Best CSS aggregation with "aliases"

API page: http://api.drupal.org/api/drupal/includes%21common.inc/function/drupal_b...

Hello,

A suggestion :
The CSS filename or CSS path must depends on base_path or base_url.
(In function drupal_build_css_cache, includes/common.inc, line 3535 :
$filename = 'css_' . drupal_hash_base64($data) . '.css';)

Indeed, in "drupal_build_css_cache", we have "_drupal_build_css_path" ... This function prefixes with base path and removes '../' segments where possible. the generated CSS file does references to a "static base path" even if aliases sites (@sites.php) is different.
Example :
$sites = array(
'example.com.mypublicUri' => 'example.com',
'example.com.myprivateUri' => 'example.com',
);
The "Http://example.com/mypublicUri" CSS files references "/myprivateUri" (like background: url("/myprivateUri/images/green.jpg") ).

Other example : Module "Boost" uses aliases subdirectories to save cache files (css, js, html etc...)

Thanks for your time and consideration.

Best regards,
Gg