Limit Cabbie reboot action to Windows updates.

PiperOrigin-RevId: 623640336

cablib/cablib_windows.go

@@ -149,7 +149,27 @@ func RebootRequired() (bool, error) {
 	}
 	defer r.Clear()
 
-	return r.Value().(bool), nil
+	registryReboot := false
+	k, err := registry.OpenKey(registry.LOCAL_MACHINE, `SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update`, registry.QUERY_VALUE|registry.ENUMERATE_SUB_KEYS)
+	if err != nil {
+		return false, err
+	}
+	defer k.Close()
+
+	names, err := k.ReadSubKeyNames(-1)
+	if err != nil {
+		return false, err
+	}
+
+	if StringInSlice(`RebootRequired`, names) {
+		registryReboot = true
+	}
+
+	if r.Value().(bool) && registryReboot {
+		return true, nil
+	}
+
+	return false, nil
 }
 
 // GetUpdateTitles loops through an update collection and returns a list of titles.