func createTar(source string) ([]byte, error) {
buff := new(bytes.Buffer)
nilBuff := []byte(nil)
var err error
tarWriter := tar.NewWriter(buff)
// texas ranger :D
walker := func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
fi, err := os.Lstat(path)
if err != nil {
return err
}
mode := fi.Mode()
link := ""
if mode&os.ModeSymlink != 0 {
link, err = os.Readlink(path)
if err != nil {
return err
}
}
hdr, err := tar.FileInfoHeader(fi, link)
if err != nil {
return err
}
hdr.Name = path
err = tarWriter.WriteHeader(hdr)
if err != nil {
return err
}
if !mode.IsRegular() {
return nil
}
f, err := os.Open(path)
if err != nil {
return err
}
fbuff, err := ioutil.ReadAll(f)
if err != nil {
return err
}
f.Close()
_, err = tarWriter.Write(fbuff)
if err != nil {
return err
}
return nil
}
err = filepath.Walk(source, walker)
if err != nil {
return nilBuff, err
}
err = tarWriter.Close()
if err != nil {
return nilBuff, err
}
return buff.Bytes(), nil
}
func (ts *TarSum) Read(buf []byte) (int, error) {
if ts.gz == nil {
ts.bufTar = bytes.NewBuffer([]byte{})
ts.bufGz = bytes.NewBuffer([]byte{})
ts.tarR = tar.NewReader(ts.Reader)
ts.tarW = tar.NewWriter(ts.bufTar)
ts.gz = gzip.NewWriter(ts.bufGz)
ts.h = sha256.New()
// ts.h = verboseHash{sha256.New()}
ts.h.Reset()
ts.first = true
}
if ts.finished {
return ts.bufGz.Read(buf)
}
buf2 := make([]byte, len(buf), cap(buf))
n, err := ts.tarR.Read(buf2)
if err != nil {
if err == io.EOF {
if _, err := ts.h.Write(buf2[:n]); err != nil {
return 0, err
}
if !ts.first {
ts.sums = append(ts.sums, hex.EncodeToString(ts.h.Sum(nil)))
ts.h.Reset()
} else {
ts.first = false
}
currentHeader, err := ts.tarR.Next()
if err != nil {
if err == io.EOF {
if err := ts.gz.Close(); err != nil {
return 0, err
}
ts.finished = true
return n, nil
}
return n, err
}
if err := ts.encodeHeader(currentHeader); err != nil {
return 0, err
}
if err := ts.tarW.WriteHeader(currentHeader); err != nil {
return 0, err
}
if _, err := ts.tarW.Write(buf2[:n]); err != nil {
return 0, err
}
ts.tarW.Flush()
if _, err := io.Copy(ts.gz, ts.bufTar); err != nil {
return 0, err
}
ts.gz.Flush()
return ts.bufGz.Read(buf)
}
return n, err
}
// Filling the hash buffer
if _, err = ts.h.Write(buf2[:n]); err != nil {
return 0, err
}
// Filling the tar writter
if _, err = ts.tarW.Write(buf2[:n]); err != nil {
return 0, err
}
ts.tarW.Flush()
// Filling the gz writter
if _, err = io.Copy(ts.gz, ts.bufTar); err != nil {
return 0, err
}
ts.gz.Flush()
return ts.bufGz.Read(buf)
}