fixup sys._base_executable

Author: rickeylev

python/private/site_init_template.py

@@ -199,6 +199,23 @@ def _maybe_add_path(path):
 
     return coverage_setup
 
+# The pyvenv.cfg created for py_binary leaves the `home` key unset. A
+# side-effect of this is `sys._base_executable` points to the venv executable,
+# not the actual executable. This mostly doesn't matter, but does affect
+# using the venv module to create venvs (they point to the venv executable, not
+# the actual executable).
+def _fixup_sys_base_executable():
+    # Must have been set correctly?
+    if sys.executable != sys._base_executable:
+        return
+    # Not in a venv, so don't touch anything.
+    if sys.prefix == sys.base_prefix:
+        return
+    exe = os.path.realpath(sys.executable)
+    _print_verbose("setting sys._base_executable:", exe)
+    sys._base_executable = exe
+
+_fixup_sys_base_executable()
 
 COVERAGE_SETUP = _setup_sys_path()
 _print_verbose("DONE")