pre commit hook for rspec focus

pre-commit-rspec.sh

#!/bin/sh

exec 1>&2

if [ $? -eq 0 ]
then
  echo "Error: attempted to check in an rspec *_spec.rb file which contains a focus."
  echo "Do \"find . -name '*_spec.rb' | xargs egrep '^\s*(describe|it|context)\b.*focus'\" to find out."
  exit 1
fi