adding .TEMPLATE_SHA

github_files.tf

@@ -14,8 +14,33 @@ resource "github_repository_file" "codeowners" {
   }
 }
 
+
+data "github_repository" "template_repo" {
+  count     = var.template_repo == null ? 0 : 1
+  full_name = "${var.template_repo_org}/${var.template_repo}"
+}
+
+data "github_ref" "ref" {
+  count      = var.template_repo == null ? 0 : 1
+  owner      = var.template_repo_org
+  repository = var.template_repo
+  ref        = "heads/${element(data.github_repository.template_repo, 0).default_branch}"
+}
+
+locals {
+  extra_files = concat(
+    var.extra_files,
+    var.template_repo == null ? [] : [
+      {
+        path    = ".TEMPLATE_SHA",
+        content = data.github_ref.ref[0].sha
+      }
+    ]
+  )
+}
+
 resource "github_repository_file" "extra_files" {
-  for_each            = tomap({ for file in var.extra_files : "${element(split("/", file.path), length(split("/", file.path)) - 1)}" => file })
+  for_each            = tomap({ for file in local.extra_files : "${element(split("/", file.path), length(split("/", file.path)) - 1)}" => file })
   repository          = github_repository.repo.name
   branch              = var.github_default_branch
   file                = each.value.path
@@ -28,3 +53,5 @@ resource "github_repository_file" "extra_files" {
     ]
   }
 }
+
+