brew/Library/Contributions/cmd/brew-readall.rb

# `brew readall` tries to import all formulae one-by-one.
# This can be useful for debugging issues across all formulae
# when making significant changes to formula.rb,
# or to determine if any current formulae have Ruby issues

require 'formula'
Formula.names.each do |n|
  begin
    Formula.factory(n)
  rescue Exception => e
    onoe "problem in #{Formula.path(n)}"
    puts e
    Homebrew.failed = true
  end
end