local: Revert: implement OpenChunkWriter and ChunkWriter for local ba…

…ckend #7056"

This reverts commit 88acf4d.

backend/local/local.go

@@ -1338,67 +1338,6 @@ func (f *Fs) OpenWriterAt(ctx context.Context, remote string, size int64) (fs.Wr
 	return out, nil
 }
 
-func (f *Fs) OpenChunkWriter(ctx context.Context, src fs.ObjectInfo, options ...fs.OpenOption) (chunkSize int64, writer fs.ChunkWriter, err error) {
-	out, writerErr := f.OpenWriterAt(ctx, src.Remote(), src.Size())
-	if writerErr != nil {
-		return -1, nil, errors.New("failed to open chunk writer")
-	}
-
-	for _, opt := range options {
-		switch x := opt.(type) {
-		case *fs.ChunkOption:
-			chunkSize = x.ChunkSize
-		default:
-			// Do nothing
-		}
-	}
-
-	if chunkSize == 0 {
-		return -1, nil, errors.New("invalid chunkSize provided")
-	}
-
-	chunkWriter := &localChunkWriter{
-		file:      out,
-		chunkSize: chunkSize,
-		remote:    src.Remote(),
-		f:         f,
-	}
-	return chunkSize, chunkWriter, writerErr
-}
-
-type localChunkWriter struct {
-	file      fs.WriterAtCloser
-	chunkSize int64
-	remote    string
-	f         *Fs
-}
-
-func (w *localChunkWriter) WriteChunk(chunkNumber int, reader []byte) (int, error) {
-	offset := int64(chunkNumber) * w.chunkSize
-	n, err := w.file.WriteAt(reader, offset)
-	if err != nil {
-		return -1, errors.New("failed to write chunk")
-	}
-	fs.Debugf(w.remote, "wrote chunk %v with %v bytes", chunkNumber, n)
-	return n, nil
-}
-
-func (w *localChunkWriter) Abort() error {
-	err := os.Remove(w.f.localPath(w.remote))
-	if err != nil {
-		fs.Debugf(w.remote, "failed to delete temp file when aborting chunk writer: %v", err)
-	}
-	return w.Close()
-}
-
-func (w *localChunkWriter) Close() error {
-	err := w.file.Close()
-	if err != nil {
-		return errors.New("failed to close chunk writer")
-	}
-	return nil
-}
-
 // setMetadata sets the file info from the os.FileInfo passed in
 func (o *Object) setMetadata(info os.FileInfo) {
 	// if not checking updated then don't update the stat
@@ -1504,14 +1443,13 @@ func cleanRootPath(s string, noUNC bool, enc encoder.MultiEncoder) string {
 
 // Check the interfaces are satisfied
 var (
-	_ fs.Fs              = &Fs{}
-	_ fs.Purger          = &Fs{}
-	_ fs.PutStreamer     = &Fs{}
-	_ fs.Mover           = &Fs{}
-	_ fs.DirMover        = &Fs{}
-	_ fs.Commander       = &Fs{}
-	_ fs.OpenWriterAter  = &Fs{}
-	_ fs.OpenChunkWriter = &Fs{}
-	_ fs.Object          = &Object{}
-	_ fs.Metadataer      = &Object{}
+	_ fs.Fs             = &Fs{}
+	_ fs.Purger         = &Fs{}
+	_ fs.PutStreamer    = &Fs{}
+	_ fs.Mover          = &Fs{}
+	_ fs.DirMover       = &Fs{}
+	_ fs.Commander      = &Fs{}
+	_ fs.OpenWriterAter = &Fs{}
+	_ fs.Object         = &Object{}
+	_ fs.Metadataer     = &Object{}
 )