queue login requests, so it only happens once

diff --git a/client.coffee b/client.coffee
index 13641e9..02d28c1 100755 (executable)
--- a/client.coffee
+++ b/client.coffee
@@ -197,7 +197,15 @@ get_token = (callback) ->
                else
                        callback null, token
 
-login = (callback) ->
+login_callbacks = []
+login = (real_callback) ->
+       login_callbacks.push real_callback
+       return if login_callbacks.length > 1
+
+       callback = (err, token) ->
+               while login_callbacks.length > 0
+                       login_callbacks.shift()(err, token)
+
        async.waterfall [
                (callback) => async.series [
                        (callback) => @ask prompt: 'username: ', callback