// FIXME: this should move into the "ar" library itself
func addFileToAr(arWriter *ar.Writer, filename string) error {
dataF, err := os.Open(filename)
if err != nil {
return nil
}
defer dataF.Close()
stat, err := dataF.Stat()
if err != nil {
return err
}
size := stat.Size()
hdr := &ar.Header{
Name: filepath.Base(filename),
ModTime: time.Now(),
Mode: int64(stat.Mode()),
Size: size,
}
arWriter.WriteHeader(hdr)
_, err = io.Copy(arWriter, dataF)
// io.Copy() is confused by the fact that a ar file must be even
// aligned, so it may return a bigger amounts of bytes written
// than requested. This is not a error so we ignore it
if err != io.ErrShortWrite {
return err
}
return nil
}
func addArFile(now time.Time, w *ar.Writer, name string, body []byte) error {
hdr := ar.Header{
Name: name,
Size: int64(len(body)),
Mode: 0644,
ModTime: now,
}
if err := w.WriteHeader(&hdr); err != nil {
return fmt.Errorf("cannot write file header: %v", err)
}
_, err := w.Write(body)
return err
}
// FIXME: this should move into the "ar" library itself
func addDataToAr(arWriter *ar.Writer, filename string, data []byte) error {
size := int64(len(data))
hdr := &ar.Header{
Name: filename,
ModTime: time.Now(),
Mode: 0644,
Size: size,
}
arWriter.WriteHeader(hdr)
_, err := arWriter.Write([]byte(data))
if err != nil {
return err
}
return nil
}