Homebrew/homebrew-python — pull request #137 by tdsmith (2014-06-27 06:38:28+00:00)
Title: Warn on install if gfortran formula is installed

Take agatti's good advice in #133 and attempt to warn away users with the old gfortran formula installed.

Poking in HOMEBREW_CELLAR feels wrong but checking Formula['gfortran'] doesn't work because the formula was removed from the repository. Is there a more proper way to do this?