add wait for script

kasmvnc/main.tf

@@ -26,12 +26,19 @@ variable "kasm_version" {
   default     = "1.3.1"
 }
 
+variable "wait_for_script" {
+  type        = string
+  description = "The script to wait for before running the KasmVNC script."
+  default     = ""  
+}
+
 resource "coder_script" "kasm_vnc" {
   agent_id     = var.agent_id
   display_name = "KasmVNC"
   icon         = "/icon/kasmvnc.svg"
   script = templatefile("${path.module}/run.sh", {
     PORT : var.port,
+    WAIT_FOR_SCRIPT : var.wait_for_script,
     VERSION : var.kasm_version
   })
   run_on_start = true

kasmvnc/run.sh

@@ -1,5 +1,15 @@
 #!/usr/bin/env bash
 
+# check if there is a WAIT_FOR_SCRIPT env variable and if so, wait for it to be available
+
+# Wait for the startup script to complete
+if [ -n "$WAIT_FOR_SCRIPT" ]; then
+  # This assumes that the script will create a file called /tmp/.coder-${WAIT_FOR_SCRIPT}.done
+  while [ ! -f /tmp/.coder-${WAIT_FOR_SCRIPT}.done ]; do
+    sleep 1
+  done
+fi
+
 # Check if desktop environment is installed
 if ! dpkg -s $PACKAGES &> /dev/null; then
   sudo apt-get update