Revert "pythonGH-126789: fix some sysconfig data on late site initial…

…izations"

This reverts commit acbd5c9.

Signed-off-by: Filipe Laíns <[email protected]>

Lib/sysconfig/__init__.py

@@ -173,7 +173,9 @@ def joinuser(*args):
 _PY_VERSION = sys.version.split()[0]
 _PY_VERSION_SHORT = f'{sys.version_info[0]}.{sys.version_info[1]}'
 _PY_VERSION_SHORT_NO_DOT = f'{sys.version_info[0]}{sys.version_info[1]}'
+_PREFIX = os.path.normpath(sys.prefix)
 _BASE_PREFIX = os.path.normpath(sys.base_prefix)
+_EXEC_PREFIX = os.path.normpath(sys.exec_prefix)
 _BASE_EXEC_PREFIX = os.path.normpath(sys.base_exec_prefix)
 # Mutex guarding initialization of _CONFIG_VARS.
 _CONFIG_VARS_LOCK = threading.RLock()
@@ -465,10 +467,8 @@ def _init_config_vars():
     # Normalized versions of prefix and exec_prefix are handy to have;
     # in fact, these are the standard versions used most places in the
     # Distutils.
-    _PREFIX = os.path.normpath(sys.prefix)
-    _EXEC_PREFIX = os.path.normpath(sys.exec_prefix)
-    _CONFIG_VARS['prefix'] = _PREFIX  # FIXME: This gets overwriten by _init_posix.
-    _CONFIG_VARS['exec_prefix'] = _EXEC_PREFIX  # FIXME: This gets overwriten by _init_posix.
+    _CONFIG_VARS['prefix'] = _PREFIX
+    _CONFIG_VARS['exec_prefix'] = _EXEC_PREFIX
     _CONFIG_VARS['py_version'] = _PY_VERSION
     _CONFIG_VARS['py_version_short'] = _PY_VERSION_SHORT
     _CONFIG_VARS['py_version_nodot'] = _PY_VERSION_SHORT_NO_DOT
@@ -541,7 +541,6 @@ def get_config_vars(*args):
     With arguments, return a list of values that result from looking up
     each argument in the configuration variable dictionary.
     """
-    global _CONFIG_VARS_INITIALIZED
 
     # Avoid claiming the lock once initialization is complete.
     if not _CONFIG_VARS_INITIALIZED:
@@ -552,15 +551,6 @@ def get_config_vars(*args):
             # don't re-enter init_config_vars().
             if _CONFIG_VARS is None:
                 _init_config_vars()
-    else:
-        # If the site module initialization happened after _CONFIG_VARS was
-        # initialized, a virtual environment might have been activated, resulting in
-        # variables like sys.prefix changing their value, so we need to re-init the
-        # config vars (see GH-126789).
-        if _CONFIG_VARS['base'] != os.path.normpath(sys.prefix):
-            with _CONFIG_VARS_LOCK:
-                _CONFIG_VARS_INITIALIZED = False
-                _init_config_vars()
 
     if args:
         vals = []

Lib/test/test_sysconfig.py

@@ -110,6 +110,7 @@ def venv(self, **venv_create_args):
             **venv_create_args,
         )
 
+
     def test_get_path_names(self):
         self.assertEqual(get_path_names(), sysconfig._SCHEME_KEYS)
 
@@ -591,71 +592,6 @@ def test_osx_ext_suffix(self):
         suffix = sysconfig.get_config_var('EXT_SUFFIX')
         self.assertTrue(suffix.endswith('-darwin.so'), suffix)
 
-    @requires_subprocess()
-    def test_config_vars_depend_on_site_initialization(self):
-        script = textwrap.dedent("""
-            import sysconfig
-
-            config_vars = sysconfig.get_config_vars()
-
-            import json
-            print(json.dumps(config_vars, indent=2))
-        """)
-
-        with self.venv() as venv:
-            site_config_vars = json.loads(venv.run('-c', script).stdout)
-            no_site_config_vars = json.loads(venv.run('-S', '-c', script).stdout)
-
-        self.assertNotEqual(site_config_vars, no_site_config_vars)
-        # With the site initialization, the virtual environment should be enabled.
-        self.assertEqual(site_config_vars['base'], venv.prefix)
-        self.assertEqual(site_config_vars['platbase'], venv.prefix)
-        #self.assertEqual(site_config_vars['prefix'], venv.prefix)  # # FIXME: prefix gets overwriten by _init_posix
-        # Without the site initialization, the virtual environment should be disabled.
-        self.assertEqual(no_site_config_vars['base'], site_config_vars['installed_base'])
-        self.assertEqual(no_site_config_vars['platbase'], site_config_vars['installed_platbase'])
-
-    @requires_subprocess()
-    def test_config_vars_recalculation_after_site_initialization(self):
-        script = textwrap.dedent("""
-            import sysconfig
-
-            before = sysconfig.get_config_vars()
-
-            import site
-            site.main()
-
-            after = sysconfig.get_config_vars()
-
-            import json
-            print(json.dumps({'before': before, 'after': after}, indent=2))
-        """)
-
-        with self.venv() as venv:
-            config_vars = json.loads(venv.run('-S', '-c', script).stdout)
-
-        self.assertNotEqual(config_vars['before'], config_vars['after'])
-        self.assertEqual(config_vars['after']['base'], venv.prefix)
-        #self.assertEqual(config_vars['after']['prefix'], venv.prefix)  # FIXME: prefix gets overwriten by _init_posix
-        #self.assertEqual(config_vars['after']['exec_prefix'], venv.prefix)  # FIXME: exec_prefix gets overwriten by _init_posix
-
-    @requires_subprocess()
-    def test_paths_depend_on_site_initialization(self):
-        script = textwrap.dedent("""
-            import sysconfig
-
-            paths = sysconfig.get_paths()
-
-            import json
-            print(json.dumps(paths, indent=2))
-        """)
-
-        with self.venv() as venv:
-            site_paths = json.loads(venv.run('-c', script).stdout)
-            no_site_paths = json.loads(venv.run('-S', '-c', script).stdout)
-
-        self.assertNotEqual(site_paths, no_site_paths)
-
     @requires_subprocess()
     def test_makefile_overwrites_config_vars(self):
         script = textwrap.dedent("""
@@ -689,7 +625,6 @@ def test_makefile_overwrites_config_vars(self):
         self.assertNotEqual(data['prefix'], data['base_prefix'])
         self.assertNotEqual(data['exec_prefix'], data['base_exec_prefix'])
 
-
 class MakefileTests(unittest.TestCase):
 
     @unittest.skipIf(sys.platform.startswith('win'),