/// <inheritdoc/>
public override void Extract(IBuilder builder, Stream stream, string?subDir = null)
{
var symlinks = new List <(string path, string target)>();
var hardlinks = new List <(string path, string existingPath, bool executable)>();
try
{
using var tarStream = new TarInputStream(stream, Encoding.UTF8)
{
IsStreamOwner = false
};
while (tarStream.GetNextEntry() is {} entry)
{
Handler.CancellationToken.ThrowIfCancellationRequested();
string?relativePath = NormalizePath(entry.Name, subDir);
if (string.IsNullOrEmpty(relativePath))
{
continue;
}
switch (entry.TarHeader.TypeFlag)
{
case TarHeader.LF_SYMLINK:
symlinks.Add((relativePath, entry.TarHeader.LinkName));
break;
case TarHeader.LF_LINK:
string?targetPath = NormalizePath(entry.TarHeader.LinkName, subDir);
if (string.IsNullOrEmpty(targetPath))
{
throw new IOException($"The hardlink '{relativePath}' in the archive points to a non-existent file '{entry.TarHeader.LinkName}'.");
}
hardlinks.Add((relativePath, targetPath, IsExecutable(entry)));
break;
case TarHeader.LF_DIR:
builder.AddDirectory(relativePath);
break;
case TarHeader.LF_NORMAL or TarHeader.LF_OLDNORM:
builder.AddFile(relativePath, tarStream.WithLength(entry.Size), entry.TarHeader.ModTime, IsExecutable(entry));
break;
default:
throw new NotSupportedException($"Archive entry '{entry.Name}' has unsupported type: {entry.TarHeader.TypeFlag}");
}
}
foreach ((string path, string target) in symlinks)
{
builder.AddSymlink(path, target);
}
foreach ((string path, string existingPath, bool executable) in hardlinks)
builder.AddHardlink(path, existingPath, executable);
}
#region Error handling
catch (Exception ex) when(ex is SharpZipBaseException or InvalidDataException or ArgumentOutOfRangeException or IndexOutOfRangeException or {
Message: "Data Error"
})
/// <inheritdoc/> public void AddHardlink(string path, string target, bool executable = false) => _underlyingBuilder.AddHardlink(Path.Combine(_prefix, path), Path.Combine(_prefix, target), executable);
