var-file flag doesn't do home directory expansion

[peterkh]

Under OSX (haven't tested on other OSs) the command:

terraform plan -var-file=~/.terraform-vars

fails by just displaying the usage message (error message would be helpful as well). Where as:

terraform plan -var-file=/Users/peterkh/.terraform-vars

works fine.

[mitchellh]

This is your shell. Shells only expand I believe if its in double-quotes or on its own as an arg. For example, this will work terraform plan -var-file ~/.terraform-vars. We can add expansion into Terraform itself to just make it work.

[peterkh]

Yep fair enough, I think that would be good.

[mitchellh]

Fixed