public void WriteBundle(HgBundle hgBundle, Stream stream, HgBundleFormat format, HgBundleCompression compression)
{
//
// First things first -- we need to write out bundle header
var header =
format == HgBundleFormat.BundlePre10 ?
null :
GetCompressionHeader(compression);
if(header != null)
{
var headerBuffer = Encoding.ASCII.GetBytes(header);
stream.Write(headerBuffer, 0, headerBuffer.Length);
} // if
using(var compressedStream = GetCompressedStream(stream, compression))
using(var binaryWriter = new BigEndianBinaryWriter(new BufferedStream(compressedStream, 1024 * 128)))
{
log.Debug("writing changesets");
WriteBundleGroup(hgBundle.Changelog, binaryWriter);
binaryWriter.Flush();
log.Debug("writing manifests");
WriteBundleGroup(hgBundle.Manifest, binaryWriter);
binaryWriter.Flush();
//
// Sometimes HgBundleFile.File has no chunks and Mercurial chokes on that.
log.Debug("writing files");
foreach(var file in hgBundle.Files)
{
string filePath = null;
foreach(var chunk in file.File)
{
if(filePath == null)
{
filePath = file.Path.FullPath.TrimStart('/');
binaryWriter.Write((uint)filePath.Length + 4);
binaryWriter.Write(hgEncoder.EncodeAsLocal(filePath));
log.Debug("writing file '{0}'", filePath);
} // if
WriteChunk(binaryWriter, chunk);
} // foreach
if(filePath != null)
WriteZeroChunk(binaryWriter);
binaryWriter.Flush();
} // foreach
binaryWriter.Write((uint)0);
binaryWriter.Flush();
compressedStream.Flush();
stream.Flush();
} // using
}
private string GetCompressionHeader(HgBundleCompression compression)
{
switch(compression)
{
case HgBundleCompression.None:
return "HG10UN";
case HgBundleCompression.BZip:
//
// Docs say that "HG10BZ" is the correct value,
// but BZip2OutputStream writes that "BZ" all by itself
return "HG10";
case HgBundleCompression.GZip:
return "HG10GZ";
default:
throw new ArgumentOutOfRangeException("compression");
} // switch
}
private Stream GetCompressedStream(Stream stream, HgBundleCompression compression)
{
switch(compression)
{
case HgBundleCompression.None:
return new NonClosingStreamWrapper(stream);
case HgBundleCompression.GZip:
return new ZlibStream(stream, CompressionMode.Compress, CompressionLevel.BestCompression, true);
case HgBundleCompression.BZip:
return new BZip2OutputStream(stream, true);
default:
throw new ArgumentOutOfRangeException("compression");
} // switch
}