BUG: PyPy does not use a special filename suffix for the stable API

Author: dnicolodi

mesonpy/__init__.py

@@ -382,18 +382,21 @@ def entrypoints_txt(self) -> bytes:
     @cached_property
     def _stable_abi(self) -> Optional[str]:
         if self._limited_api:
-            # Verify stabe ABI compatibility: examine files installed
-            # in {platlib} that look like extension modules, and raise
-            # an exception if any of them has a Python version
-            # specific extension filename suffix ABI tag.
-            for path, _ in self._manifest['platlib']:
-                match = _EXTENSION_SUFFIX_REGEX.match(path.name)
-                if match:
-                    abi = match.group('abi')
-                    if abi is not None and abi != 'abi3':
-                        raise BuildError(
-                            f'The package declares compatibility with Python limited API but extension '
-                            f'module {os.fspath(path)!r} is tagged for a specific Python version.')
+            # PyPy does not use a special extension module filename
+            # suffix for modules targeting the stable API.
+            if '__pypy__' not in sys.builtin_module_names:
+                # Verify stable ABI compatibility: examine files installed
+                # in {platlib} that look like extension modules, and raise
+                # an exception if any of them has a Python version
+                # specific extension filename suffix ABI tag.
+                for path, _ in self._manifest['platlib']:
+                    match = _EXTENSION_SUFFIX_REGEX.match(path.name)
+                    if match:
+                        abi = match.group('abi')
+                        if abi is not None and abi != 'abi3':
+                            raise BuildError(
+                                f'The package declares compatibility with Python limited API but extension '
+                                f'module {os.fspath(path)!r} is tagged for a specific Python version.')
             return 'abi3'
         return None
 

tests/test_tags.py

@@ -94,8 +94,8 @@ def test_tag_stable_abi():
     assert str(builder.tag) == f'{INTERPRETER}-abi3-{PLATFORM}'
 
 
-@pytest.mark.skipif(sys.version_info < (3, 8) and sys.platform == 'win32',
-                    reason='Extension modules filename suffix without ABI tags')
+@pytest.mark.xfail(sys.version_info < (3, 8) and sys.platform == 'win32', reason='Extension modules suffix without ABI tags')
+@pytest.mark.xfail('__pypy__' in sys.builtin_module_names, reason='PyPy does not use special modules suffix for stable ABI')
 def test_tag_mixed_abi():
     builder = wheel_builder_test_factory({
         'platlib': [f'extension{ABI3SUFFIX}', f'another{SUFFIX}'],

tests/test_wheel.py

@@ -299,6 +299,7 @@ def test_limited_api(wheel_limited_api):
 
 # Requires Meson 1.3.0, see https://github.com/mesonbuild/meson/pull/11745.
 @pytest.mark.skipif(MESON_VERSION < (1, 2, 99), reason='Meson version too old')
+@pytest.mark.xfail('__pypy__' in sys.builtin_module_names, reason='PyPy does not use special modules suffix for stable ABI')
 def test_limited_api_bad(package_limited_api, tmp_path):
     with pytest.raises(mesonpy.BuildError, match='The package declares compatibility with Python limited API but '):
         with mesonpy._project({'setup-args': ['-Dextra=true']}) as project: