/// <summary>
/// Filter supplied <c>files</c>, removing any files which itself, or one
/// of its parent folders, is excluded by the <c>filter</c>.
/// </summary>
/// <param name="files">Files to filter</param>
/// <param name="filter">Exclusion filter</param>
/// <param name="cache">Cache of included and exculded files / folders</param>
/// <param name="errorCallback"></param>
/// <returns>Filtered files</returns>
private IEnumerable <string> FilterExcludedFiles(IEnumerable <string> files,
Utility.Utility.EnumerationFilterDelegate filter, IDictionary <string, bool> cache, Utility.Utility.ReportAccessError errorCallback = null)
{
var result = new List <string>();
foreach (var file in files)
{
var attr = m_snapshot.FileExists(file) ? m_snapshot.GetAttributes(file) : FileAttributes.Normal;
try
{
if (!filter(file, file, attr))
{
continue;
}
if (!IsFolderOrAncestorsExcluded(Utility.Utility.GetParent(file, true), filter, cache))
{
result.Add(file);
}
}
catch (System.Threading.ThreadAbortException)
{
throw;
}
catch (Exception ex)
{
errorCallback?.Invoke(file, file, ex);
filter(file, file, attr | Utility.Utility.ATTRIBUTE_ERROR);
}
}
return(result);
}
/// <summary>
/// Extension method for ISnapshotService which determines whether the given path is a symlink.
/// </summary>
/// <param name="snapshot">ISnapshotService implementation</param>
/// <param name="path">File or folder path</param>
/// <returns>Whether the path is a symlink</returns>
public static bool IsSymlink(this ISnapshotService snapshot, string path)
{
return(snapshot.IsSymlink(path, snapshot.GetAttributes(path)));
}
