Git hook to prevent unwanted Gemfile and Gemfile.lock to be commited

pre-commit

#!/bin/sh
#
# This script is triggered before every commit
# It raises an alert when Gemfile or Gemfile.lock has been modified.

# This is usefull when using localy a gem that must be included in Gemfile ( a degugger for instance). 

# 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


#enable user input
exec < /dev/tty


# check if Gemfile is in index
if [ $(git diff --cached | grep -c Gemfile) -gt 0 ]; then
  git status
  read -p "Gemfile has been modified. Are you sure you want to commit Gemfile?(Y/n)" commit
  if [ "$commit" = "Y" ]; then
    echo "Such a badass!"
  else
    echo "Checkouting Gemfile and Gemfile.lock"
    git reset Gemfile*
  fi
fi