Import CSS to cache

README.vm.html

#set($css_cache = {})

#macro (importCSS $path)
    ## if the path does not yet exist as a key in the cache
    #if (!$css_cache.containsKey($path))
        ## load the path contents
        #set($css = $_.locateFile($path))

        ## if the file exists, cache the contents using the path as the key
        #if ($css)
            $css_cache.put($path, $css.text)
        #end
    #end
#end

## load a sample file into the cache
#importCSS("files/css/grassy.css")

## get the contents of a cached file
$css_cache.get("files/css/grassy.css")