F #3629: Add onevnet orphans (#3794)

src/cli/one_helper/onevnet_helper.rb

@@ -192,6 +192,29 @@ class OneVNetHelper < OpenNebulaHelper::OneHelper
         puts template
     end
 
+    def check_orphans
+        orphans = []
+        xpath = '/VMTEMPLATE_POOL/VMTEMPLATE/TEMPLATE/NIC'
+
+        pool = factory_pool
+        tmpl_pool = OpenNebula::TemplatePool.new(@client, -2)
+
+        pool.info
+        tmpl_pool.info
+
+        pool.each do |img|
+            attrs = { :id    => img['ID'],
+                      :name  => img['NAME'],
+                      :uname => img['UNAME'] }
+
+            orphans << img['ID'] if check_orphan(tmpl_pool,
+                                                 xpath,
+                                                 'NETWORK', attrs)
+        end
+
+        orphans
+    end
+
     private
 
     def factory(id=nil)

src/cli/onevnet

@@ -429,4 +429,14 @@ CommandParser::CmdParser.new(ARGV) do
             vnet.unlock
         end
     end
+
+    show_desc = <<-EOT.unindent
+        Shows orphans vnets (i.e vnets not referenced in any template).
+    EOT
+
+     command :orphans, show_desc do
+        puts helper.check_orphans
+
+         return 0
+    end
 end