bpo-37369: Fix initialization of sys members when launched via an app container (GH-14428)

sys._base_executable is now always defined on all platforms, and can be overridden through configuration.
Also adds test.support.PythonSymlink to encapsulate platform-specific logic for symlinking sys.executable

1 files changed, 4 insertions, 3 deletions

diff --git a/Lib/test/test_httpservers.py b/Lib/test/test_httpservers.py
index 8357ee9..87d4924 100644
--- a/Lib/test/test_httpservers.py
+++ b/Lib/test/test_httpservers.py
@@ -610,9 +610,10 @@ class CGIHTTPServerTestCase(BaseTestCase):
 
         # The shebang line should be pure ASCII: use symlink if possible.
         # See issue #7668.
+        self._pythonexe_symlink = None
         if support.can_symlink():
             self.pythonexe = os.path.join(self.parent_dir, 'python')
-            os.symlink(sys.executable, self.pythonexe)
+            self._pythonexe_symlink = support.PythonSymlink(self.pythonexe).__enter__()
         else:
             self.pythonexe = sys.executable
 
@@ -655,8 +656,8 @@ class CGIHTTPServerTestCase(BaseTestCase):
     def tearDown(self):
         try:
             os.chdir(self.cwd)
-            if self.pythonexe != sys.executable:
-                os.remove(self.pythonexe)
+            if self._pythonexe_symlink:
+                self._pythonexe_symlink.__exit__(None, None, None)
             if self.nocgi_path:
                 os.remove(self.nocgi_path)
             if self.file1_path: