_spec
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)
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return finder(module, paths)
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def find_module(module, paths=None):
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"""Just like 'imp.find_module()', but with package support"""
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spec = find_spec(module, paths)
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if spec is None:
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raise ImportError("Can't find %s" % module)
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if not spec.has_location and hasattr(spec, 'submodule_search_locations'):
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spec = importlib.util.spec_from_loader('__init__.py', spec.loader)
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kind = -1
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file = None
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static = isinstance(spec.loader, type)
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if spec.origin == 'frozen' or static and issubclass(
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spec.loader, importlib.machinery.FrozenImporter):
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kind = PY_FROZEN
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path = None # imp compabilty
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suffix = mode = '' # imp compatibility
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elif spec.origin == 'built-in' or static and issubclass(
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spec.loader, importlib.machinery.BuiltinImporter):
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kind = C_BUILTIN
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path = None # imp compabilty
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suffix = mode = '' # imp compatibility
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elif spec.has_location:
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path = spec.origin
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suffix = os.path.splitext(path)[1]
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mode = 'r' if suffix in importlib.machinery.SOURCE_SUFFIXES else 'rb'
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if suffix in importlib.machinery.SOURCE_SUFFIXES:
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kind = PY_SOURCE
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elif suffix in importlib.machinery.BYTECODE_SUFFIXES:
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kind = PY_COMPILED
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elif suffix in importlib.machinery.EXTENSION_SUFFIXES:
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kind = C_EXTENSION
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if kind in {PY_SOURCE, PY_COMPILED}:
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file = open(path, mode)
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else:
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path = None
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suffix = mode = ''
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return file, path, (suffix, mode, kind)
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def get_frozen_object(module, paths=None):
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spec = find_spec(module, paths)
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if not spec:
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raise ImportError("Can't find %s" % module)
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return spec.loader.get_code(module)
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def get_module(module, paths, info):
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spec = find_spec(module, paths)
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if not spec:
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raise ImportError("Can't find %s" % module)
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return module_from_spec(spec)
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