diff -r 9ab7eba99fe5 -r 98cbfbbe33bb contrib/phabricator.py
--- a/contrib/phabricator.py	Thu Mar 08 21:17:26 2018 -0800
+++ b/contrib/phabricator.py	Fri Mar 09 16:09:27 2018 +0100
@@ -99,13 +99,17 @@
     process('', params)
     return util.urlreq.urlencode(flatparams)
 
+printed_token_warning = False
+
 def readlegacytoken(repo):
     """Transitional support for old phabricator tokens.
 
     Remove before the 4.6 release.
     """
+    global printed_token_warning
     token = repo.ui.config('phabricator', 'token')
-    if token:
+    if token and not printed_token_warning:
+        printed_token_warning = True
         repo.ui.warn(_('phabricator.token is deprecated - please '
                        'migrate to the phabricator.auth section.\n'))
     return token