private static Entry Read(RepositoryReader reader, string hash, string path)
{
using (var stream = File.OpenRead(path).DeflateForZlibData())
{
var(type, length) = ReadHeader(stream);
switch (type)
{
case "commit":
return(CommitReader.Read(reader, hash, stream));
case "tree":
return(TreeReader.Read(reader, hash, stream, length));
case "blob":
return(new Blob(reader, hash, () =>
{
var s = File.OpenRead(path).DeflateForZlibData();
ReadHeader(s);
return s;
}));
default:
throw new NotImplementedException();
}
}
}
private static Entry ReadEntryStream(RepositoryReader reader, string hash, Stream stream, Stream entryStream, long offset, ObjectType type, long length, Func <Stream> streamProvider)
{
switch (type)
{
case ObjectType.Commit:
return(CommitReader.Read(reader, hash, entryStream));
case ObjectType.Tree:
return(TreeReader.Read(reader, hash, entryStream, length));
case ObjectType.Blob:
return(BlobReader.Read(reader, hash, entryStream, streamProvider));
case ObjectType.OfsDelta:
var(undeltifiedData, undeltifiedLength, baseType) = OfsDeltaReader.Read(
stream, offset, length,
(off, len, pool) => ReadEntryData(reader, hash, stream, off, isNestedDelta: true),
isNestedDelta: false);
using (var undeltifiedStream = new MemoryStream(undeltifiedData))
{
return(ReadEntryStream(reader, hash, stream, undeltifiedStream, 0L, baseType, undeltifiedLength, streamProvider));
}
default:
throw new NotImplementedException();
}
}