- start working on date support for Event#sprintf

lib/logstash/event.rb

@@ -134,7 +134,14 @@ class LogStash::Event
   public
   def sprintf(format)
     return format.gsub(/%\{[^}]+\}/) do |tok|
+      # Take the inside of the %{ ... }
       key = tok[2 ... -1]
+
+      if key[0,1] == "+"
+        # Use a time format.
+        # TODO(sissel): http://code.google.com/p/logstash/issues/detail?id=38
+      else 
+        # Use an event field.
         value = self[key]
         if value.nil?
           tok # leave the %{foo} if this field does not exist in this event.
@@ -144,6 +151,7 @@ class LogStash::Event
           value # otherwise return the value
         end
       end
+    end
   end # def sprintf
 
   public