If you're a ruby developer I strongly encourage you to check out the source code and parsing in general. This is heavily using parslet [1] to build a css parser

If you're a ruby developer I strongly encourage you to check out the source code and parsing in general. This is heavily using parslet [1] to build a css parser [2]. I'm sure there are edge cases I have missed, but still the LOC for this codebase is relatively small and fairly readable. Stay away from the RedundancyAnalyzer though. There be dragons. [1] http://kschiess.github.io/parslet/ http://kschiess.github.io/parslet/ [2] https://github.com/zmoazeni/csscss/tree/ae2f22f4416bca35f903970c15aa1685a8d237cd/lib/csscss/parser https://github.com/zmoazeni/csscss/tree/ae2f22f4416bca35f903...