MVC 4 Portable Areas CSS/JS minification - asp.net-mvc

Question

I used MVC 3 + Contrib Project PortableAreas to split my web to multiple projects.
Now I moved to MVC 4 and want to use new feature minification for my css and JS.
But when I do:
<link href="#Url.Content("~/DSB/Styles/CSS")" rel="stylesheet" type="text/css" />
<script src="#Url.Content("~/Scripts/common/js")" type="text/javascript">
instead of:
<link href="#Url.Content("~/DSB/Styles/Site.css")" rel="stylesheet" type="text/css" />
<link href="#Url.Content("~/Content/themes/smoothness/jquery-ui-1.8.12.custom.css")" rel="stylesheet" type="text/css" />
<script src="#Url.Content("~/Scripts/common/jquery-1.4.4.min.js")" type="text/javascript" />
<script src="#Url.Content("~/Scripts/common/jquery-ui-1.8.11.custom.min.js")" type="text/javascript"></script>
it does not work.
How to use bundling/minification in Portable areas?
thanks

Answer 1

The problem here is that the bundling and minification does not foresee handling anything else than actual files. I have 2 solutions here that work.
Extract the files into temp files - requires write privileges for a folder within the app. Here is the code to handle that. It uses a directory called "Static" as the temporary target path. You can use it like this:
bundles.Add(new Rebundler(assemblyWithPortableArea, "~/VirtualPathUsedForResource")
.Include("Fully.Qualified.Embeded.Resource.Name", "other...")
.Rebundle());
Using it in a template is exaxctly as if you would use it in a non portable app, so #Scripts.Render() or #Styles.Render()
The other solution involves creating a bunch of classes that will allow you to use embeded resources. Here is the base class, and here are the script and style bundles. Here's the usage:
bundles.Add(new EmbededStyleBundle(assemblyWithPortableArea, "~/VirtualPathUsedForResource")
.Include("~/AreaName/Content/themes/custom/jquery-ui.css"));
With this approach, you need to use this class to render the resources. So instead of using the #Scripts.Render() or #Styles.Render() the template code looks like this:
#Assets.RenderStyles("virtual path here")
#Assets.RenderScripts("virtual path here")
Note that this code is far from clean. It has been mostly reverse engineered and may skip a few paths, but it seems to work so far.