Implement `-t' CLI option switch to specify target

lib/producer/core/cli.rb

@@ -34,12 +34,14 @@ module Producer
       end
 
       def parse_arguments!
-        @arguments = arguments.inject([]) do |m, e|
+        @arguments = arguments.each_with_index.inject([]) do |m, (e, i)|
           case e
           when '-v'
             env.verbose = true
           when '-n'
             env.dry_run = true
+          when '-t'
+            env.target = arguments.delete_at i + 1
           else
             m << e
           end

lib/producer/core/recipe/dsl.rb

@@ -25,7 +25,7 @@ module Producer
         end
 
         def target(hostname)
-          env.target = hostname
+          env.target ||= hostname
         end
 
         def task(name, *args, &block)