Shows ENV vars in the Rails app that can't be found in the heroku config

missing_heroku_config_vars

#!/bin/bash

echo "These ENV variables only exist in the rails app but not in the heroku config"
echo

envs_in_rails() {
  git grep "ENV\[" | sed "s/.*ENV\[['\"]\(.*\)['\"]\].*/\1/" | sort | uniq
}

envs_in_heroku() {
  heroku config | sed "s/^\([A-Z][^:]*\):.*/\1/" | sort | uniq
}

comm -23 <(envs_in_rails) <(envs_in_heroku)