rspec/rspec-core — pull request #1496 by myronmarston (2014-04-21 18:16:45+00:00)
Title: WIP: define derived metadata.

This fixes #969 and supercedes #1089.

Not ready for merge yet (or even at a point where I'd ask it to be reviewed)...I'm pushing this so I can make an rspec-rails PR that depends on this.