Introduce plan argument to destroy job

templates/destroy.yml

@@ -45,6 +45,9 @@ spec:
     auto_destroy:
       default: 'false'
       description: 'Whether the destroy job is manual or automatically run.'
+    plan:
+      default: ''
+      description: 'Path to a previously generated destroy plan.'
 
 ---
 
@@ -67,4 +70,11 @@ spec:
   image:
     name: '$[[ inputs.image_registry_base ]]/gitlab-opentofu:$[[ inputs.version ]]-opentofu$[[ inputs.opentofu_version ]]'
   script:
-    - gitlab-tofu destroy
+    - |
+      if [ -z '$[[ inputs.plan ]]' ]; then
+        echo 'gitlab-tofu destroy'
+        gitlab-tofu destroy
+      else
+        echo 'gitlab-tofu destroy "$[[ inputs.plan ]]"'
+        gitlab-tofu destroy "$[[ inputs.plan ]]"
+      fi