Fix requires at least 0 argument error in Thor

rails/thor#234

cmd/bin/spree

@@ -1,5 +1,2 @@
 #!/usr/bin/env ruby
-
-require 'spree_cmd'
-
-SpreeCmd::Command.start
+require 'spree_cmd'

cmd/bin/spree_cmd

@@ -1,6 +1,3 @@
 #!/usr/bin/env ruby
 
-require 'spree_cmd'
-
-SpreeCmd::Command.start
-
+require 'spree_cmd'

cmd/lib/spree_cmd.rb

@@ -1,29 +1,19 @@
 require 'thor'
 require 'thor/group'
 
-require 'spree_cmd/installer'
-require 'spree_cmd/extension'
-require 'spree_cmd/version'
-
 module SpreeCmd
-  class Command < Thor
-
-    desc 'install', 'adds spree to an existing rails app'
-    method_option :app_path, :type => :string, :desc => 'path to rails application'
-    def install(app_path = '.')
-      invoke Installer
-    end
+  class Command
 
-    desc 'extension', 'builds a spree extension'
-    method_option :app_path, :type => :string, :desc => 'path to new extension'
-    def extension(app_path)
-      invoke Extension
+    if ARGV.first == 'version'
+      puts Gem.loaded_specs['spree_cmd'].version
+    elsif ARGV.first == 'extension'
+      ARGV.shift
+      require 'spree_cmd/extension'
+      SpreeCmd::Extension.start
+    else
+      ARGV.shift
+      require 'spree_cmd/installer'
+      SpreeCmd::Installer.start
     end
-
-		desc 'version', 'display spree_cmd version'
-    def version
-      invoke Version
-    end
-
   end
-end
+end