exe/caravan in caravan-0.6.0 vs exe/caravan in caravan-0.6.1

@@ -5,11 +5,11 @@
 require "optparse"
 require "caravan"
 
 options = {}
 option_parser = OptionParser.new do |opts|
-  opts.banner = "Caravan #{Caravan::VERSION}\nCopyright (c) David Zhang 2017\n"
+  opts.banner = "Caravan #{Caravan::VERSION}\nCopyright (c) David Zhang 2018\n"
   opts.separator ""
 
   opts.on("-s SOURCE_PATH", "--source SOURCE_PATH", "Source path") do |value|
     options[:src] = value
   end
@@ -50,12 +50,16 @@
     puts Caravan::VERSION
     exit
   end
 end
 
-option_parser.parse!(ARGV)
+if ARGV.length == 0
+  merged_conf = Caravan::Config.merge({}, Caravan.process_conf("."))
+else
+  option_parser.parse!(ARGV)
+  merged_conf = Caravan::Config.merge(options, Caravan.process_conf(options[:src]))
+end
 
-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")
   Caravan.start(merged_conf)
 else
   Caravan::Message.error("No src, dst, deploy_mode specified. Cannot deploy.")
 end