git pre-commit hook checking for RSpec :focus tags that were unintentionally left in the specs

pre-commit

#!/usr/bin/env ruby

if `git diff --cached spec` =~ /,\s?(:focus|focus:\s?true|:focus\s?=>\s?true)/
  puts "\e[31mPlease focus and remove your :focus tags before committing :)"
  exit 1
end

This is just what I was looking for, thanks!