`tfvars` files should not be gitignore-d as they are used to parameterize a Terraform root for multiple environments, e.g.:
```bash
$ tree terraform/roots/vpc
terraform/roots/vpc
├── env
│ ├── production.tfvars
│ ├── qa.tfvars
│ └── staging.tfvars
└── main.tf
```
There may be a use case where a particular `tfvars` file should be ignored, but there's no naming convention I'm aware of to easily designate such a file.
Josh KodroffandGitHub