//parse the pack's meta data and close it
func (p *packIdxParser) ParsePack() *Pack {
//parse the index and construct the pack
idx := p.parseIdx()
objects := make([]*PackedObject, idx.count)
pack := &Pack{
PackVersion,
objects,
idx,
p.name,
p.packOpener,
nil,
}
//verify the pack file
if err := pack.open(); err != nil {
util.PanicErrf("Could not open pack file %s: %s", pack.name, err)
}
dataParser := util.NewDataParser(bufio.NewReader(pack.file))
dataParser.ConsumeString(PackSignature)
dataParser.ConsumeBytes([]byte{0, 0, 0, PackVersion})
count := dataParser.ParseIntBigEndian(4)
if count != idx.count {
util.PanicErrf("Pack file count doesn't match idx file count for pack-%s!", p.name) //todo: don't panic.
}
pack.close()
return pack
}
func newPackedObjectParser(data []byte, oid *objects.ObjectId) (p *packedObjectParser, e error) {
compressedReader := bytes.NewReader(data)
var zr io.ReadCloser
if zr, e = zlib.NewReader(compressedReader); e == nil {
defer zr.Close()
exploder := util.NewDataParser(bufio.NewReader(zr))
exploded := exploder.Bytes()
explodedReader := bufio.NewReader(bytes.NewReader(exploded))
op := NewObjectParser(explodedReader, oid)
pop := packedObjectParser{
op,
exploded,
}
p = &pop
}
return
}