fix site and sysconfig modules for VxWorks RTOS

Author: pxinwr

Doc/library/site.rst

@@ -178,8 +178,9 @@ Module contents
    :func:`getusersitepackages` hasn't been called yet.  Default value is
    :file:`~/.local/lib/python{X.Y}/site-packages` for UNIX and non-framework Mac
    OS X builds, :file:`~/Library/Python/{X.Y}/lib/python/site-packages` for Mac
-   framework builds, and :file:`{%APPDATA%}\\Python\\Python{XY}\\site-packages`
-   on Windows.  This directory is a site directory, which means that
+   framework builds, :file:`{sys.prefix}/lib/python{X.Y}/site-packages` for
+   VxWorks, and :file:`{%APPDATA%}\\Python\\Python{XY}\\site-packages` on
+   Windows. This directory is a site directory, which means that
    :file:`.pth` files in it will be processed.
 
 
@@ -188,7 +189,8 @@ Module contents
    Path to the base directory for the user site-packages.  Can be ``None`` if
    :func:`getuserbase` hasn't been called yet.  Default value is
    :file:`~/.local` for UNIX and Mac OS X non-framework builds,
-   :file:`~/Library/Python/{X.Y}` for Mac framework builds, and
+   :file:`~/Library/Python/{X.Y}` for Mac framework builds,
+   :file:`{sys.prefix}` for VxWorks builds, and
    :file:`{%APPDATA%}\\Python` for Windows.  This value is used by Distutils to
    compute the installation directories for scripts, data files, Python modules,
    etc. for the :ref:`user installation scheme <inst-alt-install-user>`.

Lib/site.py

@@ -266,6 +266,9 @@ def joinuser(*args):
         return joinuser("~", "Library", sys._framework,
                         "%d.%d" % sys.version_info[:2])
 
+    if sys.platform == "vxworks":
+        return sys.prefix
+
     return joinuser("~", ".local")
 
 

Lib/sysconfig.py

@@ -201,6 +201,9 @@ def joinuser(*args):
         return joinuser("~", "Library", sys._framework,
                         "%d.%d" % sys.version_info[:2])
 
+    if sys.platform == "vxworks":
+        return sys.prefix
+
     return joinuser("~", ".local")
 
 

Lib/test/test_site.py

@@ -303,8 +303,10 @@ def test_no_home_directory(self):
             del environ['APPDATA']
 
             user_base = site.getuserbase()
-            self.assertTrue(user_base.startswith('~' + os.sep),
-                            user_base)
+
+            if sys.platform != "vxworks":
+                self.assertTrue(user_base.startswith('~' + os.sep),
+                                user_base)
 
             user_site = site.getusersitepackages()
             self.assertTrue(user_site.startswith(user_base), user_site)

Misc/NEWS.d/next/Library/2020-08-11-17-44-07.bpo-31904.cb13ea.rst

@@ -0,0 +1 @@
+Fix site and sysconfig modules for VxWorks RTOS