Download image if not exists on the system

lib/downloader.rb

@@ -5,6 +5,7 @@ require 'fileutils'
 require 'open-uri'
 
 module Downloader
+    # brew install gnu-tar
     # use_cache => save in the home and return path to it
     # forced => download even if the file exists in the cache, saves to chace if use_cache == true
     def self.get(url, use_cache = true, forced = false)

lib/virtual-machine.rb

@@ -9,16 +9,20 @@ module VirtualMachine
         ISO_URLS[name][arch][type]
     end
 
+    def self.image_id_dir(options)
+        File.join("#{options[:distro].to_s}-#{options[:arch].to_s}", options[:name])
+    end
+
     def self.vm_root_path
         ENV["DAT_VM_DATA"] || File.join(User.cache_path, "vm")
     end
 
     def self.vm_dir(options)
-        File.join(vm_root_path, "image", "#{options[:distro].to_s}-#{options[:arch].to_s}", options[:name])
+        File.join(vm_root_path, "image", image_id_dir(options))
     end
 
     def self.archive_dir(options)
-        File.join(vm_root_path, "archive", "#{options[:distro].to_s}-#{options[:arch].to_s}", options[:name])
+        File.join(vm_root_path, "archive", image_id_dir(options))
     end
     
     def self.create_archive_path(options)
@@ -34,7 +38,10 @@ module VirtualMachine
 
     def self.vm_archive_url(options)
         return nil unless ENV["DAT_VM_REPO_URL"]
-        
+        image_id = image_id_dir(options)
+        uri = Addressable::URI.parse(ENV["DAT_VM_REPO_URL"])
+        uri.path = File.join(uri.path, image_id, "archive.tar.zst")
+        return uri.to_s
     end
 
     def self.root_img_path(options)
@@ -67,6 +74,13 @@ module VirtualMachine
         fill_defaults(options)
 
         disk_img_path = root_img_path(options)
+        unless File.exist?(disk_img_path)
+            url = vm_archive_url(options)
+            Downloader.get(url, use_cache: false) do |path| 
+                Archive.restore(path, vm_dir(options))
+            end
+            #raise "file do not exists"
+        end
         # TODO:
         #    - if image path not exists, check the cache
         #    - if cache do not exists try to download