extract DynamicCommand into separate method so it's easier to override and provide your own command class.

Author: apotonick

lib/thor.rb

@@ -350,7 +350,7 @@ def dispatch(meth, given_args, given_opts, config) #:nodoc:
         end
       else
         args, opts = given_args, nil
-        command = Thor::DynamicCommand.new(meth)
+        command = dynamic_command_class.new(meth)
       end
 
       opts = given_opts || opts || []
@@ -376,6 +376,10 @@ def baseclass #:nodoc:
       Thor
     end
 
+    def dynamic_command_class #:nodoc:
+      Thor::DynamicCommand
+    end
+
     def create_command(meth) #:nodoc:
       if @usage && @desc
         base_class = @hide ? Thor::HiddenCommand : Thor::Command