Add download_url parameter for airgapped environment support

Author: ausbru87

registry/ausbru87/modules/aws-cli/README.md

@@ -62,3 +62,17 @@ module "aws-cli" {
   log_path = "/var/log/aws-cli.log"
 }
 ```
+
+### Airgapped Environment
+
+Use a custom download URL for environments without internet access to AWS:
+
+```tf
+module "aws-cli" {
+  count        = data.coder_workspace.me.start_count
+  source       = "registry.coder.com/ausbru87/aws-cli/coder"
+  version      = "1.0.0"
+  agent_id     = coder_agent.example.id
+  download_url = "https://internal-mirror.company.com/awscli-exe-linux-x86_64.zip"
+}
+```

registry/ausbru87/modules/aws-cli/aws-cli.tftest.hcl

@@ -23,3 +23,12 @@ run "with_custom_log_path" {
     log_path = "/var/log/aws-cli.log"
   }
 }
+
+run "with_custom_download_url" {
+  command = plan
+
+  variables {
+    agent_id     = "test-agent-id"
+    download_url = "https://internal-mirror.company.com/awscli-exe-linux-x86_64.zip"
+  }
+}

registry/ausbru87/modules/aws-cli/main.tf

@@ -20,6 +20,12 @@ variable "install_version" {
   default     = ""
 }
 
+variable "download_url" {
+  type        = string
+  description = "Custom download URL for AWS CLI. Useful for airgapped environments. If not set, uses the official AWS download URL."
+  default     = ""
+}
+
 variable "log_path" {
   type        = string
   description = "The path to the AWS CLI installation log file."
@@ -33,6 +39,7 @@ resource "coder_script" "aws-cli" {
   script = templatefile("${path.module}/run.sh", {
     LOG_PATH : var.log_path,
     VERSION : var.install_version,
+    DOWNLOAD_URL : var.download_url,
   })
   run_on_start = true
   run_on_stop  = false