how to override the store/checkouts.js asset ? ( error Spree is not defined ...)

[Erwin]

I am stuck with something that should be easy as per the documentation:

To replace an entire JavaScript file as provided by Spree you simply need to create a file with the same name and save it to the corresponding path within your application’s or extension’s app/assets/javascripts directory

so, I initially copied the Spree frontend/app/javascript/store.js.coffee script into my own app, 

into  my  app/assets/javascript/store/checkout.js.coffee

and added  in my  app/assets/javascript/store/all.js

    //= require store/checkout

but when I run it in dev mode , I get a js error :

Timestamp: 25/02/13 10:20:41

Error: ReferenceError: Spree is not defined

Source File: http://localhost:3000/assets/store/checkout.js?body=1

Line: 9

here is my all.js file

//= require jquery
//= require jquery_ujs
//= require store/spree_core
//= require store/spree_auth
//= require store/spree_promo
// require_tree .
//= require jquery.fancybox
//= require jquery.mousewheel-3.0.6.pack
//= require jcarousellite_1.3.1
//= require store/checkout
//= require store/workshop

//= require store/spree_multi_lingual

   

[Laurens Nienhaus]

I guess

// require_tree .

should read

//= require_tree .

or is that the cause of your problem?

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[Erwin]

yeah,  I thanks , but I already modified it and  it seems I don't need to require directly the script...

so it's overridden .. my own checkout file is taken in account but in this case there is an error

[15:32:48.583] ReferenceError: Spree is not defined @ http://localhost:3000/assets/store/checkout.js?body=1:9

>  faulty line :  Spree.checkout = {}

so I'm back to my issue , how to override 'correctly' the Spree checkout.js

( In Spree code there is a  spree.js ..  should I require it ... ?   no info on it in the doc...)

//= require jquery

//= require jquery_ujs

//= require jquery.fancybox

//= require jquery.mousewheel-3.0.6.pack

//= require jcarousellite_1.3.1

//= require store/spree_core

//= require store/spree_auth

//= require store/spree_promo

//= require_tree .

//= require jquery

//= require jquery_ujs

//= require jquery.fancybox

//= require jquery.mousewheel-3.0.6.pack

//= require jcarousellite_1.3.1

//= require store/spree_core

//= require store/spree_auth

//= require store/spree_promo

//= require_tree .

//= require store/workshop