func()

in tools/build_tar/buildtar.go [204:280]
67 lines of code
15 McCabe index (conditional complexity)

func (f *tarFile) addFile(file, dest string) error {
	dest = strings.TrimLeft(dest, "/")
	dest = filepath.Clean(dest)

	uid := f.meta.getUID(dest)
	gid := f.meta.getGID(dest)
	uname := f.meta.getUname(dest)
	gname := f.meta.getGname(dest)

	dest = filepath.Join(strings.TrimLeft(f.directory, "/"), dest)
	dest = filepath.Clean(dest)

	if ok := f.tryReservePath(dest); !ok {
		klog.Warningf("Duplicate file in archive: %v, picking first occurence", dest)
		return nil
	}

	info, err := os.Stat(file)
	if err != nil {
		return err
	}

	mode := f.meta.getMode(dest)
	// If mode is unspecified, derive the mode from the file's mode.
	if mode == 0 {
		mode = os.FileMode(0644)
		if info.Mode().Perm()&os.FileMode(0111) != 0 {
			mode = os.FileMode(0755)
		}
	}

	header := tar.Header{
		Name:    dest,
		Mode:    int64(mode),
		Uid:     uid,
		Gid:     gid,
		Size:    0,
		Uname:   uname,
		Gname:   gname,
		ModTime: f.meta.modTime,
	}

	if err := f.makeDirs(header); err != nil {
		return err
	}

	switch {
	case info.Mode()&os.ModeSymlink != 0:
		return fmt.Errorf("addFile: didn't expect symlink: %s", file)
	case info.Mode()&os.ModeNamedPipe != 0:
		return fmt.Errorf("addFile: didn't expect named pipe: %s", file)
	case info.Mode()&os.ModeSocket != 0:
		return fmt.Errorf("addFile: didn't expect socket: %s", file)
	case info.Mode()&os.ModeDevice != 0:
		return fmt.Errorf("addFile: didn't expect device: %s", file)
	case info.Mode()&os.ModeDir != 0:
		header.Typeflag = tar.TypeDir
		if err := f.tw.WriteHeader(&header); err != nil {
			return err
		}
	default:
		//regular file
		header.Typeflag = tar.TypeReg
		b, err := ioutil.ReadFile(file)
		if err != nil {
			return err
		}
		header.Size = int64(len(b))
		if err := f.tw.WriteHeader(&header); err != nil {
			return err
		}
		if _, err := f.tw.Write(b); err != nil {
			return err
		}
	}
	return nil
}