Using Less in the plone.app.theming editor only works at root

[ebrehault]

If we copy and modify a Diazo theme throught-the-web using the Theming editor, and if this theme contains some .less files, we can declare them in portal_less with an id like:
++theme++my-ttw-theme/style.less
and it works fine.
But if the .less file is not at the root, like:
++theme++my-ttw-theme/less/style.less
Then it does not compile.

I haven't find a fix for now, but I know this is due to https://github.com/plone/Products.ResourceRegistries/blob/master/Products/ResourceRegistries/tools/BaseRegistry.py#L672 which produces an Unauthorized error.

[seppeljordan]

can you give the full backtrace?

[ebrehault]

There is no traceback. It just does not compile the less resource.

But if you inspect with pdb:
https://github.com/collective/collective.lesscss/blob/master/src/collective/lesscss/browser/compiledcss.py#L39
inline_code = portal_less.getInlineResource(item_id, self.context)

brings you to:
Products.ResourceRegistries-2.2.9-py2.7.egg/Products/ResourceRegistries/tools/BaseRegistry.py(1060)getInlineResource()
output = self.getResourceContent(item, context)

which brings you to;
Products.ResourceRegistries-2.2.9-py2.7.egg/Products/ResourceRegistries/tools/BaseRegistry.py(667)getResourceContent()
where there is a try / except block, where
obj = context.restrictedTraverse(id)
raises an Unauthorized error