public void Execute()
{
var trackedFiles = new List <ITrackedFile>();
var stopwatch = Stopwatch.StartNew();
this.Messaging.Write(VerboseMessages.ValidatingDatabase());
// Ensure the temporary files can be created the working folder.
var workingFolder = Path.Combine(this.IntermediateFolder, "_validate");
Directory.CreateDirectory(workingFolder);
// Copy the database to a temporary location so it can be manipulated.
// Ensure it is not read-only.
var workingDatabasePath = Path.Combine(workingFolder, Path.GetFileName(this.OutputPath));
FileSystem.CopyFile(this.OutputPath, workingDatabasePath, allowHardlink: false);
var trackWorkingDatabase = this.BackendHelper.TrackFile(workingDatabasePath, TrackedFileType.Temporary);
trackedFiles.Add(trackWorkingDatabase);
var attributes = File.GetAttributes(workingDatabasePath);
File.SetAttributes(workingDatabasePath, attributes & ~FileAttributes.ReadOnly);
var validator = new WindowsInstallerValidator(this, workingDatabasePath, this.CubeFiles, this.Ices, this.SuppressedIces);
validator.Execute();
stopwatch.Stop();
this.Messaging.Write(VerboseMessages.ValidatedDatabase(stopwatch.ElapsedMilliseconds));
this.TrackedFiles = trackedFiles;
}