Fix Terraform Validate failing because AWS_DEFAULT_REGION isn't set

[Makeshift]

terraform validate will fail to run if AWS_DEFAULT_REGION isn't set, as of 0.13.

Setting it to us-east-1 shouldn't matter, as Terraform does no provider checks anyway.

[ahmad-hamade]

@Makeshift I solved this issue by passing the region name as an args to the hook:

  - repo: git://github.com/antonbabenko/pre-commit-terraform
    rev: v1.43.0
    hooks:
      - id: terraform_validate
        args: ['--envs=AWS_DEFAULT_REGION="eu-west-1"']

You would still need to run terraform init before running the hook.