Strip away the relative path

[jcoyne]

Fixes #478

Previously having this css:

src: url(./fontawesome/fa-brands-400.eot);

would be transformed into:

src: url(/./fontawesome/fa-brands-400.eot);

This strips off the unnecessary ./ so it will be:

src: url(/fontawesome/fa-brands-400.eot);

[jcoyne]

@chuchiperriman does this solve your issue? It wasn't entirely clear to me the situation you had given the description for #478

[dhh]

I think the problem was also with fully relative paths, like: src: url(fontawesome/fa-brands-400.eot). What actually is the right thing for us to do then? I think that too has to be converted to /fontawesome/fa-brands-400.eot.

[jcoyne]

@dhh I have the same question. I added a test for the current behavior for that case here: https:/rails/sprockets-rails/pull/482/files#diff-8226e061e1adf779cb31d000395d5c814bc94696f12b25fa4ac7cb8acb9ee555R58-R63 I don't know if that's the right behavior though.

[dhh]

Other option is to truly let it be relative. But don't know if we have all the info for the sprockets processor to do that?

[dhh]

Anyway, this at least fixes the direct breakage.