diff -r 7e6138cb8d38 -r 4528858e7202 mercurial/commands.py
--- a/mercurial/commands.py	Mon Sep 24 19:00:11 2007 -0300
+++ b/mercurial/commands.py	Mon Sep 24 19:00:11 2007 -0300
@@ -1489,6 +1489,10 @@
     name for non-default branches.
     """
 
+    if not repo and not source:
+        raise util.Abort(_("There is no Mercurial repository here "
+                           "(.hg not found)"))
+
     hexfunc = ui.debugflag and hex or short
     default = not (num or id or branch or tags)
     output = []
@@ -3155,7 +3159,7 @@
 
 norepo = ("clone init version help debugancestor debugcomplete debugdata"
           " debugindex debugindexdot debugdate debuginstall")
-optionalrepo = ("paths serve showconfig")
+optionalrepo = ("identify paths serve showconfig")
 
 def dispatch(args):
     try: