Script for detecting if we need to rollback migrations when switching branches

checking_for_non_existing_migration_files.sh

# This git hook script helps us detect if we need to 
# rollback some migrations when switching branches 

# Recipe:
# 1) cd /path/to/your/repo
# 2) touch .git/hooks/post-checkout
# 3) chmod u+x .git/hooks/post-checkout
# 4) add code below to the post-checkout file

#!/bin/bash

set -e
set -u

echo "Inside git post-checkout hook"
echo "Running rake db:migrate:status"
LAST_MIGRATION_FILE=$(bin/rake db:migrate:status 2>/dev/null | tail -n 2 | head -1 | awk '{print $3$4$5$6}')

if [[ $LAST_MIGRATION_FILE == "**********NOFILE**********" ]]
then
  echo -en "\\033[1;31mMaybe you need to get back to the previous branch and rollback some migrations?\\033[0;39m\n"
else
  echo -en "\\033[32mMigrations are OK!\\033[0;39m\n"
fi