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[3.12] gh-123085: Fix issue in inferred caller when resources package has no source (GH-123102) (#124021)

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gh-123085: Fix issue in inferred caller when resources package has no source.

From importlib_resources 6.4.3 (python/importlib_resourcesGH-314).
(cherry picked from commit a53812df12)
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Jason R. Coombs 2025-01-05 16:53:55 -05:00 • committed by GitHub
parent 09f7d88cad
commit d712ece43f
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3 changed files with 50 additions and 4 deletions
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46
Lib/test/test_importlib/resources/test_files.py
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@ -1,4 +1,8 @@
import typing
import os
import pathlib
import py_compile
import shutil
import textwrap
import unittest
import warnings
@ -10,8 +14,7 @@ from importlib.resources.abc import Traversable
from . import data01
from . import util
from . import _path
from test.support import os_helper
from test.support import import_helper
from test.support import os_helper, import_helper
@contextlib.contextmanager
@ -144,6 +147,45 @@ class ImplicitContextFilesTests(SiteDir, unittest.TestCase):
self.fixtures.enter_context(import_helper.DirsOnSysPath(zip_file))
assert importlib.import_module('somepkg.submod').val == 'resources are the best'
def _compile_importlib(self):
"""
Make a compiled-only copy of the importlib resources package.
"""
bin_site = self.fixtures.enter_context(os_helper.temp_dir())
c_resources = pathlib.Path(bin_site, 'c_resources')
sources = pathlib.Path(resources.__file__).parent
shutil.copytree(sources, c_resources, ignore=lambda *_: ['__pycache__'])
for dirpath, _, filenames in os.walk(c_resources):
for filename in filenames:
source_path = pathlib.Path(dirpath) / filename
cfile = source_path.with_suffix('.pyc')
py_compile.compile(source_path, cfile)
pathlib.Path.unlink(source_path)
self.fixtures.enter_context(import_helper.DirsOnSysPath(bin_site))
def test_implicit_files_with_compiled_importlib(self):
"""
Caller detection works for compiled-only resources module.
python/cpython#123085
"""
set_val = textwrap.dedent(
f"""
import {resources.__name__} as res
val = res.files().joinpath('res.txt').read_text(encoding='utf-8')
"""
)
spec = {
'frozenpkg': {
'__init__.py': set_val.replace(resources.__name__, 'c_resources'),
'res.txt': 'resources are the best',
},
}
_path.build(spec, self.site_dir)
self._compile_importlib()
assert importlib.import_module('frozenpkg').val == 'resources are the best'
if __name__ == '__main__':
unittest.main()