wip: extend terraform module to support extra_files_script

terraform/all-in-one/main.tf

@@ -25,6 +25,7 @@ module "install" {
   ssh_private_key        = var.install_ssh_key
   debug_logging          = var.debug_logging
   stop_after_disko       = var.stop_after_disko
+  extra_files_script     = var.extra_files_script
   instance_id            = var.instance_id
 }
 

terraform/all-in-one/variables.tf

@@ -74,3 +74,9 @@ variable "stop_after_disko" {
   description = "Exit after disko formatting"
   default     = false
 }
+
+variable "extra_files_script" {
+  type        = string
+  description = "A script that prepares extra files to be copied to the target host during installation. The script expected to write all its files to the current directory. This directory is rsynced to the target host during installation to the / directory."
+  default     = null
+}

terraform/install/main.tf

@@ -1,16 +1,20 @@
-locals {
-  nixos_anywhere_flags = "${var.stop_after_disko ? "--stop-after-disko" : ""} ${var.debug_logging ? "--debug" : ""} ${var.kexec_tarball_url != null ? "--kexec ${var.kexec_tarball_url}" : "" } --store-paths ${var.nixos_partitioner} ${var.nixos_system} ${var.target_user}@${var.target_host}"
-}
-
 resource "null_resource" "nixos-remote" {
   triggers = {
     instance_id = var.instance_id
   }
   provisioner "local-exec" {
     environment = {
       SSH_PRIVATE_KEY = var.ssh_private_key
+      stop_after_disko = var.stop_after_disko
+      debug_logging = var.debug_logging
+      kexec_tarball_url = var.kexec_tarball_url
+      nixos_partitioner = var.nixos_partitioner
+      nixos_system = var.nixos_system
+      target_user = var.target_user
+      target_host = var.target_host
+      extra_files_script = var.extra_files_script
     }
-    command = "nix run --extra-experimental-features 'nix-command flakes' path:${path.module}/../..#nixos-anywhere -- ${local.nixos_anywhere_flags}"
+    command = "bash run-nixos-anywhere.sh"
     quiet   = var.debug_logging
   }
 }

terraform/install/run-nixos-anywhere.sh

@@ -0,0 +1,31 @@
+# shellcheck shell=bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" &>/dev/null && pwd)"
+args=()
+
+if [[ ${debug_logging-} == "true" ]]; then
+  set -x
+  args+=("--debug")
+fi
+if [[ ${stop_after_disko-} == "true" ]]; then
+  args+=("--stop-after-disko")
+fi
+if [[ ${kexec_tarball_url-} != "" ]]; then
+  args+=("--kexec" "${kexec_tarball_url}")
+fi
+args+=("--store-paths" "${nixos_partitioner} ${nixos_system}")
+if [[ ${extra_files_script-} != "" ]]; then
+  tmpdir=$(mktemp -d)
+  cleanup() {
+    rm -rf "${tmpdir}"
+  }
+  trap cleanup EXIT
+  pushd "${tmpdir}"
+  ${extra_files_script}
+  popd
+  args+=("--extra-files" "${tmpdir}")
+fi
+args+=("${target_user}@${target_host}")
+
+nix run --extra-experimental-features 'nix-command flakes' "path:${SCRIPT_DIR}/../..#nixos-anywhere" -- "${args[@]}"

terraform/install/variables.tf

@@ -56,3 +56,9 @@ variable "stop_after_disko" {
   description = "Exit after disko formatting"
   default     = false
 }
+
+variable "extra_files_script" {
+  type        = string
+  description = "A script that prepares extra files to be copied to the target host during installation. The script expected to write all its files to the current directory. This directory is rsynced to the target host during installation to the / directory."
+  default     = null
+}