template files (#6)

support for template files (`.json.tpl`)

Author: jakebark

locals.tf

@@ -3,4 +3,16 @@
 
 locals {
   policies_directory = var.policies_directory == null ? lower(var.policy_type) : var.policies_directory
+
+  policy_content = merge(
+    {
+      for file_path in fileset(path.root, "${local.policies_directory}/*.json") :
+      file_path => file(file_path)
+    },
+    {
+      for file_path in fileset(path.root, "${local.policies_directory}/*.json.tpl") :
+      replace(file_path, ".json.tpl", ".json") => templatefile(file_path, var.template_variables)
+    }
+  )
 }
+

main.tf

@@ -2,9 +2,9 @@
 // SPDX-License-Identifier: MIT-0
 
 resource "aws_organizations_policy" "this" {
-  for_each = fileset(path.root, "${local.policies_directory}/*.json")
-  name     = trimprefix(trimsuffix(each.value, ".json"), "${local.policies_directory}/")
-  content  = file(each.value)
+  for_each = local.policy_content
+  name     = trimprefix(trimsuffix(each.key, ".json"), "${local.policies_directory}/")
+  content  = each.value
   type     = var.policy_type
 }
 

variables.tf

@@ -12,3 +12,9 @@ variable "policies_directory" {
 variable "policy_type" {
   type = string
 }
+
+variable "template_variables" {
+  description = "Variables to substitute in policy templates (.json.tpl files)"
+  type        = map(string)
+  default     = {}
+}