add optional support for xdg_config|cache_dir

IPython/paths.py

@@ -54,8 +54,7 b' def get_ipython_dir() -> str:'
                     warn(('{0} is deprecated. Move link to {1} to '
                         'get rid of this message').format(cu(xdg_ipdir), cu(ipdir)))
                 else:
-                    warn('Moving {0} to {1}'.format(cu(xdg_ipdir), cu(ipdir)))
-                    shutil.move(xdg_ipdir, ipdir)
+                    ipdir = xdg_ipdir
 
     ipdir = os.path.normpath(os.path.expanduser(ipdir))
 

IPython/utils/path.py

@@ -223,7 +223,7 b' def get_xdg_dir():'
 
     env = os.environ
 
-    if os.name == 'posix' and sys.platform != 'darwin':
+    if os.name == "posix":
         # Linux, Unix, AIX, etc.
         # use ~/.config if empty OR not set
         xdg = env.get("XDG_CONFIG_HOME", None) or os.path.join(get_home_dir(), '.config')
@@ -242,7 +242,7 b' def get_xdg_cache_dir():'
 
     env = os.environ
 
-    if os.name == 'posix' and sys.platform != 'darwin':
+    if os.name == "posix":
         # Linux, Unix, AIX, etc.
         # use ~/.cache if empty OR not set
         xdg = env.get("XDG_CACHE_HOME", None) or os.path.join(get_home_dir(), '.cache')