Maybe this is for good reason, but here's why I want it.
Currently add_static_view doesn't support url generation if you use an absolute path. If you do config.add_static_view('static', '/home/foo/assets'), there's no way to use request.static_url(...) to generate a url to a file in that folder. This is a flaw in add_static_view, but it's solvable if we allow overriding.
However, if we could override assets, then it would work by making a dummy asset spec.
you try use request.static_url('mypkg:external_assets/whatever.*') ?
I think you're missing the point of my example.
add support for using an absolute path to override an asset
Would be great to have this land in Pyramid 1.6.