s3_bucket_object: support template_file

[stevendborrelli]

Use case: we want to populate an s3 object with terraform vars as part of configuring a system. (Think ecs.config getting the cluster name from tf:

Example:

resource "template_file" "ecs-config-file" {
  filename = "s3/ecs.config.tpl"
  vars = { 
    ecs_cluster = "${aws_ecs_cluster.ecs.name}"
    ecs_engine_auth_type = "${var.ecs_engine_auth_type}" 
    ecs_engine_auth_data = "${var.ecs_engine_auth_data}"
  }
}

resource "aws_s3_bucket_object" "ecs-config-file" {
  bucket = "${var.environment}-ecs-config"
  key = "ecs.config"
  source = "${template_file.ecs-config-file.rendered}"
}

[mnylen]

+1

[jaakkos]

+1

[apparentlymart]

I think this is what the PR #3200 achieves.

[ghost]

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