grails - subdomain based projects and links

Question

I am trying to develop a grails application that has "root" content (www.mydomain.com/about for example) but will also support "projects" based upon the subdomain of the request; for example myproject.mydomain.com > www.mydomain.com/myproject. As a first pass, i have the URL configuration below:

"/$controller/$action?/$id?" {
 ...
}

"/$project/$controller/$action?/$id?" {
    constraints {
    }
}

The main drawback so far is that the $project variable must be injected manually into every link (tedious and not DRY):

<g:link controller="foo" action="bar" params="${[project: params.project]}">link</g:link>

Is there a way to automatically inject the $project parameter into all links if it is present, or is there a better way to approach this problem?

Answer 1

Basically you can create a grails plugin that will inject into the controller a new project param with a value based on a custom TagLib <g:project bean="myproject"/> (for instance)

It will force you to define this tagLib on each gsp page of your project but it is still DRYer than each link.

Hope it helps,

Fabien.