Get a list of installed homebrew formula with any options used to install them.

brews

#!/usr/bin/env ruby
#
# Colin Rymer - 2013-03-10
require 'json'

Dir.glob('/usr/local/Cellar/**/INSTALL_RECEIPT.json').each do |brew|
  name = brew.split('/')[4]
  receipt = JSON.load(File.open(brew))
  options = receipt['used_options'].join(' ')
  puts "#{name} #{options unless options.empty?}"
end