Depending on how the CSS sourceMaps were written, we may have issues with filenames. grunt-contrib-uglify let's you specify a sourceMapIn method to help deal with these issues.
I have added a pull request for this. Is this what you meant? It's exactly what I needed but it could be I made some wrong assumptions about your request.
Depending on how the CSS sourceMaps were written, we may have issues with filenames. grunt-contrib-uglify let's you specify a sourceMapIn method to help deal with these issues.
This plugin should add that ability too.