Add multiline support for runner's build scripts

Author: fpalluel

README.md

@@ -8,6 +8,8 @@ This examples shows:
 - Registration via GitLab token.
 - Auto scaling using `docker+machine` executor.
 - Addtional security groups that are allowed access to the runner agent
+- A multiline pre build script
+- A single line post build script
 
 ![runners-default](https://github.com/npalm/assets/raw/master/images/terraform-aws-gitlab-runner/runner-default.png)
 

examples/runner-default/_docs/README.md

@@ -92,6 +92,15 @@ module "runner" {
       timezone   = var.timezone
     }
   ]
+
+  runners_pre_build_script = <<EOT
+  '''
+  echo 'multiline 1'
+  echo 'multiline 2'
+  '''
+  EOT
+
+  runners_post_build_script = "\"echo 'single line'\""
 }
 
 resource "null_resource" "cancel_spot_requests" {

examples/runner-default/main.tf

@@ -38,7 +38,7 @@ resource "null_resource" "remove_runner" {
 }
 
 locals {
-  enable_asg_recreation = var.enable_forced_updates != null ? ! var.enable_forced_updates : var.enable_asg_recreation
+  enable_asg_recreation = var.enable_forced_updates != null ? !var.enable_forced_updates : var.enable_asg_recreation
 
   template_user_data = templatefile("${path.module}/template/user-data.tpl",
     {
@@ -123,7 +123,7 @@ locals {
       runners_root_size                 = var.runners_root_size
       runners_iam_instance_profile_name = var.runners_iam_instance_profile_name
       runners_use_private_address_only  = var.runners_use_private_address
-      runners_use_private_address       = ! var.runners_use_private_address
+      runners_use_private_address       = !var.runners_use_private_address
       runners_request_spot_instance     = var.runners_request_spot_instance
       runners_environment_vars          = jsonencode(var.runners_environment_vars)
       runners_pre_build_script          = var.runners_pre_build_script

main.tf

@@ -7,9 +7,9 @@ check_interval = 0
   token = "${runners_token}"
   executor = "${runners_executor}"
   environment = ${runners_environment_vars}
-  pre_build_script = "${runners_pre_build_script}"
-  post_build_script = "${runners_post_build_script}"
-  pre_clone_script = "${runners_pre_clone_script}"
+  pre_build_script = ${runners_pre_build_script}
+  post_build_script = ${runners_post_build_script}
+  pre_clone_script = ${runners_pre_clone_script}
   request_concurrency = ${runners_request_concurrency}
   output_limit = ${runners_output_limit}
   limit = ${runners_limit}

template/runner-config.tpl

@@ -257,19 +257,19 @@ variable "runners_environment_vars" {
 variable "runners_pre_build_script" {
   description = "Script to execute in the pipeline just before the build, will be used in the runner config.toml"
   type        = string
-  default     = ""
+  default     = "\"\""
 }
 
 variable "runners_post_build_script" {
   description = "Commands to be executed on the Runner just after executing the build, but before executing after_script. "
   type        = string
-  default     = ""
+  default     = "\"\""
 }
 
 variable "runners_pre_clone_script" {
   description = "Commands to be executed on the Runner before cloning the Git repository. this can be used to adjust the Git client configuration first, for example. "
   type        = string
-  default     = ""
+  default     = "\"\""
 }
 
 variable "runners_request_concurrency" {