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Issue #13959: Re-implement imp.get_suffixes() in Lib/imp.py.

Browse source 
This introduces a new function, imp.extension_suffixes(), which is
currently undocumented. That is forthcoming once issue #14657 is
resolved and how to expose file suffixes is decided.
This commit is contained in:
Brett Cannon 2012-05-04 15:20:40 -04:00
parent 17098a5447
commit 2657df4744
19 changed files with 2971 additions and 3171 deletions
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45
Lib/importlib/_bootstrap.py
View file

@ -95,16 +95,6 @@ def _path_split(path):
return front, tail
def _path_exists(path):
"""Replacement for os.path.exists."""
try:
_os.stat(path)
except OSError:
return False
else:
return True
def _path_is_mode_type(path, mode):
"""Test whether the path is the specified mode type."""
try:
@ -128,28 +118,6 @@ def _path_isdir(path):
return _path_is_mode_type(path, 0o040000)
def _path_without_ext(path, ext_type):
"""Replacement for os.path.splitext()[0]."""
for suffix in _suffix_list(ext_type):
if path.endswith(suffix):
return path[:-len(suffix)]
else:
raise ValueError("path is not of the specified type")
def _path_absolute(path):
"""Replacement for os.path.abspath."""
if not path:
path = _os.getcwd()
try:
return _os._getfullpathname(path)
except AttributeError:
if path.startswith('/'):
return path
else:
return _path_join(_os.getcwd(), path)
def _write_atomic(path, data):
"""Best-effort function to write data to a path atomically.
Be prepared to handle a FileExistsError if concurrent writing of the
@ -338,12 +306,6 @@ def _requires_frozen(fxn):
return _requires_frozen_wrapper
def _suffix_list(suffix_type):
"""Return a list of file suffixes based on the imp file type."""
return [suffix[0] for suffix in _imp.get_suffixes()
if suffix[2] == suffix_type]
# Loaders #####################################################################
class BuiltinImporter:
@ -1196,8 +1158,9 @@ def _install(sys_module, _imp_module):
"""
_setup(sys_module, _imp_module)
supported_loaders = [(ExtensionFileLoader, _suffix_list(3), False),
(SourceFileLoader, _suffix_list(1), True),
(SourcelessFileLoader, _suffix_list(2), True)]
extensions = ExtensionFileLoader, _imp_module.extension_suffixes(), False
source = SourceFileLoader, _SOURCE_SUFFIXES, True
bytecode = SourcelessFileLoader, [_BYTECODE_SUFFIX], True
supported_loaders = [extensions, source, bytecode]
sys.path_hooks.extend([FileFinder.path_hook(*supported_loaders)])
sys.meta_path.extend([BuiltinImporter, FrozenImporter, PathFinder])

2
Lib/importlib/test/extension/test_case_sensitivity.py
View file

@ -16,7 +16,7 @@ class ExtensionModuleCaseSensitivityTest(unittest.TestCase):
assert good_name != bad_name
finder = _bootstrap.FileFinder(ext_util.PATH,
(_bootstrap.ExtensionFileLoader,
_bootstrap._suffix_list(imp.C_EXTENSION),
imp.extension_suffixes(),
False))
return finder.find_module(bad_name)

2
Lib/importlib/test/extension/test_finder.py
View file

@ -12,7 +12,7 @@ class FinderTests(abc.FinderTests):
def find_module(self, fullname):
importer = _bootstrap.FileFinder(util.PATH,
(_bootstrap.ExtensionFileLoader,
_bootstrap._suffix_list(imp.C_EXTENSION),
imp.extension_suffixes(),
False))
return importer.find_module(fullname)

2
Lib/importlib/test/extension/test_path_hook.py
View file

@ -15,7 +15,7 @@ class PathHookTests(unittest.TestCase):
def hook(self, entry):
return _bootstrap.FileFinder.path_hook((_bootstrap.ExtensionFileLoader,
_bootstrap._suffix_list(imp.C_EXTENSION), False))(entry)
imp.extension_suffixes(), False))(entry)
def test_success(self):
# Path hook should handle a directory where a known extension module

4
Lib/importlib/test/source/test_case_sensitivity.py
View file

@ -22,10 +22,10 @@ class CaseSensitivityTest(unittest.TestCase):
def find(self, path):
finder = _bootstrap.FileFinder(path,
(_bootstrap.SourceFileLoader,
_bootstrap._suffix_list(imp.PY_SOURCE),
_bootstrap._SOURCE_SUFFIXES,
True),
(_bootstrap.SourcelessFileLoader,
_bootstrap._suffix_list(imp.PY_COMPILED),
[_bootstrap._BYTECODE_SUFFIX],
True))
return finder.find_module(self.name)

8
Lib/importlib/test/source/test_finder.py
View file

@ -37,9 +37,9 @@ class FinderTests(abc.FinderTests):
def import_(self, root, module):
loader_details = [(_bootstrap.SourceFileLoader,
_bootstrap._suffix_list(imp.PY_SOURCE), True),
_bootstrap._SOURCE_SUFFIXES, True),
(_bootstrap.SourcelessFileLoader,
_bootstrap._suffix_list(imp.PY_COMPILED), True)]
[_bootstrap._BYTECODE_SUFFIX], True)]
finder = _bootstrap.FileFinder(root, *loader_details)
return finder.find_module(module)
@ -139,7 +139,7 @@ class FinderTests(abc.FinderTests):
def test_empty_string_for_dir(self):
# The empty string from sys.path means to search in the cwd.
finder = _bootstrap.FileFinder('', (_bootstrap.SourceFileLoader,
_bootstrap._suffix_list(imp.PY_SOURCE), True))
_bootstrap._SOURCE_SUFFIXES, True))
with open('mod.py', 'w') as file:
file.write("# test file for importlib")
try:
@ -151,7 +151,7 @@ class FinderTests(abc.FinderTests):
def test_invalidate_caches(self):
# invalidate_caches() should reset the mtime.
finder = _bootstrap.FileFinder('', (_bootstrap.SourceFileLoader,
_bootstrap._suffix_list(imp.PY_SOURCE), True))
_bootstrap._SOURCE_SUFFIXES, True))
finder._path_mtime = 42
finder.invalidate_caches()
self.assertEqual(finder._path_mtime, -1)

2
Lib/importlib/test/source/test_path_hook.py
View file

@ -11,7 +11,7 @@ class PathHookTest(unittest.TestCase):
def path_hook(self):
return _bootstrap.FileFinder.path_hook((_bootstrap.SourceFileLoader,
_bootstrap._suffix_list(imp.PY_SOURCE), True))
_bootstrap._SOURCE_SUFFIXES, True))
def test_success(self):
with source_util.create_modules('dummy') as mapping: