Homebrew/homebrew — pull request #28328 by mikemcquaid (2014-04-11 15:05:39+00:00)
Title: readall: read formulae that aren't tapped.

This will allow the reading and checking of formulae that mirror Homebrew core formulae (e.g. `git` in a tap) and, with the previous exit code changes, is a reasonable check for "are all the formulae in taps updated to the latest core DSL".

Seems to have no impact on performance.

Ping @jacknagel