diff -r 4f04368423ec -r b30aa02c85e7 mercurial/commands.py
--- a/mercurial/commands.py	Thu May 18 16:49:45 2006 -0700
+++ b/mercurial/commands.py	Sun May 21 22:14:11 2006 -0700
@@ -3291,6 +3291,9 @@
             continue
 
     for x in external:
+        uisetup = getattr(x, 'uisetup', None)
+        if uisetup:
+            uisetup(u)
         cmdtable = getattr(x, 'cmdtable', {})
         for t in cmdtable:
             if t in table: