[gnome-boxes] libvirt-machine-properties: Refactor mark_recommended_resources

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit f2774c73f77591cd791a1423a7b3ae7fb8299d60
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Tue Dec 3 18:35:17 2013 +0000

    libvirt-machine-properties: Refactor mark_recommended_resources
    
    Put code related to getting the os of a machine into a separate method.

 src/libvirt-machine-properties.vala |   27 ++++++++++++++++-----------
 1 files changed, 16 insertions(+), 11 deletions(-)
---
diff --git a/src/libvirt-machine-properties.vala b/src/libvirt-machine-properties.vala
index b5bfbec..c12eca2 100644
--- a/src/libvirt-machine-properties.vala
+++ b/src/libvirt-machine-properties.vala
@@ -372,19 +372,10 @@ private class Boxes.LibvirtMachineProperties: GLib.Object, Boxes.IPropertiesProv
         if (ram_property == null && storage_property == null)
             return;
 
-        var os_id = VMConfigurator.get_os_id (machine.domain_config);
-        if (os_id == null)
+        var os = yield get_os_for_machine (machine);
+        if (os == null)
             return;
 
-        var os_db = MediaManager.get_instance ().os_db;
-        Osinfo.Os os;
-        try {
-            os = yield os_db.get_os_by_id (os_id);
-        } catch (OSDatabaseError error) {
-            warning ("Failed to find OS with ID '%s': %s", os_id, error.message);
-            return;
-        }
-
         var architecture = machine.domain_config.get_os ().get_arch ();
         var resources = OSDatabase.get_recommended_resources_for_os (os, architecture);
         if (resources != null) {
@@ -395,6 +386,20 @@ private class Boxes.LibvirtMachineProperties: GLib.Object, Boxes.IPropertiesProv
         }
     }
 
+    private async Osinfo.Os? get_os_for_machine (LibvirtMachine machine) {
+        var os_id = VMConfigurator.get_os_id (machine.domain_config);
+        if (os_id == null)
+            return null;
+
+        var os_db = MediaManager.get_instance ().os_db;
+        try {
+            return yield os_db.get_os_by_id (os_id);
+        } catch (OSDatabaseError error) {
+            warning ("Failed to find OS with ID '%s': %s", os_id, error.message);
+            return null;
+        }
+    }
+
     private SizeProperty? add_ram_property (ref List<Boxes.Property> list) {
         try {
             var max_ram = machine.connection.get_node_info ().memory;