exe/caravan in caravan-0.5.1 vs exe/caravan in caravan-0.5.2

@@ -28,10 +28,15 @@
     else
       options[:ignore] = [value]
     end
   end
 
+  options[:once] = false
+  opts.on("-o", "--once", "Deploy for once") do
+    options[:once] = true
+  end
+
   options[:debug] = false
   opts.on("-b", "--debug", "Debug mode") do
     options[:debug] = true
   end
 
@@ -45,10 +50,10 @@
   Caravan.dump_default_conf
 end
 
 option_parser.parse!(ARGV)
 merged_conf = Caravan::Config.merge(options, Caravan.process_conf(options[:src]))
-if merged_conf.key?('src') && merged_conf.key?('dst') && merged_conf.key?('deploy_mode')
+if merged_conf.key?("src") && merged_conf.key?("dst") && merged_conf.key?("deploy_mode")
   Caravan.start(merged_conf)
 else
-  Caravan::Message.error('No src, dst, deploy_mode specified. Cannot deploy.')
+  Caravan::Message.error("No src, dst, deploy_mode specified. Cannot deploy.")
 end