gemfile-pre-commit

#!/bin/sh

# To enable this hook, rename this file to "pre-commit" and add it to .git/hooks/
# of C/P the following block in your existing .git/hooks/pre-commit
#IMPORTANT - for the hook to be active run:
# chmod +x .git/hooks/pre-commit

if [ `git diff --cached --name-only | grep -o Gemfile | wc -l` -eq 1 ]
then
  echo "------------------- ERROR ------------------------"
  echo "Both your Gemfile and your Gemfile.lock must be committed"
  echo "------------------ END ERROR ---------------------"
  exit 1
fi