Add defaults / cli_flags for yesno() input

letsencrypt/cli.py

@@ -156,7 +156,7 @@ def _determine_account(args, config):
                        "server at {1}".format(
                            regr.terms_of_service, config.server))
                 return zope.component.getUtility(interfaces.IDisplay).yesno(
-                    msg, "Agree", "Cancel")
+                    msg, "Agree", "Cancel", cli_flag="--agree-tos")
 
             try:
                 acc, acme = client.register(
@@ -315,7 +315,8 @@ def _handle_subset_cert_request(config, domains, cert):
              ", ".join(domains),
              br=os.linesep)
     if config.expand or config.renew_by_default or zope.component.getUtility(
-            interfaces.IDisplay).yesno(question, "Expand", "Cancel"):
+            interfaces.IDisplay).yesno(question, "Expand", "Cancel",
+                                       default=True):
         return "renew", cert
     else:
         reporter_util = zope.component.getUtility(interfaces.IReporter)

letsencrypt/display/ops.py

@@ -197,7 +197,8 @@ def choose_names(installer):
             "specify ServerNames in your config files in order to allow for "
             "accurate installation of your certificate.{0}"
             "If you do use the default vhost, you may specify the name "
-            "manually. Would you like to continue?{0}".format(os.linesep))
+            "manually. Would you like to continue?{0}".format(os.linesep),
+            default=False, cli_flag="--domains")
 
         if manual:
             return _choose_names_manually()

letsencrypt/plugins/manual.py

@@ -165,7 +165,8 @@ s.serve_forever()" """
         else:
             if not self.conf("public-ip-logging-ok"):
                 if not zope.component.getUtility(interfaces.IDisplay).yesno(
-                        self.IP_DISCLAIMER, "Yes", "No"):
+                        self.IP_DISCLAIMER, "Yes", "No",
+                        cli_flag="--manual-public-ip-logging-ok"):
                     raise errors.PluginError("Must agree to IP logging to proceed")
 
             self._notify_and_wait(self.MESSAGE_TEMPLATE.format(