Fix attributes (#15)

Author: aknysh

main.tf

@@ -1,10 +1,10 @@
 module "origin_label" {
-  source     = "git::https://github.com/cloudposse/terraform-null-label.git?ref=tags/0.3.1"
+  source     = "git::https://github.com/cloudposse/terraform-null-label.git?ref=tags/0.3.3"
   namespace  = "${var.namespace}"
   stage      = "${var.stage}"
   name       = "${var.name}"
   delimiter  = "${var.delimiter}"
-  attributes = ["origin"]
+  attributes = ["${compact(concat(var.attributes, list("origin")))}"]
   tags       = "${var.tags}"
 }
 
@@ -70,7 +70,7 @@ module "logs" {
   stage                    = "${var.stage}"
   name                     = "${var.name}"
   delimiter                = "${var.delimiter}"
-  attributes               = ["logs"]
+  attributes               = ["${compact(concat(var.attributes, list("logs")))}"]
   tags                     = "${var.tags}"
   prefix                   = "${var.log_prefix}"
   standard_transition_days = "${var.log_standard_transition_days}"
@@ -79,12 +79,13 @@ module "logs" {
 }
 
 module "distribution_label" {
-  source    = "git::https://github.com/cloudposse/terraform-null-label.git?ref=tags/0.3.1"
-  namespace = "${var.namespace}"
-  stage     = "${var.stage}"
-  name      = "${var.name}"
-  delimiter = "${var.delimiter}"
-  tags      = "${var.tags}"
+  source     = "git::https://github.com/cloudposse/terraform-null-label.git?ref=tags/0.3.3"
+  namespace  = "${var.namespace}"
+  stage      = "${var.stage}"
+  name       = "${var.name}"
+  delimiter  = "${var.delimiter}"
+  attributes = "${var.attributes}"
+  tags       = "${var.tags}"
 }
 
 resource "null_resource" "default" {

variables.tf

@@ -1,14 +1,34 @@
-variable "name" {}
-variable "namespace" {}
-variable "stage" {}
+variable "namespace" {
+  description = "Namespace (e.g. `cp` or `cloudposse`)"
+  type        = "string"
+}
 
-variable "tags" {
-  type    = "map"
-  default = {}
+variable "stage" {
+  description = "Stage (e.g. `prod`, `dev`, `staging`)"
+  type        = "string"
+}
+
+variable "name" {
+  description = "Name  (e.g. `bastion` or `db`)"
+  type        = "string"
 }
 
 variable "delimiter" {
-  default = "-"
+  type        = "string"
+  default     = "-"
+  description = "Delimiter to be used between `name`, `namespace`, `stage`, etc."
+}
+
+variable "attributes" {
+  type        = "list"
+  default     = []
+  description = "Additional attributes (e.g. `policy` or `role`)"
+}
+
+variable "tags" {
+  type        = "map"
+  default     = {}
+  description = "Additional tags (e.g. map('BusinessUnit`,`XYZ`)"
 }
 
 variable "enabled" {