packer: don't save the AMIs on PRs

This should save us a ton of resources as we don't use AMIs from PRs.

Signed-off-by: Ondřej Budai <ondrej@budai.cz>

templates/packer/variables.pkr.hcl

@@ -18,6 +18,12 @@ variable "region" {
 # Automatically set by environment variables
 variable "composer_commit" { type = string }
 
+# Controls whether AMIs should be created. If you just need to test whether the image can be built, leave it as true
+variable "skip_create_ami" {
+  type = bool
+  default = true
+}
+
 # The name of the resulting AMI and the underlying EBS snapshot
 variable "image_name" { type = string }
 # A list of users to share the AMI with

templates/packer/worker.pkr.hcl

@@ -20,6 +20,8 @@ source "amazon-ebs" "image_builder" {
   # Network configuration for the instance building our image.
   associate_public_ip_address = true
   ssh_interface = "public_ip"
+
+  skip_create_ami=var.skip_create_ami
 }
 
 build {