main.tf

locals {
  lbrace = "{"
}

data "null_data_source" "elements" {
  count = length(var.terraform_output)

  inputs = {
    key    = var.terraform_output[count.index]["key"]
    string = "\"${var.terraform_output[count.index]["value"]}\""
    array  = var.terraform_output[count.index]["value"]
    map    = replace(var.terraform_output[count.index]["value"], ":", "=")

    is_array  = substr(var.terraform_output[count.index]["value"], 0, 1) == "["
    is_map    = substr(var.terraform_output[count.index]["value"], 0, 1) == local.lbrace
    is_string = substr(var.terraform_output[count.index]["value"], 0, 1) != "[" && substr(var.terraform_output[count.index]["value"], 0, 1) != local.lbrace
  }
}

data "template_file" "outputs" {
  count = length(var.terraform_output)

  template = <<TEMPLATE
output "$${key}" {
  value = $${value}
}
TEMPLATE


  vars = {
    key   = data.null_data_source.elements[count.index].outputs["key"]
    value = data.null_data_source.elements[count.index].outputs["is_string"] ? data.null_data_source.elements[count.index].outputs["string"] : (data.null_data_source.elements[count.index].outputs["is_array"] ? data.null_data_source.elements[count.index].outputs["array"] : data.null_data_source.elements[count.index].outputs["map"])
  }
}

locals {
  rendered = join("\n", data.template_file.outputs.*.rendered)
}

resource "aws_s3_bucket_object" "output" {
  bucket           = var.bucket
  key              = var.key
  content          = local.rendered
  content_language = "en-US"
  etag             = md5(local.rendered)

  tags = var.tags
}