Add support for using -target in terraformOptions

[BensamV]

I have 2 modules in my terraform file and would like to invoke only one module from the terraform file via my Terratest suite. Unfortunately, there is no support in Terratest for this.

Ideally in my test suite, I would want to call the first module via -target and then call the second module via -target, thereby I can test upgrading to v1.4.6 does not cause any issues.

Terraform does not support using 'count' on modules yet and hence this feature to use -target in terraformOptions of Terratest will be of great help.

Terraform Module

provider "aws" {
region = "${var.region}"
}

module "aws_s3_previous" {
#Testing source from this module
//count = "${var.current == false ? 1: 0}"
source = "git::ssh://xxxx-xxxxxx-xxxxxxxx-xxxxxx-bucket.git?ref=v1.4.5"
region = "${var.region}"
app_name = "${var.app_name}"
owner = "${var.owner}"
allow_force_destroy = "${var.allow_force_destroy}"
}

module "aws_s3_current" {
#Testing source from this module
//count = "${var.current == true ? 1: 0}"
source = "git::ssh://xxxx-xxxxxx-xxxxxxxx-xxxxxx-bucket.git?ref=v1.4.6"
region = "${var.region}"
app_name = "${var.app_name}"
owner = "${var.owner}"
allow_force_destroy = "${var.allow_force_destroy}"
}

terraform {
backend "local" {
path = "../stateFiles/terraform.tfstate"
}
}

Use case

Ability to do "terraform apply -target=${module.aws_s3_previous}" in Terratest.

[brikis98]

Sure, a PR for that would be welcome. You could add it to terraform.Options and if set, add the appropriate CLI args.

[BensamV]

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