/// <summary>
/// Create a GZip Tar archive of the specified files.
/// </summary>
/// <param name="rootPath">The root path.</param>
/// <param name="outputPath">The output path.</param>
/// <param name="filePaths">The file paths.</param>
/// <param name="level">The compression level (1-9).</param>
public override void Compress(DirectoryPath rootPath, FilePath outputPath, IEnumerable <FilePath> filePaths, int level)
{
Precondition.IsNotNull(rootPath, nameof(rootPath));
Precondition.IsNotNull(outputPath, nameof(outputPath));
Precondition.IsNotNull(filePaths, nameof(filePaths));
Precondition.IsBetween(level, 1, 9, nameof(level));
// Make root path and output file path absolute.
rootPath = rootPath.MakeAbsolute(environment);
outputPath = outputPath.MakeAbsolute(environment);
// Get the output file.
var outputFile = fileSystem.GetFile(outputPath);
// Open up a stream to the output file.
log.Verbose("Creating Zip file: {0}", outputPath.FullPath);
using var outputStream = outputFile.Open(FileMode.Create, FileAccess.Write, FileShare.None);
using var gzipOutputStream = new GZipOutputStream(outputStream);
using var tarOutputStream = new TarOutputStream(gzipOutputStream, Encoding.UTF8);
gzipOutputStream.SetLevel(level);
foreach (var inputPath in filePaths)
{
var absoluteInputPath = inputPath.MakeAbsolute(environment);
var file = fileSystem.GetFile(absoluteInputPath);
using var inputStream = file.Open(FileMode.Open, FileAccess.Read, FileShare.Read);
// Get the relative filename to the rootPath.
var relativeFilePath = GetRelativeFilePath(rootPath, absoluteInputPath);
log.Verbose("Compressing file {0}", absoluteInputPath);
// Create the tar archive entry.
TarEntry entry = TarEntry.CreateTarEntry(relativeFilePath.FullPath);
entry.Size = inputStream.Length;
tarOutputStream.PutNextEntry(entry);
inputStream.CopyTo(tarOutputStream);
tarOutputStream.CloseEntry();
}
log.Verbose("GZip file successfully created: {0}", outputPath.FullPath);
}