pre-commit hook to avoid commit of :focus

pre-commit.sh

#!/bin/bash
#
# pre-commit hook, avoid committing :focus on rspec examples
focus=', :focus'
result=$(git grep -n $focus -- */**/*_spec.rb)

if [ "$result" != '' ]; then
  echo "" 
  echo "Refusing to commit a :focus tag in specs: " 
  echo "" 
  echo $result
  echo ""
  exit 1
fi