This script will pull down an S3 remote configuration before running any terraform actions. Assumes the following structure:

```
main.tf
terraform.cfg
vars/dev
vars/staging
vars/production
```

`ansible.cfg` is required for the remote configuration.

You can use it like so:
```
./terraform-env.sh dev show
./terraform-env.sh staging plan -out plan
./terraform-env.sh production apply -var="some_var=some_value"
```

You can use the script just like you'd use `terraform`, passing whatever arguments you would before. It will only pull the latest environment if the current environment is different from the one you're requesting.