/// <summary>
/// Collects data from the locations indicated by the differences between the <see cref="Start"/> state and the current system state.
/// </summary>
/// <param name="handler">A callback object used when the the user needs to be informed about IO tasks.</param>
/// <exception cref="InvalidOperationException">No installation directory was detected.</exception>
/// <exception cref="OperationCanceledException">The user canceled the task.</exception>
/// <exception cref="IOException">There was an error accessing the registry or file system.</exception>
/// <exception cref="UnauthorizedAccessException">Access to the registry or file system was not permitted.</exception>
public void Diff([NotNull] ITaskHandler handler)
{
#region Sanity checks
if (handler == null) throw new ArgumentNullException(nameof(handler));
#endregion
_diff = new SnapshotDiff(before: _snapshot, after: Snapshot.Take());
if (string.IsNullOrEmpty(InstallationDir)) InstallationDir = _diff.GetInstallationDir();
_feedBuilder.ImplementationDirectory = InstallationDir;
_feedBuilder.DetectCandidates(handler);
}
/// <summary>
/// Collects data from the locations indicated by the differences between the <see cref="Start"/> state and the current system state.
/// </summary>
/// <param name="handler">A callback object used when the the user needs to be informed about IO tasks.</param>
/// <exception cref="InvalidOperationException">No installation directory was detected.</exception>
/// <exception cref="OperationCanceledException">The user canceled the operation.</exception>
/// <exception cref="IOException">There was an error accessing the registry or file system.</exception>
/// <exception cref="UnauthorizedAccessException">Access to the registry or file system was not permitted.</exception>
public void Diff([NotNull] ITaskHandler handler)
{
#region Sanity checks
if (handler == null)
{
throw new ArgumentNullException("handler");
}
#endregion
_diff = new SnapshotDiff(before: _snapshot, after: Snapshot.Take());
if (string.IsNullOrEmpty(InstallationDir))
{
InstallationDir = _diff.GetInstallationDir();
}
_feedBuilder.ImplementationDirectory = InstallationDir;
_feedBuilder.DetectCandidates(handler);
}
