get_theme_root_uri doesn't get correct theme root for themes in folders registered by register_theme_directory

[davidosomething]

get_theme_root_uri doesn't get correct theme root for themes in folders registered by register_theme_directory

Doing this in wp-config.php:

define('DKO_ABSPATH', __DIR__ . '/');
// just sets DKO_ABSPATH to the path of the wp-config.php file, which happens to be my web root

Doing this in an mu-plugin:

register_theme_directory( DKO_ABSPATH . 'themes/' );
// add the webroot/themes folder as a  theme directory, trailing slash required (ideally trailingslashit in the register_theme_directory function)

Yields this for get_stylesheet_uri():

http://www.davidosomething.dev/wp/Users/dotrakoun/Sites/openshift/main/php/themes/2013-davidosomething/style.css?ver=3.5.1

i.e. the full path is returned instead of the uri.

Think the case matching in theme.php lines 477-490 (get_theme_root_uri) doesn't cover paths registered using register_theme_directory but outside of ABSPATH, site_url, and content_url

[nacin]

There's a comment in get_theme_root_uri() — "Absolute path. Make an educated guess. YMMV -- but note the filter below." (As in Your Mileage May Vary.) This isn't a bug, it's a known thing. There's no way for us to know the URL of such a theme directory, when it is outside all other known directories.

One thing we can do — something I've not yet bothered to do, but have thought about it — is add a second, optional URL argument to register_theme_directory().

[SergeyBiryukov]

Related: #17597

[chriscct7]

Per comment:1 closing as wontfix