refactor: single hcloud_token var definition and remove parallel exec in ci

Signed-off-by: Vojtěch Mareš <vojtech@mares.cz>

.gitlab-ci.yml

@@ -14,13 +14,6 @@ stages:
   - validate
   - build
 
-.parallel:
-  parallel:
-    matrix:
-      - IMAGE:
-        - flatcar-stable
-        - talos-v1.10.3
-
 validate:
   stage: validate
   script:
@@ -28,10 +21,9 @@ validate:
     - packer fmt -check images
     - packer validate images
 
-build-image:
-  extends: .parallel
+build-images:
   stage: build
   script:
-    - packer build $IMAGE.pkr.hcl
+    - packer build images
   rules:
     - if: $CI_COMMIT_BRANCH == "main"

images/_hcloud.hcl

@@ -0,0 +1,5 @@
+variable "hcloud_token" {
+  type      = string
+  default   = env("HCLOUD_TOKEN")
+  sensitive = true
+}

images/talos-v1.10.3.pkr.hcl

@@ -14,12 +14,6 @@ locals {
   talos_version = "v1.10.3"
 }
 
-variable "hcloud_token" {
-  type      = string
-  default   = env("HCLOUD_TOKEN")
-  sensitive = true
-}
-
 source "hcloud" "talos" {
   token = var.hcloud_token